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Agilent 8504B Precision Re ectometer

1. CENTER 167 35 mm 1300 nm n 1 SPAN 2 mm CENTER 167 35 mm 13 nm nal SPRN 2 mm Averaging off Averaging on The default number of trace averages is 16 Source Minimum Span n 1 1900 nm 1 mm 1550 nm 1 2 mm In wide spans the precision reflectometer captures more data points than it can display adjacent data points are grouped and then the maximum point for each group is displayed As the span is decreased the number of points per group decreases until all the points are displayed Since in wide spans the maximum value is averaged there is a difference between the averaged value and the true value of a signal The difference or inaccuracy increases with noise or span 3 9 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Reducing Displayed Noise The following equation shows the algorithm _ Sn Kn 17 dg An v n where An current average Sn current measurement Ka n forn lt F or F forn gt F F averaging factor 3 10 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Reducing Displayed Noise To reduce the displayed noise 1 Press AVG 2 Press AVERAGING FACTOR and enter the number of traces you want to average 3 Press AVERAGING on OFF so that ON is highlighted 4 You can restart averaging at any time by pressing AVERAGING RE
2. Bit Name Description O Operation complete A command for which OPC has been enabled and completed a operation 1 Request control The reflectometer has been commanded to perform an operatio that requires control of a peripheral and needs control of HP IB Requires the reflectometer to be in use pass control mode 2 Query error The reflectometer has been addressed to talk but there is nothing in the output queue to transmit 4 Execution error A command was received that could not be executed Commonly due to invalid operands or operands sent in the wrong sequence 5 Syntax error An HP IB command had incorrect syntax error spelling or use 6 User request The operator has pressed a front panel key or turned the rotary knob This bit is set regardless of whether the reflectometer is in remote or local Power on A power on sequence has occurred since the last read of the register Event Status Register B Bit Definitions Bit Name Description 0 Sweep or group complete A single sweep or group has been completed since the last read of the register Operates in conjunction with the SING or NUMG commands Service routine waiting or done An internal service routine has completed an operation or is waiting for an operator response 2 Data entry complete A terminator key has been pressed or a value has been inputted to the reflecto
3. Commands Keys versus Commands Key Equivalent Programming Command UP DOWN A MODE OFF DELO A REF 1 to A REF 4 DELR A REF A FIXED MKR DELRFIXM 1300 SOUR1300 1550 SOUR 1550 ADD SADD ADDRESS CONTROLLER ADDRCONT ADDRESS DISK ADDRDISK ADDRESS PLOTTER ADDRPLOT ADDRESS PRINTER ADDRPRIN all OFF ARKOFF AMPLITUDE OFFSET LIMIAMPO ASCII SAVUASCI AUTO SCALE AUTO AVERAGING FACTOR AVERFACT AVERAGING on OFF AVERO AVERAGING RESTART AVERREST BACKGROUND INTENSITY BAC BALANCE RECEIVER BALR BEEP DONE ON off BEEPDONE BEEP FAIL on off BEEPFAIL BEEP WARN on OFF BEEPWARN BRIGHTNESS CBR CALIBRATE MAGNITUDE CAL CENTER CENT CH1 DATA LIMIT LN COLODATA CLEAR ALL CLEARALL 4 54 FINAL TRIM SIZE 7 5 in x 9 0 in Keys versus Commands continued Programming Keys versus Commands Key Equivalent Programming Command CLEAR REG1 to REGS CLE COLOR COLOR PRIC CONTINOUS CONT COPY FROM FILE TITLE COPYFRFT COPY FROM REG TITLES COPYFRRT CORRECTION on OFF CORR DATA MEMORY DAT DATA and MEMORY DISPDATM DATA ARRAY on OFF EXTMDATA DEFAULT COLORS DEFC DELETE SDEL DELTA LIMITS LIMD DISK UNIT NUMBER DISKUNIT DISP MKRS ON off DIS DISPER COR ON off DISPCOR DISPLAY DATA DISPDATA DONE BALD EDITDONE EDIT
4. Instrument Options Option Description 001 Accessory kit 011 HMS 10 front panel test port connector 012 FC PC front panel test port connector 013 Din 47256 front panel test port connector 014 ST front panel test port connector 015 Biconic front panel test port connector BN IL STD 45662A calibration BP IL STD 45682A calibration with data UK6 Commercial calibration with data 5 55 FINAL TRIM SIZE 7 5 in x 9 0 in Line Power Cables Reference CABLE PLUG CABLE CABLE FOR USE PLUG TYPE HP PART DESCRIPTION LENGTH COLOR IN COUNTRY NUMBER CM INCHES 250V 8120 1351 Straight BS1363A 229 90 Mint Gray Great Britain o 8120 1703 90 229 90 Mint Gray Cyprus Nigeria E o o Singapore L N Zimbabwe Argentina 250V 8120 1369 Straight NZSS198 ASC112 201 79 Gray Australia 8120 0696 90 221 87 Gray New Zealand Mainland China 250V 8120 1689 Straight CEE7 Y11 201 79 Mint Gray East and West 8120 1692 90 201 79 Mint Gray Europe Central e African Republic United Arab Republic m unpolarized in many nations 125V 8120 1348 Straight NEMA5 15P 203 80 Black United States 8120 1538 90 203 80 Black Canada Japan 100 V or 8120 1378 Straight NEMAB 15P 203 80 Jade Gray 200 V Brazil Colombia Mexico 8120 4753 Straight 230 90 Jade Gray Phillipines 8120 1521 90 203 80 J
5. n o ETT e pate rend SPAN 28 mm M e CENTER 316 74 mm 1388 nm n 1meas FINAL TRIM SIZE 7 5 in x 9 0 in Guided procedures reduce measurement time Front panel adapters can he changed Softkeys select instrument features The precision reflectometer provides guided setup and guided calibration procedures that help you prepare the instrument for measurements These procedures consist of a series of screens that present step by step instructions Procedure Task guided setup Selects light source and calibrates the instrument for pigtailed or non pigtailed devices guided calibration Calibrates the instrument You can also manually calibrate the instrument for maximum flexibility Refer to Chapter 2 for a complete explaination of guided setups and guided calibrations You should calibrate the instrument e After the instrument has warmed up for 1 hour e Before making any measurements The precision reflectometer s three front panel connectors are compatible with 9 125 um fiber optic cables All three connectors are adapters that can be easily changed or removed for cleaning Simply unscrew each adapter in a counterclockwise direction Useful measurements are achievable with other adapters but measurement performance may not be optimum Refer to Front Panel Fiber Optic Adapters in Chapter 5 for a complete listing of available adapter types M
6. 7 12 FINAL TRIM SIZE 7 5 in x 9 0 in Index FINAL TRIM SIZE 7 5 in x 9 0 in Special characters Index 5 29 1300 nm softkey 3 6 4 49 5 12 1550 nm softkey 3 6 4 49 5 12 1550 nm source chromatic dispersion 2 22 abort a print or plot 3 50 accessories 1 4 accessory kit 1 4 accuracy dynamic 2 21 low level reflections 2 21 apter part number 5 54 apters front panel 5 53 DRCONT command 4 16 DRDISK command 4 16 DRESS CONTROLLER softkey 4 16 4 42 5 12 D D r eo RESS DISK softkey 4 16 5 12 RESSED TO TALK WITH NOTHING TO SAY error message 7 3 dresses HP IB 4 4 RESS HP8504 softkey 5 12 RESS PLOTTER softkey 4 16 5 12 RESS PRINTER softkey 4 17 5 13 RPLOT command 4 16 RPRIN command 4 16 softkey 4 47 5 12 DJUST DISPLAY softkey 5 13 R FLOW RESTRICTED CHECK FAN FILTER error message 7 3 LL MKR OFF softkey 4 37 OFF softkey 5 13 AMPLITUDE OFFSET softkey 3 22 4 32 5 18 annotation 3 45 ANOTHER SYSTEM CONTROLLER ON HP IB error message 7 3 ASCII MISSING error message 7 3 7 4 ASCII softkey 5 13 assistance x audible warnings 3 45 AUTO command 4 17 AUTO FF ON off softkey 5 14 D D D D D D Se Ib I Bb ir g Index 2 FINAL TRIM SIZE 7 5 in x 9 0 in AUTO SCALE softkey 3 7 4 17 5 14 autotransformer 1 2 AUX INPUT connector 5 14 AVERAGING FACTOR softkey 3 11 4 17 5 14 AVERAGING on OFF softke
7. 1 Turn the precision reflectometer on and allow it to warm up for at least one hour 2 Clean all cable connectors and front panel optical ports Refer to Cleaning Connections for Accurate Measurements for information on cleaning connectors 3 Attach one of the 100 cm fiber optic cables to the front panel TEST PORT connector When mating Super PC connectors check to see that the keyways on the Super PC cable connectors are inserted into the slots on the mating connectors 4 If there is a protective cap on the free end of the fiber optic cable remove it 5 Attach the other 100 cm fiber optic cable between the front panel REFERENCE EXTENSION connectors A and B FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 5 Verify Operation The REFERENCE EXTENSION and TEST PORT fiber optic cables must be equal in length in order for reflections to be viewed on the display n n n n m o o m 100 cm Super PC Optic Cables kent2s 6 Press PRESET The wavelength defaults to 1300 nm NOTE Do not move the reference extension cable for the rest of this procedure Any movement of this cable will change the reference signal polarization and will invalidate the calibration FINAL TRIM SIZE 7 5 in x 9 0 in T 8 9 10 11 12 13 Installing Step 5 Verify Operation Press and then GUIDED CAL Use the supplied adapter to connect the low reflection termination to the open en
8. e Specifications describe warranted performance e Characteristics provide useful but nonwarranted information about the functions and performance of the instrument Characteristics are printed in italics 6 2 FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information Contents Specifications aaa 6 4 Characteristics aaa aaa 6 14 Regulatory Information ssssssssssse eeraa 6 16 6 3 FINAL TRIM SIZE 7 5 in x 9 0 in Specifications This product is designed for use in INSTALLATION CATEGORY II and CAUTION POLLUTION DEGREE 2 per IEC 1010 and 664 respectively LED Classification International IEC Class 1 This instrument is rated IEC International Electrotechnical Commission Class 1 LED Product according to Publication 825 6 4 FINAL TRIM SIZE 7 5 in x 9 0 in Description Specification Specifications and Regulatory Information Specifications Return Loss Measurement Range The return loss range specifies the range of reflection levels that can be measured Reflections that are larger than 10 dB for example 5 dB may be inaccurate due to receiver saturation Reflections smaller than 80 dB for example 85 dB may be less accurate due to instrument noise floor limitations At 1550 nm the 80 dB specification applies only over the 0 to 100 mm mirror position range with dispersion correction enabled Refer to To turn chromatic dispersi
9. FINAL TRIM SIZE 7 5 in x 9 0 in CLEAR REGn CLEAR REGISTER COLOR CONFIGURE PLOT CONTINUOUS Cory COPY FROM FILE TITLE Reference Keys Softkeys and Connectors Clears the specified instrument state register 1 2 3 4 or 5 Key Path SAVE CLEAR REGISTER CLEAR REGn Presents a menu that is used to clear instrument state registers Key Path SAVE CLEAR REGISTER In the COPY menus this softkey specifies a color printer In the DISPLAY menus this softkey changes the color of the selected element Values ranges from 0 no color all white to 100 all color no white For example when the tint is red increasing the color changes it from white no color to pink light red red brilliant red Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS DATA LIMIT LN COLOR Key Path COPY PRINT PLOT SETUPS COLOR Displays a menu from which you can select plotter pens for drawing specific display items Key Path COPY CONFIGURE PLOT This is the standard sweep state The sweep is triggered automatically and continuously and the trace is updated with each sweep Key Path MEAS CONTINUOUS Presents a menu for printing and plotting the display Renames the instrument state registers to match the current names of the store files For example the default names of the instrument state registers are REGI through REGS The default names of the store files are FILEI through FILES Press
10. Nitrogen gas or compressed dust remover can also be used Do not shake tip or invert compressed air canisters because this releases particles in the can into the air Refer to instructions provided on the compressed air canister 7 As soon as the connector is dry connect or cover it for later use 1 23 FINAL TRIM SIZE 7 5 in x 9 0 in CAUTION Installing Cleaning Connections for Accurate Measurements To clean an adapter 1 Apply isopropyl alcohol to a clean foam swab Cotton swabs can be used as long as no cotton fibers remain after cleaning The foam swabs listed in this section s introduction are small enough to fit into adapters Although foam swabs can leave filmy deposits these deposits are very thin and the risk of other contamination buildup on the inside of adapters greatly outweighs the risk of contamination by foam swabs 2 Clean the adapter with the foam swab 3 Dry the inside of the adapter with a clean dry foam swab 4 Blow through the adapter using filtered dry compressed air Nitrogen gas or compressed dust remover can also be used Do not shake tip or invert compressed air canisters because this releases particles in the can into the air Refer to instructions provided on the compressed air canister To test insertion loss Use an appropriate lightwave source and a compatible lightwave receiver to test insertion loss Examples of test equipment configurations include th
11. CLEAR ALL Clears the status byte the event status register and the event status register B Syntax CLES Clears the status byte the event status register and the event status register B Syntax CLS Specifies the display element to change color data and limit lines memory 1 memory 2 the graticule text or warning messages The color changes are accomplished by the commands CBRI COLOR and TINT See those commands for more details Syntax COLO DATA MEM1 MEM2 GRAT TEXT WARN 4 20 FINAL TRIM SIZE 7 5 in x 9 0 in COLOR CONT COPYFRFT COPYFRRT CORR Programming Instrument Commands Equivalent softkey DISPLAY DATA LIMIT LN MEMORY 1 MEMORY 2 REF LINE GRATICULE TEXT WARNING and TEXT Specifies the saturation percent of the specified display format See COLO above Syntax COLOR lt value gt Item Description value lo to 100 Equivalent softkey DISPLAY COLOR Continuous trigger Syntax CONT Equivalent softkey MEAS CONTINUOUS Copies the disk file titles into the register titles Syntax COPYFRFT Equivalent softkey SAVE COPY FROM FILE TITLE Copies the register titles into the disk file titles Syntax COPYFRRT Equivalent softkey SAVE COPY FROM REG TITLES Sets the correction function on or off Syntax CORR ON OFF Equivalent softkey CAL CORRECTION on OFF 4 2 FINAL TRIM SIZE 7 5 in x 9 0 in DATI DEBU DEFC D
12. DISPLAY MEMORY In the first level of the DISPLAY menu selects memory 1 as the active trace memory The active memory is the one displayed stored to or otherwise changed by memory functions Under the DISPLAY menu s MODIFY COLORS presents softkeys for changing the tint brightness and color of the displayed memory 1 trace Key Path DISPLAY MEMORY 1 Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS MEMORY 2 REF LINE 5 33 FINAL TRIM SIZE 7 5 in x 9 0 in MEMORY 2 MEMORY 2 REF LINE MIDDLE VALU E MKR MKR FCTN MKR VALUES ON off Reference Keys Softkeys and Connectors Selects memory 1 as the active trace memory The active memory is the one displayed stored to or otherwise changed by memory functions Key Path DISPLAY MEMORY 2 Presents softkeys for changing the tint brightness and color of the displayed memory 2 trace and the reference line Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS MEMORY 2 REF LINE Presents a menu for selecting the source and changing the instruments horizontal measurement span Sets the midpoint for limit line DELTA LIMITS It sets a specified magnitude value vertically centered between the limits Key Path MIDDLE VALUE Displays a menu of basic marker functions including normal fixed and delta markers Displays a menu of marker functions that can be used to perform peak searches and change the measurement range Cause
13. LOCAL ADDRESS PRINTER Selects the scale div value automatically to fit the trace data to the display Syntax AUTO Equivalent softkey SCALE REF AUTO SCALE Sets the averaging factor Syntax AVERFACT lt value gt Item Description value 1 to 999 Equivalent softkey AVG AVERAGING FACTOR Sets the averaging function on or off Syntax AVERO ON OFF Equivalent softkey AVG AVERAGING on OFF Resets and restarts averaging Syntax AVERREST Equivalent softkey AVG AVERAGING RESTART Sets the background intensity of the display as a percent of the white level Syntax BACI lt value gt Item Description value O to 100 FINAL TRIM SIZE 7 5 in x 9 0 in 4 17 BALD BALE BALR BEEPDONE BEEPFAIL BEEPWARN Programming Instrument Commands Equivalent softkey DISPLAY BACKGROUND INTENSITY Saves results of receiver balance Syntax BALD Equivalent softkey CAL DONE Exits receiver balance before completion Syntax BALE Equivalent softkey CAL EXIT Initiates receiver balance and measures offsets Syntax BALR Equivalent softkey DISPLAY BALANCE RECEIVER Sets the operation completion beeper on or off Syntax BEEPDONE ON OFF 7 Equivalent softkey DISPLAY BEEP DONE on off Sets the limit fail beeper on or off Syntax BEEPFAIL ON OFF Equivalent softkey SYSTEM BEEP FAIL on off Sets the warning beeper on or off
14. MKR A MENU Turns off the delta marker mode so that the displayed marker annotation shows absolute values Key Path MKR A MENU A OFF Establishes the fixed marker as the reference for delta markers This softkey is identical to the MARKER FIXED MKR softkey Key Path MKR A MENU AREF FIXED MKR Establishes the selected marker as the delta reference The active marker distance or time and amplitude values are then shown relative to this reference The annotation AREF is added to the softkey label Key Path MKR A MENU AREF MKR n FINAL TRIM SIZE 7 5 in x 9 0 in 1300 nm 1550 nm ADD ADDRESS CONTROLLER ADDRESS DISK ADDRESS HP8504 ADDRESS PLOTTER Reference Keys Softkeys and Connectors Selects the internal 1300 nm source Key Path MENU 1300 nm Selects the internal 1550 nm source Key Path MENU 1550 nm Displays a menu that is used for adding new segments to the end of a limit line table The new segment is initially a duplicate of the segment indicated by the pointer gt If the table is empty a default segment is displayed Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE ADD Enters the HP IB address that the precision reflectometer uses to communicate with an external controller Key Path LOCAL SET ADDRESSES ADDRESS CONTROLLER Enters the HP IB address that the precision reflectometer uses to communicate with an external disk drive Key Path LOC
15. User s Guide Agilent 8504B Precision Reflectometer FINAL TRIM SIZE 7 5 in x 9 0 in Agilent part number 08504 90055 Printed in USA July 2001 Lightwave Division 3910 Brickway Boulevard Santa Rosa CA 95403 USA Instrument Support Center 800 403 0801 Notice The information contained in this document is subject to change without notice Agilent Technologies makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Restricted Rights Legend Use duplication or disclosure by the U S Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 for DOD agencies and subparagraphs c 1 and c 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 for other agencies Copyright Agilent Technologies 1992 1993 1994 1995 2001 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws FINAL TRIM SIZE 7 5 in x 9 0 in WARNING WARNING WARNING CAUTION CAUTION
16. b Press DONE C Use the LIMIT TYPE softkey to enter the segment TYPE flat slope or single point To display or hide limit lines 1 Press SYSTEM 2 Press LIMIT MENU and then LIMIT LINE on OFF 3 23 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Creating Limit Lines To turn on limit testing 1 Press SYSTEM 2 Press LIMIT MENU and then LIMIT TEST on OFF The words PASS or FAIL should appear on the screen 3 Press BEEP FAIL on OFF so that ON is highlighted if you want the instrument to sound an alarm when a limit line is crossed 3 24 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Creating Limit Lines Tutorial Using Limit Lines The following example procedure draws the limit lines shown below DATA log MAG 18 dB REF 5B dB il 54 B72 dB hp 25 mm C Y FASS gt erweelt ingerere et ap eA e d CENTER 35 mm 1388 nm n 1 SPAM Z8 mm Limit Line Table SEG POSITION nm Upper dB Lower dB TYPE 1 33 000 55 200 SL 2 34 000 9 200 FL 3 36 000 45 200 FL 4 36 000 45 200 SP 5 37 000 45 200 SP 3 25 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Creating Limit Lines View a Fresnel 1 Attach one of the 75 cm fiber optic cables to the front panel TEST PORT response connector 2 If there is a p
17. 3 15 Performing Measurements Using Markers To display a peak response 1 Press MKR FCTN 2 Press MAX SEARCH 3 If the marker is not on the desired response front panel knob or PEAK SEARCH menus to place the marker 4 Press MKR ZOOM as needed to center the response and reduce the measurement span To change the measurement range 1 Press MKR FCTN 2 Use the front panel knob to position the marker at the desired start position Press MARKER A START 3 Use the front panel knob to position the marker at the desired stop position Press MARKER A STOP To make relative measurements 1 Press and then MARKER 1 2 Position marker 1 at the reference position from which relative measurements will be make 3 Press A MENU 4 Press AREF MKR 1 and then 3 16 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Using Markers 5 Press MARKER 2 to read delta values marker 2 marker 1 To position a fixed reference marker 1 Press MKR and then A MENU 2 Press AREF FIXED MKR 3 Press FIXED MKR MENU 4 Position the marker using FIXED MKR POSITION and FIXED MKR VALUE You can also specify the position value using the MKR MARKER FIXED MKR or MKRFCTN MARKER FIXED MKR softkeys To change the peak definition l Press MKR FCTN and then PEAK SEARCH 2 Press DEFINE PEAK and then PEAK EXCURSION 3 Enter the value that defines a peak 4 Press P
18. 4 47 SAVE key enu map 5 7 key 5 42 REGI softkey 5 43 REG2 softkey 5 43 REG3 softkey 5 43 SAVE REG4 softkey 5 43 SAVE REGS softkey 5 43 SAVUASCI command 4 47 SAVUBINA command 4 47 SC adapter 5 53 SCAL command 4 47 SCALE DIV softkey 5 43 SCALE DIV softkey 4 48 SCALE PLOT softkey 4 48 5 43 SCALE REF key 3 7 menu map 5 10 SCALE REF key 5 43 SCAP command 4 48 SDEL command 4 48 SDON command 4 48 SEDI command 4 48 SEGMENT softkey 5 44 SELECT LETTER softkey 5 44 SELECT QUADRANT softkey 5 44 sensitivity 3 5 serial number 1 5 service 1 27 foam inserts 1 27 repackaging 1 27 returning to factory 1 27 SERVICE MENU softkey 4 49 5 40 service repair form 1 28 SET ADDRESSES softkey 3 44 5 44 shipping containers 1 26 SING command 4 48 SINGLE POINT softkey 5 45 SINGLE softkey 3 6 4 48 5 45 single sweeps 3 6 SL annotation 3 21 SLOPING LINE softkey 5 45 SOFR command 4 49 softkeys vi I Lou d SAV SAV SAV SAV LOU LLL uu Index 18 FINAL TRIM SIZE 7 5 in x 9 0 in corresponding commands 4 54 SOUR1300 command 4 49 SOURI550 command 4 49 source 300 nm 3 6 550 nm 3 6 external 2 22 3 6 SOURCE 1 TEMPERATURE LOOP OPEN error message 7 9 SOURCE 2 TEMPERATURE LOOP OPEN error message 7 9 SOURCE ARM INPUT connector 2 26 5 45 SOURCE OFF softkey 4 49 5 45 source wavelength 3 6 SOUREXT command 4 49 SOUROFF command 4 49 SPACE softkey 5 46
19. Syntax BEEPWARN ON OFF Equivalent softkey DISPLAY BEEP WARN on off 4 18 FINAL TRIM SIZE 7 5 in x 9 0 in CALD CALE CALM CALFRES CALUSER CBRI Programming Instrument Commands Measures magnitude calibration standard Syntax CALD Equivalent softkey CAL MEASURE STANDARD Exits magnitude calibration before completion Syntax CALE Equivalent softkey CAL EXIT Initiates magnitude calibration Syntax CALM Equivalent softkey CAL CALIBRATE MAGNITUDE Specifies default Fresnel standard as calibration standard Syntax CALFRES Equivalent softkey CAL CALIBRATE MAGNITUDE Specifies user defined standard as calibration standard Syntax CALUSER Equivalent softkey CAL CALIBRATE MAGNITUDE Sets the color brightness in percent See COLO below Syntax CBRI lt value gt Item Description value lo to 100 Equivalent softkey DISPLAY BRIGHTNESS 4 19 FINAL TRIM SIZE 7 5 in x 9 0 in CENT CLEA CLEARALL CLES CLS COLO Programming Instrument Commands Sets the center stimulus value Syntax CENT lt value gt suffix Item Description value Domain dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey MENU CENTER Clear the save recall register 1 5 Syntax CLEA 1 2 3 4 5 Equivalent softkey SAVE CLEAR REG1 5 Clears all five save recall registers Syntax CLEARALL Equivalent softkey SAVE
20. area AS Adjust vector line to be within shaded greg shown 16 Press DONE 17 Remove the low reflection termination 18 Continue with step 2 of To calibrate the magnitude in this section 2 27 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Performing Manual Calibrations To turn off calibration data This procedure does not destroy the calibration data It only prevents its application to the measurement data Turning the calibration on restores the previous calibration 1 Press CAL 2 Press CORRECTION on OFF so that OFF is selected To enter the standard s reflection percentage 1 Press CAL 2 Press CALIBRATE MENU 3 Press USER STD and enter the reflection return loss in dB to be used during magnitude calibrations for your standard 4 To return to the default value press FRESNEL To turn chromatic dispersion correction on and off 1 Press CAL 2 Press CALIBRATE MENU 3 Press DISPER COR on OFF so that OFF is selected 2 28 FINAL TRIM SIZE 7 5 in x 9 0 in CAUTION Performing Guided Setups and Calibrations Performing Manual Calibrations To use the Option 001 cable tray The maximum length of cable that can be coiled inside the tray is approximately 200 cm 79 inches 1 Connect one end of the fiber optic cable to the front panel REFERENCE EXTENSION B connector 2 Coil the cable in the tracy as shown in the fo
21. numbers 7 11 ESB command 4 24 ESE command 4 13 ESE command 4 25 ESNB command 4 25 ESR command 4 9 4 13 ESR command 4 25 event status register 4 9 4 10 excursion peak 3 14 EXIT softkey 4 18 4 19 EXT AM connector 5 22 EXTERNAL softkey 2 22 3 6 4 49 5 23 external source 2 22 3 6 EXTMDATA command 4 25 EXTMFORM command 4 25 EXTMGRAP command 4 25 EXTMRAW command 4 26 EXT REF IN connector 5 22 ext status notation vii 5 22 EXTT command 4 26 EXT TRIGGER connector 5 23 EXT TRIG on OFF softkey 5 22 ail annotation 3 20 FC PC adapter 5 53 bare fiber adapter 5 53 cable part numbers 5 54 fiber iv fiber optic cables cleaning connections 1 21 inspecting 1 22 Index 8 FINAL TRIM SIZE 7 5 in x 9 0 in 1j 4 g 1j Ij Ij Ij Ij 71 1j 1j 1 1j 1j 1 1j oOoooooooo FU use replacing 1 19 RMWARE REVISION softkey 5 24 RST CHARACTER MUST BE A LETTER error message 7 5 ed marker 3 13 XED MKR MENU softkey 5 23 XED MKR POSITION softkey 4 36 5 23 XED MKR VALUE softkey 4 36 5 24 L annotation 3 21 LAT LINE softkey 5 24 M1 command 4 26 M2 command 4 26 M3 command 4 26 M4 command 4 26 M5 command 4 26 MAT ARY on OFF softkey 4 25 5 24 MAT BINARY softkey 5 24 MAT key 3 7 5 24 menu map 5 5 SNEL 14 7 dB softkey 5 25 SNEL 15 dB softkey 5 25 front panel apters 5 53 connectors vi FULL PAGE softkey
22. 0 in Performing Measurements Setting the Measurement Range To select the source wavelength To automatically tune to a response To change the displayed scale To change the refractive index Reducing Displayed Noise To reduce the displayed noise Using Markers To display a peak response To change the measurement range To make relative measurements To position a fixed reference marker To change the peak definition To turn markers off Creating Limit Lines To enter limit line segments To display or hide limit lines To turn on limit testing Tutorial Using Limit Lines Storing Traces to Memory To view memory traces Saving Instrument States to Registers To save to a register To recall a register To increase user memory Saving Instrument States to Files To save to a disk To change a file name To recall an external file To delete an external file To format an external disk To connect a disk drive Changing Colors and Audible Warnings To adjust displayed colors To turn on the warning beep To turn off the done beep Printing and Plotting To print the display To plot the display To print or plot measurement and parameter values Contents 2 FINAL TRIM SIZE 7 5 in x 9 0 in To enter the printer plotter type and address 3 49 To abort a print or plot 3 50 4 Programming Controlling the Instrument 4 4 To select the HP IB mode 4 8 To change the HP IB ad
23. 4 36 B H45 288 SP gt 5 37 BHB 745 Y 288 SP END I1 gol tef S diatur nee CENTER 35 mm 18388 nm n i SPRN Z8 mm The limit line table There are three types of segments sloping line flat line and single point Limit line tables can hold up to 22 segments Sloping Lines SL are drawn as ramps from the previous segment to the next segment line or point Unless terminated by another segment they continue to the far right of the screen Flat Lines FL are drawn as steps from the horizontal position but not vertical location of the previous segment Unless terminated by another segment they continue to the far right of the screen Single Points SP are drawn as carets or V at the indicated position when stand alone When used to terminate a line segment the caret is not drawn 3 21 FINAL TRIM SIZE 7 5 in x 9 0 in Indications of pass fail conditions Limit lines can be shifted Performing Measurements Creating Limit Lines Several indications of pass or fail status are provided when limit testing is on A PASS or FAIL message is displayed at the right of the display e The trace vector leading to any measured point that is out of limits is displayed in a different color It appears normal on a print or plot e The limit fail beeper sounds if it is turned on e An asterisk is shown next to any listed point that is out of limits e A bit is set
24. 45 99 12 88 Finland 358 10 855 2360 France 01 69 82 66 66 Germany 0180 524 6330 ndia 080 34 35788 taly 39 02 9212 2701 reland 01 615 8222 Japan 81 426 56 7832 Korea 82 2 3770 0419 exico 5 258 4826 etherlands 020 547 6463 orway 22 13 57 58 Russia 7 095 797 3830 Spain 34 81 631 1213 Sweden 08 5064 8700 Switzerland 01 735 7200 United Kingdom 01 344 366666 United States and Canada 1800 403 0801 1 29 FINAL TRIM SIZE 7 5 in x 9 0 in Installing FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibra tions This chapter shows you how to perform guided setups guided calibrations and manual calibrations Calibrating the precision reflectometer consists of balancing the receiver and then calibrating the magnitude These two procedures ensure maximum accuracy for your measurements They remove DC offsets and polarization sensitivity They also set a calibrated reference level Guided setups not only calibrate the instrument but they also select the source and display instructions for both pigtailed and non pigtailed devices Manually calibrating the instrument is generally faster that using the guided calibration Display is Calibrated log MAG 18 dB REF 50 dB START mm 1300 nm n STOP 488 mm LI H annote When the instrume
25. 7 4 34 5 29 FINAL TRIM SIZE 7 5 in x 9 0 in Index 11 LINM command 4 34 LINT command 4 34 LIST VALUES softkey 3 49 4 34 5 29 LISV command 4 34 LOAD command 4 34 LOAD FILEI softkey 5 30 LOAD FILE2 softkey 5 30 LOAD FILES softkey 5 30 LOAD FILE4 softkey 5 30 LOAD FILES softkey 5 30 LOAD FROM DISK softkey 4 34 5 30 LOCAL key 4 2 5 30 menu map 5 6 LOG MAG softkey 4 34 LOGM command 4 34 LOWER LIMIT softkey 4 32 5 30 ow level reflections 2 21 ow reflection termination 2 3 part number 5 54 LRN command 4 35 magnitude calibration 2 20 RKBUCK command 4 35 KCENT command 4 35 command 4 35 R 1 softkey 5 32 R 2 softkey 5 32 R 3 softkey 5 32 R 4 softkey 4 35 5 32 R gt AMP OFF softkey 3 22 R AMP OFS softkey 5 31 R gt AMP OFS softkey 4 32 R CENTER softkey 4 35 5 30 R FIXED MKR softkey 4 35 4 38 5 30 R MIDDLE softkey 5 31 R POSITION 4 37 R POSITION softkey 4 37 R POSITION softkey 5 32 R REFERENCE softkey 4 37 5 31 R START softkey 4 38 5 31 ARKER STOP softkey 4 38 5 31 markers 3 12 delta 3 13 fixed 3 13 memory trace 3 13 turning off 3 18 MARKER A SPAN softkey 4 38 5 32 MARKER A START softkey 3 16 A AR AR AR AR AR AR AR AR AR AR AR AR AR AR AR AR AR ZZ22 2222222222224 2422 K K K K K K K K K K K K K K K K K LOL LL OL LH LU LH OLG Loud ou
26. 8 OT ENOUGH SPACE ON DISK FOR STORE 7 8 O VALID MEMORY TRACE 7 8 O VALID STATE IN REGISTER 7 8 ONLY LETTERS AND NUMBERS ARE ALLOWED 7 8 OPTIONAL FUNCTION NOT INSTALLED 7 8 PLOTTER not on not connected wrong addrs 7 8 PLOTTER NOT READY PINCH WHEELS UP 7 9 POWER SUPPLY HOT 7 9 PRINTER not on not connected wrong addrs 7 9 REQUESTED DATA NOT CURRENTLY AVAILABLE 7 9 SOURCE 1 TEMPERATURE LOOP OPEN 7 9 SOURCE 2 TEMPERATURE LOOP OPEN 7 9 SYNTAX ERROR 7 10 SYSTEM IS NOT IN REMOTE 7 10 test cannot execute when source is off 7 10 TEST PORT OVERLOAD REDUCE POWER 7 10 TEST SET NOT FOUND CHECK I O CABLE 7 10 CAUTION messages ASCII MISSING 7 4 CBRI command 4 19 CENT command 4 20 CENTER key 5 16 CENTER softkey 4 20 certification x CHANGE HP IB to SYST CTRL or PASS CTRL error message 7 4 characteristics 6 14 chromatic dispersion 2 22 2 28 CITIfile 3 41 CLEA command 4 20 cleaning adapter 1 24 cabinet 1 2 non lensed connectors 1 23 cleaning fiber optic connections 1 21 1 23 CLEARALL command 4 20 CLEAR ALL softkey 4 20 5 16 CLEAR REG1 5 softkey 4 20 Ga 4 T Index 5 FINAL TRIM SIZE 7 5 in x 9 0 in LEAR REGI softkey 5 17 LEAR REG2 softkey 5 17 LEAR REG3 softkey 5 17 LEAR REGA softkey 5 17 LEAR REGS softkey 5 17 LEAR REGISTER softkey 5 17 LES command 4 20 LS 4 9 command 4 13 CLS command 4 20 COLO comman
27. A limit line appears on the screen at the 0 dB level the top graticule line in this example Press UPPER LIMIT and enter 57 dB Press x1 to terminate the entry This moves the limit line down to 57 dB What looks like one line is actually two limit lines are entered in pairs Enter 55 dB to move the upper limit line up to 55 dB See the following figure 3 27 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Creating Limit Lines 19 16 17 18 DATA log MAG 18 dB REF 5B dB 1 83 336 dB hp 35 mm C UPPER LIMIT 55 dB SEG POSITION 6mm Upper dB Lower dB TYPE gt 1 33 BB 755 57 SL END Bi Ul MA dr en een cern lg CENTER 35 mm 1388 nm n M m SPAM Z8 mm Press LOWER LIMIT and enter a value of 200 dB This forces the lower limit to a low value Press DONE to finish editing the first limit segment Press ADD and then POSITION VALUE and enter a value of 34 mm Press UPPER LIMIT and enter a value of 9 dB Press DONE This ends the first segment at 34 mm 9 dB and starts the second segment at the same place 3 28 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Creating Limit Lines DATA log MAG 18 dB REF 5B dB 1 79 445 dB hp 35 mm C SEG POSITION nmi pear dB Lower dB TYPE 1 33 B 465 288 SL gt 2 34 4h 9 4206 S
28. COLOR RESTORE DISPLAY RIGHT LOWER RIGHT UPPER Gar Reference Keys Softkeys and Connectors Sets the value of the reference line The default value is 50 dB Its range is 200 dB to 200 dB Key Path SCALE REF REFERENCE VALUE Sets the refractive group index number The default and minimum value is 1 and the maximum is 200 The refractive index value is displayed on the bottom of the screen as n 1 Key Path MEAS REFRACTIVE INDEX n Resets the selected screen element to its default color Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS DATA LIMIT LN RESET COLOR Turns off the tabular listing and returns the measurement display to the screen Key Path COPY LIST VALUES RESTORE DISPLAY Key Path COPY OP PARMS MKRS etc RESTORE DISPLAY Draws a quarter page plot in the lower right quadrant of the page Key Path COPY SELECT QUADRANT RIGHT LOWER Draws a quarter page plot in the upper right quadrant of the page Key Path COPY SELECT QUADRANT RIGHT UPPER This menu let you save data to instrument state registers store data to an external disk drive and recall data from either 5 42 FINAL TRIM SIZE 7 5 in x 9 0 in SAVE COLORS SAVE REGn SCALE DIV SCALE PLOT SCALE REF Reference Keys Softkeys and Connectors Saves any screen color modifications These changes are not affected by PRESET but cycling power returns the default settings
29. COPY 4 Press SELECT QUADRANT and select the portion of the printer paper to place the image on 9 Press PRINT PLOT SETUPS and select one of the following STANDARD for a black and white printer COLOR fora color printer 6 Press COPY and then PRINT To plot the display 1 Connect the plotter to the precision reflectometer using an HP IB cable 2 Enter the plotter s address and type as described in To enter the printer plotter type and address in this section 3 Press COPY 4 Press SELECT QUADRANT and select the portion of the plotter paper to place the image on 5 Use the DEFINE PLOT and CONFIGURE PLOT menus to define the plotted image 6 Press COPY and then PLOT 3 48 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Printing and Plotting To print or plot measurement and parameter values 1 Connect the plotter or printer to the precision reflectometer using an HP IB cable 2 Enter the plotter or printer s address and type as described in To enter the printer plotter type and address in this section 3 Press COPY and make one of the following selections LIST VALUES prints or plots a table of all measured stimulus points and their current data values Limit information is included if it is turned on Up to five columns of information are provided The specific information listed for each measured stimulus point varies depending on the display
30. IDN OPC PCB Programming IEEE 488 2 Common Commands Clears the status byte the event status register and the event status register B Syntax CLS Enables specific bits of event status register Query Syntax ESE lt value gt Item Description value 0 to 32767 1215 1 Returns the contents of the standard event status register Syntax ESR Outputs the identification string HEWLETT PACKARD HP 8504B 0 X XX where X XX is the firmware revision Syntax IDN Tells the reflectometer to set bit 0 OPeration Complete bit in the event status register when it completes all pending operations When used in Query form the reflectometer will output a 1 when the operation is complete Its use is enabled by issuing the command OPC or OPC prior to an OPC able command For example issuing OPC SING causes the OPC bit in to be set at the completion of the single sweep Issuing OPC instead causes the reflectometer to output a 1 when the sweep is completed Addressing the reflectometer to talk will then hold HP IB traffic until the sweep is completed and the 1 has been accepted Syntax OPC Sets the HP IB address which the reflectometer uses to communicate with an external controller Syntax PCB lt value gt 4 13 FINAL TRIM SIZE 7 5 in x 9 0 in Programming IEEE 488 2 Common Commands Item Description value lo to 30 default 21 Equivalent softke
31. INPUT connector SOURCE OFF Reference Keys Softkeys and Connectors Takes one sweep of data and returns to the hold mode Key Path MEAS SINGLE Sets the limits at a single stimulus point If limit lines are on the upper limit value of a single point limit is displayed as V and the lower limit is displayed as A A limit test at a single point not terminating a flat or sloped line tests the nearest actual measured data point A single point limit can be used as a termination for a flat line or sloping line limit segment When a single point terminates a sloping line or when it terminates a flat line and has the same limit value as the flat line the single point is not displayed as A or V The indication for a single point segment in the displayed table of limits is SP Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE LIMIT TYPE SINGLE POINT Defines a sloping limit line segment that is linear with distance or time and is continuous to the next stimulus value and limit If a sloping line is the final segment it becomes a flat line terminated at the stimulus stop value A sloping line segment is indicated as SL on the displayed table of limits Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE LIMIT TYPE SLOPING LINE This rear panel connection allows you to use an external source The green fiber optic cable supplies the internal sources and should normally remain connected to this connector Refer to Block Diagram in
32. KOR fe fe ARKBUCK ENU 00P UMG UTPACI UTPDATA UTPERRO UTPFORM WAIT UTPIDEN fe fe fe fe c U U U U UU U U U u 1 meee gt Ax Oooooooooo Ooooo 4 15 FINAL TRIM SIZE 7 5 in x 9 0 in ADDRCONT ADDRDISK ADDRPLOT ADDRPRIN Programming Instrument Commands Sets the HP IB address which the reflectometer uses to communicate with an external controller This command is identical to the PCB command Syntax ADDRCONT 1 lt value gt Item Description value lo to 30 default 21 Equivalent softkey LOCAL ADDRESS CONTROLLER Sets the HP IB address which the reflectometer uses to communicate with an external disk drive Syntax ADDRDISK lt value gt Item Description value lo to 30 default 0 Equivalent softkey LOCAL ADDRESS DISK Sets the HP IB address which the reflectometer uses to communicate with a plotter Syntax ADDRPLOT lt value gt Item Description value lo to 30 default 5 Equivalent softkey LOCAL ADDRESS PLOTTER Sets the HP IB address which the reflectometer uses to communicate with the printer Syntax ADDRPRIN lt value gt 4 16 FINAL TRIM SIZE 7 5 in x 9 0 in AUTO AVERFACT AVERO AVERREST BACI Programming Instrument Commands Item Description value lo to 30 default 1 Equivalent softkey
33. Key Path DISPLAY MORE ADJUST DISPLAY SAVE COLORS Saves memory trace 1 or 2 to an internal register 1 2 3 4 or b The learn string is also saved in non volatile memory Key Path SAVE SAVE REGn Changes the vertical scale s per division value and thus the size of the trace Scale per division is noted at the top edge of the screen for example 10 dB Key Path SCALE REF SCALE DIV Provides two selections for plot scale FULL and GRAT Select FULL as the normal scale selection for plotting on blank paper It includes space for all display annotations such as marker values stimulus values and so forth The entire display fits within the user defined boundaries of P1 and P2 on the plotter while maintaining the same aspect ratio as the display With the selection of GRAT the horizontal and vertical scales are expanded or reduced so that the graticule lower left and upper right corners exactly correspond to the user defined P1 and P2 scaling points on the plotter This is convenient for plotting on preprinted forms To plot on a rectangular preprinted graticule set P1 of the plotter at the lower left corner of the preprinted graticule and set P2 at the upper right corner Key Path coPv DEFINE PLOT SCALE PLOT This key presents a menu that has autoscale functions for easy scaling of data 5 43 FINAL TRIM SIZE 7 5 in x 9 0 in SEGMENT SELECT LETTER SELECT QUADRANT SET ADDRESSES Refere
34. SED EDIT LIMIT LINE EDITLIML EXIT BALE CALE EXT TRIG on OFF EXTT EXTERNAL SOUREXT FIXED MKR ARKFVAL FIXED MKR POSITION ARKFPOS FLAT LINE LIMTFL FORMAT ARRAY on OFF EXTMFORM FORMAT BINARY SAVUBINA FRESNEL CALSFRES FULL PAGE FULP FULL SPAN FULS GRAPHICS ARRAY on OFF EXTMGRAP GRATICULE TEXT COLOGRAT FINAL TRIM SIZE 7 5 in x 9 0 in 4 55 Programming Keys versus Commands Keys versus Commands continued Key Equivalent Programming Command GROUP INDEX In GROI GUIDED CAL GUIC GUIDED SETUP GUIS HORIZ DISTANCE DIST HP IB DIAG on OFF DEBU TIALIZE DISK ID TENSITY TE LEFT LOWER LEFL LEFT UPPER LEFU LIMIT LINE on off LIMILINE LIMIT TEST on off LIMITEST LIN MAG L LINE TYPE DATA LINTDATA LINE TYPE MEMORY LINTMEMO LISTS LISV LOAD HLE1 to FILES LOAD LOWER LIMIT LIML ARKER AMP OFS LIMIMAOF ARKER CENTE ARKCENT ARKER gt FIXED MKR ARKFIXM ARKER gt FIXED MKR ARKFIXM ARKER MIDDLE ARKMIDD ARKER POSITION ARKPOSI ARKER REFERENCE ARKRE ARKER START ARKSTAR ARKER STOP ARKSTOP ARKER 1 to 4 ARK ARKER A SPAN ARKSPAN AX SEARCH AXS AX SEARCH AXS EASURE RESTART REST EASURE STANDARD EASSTAN 4 56 FINAL TRIM SIZE 7 5 in x 9 0 in P
35. This is a IEC Class 1 LED product Do not stare into beam or view directly with optical instruments LED radiation is emitted from the front panel TEST PORT and REFERENCE EXTENSION A connectors If this instrument is not used as specified the protection provided by the equipment could be impaired This instrument must be used in a normal condition in which all means for protection are intact only No operator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock and LED radiation do not remove covers Before switching on this product make sure that the line voltage selector switch is set to the voltage of the power supply and the correct fuse is installed Assure the supply voltage is in the specified range Electrostatic discharge ESD can damage circuits associated with rear panel connectors Therefore before connecting any cable to a rear panel connector momentarily short the center and outer conductors of the cable together Avoid touching the rear panel connectors without first touching the frame of the instrument Be sure that the instrument is properly earth grounded to prevent buildup of static charge This instrument has been designed and tested in accordance with IEC Publication 348 Safety Requirements for Electronic Measuring Apparatus and has been supplied in a safe condition The instruction documentation contains information and warnings which must be followed by the user to ensur
36. an ASCII file from disk the reserved word VAR was not found GPIB error number 105 ASCII MISSING DATA statement In reading an ASCII file from disk the reserved word DATA was not found GPIB error number 106 7 3 FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages Message Definitions ASCII MISSING BEGIN statement In reading an ASCII file from disk the reserved word BEGIN was not found GPIB error number 107 BLOCK INPUT ERROR The reflectometer did not receive a complete data transmission This is usually caused by an interruption of the bus transaction Clear by pressing the LOCAL key or aborting the IO process at the controller GPIB error number 34 BLOCK INPUT LENGTH ERROR The length of the header received by the reflectometer did not agree with the size of the internal array block Refer to the GPIB Programming Guide for instructions on using input commands GPIB error number 35 CHANGE HP IB to SYST CTRL or PASS CTRL A command front panel or GPIB has been received that requests the reflectometer to take control of the GPIB but it is in TALKER LISTENER mode Change selection under LOCAL GPIB error number 36 CORRECTION CONSTANTS NOT STORED The results of a service adjustment have not been stored in the reflectometer GPIB error number 3 DISK HARDWARE PROBLEM The disk drive is properly connected but has returned a service related error message when accessed GPIB error
37. command 4 5 NT softkey 4 51 5 48 TITF command 4 5 L command 4 52 LE1 softkey 5 48 LE2 softkey 5 48 LES softkey 5 48 LE4 softkey 5 48 LES softkey 5 48 LES softkey 4 51 5 49 EGI softkey 5 49 EG2 softkey 5 49 EGS softkey 5 49 EG4 softkey 5 49 EGS softkey 5 49 EGISTER softkey 4 52 5 49 softkey 4 52 5 48 R command 4 52 trace averaging 3 9 data 3 13 3 d 4 d 4 d 4 d 4 d 4 d 4 d 4 d 1j 1j 1j 1j 1j 1j T N dU gs N cJ H G LL Ud Lo uU A HG Go u Index 20 FINAL TRIM SIZE 7 5 in x 9 0 in memory 3 13 3 34 storing 3 34 TRIG command 4 52 TRIGGER HOLD softkey 4 27 5 49 TRIGGER TRIG OFF softkey 4 26 TST command 4 14 two event spatial accuracy 6 9 two event spatial resolution 6 10 A MENU softkey 5 11 A MODE OFF softkey 4 22 A OFF softkey 5 11 A REF 4 softkey 4 22 REF FIXED MKR softkey 5 11 F MKR 1 softkey 5 11 F MKR 2 softkey 5 11 zl iml MKER 3 softkey 5 11 MKER 4 softkey 5 11 A FIXED MKR softkey 4 22 command 4 52 ER LIMIT softkey 4 33 5 49 PASC command 4 52 PASS CONTROL softkey 4 52 5 50 R STD 10 dB softkey 5 50 LOL Lu R R R R R D D S S US SCCCPEPE PP PB mome igo verification 1 11 vertical scale 3 7 VERT LOG MAG softkey 3 7 5 50 VGA connector 5 50 viewing traces 3 34 VOLUME NUMBER softkey 5 50 WAIT command 4
38. do not indicate an error condition In addition to error messages instrument status is indicated by status notations in the left margin of the display Examples are Avg and Hld Sometimes these appear in conjunction with error messages NOTE When displayed error messages are usually preceded with the word CAUTION Message Definitions ea aaa 7 3 Error Message Numbers aaa aaa 7 11 7 2 FINAL TRIM SIZE 7 5 in x 9 0 in Message Definitions Error Messages Message Definitions ADDRESSED TO TALK WITH NOTHING TO SAY An enter command was sent to the reflectometer without first requesting data with an appropriate output command such as OUTPDATA The reflectometer has no data in the output queue to satisfy the request GPIB error number 31 AIR FLOW RESTRICTED CHECK FAN FILTER An inadequate air flow condition has been detected Clean the fan filter For most efficient cooling the instrument covers should be in place If the problem persists troubleshoot the power supply GPIB error number 20 ANOTHER SYSTEM CONTROLLER ON HP IB Selection of SYSTEM CONTROLLER under LOCAL could not be accomplished because another System Controller is already connected on HP IB GPIB error number 37 ASCII MISSING CITIFILE statement In reading an ASCII file from disk the reserved word CITIFILE was not found GPIB error number 104 ASCII MISSING VAR statement In reading
39. e Trace 1 el e Trace 2 el e Calibration Data el Limit lines e 1 This data is erased when the instrument is turned off or is pressed 2 This is factory calibration data and not user calibration data When you save an instrument state to an internal register memory traces are saved in volitile memory and are erased when one of the following events occurs e Instrument power is cycled e is pressed How long will data last in an internal register Instrument states last indefinitely as long as the line power cord supplies power to the instrument The instrument does not have to be turned on If the instrument is unpluged internal registers will provide at least 72 hours of safe data storage 3 37 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Saving Instrument States to Registers To save to a register 1 Press SAVE on the precision reflectometer 2 Pressa SAVE REG softkey to save select a register 3 If you want to use the most recently used file names press COPY FROM FILE TITLE 4 If you want to create a softkey label for the register perform the following steps a Press TITLE REGISTER and then press a TITLE REG softkey to select a register b Enter the filename Turn the front panel knob to position the arrow on a character Then press SELECT LETTER The first letter must be a letter Only letters and numbers are allowed Do not use mathematica
40. graticule of a Cartesian format Syntax REFP lt value gt Item Description value lo to 10 div Equivalent softkey SCALE REF REFERENCE POSITION Recall file titles from disk Requires pass control Syntax REFT Equivalent softkey RECALL READ FILE TITLES 4 45 FINAL TRIM SIZE 7 5 in x 9 0 in REFV RESD REST RIGL RIGU Programming Instrument Commands Changes the value of the reference line moving the measurement trace correspondingly Syntax REFV lt value gt suffix Item Description value Format dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey SCALE REF REFERENCE VALUE Turns off a tabular listing OPEP or LISV and returns the measurement display to the screen Syntax RESD Equivalent softkey COPY RESTORE DISPLAY Aborts the sweep in progress then restarts the measurement Syntax REST Equivalent softkey MEAS MEASURE RESTART Draws a quarter page plot in the lower right quadrant of the page Syntax RIGL Equivalent softkey COPY RIGHT LOWER Draws a quarter page plot in the upper right quadrant of the page Syntax RIGU Equivalent softkey COPY RIGHT UPPER 4 46 FINAL TRIM SIZE 7 5 in x 9 0 in RSCO SADD SAVUASCI SAVUBINA SAVE SCAL Programming Instrument Commands Resets the modified colors to the default colors Syntax RSCO Equivalent softkey DISPLAY RESET COLOR Adds a
41. is nearly independent of mirror position when using the 1300 nm source log MAG 10 dB REF 58 dB op 0 START mm 1300 nm n i STOP 400 mm Noise floor with 1300 nm source For the 1550 nm source with dispersion correction enabled the measurement noise floor depends on the mirror position The noise floor at a mirror position of 400 mm is approximately 5 dB higher than at a mirror position of 0 mm The noise floor for all mirror positions can be substantially lowered by narrowing the measurement span log MAG 10 dB REF 58 dB s op o START mm 1559 nm n l STOP 400 mm Noise floor with 1550 nm source FINAL TRIM SIZE 7 5 in x 9 0 in Regulatory Information Notice for Germany Noise Declaration LpA lt 70 dB am Arbeitsplatz operator position normaler Betrieb normal operation nach DIN 45635 T 19 per ISO 7779 6 16 FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information DECLARATION OF CONFORMITY According to ISO IEC Guide 22 and CEN CENELEC EN 45014 Manufacturer s Name Agilent Technologies Inc Manufacturer s Address 1400 Fountaingrove Parkway Santa Rosa CA 95403 1799 USA Declares that the product Product Name Precision Reflectometer Model Number 8504B Product Options This d
42. marker to set the middle magnitude value of a limit segment Move the marker to the desired value or device specification and press this key to make that value the midpoint of the delta limits The limits are automatically set an equal amount above and below the marker Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE EDIT MARKER MIDDLE 5 31 FINAL TRIM SIZE 7 5 in x 9 0 in MARKER gt POSITION MARKER n MARKER A SPAN MAX SEARCH Reference Keys Softkeys and Connectors Sets the starting stimulus value of a segment using the active marker Move the marker to the desired starting stimulus value before pressing this key and the marker stimulus value is entered as the segment start value Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE EDIT MARKER POSITION Turns on marker 1 2 3 or 4 and makes it the active marker The active marker appears on the display as the V symbol The active marker s distance or time value as well as its amplitude are displayed in the active entry area The horizontal position can be controlled with the front panel knob the number pad or the step keys The step keys move the marker in one division increments on the graticle The marker amplitude and distance or time values are also displayed in the upper right hand corner of the screen If another marker key is pressed the original marker becomes inactive and is represented on the screen as the A symbol Only the most
43. marker to the maximum point on the trace This command is identical to the MARKMAXI command Syntax MAXS Equivalent softkey MKR FCTN MAX SEARCH 4 38 FINAL TRIM SIZE 7 5 in x 9 0 in MEAR MEASSTAN MEMO MENU MENUON MENUOFF NEXP Programming Instrument Commands Aborts the sweep in progress then restarts the measurement Syntax MEAR or REST Equivalent softkey MEAS MEASURE RESTART Measures magnitude calibration standard Syntax MEASSTAN Equivalent softkey CAL MEASURE STANDARD Select Memory 1 or Memory 2 as the current memory Syntax MEMO 1 2 Equivalent softkey DISPLAY MEMORY 1 and MEMORY 2 Specify display of the top level menu for each of the hard keys Must be preceded by the MENUON command Syntax MENU AVG CAL COPY DISP FORM MARK MEAS MRKF RECA SAVE SCAL STIM SYST Turns on the display of the current menu Must precede the display of a particular menu Syntax MENUON Turns off the display of the current menu Syntax MENUOFF Displays the next page of information in a tabular listing onto the display Syntax NEXP Equivalent softkey COPY NEXT PAGE 4 39 FINAL TRIM SIZE 7 5 in x 9 0 in NOOP NUMG OPC OPEP OUTPACTI OUTPDATA OUTPERRO Programming Instrument Commands The no operation command Syntax NOOP Triggers a user specified number of sweeps and returns to the hold mode Syntax NUMG lt value gt
44. mm 90 3 mm AREF4F IXED AREF AF IXED ay o laj 888i dE 9 mm 9 mm 138 mm 40 048 dB Return to full span with the press of a key L START mm 1308 nm n 1 STOP 400 mm START mm 1300 nm nz1 44 STOP 277 6 Tm Refraction index 1 Refraction index 1 44 The precision reflectometer is designed so that if the lengths of the REFERENCE EXTENSION and TEST PORT cables are equal the first response appears approximately one division to the right of the display s left edge in a 400 mm span This response is reflected from the end of theTEST PORT cable For every 28 millimeters that the TEST PORT cable is longer than the REFERENCE EXTENSION cable this response moves one division towards the right Twenty eight millimeters of actual fiber length has an equivalent air length of 40 mm You can return the instrument to the full 400 nm span at any time by pressing MENU FULL SPAN Next to the FULL SPAN key you ll find the ZERO SPAN on OFF softkey This softkey make the precision reflectometer into what is essentially a programmable delay line It sets the center setting to the former start value and stops the sweep mirror movement 3 5 FINAL TRIM SIZE 7 5 in x 9 0 in The sweep can be stopped External sources can be used Performing Measurements Setting the Measurement Range Normall
45. new segment to the limit line table Syntax SADD Equivalent softkey SYSTEM ADD Stores appropriate files to disk as ASCII files CITIFile Only specific data files are formatted as CITIFile the instrument state file and others are always stored as binary Syntax SAVUASCI Equivalent softkey SAVE STORE TO DISK DEFINE STORE DISK FILE FORMAT Stores appropriate files to disk as binary files Syntax SAVUBINA Equivalent softkey SAVE STORE TO DISK DEFINE STORE DISK FILE FORMAT Save the current instrument state in internal register 1 2 3 4 or 5 Syntax SAVE 1 21314 5 Changes the response value scale per division of the graticule Syntax SCAL lt value gt suffix Item Description value Format dependent suffix DB MM UM NM S MS US NS PS FS 4 47 FINAL TRIM SIZE 7 5 in x 9 0 in SCAP SDEL SDON SEDI SING Programming Instrument Commands Equivalent softkey SCALE REF SCALE DIV Selects the normal full size scale for plotting or a plot where the graticule is expanded to P1 and P2 of the plotter Syntax SCAP FULL GRAT Equivalent softkey COPY SCALE PLOT Deletes a segment from the limit line table Syntax SDEL Equivalent softkey SYSTEM DELETE Completes editing the limit table Syntax SDON Equivalent softkey SYSTEM DONE Determines a segment of the limit line table Syntax SEDI lt value gt Item Description valu
46. number 39 DISK IS WRITE PROTECTED The write protect feature on a disk has been enabled GPIB error number 48 7 4 FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages Message Definitions DISK MEDIUM NOT INITIALIZED The floppy disk must be initialized in order to store files Perform an initialization INITIALIZE DISK under SAVE STORE TO DISK DEFINE INIT PURGE GPIB error number 40 DISK MESSAGE LENGTH ERROR The number of bytes transferred to or from the disk is inconsistent with the number specified in the previously sent disk command GPIB error number 19 DISK WEAR REPLACE DISK SOON The floppy disk surface is wearing out replace with a new disk to prevent data loss GPIB error number 49 DISK not on not connected wrong addrs The disk drive does not respond to control Verify power to the disk drive and check the GPIB connection between the reflectometer and the disk drive Ensure that the disk address recognized by the reflectometer matches the GPIB address set on the disk drive itself GPIB error number 38 FIRST CHARACTER MUST BE A LETTER When titling a register or file the first character must be a letter Rename the register file appropriately GPIB error number 42 FUNCTION NOT VALID The requested function is incompatible with the current instrument state GPIB error number 14 ILLEGAL UNIT OR VOLUME NUMBER The disk unit or volume number set in the reflectometer is not valid Refer to the d
47. pellets do not adequately cushion the instrument do not prevent all instrument movement and can generate static electricity CAUTION 1 26 FINAL TRIM SIZE 7 5 in x 9 0 in Installing Returning Your Instrument To return the instrument for service 1 Fill out the repair form located on the next page and place it in the box with the instrument Send a copy of any noted error messages or other helpful performance data 2 To help prevent damage during transit pack the instrument in the factory packaging materials Although the original shipping materials or equivalents are best the following instructions result in acceptable packaging a Wrap the instrument in anti static plastic to reduce the possibility of b ESD damage For instruments that weigh less than 54 kg 120 Ib use a double walled corrugated cardboard carton of 159 kg 350 Ib test strength The carton must be both large enough and strong enough to accommodate the instrument Allow at least three to four inches on all sides of the instrument for packing material Surround the equipment with three to four inches of packing material to protect the module and to prevent movement in the carton If packing foam is not available the best alternative is S D 240 Air Cap from Sealed Air Corporation Hayward California 94545 Air Cap is plastic sheeting filled with 1 1 4 inch air bubbles Use pink anti static Air Cap Wrapping the instrument sever
48. polarization independent 1 Calibrate the reference balance as described in To balance the receiver 2 If you plan to measure a device that has a pigtail connect a fiber optic cable to the TEST PORT This cable must be equal to the length of the cable that is attached to the REFERENCE EXTENSION connectors 3 Press and then CALIBRATE MENU 4 Press CALIBRATE MAGNITUDE 5 Select a standard e Press FRESNEL to select the standard default value Press USER STD to use your own standard Enter the reflection return loss in dB of your standard The sweep can be at any position The Fresnel value listed is the percentage of reflectance of the open end of the fiber optic cable 6 Wait until the asterisk on the display s left hand side disappears and the letter C remains below the asterisk You should see a Fresnel response on the display due to a reflection from the end of the TEST PORT cable 2 25 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Performing Manual Calibrations To calibrate for an external source 1 On the lightwave section s rear panel locate the cover plate that is just left of the I O INTERCONNECT cable Turn the two thumbscrews to remove the cover plate Disconnect the green fiber optic cable and put a protective cap on it Turn the external source off oo FB CQ N Connect a fiber optic cable from your external source to the SOURCE ARM IN
49. recently selected marker is active Key Path MKR MARKER n Changes the start and stop distance or time parameters to the values of the active marker and the delta reference markers respectively Key Path MKR FCTN M RKER A SPAN Places the marker on the displayed data point having the greatest amplitude value With delta markers the marker is placed on the data point having the greatest amplitude value The function does not search for the greatest amplitude data point repeatedly it searches once each time the MAX SEARCH key is pressed Key Path MKR FCTN M X SEARCH Key Path MKR FCTN PEAK SEARCH MAX SEARCH 5 32 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Keys Softkeys and Connectors This key presents a menu that allows you to set the index of refraction 7 MEASURE RESTART MEASURE STANDARD MEMORY MEMORY 1 and access trigger functions If the instrument times out and stops sweeping press the MEASURE RESTART softkey This softkey resets averaging to 0 zero and performs one of two actions e If the instrument is sweeping it stops the current sweep and starts a new Sweep e If the instrument is not sweeping in hold mode it starts a single sweep Key Path MEAS MEASURE RESTART During calibrations this softkey starts the magnitude calibration Key Path CAL CALIBRATE MENU CALIBRATE MAGNITUDE MEASURE STANDARD Displays the active trace memory 1 or 2 Key Path
50. require no units terminator G n Terminates numeric keypad entries with 10 multiplier Me Terminates numeric keypad entries with 10 5 multiplier K m Terminates numeric keypad entries with 107 multiplier x1 Terminates unitless entries such as averaging factors ENTRY OFF Disables the keypad knob and step keys until another function is selected vili FINAL TRIM SIZE 7 5 in x 9 0 in CAUTION WARNING Safety Symbols The following safety symbols are used throughout this manual Familiarize yourself with each of the symbols and its meaning before operating this instrument The caution sign denotes a hazard to the instrument It calls attention to a procedure which if not correctly performed or adhered to could result in damage to or destruction of the instrument Do not proceed beyond a caution sign until the indicated conditions are fully understood and met The warning sign denotes a life threatening hazard It calls attention to a procedure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning sign until the indicated conditions are fully understood and met Instruction The instruction manual symbol The product is marked with this symbol when it is Manual ecessary for the user to refer to the instructions in the manual The line power on symbol Q The line power off symbol CE The CE mark is a registered
51. span 2 5 3 5 SPAN command 4 49 SPAN key 5 46 SP annotation 3 21 SPAN softkey 4 50 spurious responses 6 12 SRE 4 9 SRE command 4 14 SRE command 4 50 ST adapter 5 53 standards 2 20 STAR command 4 50 START key 5 46 START softkey 4 50 status byte 4 9 HP IB 4 2 instrument 4 9 reporting registers 4 10 status notation vii 5 11 STB 4 9 STB command 4 14 STB command 4 50 STOP command 4 50 STOP key 5 46 STOP softkey 4 50 STOR command 4 50 STORE FILE1 softkey 5 46 STORE FILE2 softkey 5 46 STORE FILES softkey 5 46 STORE FILE4 softkey 5 46 STORE FILES softkey 5 46 STORE TO DISK softkey 4 45 4 50 5 47 storing traces 3 34 FINAL TRIM SIZE 7 5 in x 9 0 in Index 19 SVCO command 4 51 sweep restarting 3 6 single 3 6 speed 3 4 sweep to sweep repeatability 6 8 SYNTAX ERROR error message 7 10 system controller 4 4 SYSTEM CONTROLLER softkey 3 44 5 47 SYSTEM IS NOT IN REMOTE error message 7 10 SYST key menu map 5 8 SYSTEM key 5 47 emo talker listener 4 4 TALKER LISTENER softkey 5 47 TALKER LISTER softkey 4 51 TALKLIST command 4 51 termination low reflection 2 3 test cannot execute when source is off error message 7 10 TEST PORT connector 5 48 EST PORT OVERLOAD REDUCE POWER error message 7 10 EST SET NOT FOUND CHECK I O CABLE error message 7 10 EXT softkey 4 21 5 48 inkJet 3 47 ME command 4 5 ME softkey 3 7 5 48 NT
52. uuu Index 12 FINAL TRIM SIZE 7 5 in x 9 0 in KER A STOP softkey 3 16 KFIXM command 4 35 KFPOS command 4 36 KFVAL command 4 36 KMAXI command 4 36 KMIDD command 4 36 KOFF command 4 37 P command 4 37 POSI command 4 37 PTRA command 4 37 REF command 4 37 KSPAN command 4 38 KSTAR command 4 38 KSTOP command 4 38 KZERO command 4 38 KZOOM command 4 38 AXS command 4 38 AX SEARCH softkey 3 7 4 36 4 38 5 32 EAR command 4 39 EAS key 5 33 menu map 5 8 MEASSTAN command 4 39 measurement lists of data values 3 49 setting range 3 4 units 3 7 measurement noise floor 6 15 EASURE RESTART softkey 3 6 4 39 4 46 5 33 EASURE STANDARD softkey 4 19 4 39 5 33 MO command 4 39 mory 1 3 34 MORY 1 softkey 5 33 mory 2 3 34 ORY 2 REF LINE softkey 5 34 ORY 2 softkey 4 39 5 34 ORY softkey 4 24 5 33 mory trace 3 13 3 37 3 45 U command 4 39 U key 2 26 3 6 5 34 enu map 5 9 UOFF command 4 39 UON command 4 39 DLE VALUE softkey 4 33 4 36 5 34 FCTN key 3 13 3 17 5 34 menu map 5 9 KR key 5 34 menu map 5 9 MKR VALUE ON off softkey 5 34 MKR ZOOM softkey 3 7 5 35 K K K K A A A A A A A A A A A A A A A A R R R R R R R R R R R R R R R R lim tun uo EG z295 27272793275222 D D Z 2 2z 2 lies t n aS E z FINAL TRIM SIZE 7 5 in x 9 0 in Index 13 ODIFY COLORS softkey 5 35 OTO
53. 0 165 40 100 315 340 40 100 175 50 175 50 325 350 50 175 65 190 40 125 340 365 40 125 175 75 200 75 350 375 75 100 175 90 215 40 150 365 390 40 150 175 200 225 50 150 375 400 50 150 175 215 240 40 175 1 Lengths are in centimeters 2 Standard length cables from Option 001 accessory kit Lengths are in centimeters 7 Connect the cables assembled in the preceding step between front panel REFERENCE EXTENSION connectors A and B If you have an Option 001 accessory kit you can stabilize the cable with the cable tray Coil the cable around as necessary If you are using more than one cable place the mid connectors in the wide part of the slot Let the ends of the cable protrude from the tray Be sure to place the cover on the tray 8 Connect your device to the front panel TEST PORT Check setup 9 Press CHECK SETUP 10 Wait for one full measurement sweep to complete 2 8 FINAL TRIM SIZE 7 5 in x 9 0 in Connect termination Performing Guided Setups and Calibrations Running Guided Setups and Calibrations DATA lag MAG 10 dB REF 58 dB TART 8 mm 1300 nm n l STOP 400 mm 11 If a response is not visible perform the following steps 12 13 14 15 a b a0 Press CAL CALIBRATE MENU and then BALANCE RECEIVER Follow the prompts
54. 3 To clean an adapter 2 0 0 6 eee tenet ee 1 24 To test insertion loss 2 00 0 aka ko 1 24 To test return loss 2 0 au 1 25 Returning Your Instrument eo 1 26 To return the instrument for service aaa 1 27 Agilent Technologies Sales and Service Offices 000205 1 29 1 3 FINAL TRIM SIZE 7 5 in x 9 0 in Step 1 Inspect the shipment e Verify that all system components ordered have arrived by comparing the shipping forms to the original system purchase order Inspect all shipping containers If your shipment is damaged or incomplete save the packing materials and notify both the shipping carrier and the nearest Agilent Technologies sales and service office Agilent will arrange for repair or replacement of damaged or incomplete shipments without waiting for a settlement from the transportation company Notify the customer engineer of any problems Precision Reflectometer Accessories Item Quantity Standard Wood box 100 cm FC PC fiber optic cable 2 Fiber optic cable adapter Low reflection termination Cotton swabs Tape measure 13 m Rear panel BNC cable Rear panel 10 INTERCONNECT cable Rear panel line power cable Option 001 Accessory Kit Cable tray Fiber optic cable adapter 40 cm FC PC fiber optic cab 50 cm FC PC fiber optic cab 75 cm FC PC fiber optic cab o o o 20 cm FC PC fiber optic c
55. 34 57 mm 1366 nm n l SPAN 1 mm Two responses viewed as a single signal 20 Press MEAS and then TRIGGER HOLD to freeze the trace 21 Press MKR FCTN MAX SEARCH and then MARKER FIXED MKR to turn on the delta marker and to reference the fixed marker to zero on one of the peaks 22 Turn the front panel knob to center the marker on the other peak 23 The displayed spatial resolution shown in the marker area should be less than the following values 1300 nm source aaa aaa kaaa aa kaaa ee 0 025 mm 1550 nm source ccc cece aaa e 0 25 mm 1 17 FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 5 Verify Operation log MAG 18 dB REF 5B dB la 60894 dB hp H15 mm A AREF SF IZED C MARKER 1 FIXED MKR i B15 mm 8894 dB HI d priv al Sri CENTER 34 663 mm 13880 nm n l SPAN 2 mm Delta marker showing spatial resolution 24 Press PRESET 25 Press and then 1550 nm 26 Remove the coupling adapter from the fiber optic cable and repeat this procedure from step 7 to check the operation at 1550 nm FINAL TRIM SIZE 7 5 in x 9 0 in To replace the line fuse Display Processor Voltage Selector Switches Lightwave Section kentis e To change the fuse on the display processor section 1 Disconnect the line power cord from the display processor section 2 Use a small flat blade screwdri
56. 4 27 5 25 FULL softkey 5 43 FULL SPAN softkey 3 5 4 27 5 25 ULP command 4 27 ULS command 4 27 CTION NOT VALID error message 7 5 GRAPHICS on OFF softkey 4 25 5 26 graticule 3 45 GRATICULE TEXT softkey 5 26 GROI command 4 27 GU IC command 4 27 guided calibration vi 2 6 GU IDED CAL softkey 1 13 2 18 4 27 5 26 guided setup vi non pigtailed device 2 13 igtailed device 2 7 guided setups 2 6 GU GU IDED SETUP softkey 5 26 IS command 4 27 FINAL TRIM SIZE 7 5 in x 9 0 in Index 9 I i utu Eo ard copy results 3 47 Hld status notation vii 5 26 HOLD command 4 27 HORIZ DISTANCE softkey 5 26 HORIZ DISTANCE softkey 4 24 orizontal axis 5 26 orizontal scale 3 5 HP IB addresses 4 4 connector 5 27 modes 4 4 status 4 2 HP IB DIAG on OFF softkey 4 5 4 22 5 27 DN command 4 13 command 4 28 Class iii E 488 2 common commands 4 12 EGAL UNIT OR VOLUME NUMBER error message 7 5 ME softkey 4 51 DEREFR command 4 28 index matching compounds 1 21 index matching gel 1 21 D command 4 28 T DISK YES softkey 5 27 TIALIZATION FAILED error message 7 6 TIALIZE DISK softkey 4 28 5 27 PUDATA command 4 28 PUFORM command 4 28 PULEAS command 4 29 PURAW1 command 4 29 PUT ATTEMPTED WITHOUT SELECTING INPUT TYPE error message 7 6 input connector 1 21 5 41 insp
57. 4 40 UTPERRO command 4 40 UTPFORM command 4 41 UTPIDEN command 4 41 UTPKEY command 4 41 oooooo Index 14 FINAL TRIM SIZE 7 5 in x 9 0 in O OVL s D U U U U U U U U U U U U o do Domi ooooooooooQ C ac ar eak command 4 43 defining 3 13 excursion 3 14 response 3 13 threshold 3 15 threshold 3 14 EAK SEARCH so N command 4 NUM GRATIC NUM MARKE LOS command 4 U U U U U LOT MEM ON off NUM MEMORY NUM TEXT sofi ailed device 2 7 ailed devices 2 2 LOT command 4 44 LOT DATA ON off softkey 5 37 LOT GRAT ON off softkey 5 38 44 0 SQ PLEAS command 4 41 PLIMF command 4 41 PLIML command 4 41 PLIMM command 4 41 UTPMARK command 4 42 PMEMO command 4 42 PPLOT command 4 42 PPRIN command 4 42 PRAW1 command 4 42 UTPTITL command 4 42 output connector 5 41 5 48 TPUT TO AUX INPUT connector 5 36 atus notation vii 5 36 kaging materials 1 26 PaintJet 3 47 numbers 5 54 ass annotation 3 20 ass control 4 4 ass fail testing 3 19 PCB command 4 13 PCB command 4 42 EAKEXCU command 4 43 EAK EXCURSION softkey 3 17 4 43 5 36 tkey 3 17 5 36 EAKTHRE command 4 43 EAK THRESHOLD softkey 3 17 4 43 5 36 EAK TRACK on OFF softkey 4 37 5 36 43 NUM DATA softkey 5 37 ULE softkey 5 37 R softkey 5 37 softkey 5 37 key 5 37 tkey 5 38 FINAL TRIM S
58. 4 6 FINAL TRIM SIZE 7 5 in x 9 0 in Use suffixes to specify units Programming Controlling the Instrument The following suffixes can be used as units If no suffix is used the precision reflectometer assumes the default values for the instruction Upper and lower case characters are equivalent Distance 0 0 a MM UM microns NM Return LOSS 00 0 ee ee eene DB Time 00 000 S default MS US microseconds NS PS FS EN How command names are determined The HP IB Commands are derived from their front panel key titles where possible according to the naming conventions below Some commands require arguments for example on off 1 2 Where possible the 8504 reflectometer commands are compatible with 8702 and 8703 lightwave component analyzer commands HP IB Command Naming Convention Example Convention Letters Used in Command Key Title HP IB Code One word First four letters CORRECTION CORR Two words First three letters of first word and first letter ZERO SPAN ZERS of second word MAX SEARCH MAXS Two words in a group First four letters of both MARKER CENTER MARKCENT 4 7 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Controlling the Instrument To select the HP IB mode 1 Press LOCAL 2 Press one of the following softkeys SYSTEM CONTROLLER TALKER LISTENER or USE PASS CONTROL To change the HP IB address 1 Press LOCAL 2 Press
59. 53 WARNING softkey 5 51 warning text 3 45 warranty xi xl key 5 51 ZERO SPAN on OFF softkey 3 5 4 53 5 51 ZERS command 4 53 zoom 3 4 FINAL TRIM SIZE 7 5 in x 9 0 in Index 21 FINAL TRIM SIZE 7 5 in x 9 0 in
60. 7 5 in x 9 0 in LOAD FILEn Goca LOAD FROM DISK LOWER LIMIT MARKER CENTER MARKER FIXED MKR Reference Keys Softkeys and Connectors Restores the instrument state contained in file 1 2 3 4 or 5 The current instrument state is overwritten Key Path RECALL LOAD FROM DISK LOAD FILEn Presents menus for setting HP IB addresses and selecting the HP IB operating mode During HP IB control pressing this key returns local control of the instrument so that it responds to front panel control Accesses a menu that is used to restore instrument states previously stored to disk Key Path RECALL LOAD FROM DISK Sets the lower limit response value for the start of the segment If an upper limit is specified a lower limit must also be defined If no lower limit is required for a particular measurement force the lower limit value out of range for example 200 dB Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE EDIT LOWER LIMIT Changes the distance or time center value to the value of the active marker and centers the span about that value Key Path MKR FCTN MARKER CENTER Causes a fixed marker to be placed at the position of the active marker Any active marker on the screen shows the difference in values between itself and this active marker Marker readings in the screen s top right corner are in distance or time and amplitude values Also displayed in the top right corner is the notat
61. AL SET ADDRESSES ADDRESS DISK Enters the HP IB address of the precision reflectometer There is no physical address switch Key Path LOCAL SET ADDRESSES ADDRESS HP8504 Enters the HP IB address that the precision reflectometer uses to communicate with a plotter Key Path LOCAL SET ADDRESSES ADDRESS PLOTTER 5 12 FINAL TRIM SIZE 7 5 in x 9 0 in ADDRESS PRINTER ADJUST DISPLAY al OFF AMPLITUDE OFFSET ASCII Reference Keys Softkeys and Connectors Enters the HP IB address that the precision reflectometer uses to communicate with a printer Key Path LOCAL SET ADDRESSES ADDRESS PRINTER Accesses a menu that allows you to change the colors and intensity of the display Key Path DISPLAY MORE ADJUST DISPLAY Turns off all the markers including the delta reference marker and the fixed marker This softkey also turns off peak tracking Key Path MKR all OFF Moves limit lines vertically by adding or subtracting an offset in amplitude value This allows limit lines already defined to be used for testing at a different response level For example if attenuation is added to or removed from a test setup the limit lines can be offset an equal amount Key Path SYSTEM LIMIT MENU LIMIT LINE OFFSETS AMPLITUDE OFFSET Selects an ASCII data format known as CITIfile common instrumentation transfer and interchange file This ASCII data format is useful when data will b
62. B error number 97 MOTOR STOPPED POSITIVE LIMIT Positive position limit exceeded Press the PRESET key If error persists contact your Agilent Technologies Service Center GPIB error number 96 MOTOR TRAJECTORY ERROR Initialization of motor position failed Press the PRESET key If error persists contact your Agilent Technologies Service Center GPIB error number 100 NO DISK MEDIUM IN DRIVE No disk was found in the current disk unit Insert a disk or check the disk unit number stored in the reflectometer GPIB error number 41 NO FILE S FOUND ON DISK No files of the type created by the reflectometer store operation were found on the disk GPIB error number 45 NO MARKER DELTA SPAN NOT SET The MARKER D gt SPAN softkey function requires that delta marker mode be turned on with at least two markers displayed GPIB error number 15 NO SIGNAL CHECK BNC CABLE ON REAR PANEL The signal level at the display processor rear panel AUX INPUT BNC connector is not at the expected value This may be due to a faulty BNC cable connection between the display processor and the lightwave section GPIB error number 109 7 7 FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages Message Definitions NO SOURCE FOUND CHECK POWER TO TEST SET AC mains power is not reaching the lightwave section or the reflectometer has no installed source GPIB error number 103 NO VALID MEMORY TRACE A request to display a memory or trace mat
63. BRATE MENU DISPER COR on OFF Provides functions for selecting the type of data displayed and how that data is displayed Displays the current data trace It is the default display Key Path DISPLAY DISPLAY DATA Displays the edit segment menu which is used to define or modify the stimulus value and limit values of a specified segment If the table was empty a default segment is displayed The default segment is a sloping line with zero limits and stimulus values that vary according to the current stimulus mode distance or time Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE EDIT 5 21 FINAL TRIM SIZE 7 5 in x 9 0 in EDIT LIMIT LINE ENTRY OFF ERASE TITLE ext status notation EXT AM connector EXT REF IN connector EXT TRIG on OFF Reference Keys Softkeys and Connectors Displays the table of limit lines on the screen so that the segments can be seen or changed Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE Prevents accidental changes to the active function After this key is pressed turning the front panel data entry knob will not change any parameters Deletes the entire title and the hp logo Key Path DISPLAY TITLE ERASE TITLE Key Path SAVE TITLE REGISTER TITLE REGn ERASE TITLE Key Path SAVE STORE TO DISK TITLE FILES TITLE FILEn ERASE TITLE Indicates that the precision reflectometer is waiting for an external trigger at the rear panel This rear pa
64. DISK RETURN RETURN DONE STORE FILE1 DATA ARRAY on OFF FORMAT BINARY INIT DISK YES STORE FILE2 RAW ARRAY on OFF ASCII NO STORE FILES FORMAT ARY on OFF STORE FILE4 GRAPHICS on OFF STORE FILES DISK FILE FORMAT DEFINE STORE TITLE FILES RETURN INITIALIZE DISK PURGE FILES RETURN RETURN TITLE FILET SELECT LETTER PURGE FILE1 TITLE FILE2 PURGE FILE2 TITLE FILES SPACE PURGE FILES TITLE FILE4 PURGE FILE4 TITLE FILES BACK SPACE PURGE FILES ERASE TITLE COPY FROM REG TITLES RETURN READ FILE TITLES DONE RETURN 1 This softkey appears only when information is saved to the register savemenu 5 7 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Menu Maps SYSTEM GUIDED SETUP LIMIT LINE on OFF SEGMENT LIMIT TEST on OFF BEEP FAIL on OFF EDIT DELETE ADD LIMIT MENU EDIT LIMIT LINE LIMIT TYPE DONE FIRMWARE REVISION LIMIT LINE OFFSETS SERVICE MENU RETURN RETURN MEAS MEASURE RESTART REFRACTIVE INDEX n TRIGGER HOLD SINGLE CONTINUOUS EXT TRIG on OFF POSITION OFFSET AMPLITUDE OFFSET MARKER gt AMP OFS POSITION VALUE MARKER gt POSITION UPPER LIMIT LOWER LIMIT DELTA LIMITS MIDDLE VALUE MARKER gt MIDDLE DONE SLOPING LINE FLAT LINE SINGLE POINT RETURN systemm measmenu 5 8 FINAL TRIM SIZE 7 5 in x 9 0 in MKR MARKER all OFF A MENU MARKER MKR VALUES ON off Refere
65. EAK THRESHOLD and enter the value below which nothing will be considered a peak 3 17 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Using Markers To turn markers off 1 Press MKR 2 Press all OFF 3 18 FINAL TRIM SIZE 7 5 in x 9 0 in Creating Limit Lines Limit lines allow you to test the shape of displayed responses Limit testing compares the measured data with the defined limits and provides pass or fail information for each measured data point Because limit lines allow you to perform repetitive testing of response shapes they are ideal for pass fail testing on production lines The tutorial at the end of this section provides an excellent method of learning about limit lines It takes only a few minutes to complete Press SYSTEM and then LIMIT MENU to access limit line functions Limit lines consist of segments which are entered in tabular form in limit line tables Each segment has an upper and lower limit The lower limits in the following figure are at 200 dB and so are off the displayed scale Flat Line Single Point DATA Ila G 18 dB REF S dB 1i 84 8072 dB hp 35 mm BE L nam CENTER 35 mm 1388 nm n 1 SPAN 2B mm tutorll 3 19 FINAL TRIM SIZE 7 5 in x 9 0 in Entering limit lines is easy Performing Measurements Creating Limit Lines If limit lines are turned on e The
66. ELO DELR DELRFIXM Programming Instrument Commands Stores the corrected data to trace memory Syntax DATI Equivalent softkey DISPLAY DATA MEM Turns the HP IB command debug mode on or off When on the commands are scrolled through the top portion of the display Syntax DEBU ON OFF Equivalent softkey LOCAL HP IB DIAG on OFF Returns all traces lines and text to the default colors Syntax DEFC Equivalent softkey LOCAL DEFAULT COLORS Sets the delta marker mode off Syntax DELO Equivalent softkey MKR A MODE OFF Sets the indicated marker as the delta reference Syntax DELR 1 2 3 4 Equivalent softkey MKR A REF 1 to A REF 4 Sets the user specified fixed marker as the delta reference Syntax DELRFIXM Equivalent softkey MKR AREF A FIXED MKR 4 22 FINAL TRIM SIZE 7 5 in x 9 0 in DFLT DISKUNIT DISK VOLU DISM DISPCOR DISPDATA Programming Instrument Commands Returns the plotting parameters to the default values Syntax DFLT Equivalent softkey COPY PRINT PLOT SETUPS DEFAULT SETUP Specifies the disc unit in a multiple disk drive for disk store load For example in a two floppy disk drive the left hand drive is unit number 0 the right hand is unit number 1 Syntax DISKUNIT lt unit number gt Equivalent softkey LOCAL DISK UNIT NUMBER Specifies the volume number in a disk drive that allows multiple volumes for disk store load Syntax DISK
67. FSETS LIMIT LINE on OFF LIMIT MENU LIMIT TEST on OFF Reference Keys Softkeys and Connectors This rear panel connection is located on both the lightwave and display processor sections It provides essential signal interconnection lines between the instrument sections Draws a quarter page plot in the lower left quadrant of the page Key Path COPY SELECT QUADRANT LEFT LOWER Draws a quarter page plot in the upper left quadrant of the page Key Path COPY SELECT QUADRANT LEFT UPPER Leads to the offset limits menu which is used to offset all limit lines set by a user defined amount Key Path SYSTEM LIMIT MENU LIMIT LINE OFFSETS Turns limit lines on or off When on defined limit lines are displayed on the screen for visual comparison with the measured data Key Path SYSTEM LIMIT MENU LIMIT LINE on OFF Presents a menu for creating limit lines Limit lines can be used for pass fail testing of devices Key Path SYSTEM LIMIT MENU Turns limit line testing on or off When limit line testing is on the data is compared with the defined limits at each measured point Limit tests occur at the end of each sweep whenever the data is updated when formatted data is changed and when limit testing is first turned on Key Path SYSTEM LIMIT MENU LIMIT TEST on OFF 5 28 FINAL TRIM SIZE 7 5 in x 9 0 in LIMIT TYPE LIN MAG LINE TYPE DATA LINE TYPE MEMORY LIST VALUES Refer
68. For continued protection against fire hazard replace line fuse only with same type and ratings The use of other fuses or materials is prohibited The correct fuse types are listed on the rear panel of each instrument section If this product is to be energized via an external autotransformer for voltage reduction make sure that its common terminal is connected to a neutral earthed pole of the power supply When installing the product in a cabinet the convection into and out of the product must not be restricted The ambient temperature outside the cabinet must be less than the maximum operating temperature of the product by 4 C for every 100 watts dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used This product is designed for use in INSTALLATION CATEGORY II and POLLUTION DEGREE 2 per IEC 1010 and 664 respectively 1 2 FINAL TRIM SIZE 7 5 in x 9 0 in Contents Installing Step 1 Inspect the shipment ssssssss e 1 4 Step 2 Connect the two instrument sections aea aaa aaa aaa 1 5 Step 3 Set the line voltage 2 0 0 0 e 1 7 Step 4 Connect the rear panel cables 000 000 0002 kaaa 1 10 Step 5 Verify Operation 2 0 0 0 0 e e 1 11 To replace the line fuse 2 cnt eee enn 1 19 Cleaning Connections for Accurate Measurements 0 00005 1 21 To clean a non lensed connector 6 eee eens 1 2
69. IM SIZE 7 5 in x 9 0 in Contents continued Performing Measurements Performing Manual Calibrations Saving Instrument States to Registers aaa aaa 3 36 To save to a register 6 eect nett aaa 3 38 To recall a register 22 00 n teen e ees 3 38 To increase user memory 0 6 ao 3 39 Saving Instrument States to Files a aaa kaaa kaaa aaa 3 40 To save toa disk sssssssssssseesessese eR ee 9 41 To change a file name 0 000 III 3 42 To recall an external file aaa 3 43 To delete an external file 2 0 aaa 3 43 To format an external disk aaa 3 43 To connect a disk drive sssssesssssssssls e 9 44 Changing Colors and Audible Warnings 00 00 cece cence ns 3 45 To adjust displayed colors 2 0 0 ccc ett eee eee 3 45 To turn on the warning beep 0 0 eee eee eee 3 45 To turn off the done beep 6 cette eens 3 46 Printing and Plotting 2 eee 3 47 To print the display 000 ao 3 48 To plot the display 0 00 Ie 3 48 To print or plot measurement and parameter values 3 49 To enter the printer plotter type and address sss 3 49 To abort a print or plot ao 3 50 3 3 FINAL TRIM SIZE 7 5 in x 9 0 in Setting the Measurement Range It s easy to set the precision reflectometer s measurement span Simply select the appropriate setting using the START and STOP keys or CENTER an
70. IZE 7 5 in x 9 0 in Index 15 PLOT MKR ON off softkey 5 38 PLOT softkey 3 48 4 44 5 37 LOT SPEED softkey 4 44 5 38 otter address 4 4 LOTTER not on not connected wrong addrs error message 7 8 LOTTER NOT READY PINCH WHEELS UP error message 7 9 LOT TEXT ON off softkey 5 38 otting aborting 3 50 default values 5 19 measurement data values 3 49 on transparencies 5 38 operating parameters 3 49 lotting 3 47 lotting the display 3 47 3 48 olarization sensitivity 2 2 olar vector display 2 6 POSITION OFFSET softkey 3 22 4 32 5 38 POSITION VALUE softkey 4 33 5 39 POWER SUPPLY HOT error message 7 9 PREP command 4 44 PRES command 4 44 PRESET key 2 6 5 39 menu map 5 10 PREV PAGE softkey 4 44 PRIC command 4 44 PRINALL command 4 44 rinter address 4 4 types of 3 47 PRINTER not on not connected wrong addrs error message 7 9 rinting 3 47 aborting 3 50 display 3 48 measurement data values 3 49 operating parameters 3 49 rinting 3 47 RINT PLOT SETUPS softkey 5 40 RINT softkey 3 48 4 44 5 39 RINT STANDARD softkey 4 45 5 40 RIS command 4 45 rogrammable delay line 3 5 5 51 URG command 4 45 URGE FILE1 softkey 5 40 URGE FILE2 softkey 5 40 URGE FILES softkey 5 40 U U U I U U U U U U U RGE FILE4 softkey 5 40 RGE FILES softkey 5 40 RGE FILES softkey 5 40 U U U U U U v Index 16 FINAL TRIM SIZE 7 5 in x 9 0 in
71. Item Description value value 1 to 999 1 0000 to 200 default 1 0 Operation complete Reports the completion of the next command received by setting bit 0 in the event status register or by replying to the interrogation form of the command OPC Syntax OPC Lists the key parameters on the display Syntax OPEP Equivalent softkey COPY OPERATING PARAMETERS Outputs the active entry area function value or the value of the last active function if the active entry area is off Syntax OUTPACTI Outputs the error corrected data Data format data 0 Syntax OUTPDATA Outputs the error message in the error queue Data format Error Number string of no more than 50 characters Syntax OUTPERRO 4 40 FINAL TRIM SIZE 7 5 in x 9 0 in OUTPFORM OUTPIDEN OUTPKEY OUTPLEAS OUTPLIMF OUTPLIML OUTPLIMM Programming Instrument Commands Outputs the formatted trace data Format depends on the current setting for display format Syntax OUTPFORM Outputs the identification string HEWLETT PACKARD HP 8504B 0 X XX where X XX is the firmware revision This command is identical to the IDN command Syntax OUTPIDEN Outputs the key code of the last key pressed An invalid key is outputted with 63 a knob turn with 1 Syntax OUTPKEY Refer to the KEY command in this chapter for a figure that shows the key codes that correspond to front panel keys Outputs the learn string which contains
72. L END I1 MeV A APA hriala CENTER 35 mm 1300 nm n M m SPAM 19 Press LIMIT TYPE FLAT LINE and then RETURN 26 mm This defines the second segment as a flat line Note that Type is now FL 20 Press ADD POSITION VALUE and enter a value of 36 dB 21 Press UPPER LIMIT and enter a value of 45 dB 22 Press DONE Note that flat lines begin and end at the same horizontal position but are not connected See the following figure FINAL TRIM SIZE 7 5 in x 9 0 in 3 29 Performing Measurements Creating Limit Lines DATA log MAG 18 dB REF 5B dB 1 54 BB2 dB hp 25 mm C SEG POSITION nmi pedr dBi Lower dH TYPE z 34 0HB 9 4206 FL gt 3 36 B 745 4206 FL END I1 Pr tes Aetoli Cota Present Aga go CENTER 35 mm 1388 nm n M m SPAM Z8 mm 23 Press ADD DONE LIMIT TYPE SINGLE POINT and RETURN This defines a single point segment Note that the single point appears on the screen as just that a single dot It is not drawn as a caret because it is defined as a line of no length rather than a single point 24 Press ADD POSITION VALUE and enter a value of 37 dB 25 Press UPPER LIMIT and then DONE Note that stand alone single points are drawn as carets 3 30 FINAL TRIM SIZE 7 5 in x 9 0 in 26 Shift the lim
73. LUE or MARKER MIDDLE to set limits for testing a device that is specified at a particular value plus or minus an equal tolerance For example a device may be specified at 0 dB 3 dB Enter the middle value as 0 dB and the delta limits as 3 dB When DELTA LIMITS or MIDDLE VALUE is pressed all the segments in the table are displayed in these terms even if they were defined as upper and lower limits Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE EDIT DELTA LIMITS 5 20 FINAL TRIM SIZE 7 5 in x 9 0 in DISK FILE FORMAT DISK UNIT NUMBER DISPER COR on OFF DISPLAY DATA EDIT Reference Keys Softkeys and Connectors Presents a menu for selecting the format of data that will be saved on a disk Key Path SAVE STORE TO DISK DEFINE STORE DISK FILE FORMAT Specifies the number of the disk drive s disk that is to be accessed in an external disk store or load routine This number is used with the disk drive s HP IB address and volume number of the to gain access to a specific area on a disk The access hierarchy is 1 HP IB address 2 Disk unit number 3 Disk volume number Key Path LOCAL DISK UNIT NUMBER Enables or disables the application of chromatic dispersion correction data taken using the 1550 nm source This function has no effect upon the 1300 nm source Refer to Performing Manual Calibrations in Chapter 2 for a discussion of chromatic dispersion effects Key Path CAL CALI
74. NTROLLER ON HP IB 38 DISK not on not connected wrong addrs 39 DISK HARDWARE PROBLE 40 DISK MEDIUM NOT INITIALIZED 41 O DISK MEDIUM IN DRIVE 42 HRST CHARACTER MUST BE A LETTER FINAL TRIM SIZE 7 5 in x 9 0 in 7 11 Error Messages Number Error Message 43 ONLY LETTERS AND NUMBERS ARE ALLOWED 44 OT ENOUGH SPACE ON DISK FOR STORE 45 O HLEIS FOUND ON DISK 46 LLEGAL UNIT OR VOLUME NUMBER 4 ITIALIZATION FAILED 48 DISK IS WRITE PROTECTED 49 DISK WEAR REPLACE DISK SOON 51 SUFFICIENT MEMORY 52 SYSTEM IS NOT IN REMOTE 54 O VALID MEMORY TRACE 55 O VALID STATE IN REGISTER 56 STRUMENT STATE MEMORY CLEARED 83 SOURCE 1 TEMPERATURE LOOP OPEN 94 SOURCE 2 TEMPERATURE LOOP OPEN 95 OTOR STOPPED EXCESSIVE POSITION ERROR 96 OTOR STOPPED POSITIVE LIMIT 97 OTOR STOPPED NEGATIVE LIMIT 99 OTOR RESET FAILED 00 OTOR TRAJECTORY ERROR 01 OTOR COMMAND ERROR 02 CHECK 1 0 CABLE 03 O SOURCE FOUND CHECK POWER TO TEST SET 04 ASCII MISSING CITIFILE statement 05 ASCII MISSING VAR statement 06 ASCII MISSING DATA statement 07 ASCII MISSING BEGIN statement 08 TEST CANNOT EXECUTE WHEN SOURCE IS OFF 09 NO SIGNAL CHECK BNC CABLE ON REAR PANEL
75. PUT connector 6 Turn the precision reflectometer on and allow it to warm up for at least one hour 7 Locate two fiber optic cables that are of equal length If you plan to measure a device that has a pigtail the cables must be equal to or up to 240 mm shorter than the length of the pigtail 8 Connect one of the cables between front panel REFERENCE EXTENSION connectors A and B 9 If you plan to measure a device that does not have a pigtail connect a low reflection termination to TEST PORT using the remaining fiber optic cable 10 If you plan to measure a device that has a pigtail connect a low reflection termination directly to the TEST PORT NOTE Do not move the reference extension cable for the rest of this procedure Any movement of this cable will change the reference signal polarization and will invalidate the calibration 11 Press MENU and then EXTERNAL 2 26 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Performing Manual Calibrations 12 Press and then CALIBRATE MENU 13 Press BALANCE RECEIVER The power of the external source should not exceed 5 mW Power levels greater than 5 mW can damage the 8504B CAUTION 14 Turn the external source on Intensity modulate the external source at 27 kHz Without the modulation the displayed response contains a high noise level 15 Adjust the two polarization balance knobs until the line is in the shaded
76. R COMMAND ERROR error message 7 6 OTOR RESET FAILED error message 7 6 OTOR STOPPED EXCESSIVE POSITION ERROR error message 7 6 OTOR STOPPED NEGATIVE LIMIT error message 7 7 OTOR STOPPED POSITIVE LIMIT error message 7 7 OTOR TRAJECTORY ERROR error message 7 7 RK key 3 13 2 2 2 z2 2222 N n 3 5 5 42 5 48 V symbol 3 12 EXP command 4 39 EXT PAGE softkey 4 39 EXT PEAK HIGHER softkey 5 35 EXT PEAK LEFT softkey 5 35 EXT PEAK LOWER softkey 5 35 EXT PEAK RIGHT softkey 4 37 5 35 O DISK MEDIUM IN DRIVE error message 7 7 O FILE S FOUND ON DISK error message 7 7 noise reducing 3 9 O MARKER DELTA SPAN NOT SET error message 7 7 OOP command 4 40 O SIGNAL CHECK BNC CABLE ON REAR PANEL error message 7 7 O SOURCE FOUND CHECK POWER TO TEST SET error message 7 8 OT ENOUGH SPACE ON DISK FOR STORE error message 7 8 notice for germany noise declaration 6 16 O VALID MEMORY TRACE error message 7 8 O VALID STATE IN REGISTER error message 7 8 UMG command 4 40 offices sales and service 1 29 ONLY LETTERS AND NUMBERS ARE ALLOWED error message 7 8 OPC command 4 13 OPC command 4 40 OPEP command 4 40 operating parameters lists of 3 49 OPERATING PARAMETERS softkey 4 40 operation verification 1 11 OP PARMS MKRS etc softkey 3 49 5 35 Option 001 accessory kit 1 4 OPTIONAL FUNCTION NOT INSTALLED error message 7 8 options 5 55 UTPACTI command 4 40 UTPDATA command
77. RAW ARRAY on OFF softkey 5 40 READ FILE TITLES softkey 4 45 5 40 rear panel cables 1 10 ECA command 4 45 ECALL COLORS softkey 4 45 5 41 ECALL key menu map 5 6 ECALL key 5 4 ECALL REGI softkey 5 41 ECALL REG2 softkey 5 41 ECALL REGS softkey 5 41 ECALL REG4 softkey 5 41 ECALL REGS softkey 5 41 ECEIVER ARM OUTPUT connector 5 41 ECO command 4 45 reference line 3 45 position line 3 7 REFERENCE EXTENSION A connector 5 41 REFERENCE EXTENSION B connector 5 41 REFERENCE POSITION softkey 4 45 5 41 REF REF AMA T ed d sS 8 NN ERENCE VALUE softkey 4 46 5 42 P command 4 45 refractive index 3 5 3 8 entering 3 8 FRACTIVE INDEX n softkey 3 8 5 42 FT command 4 45 REFV command 4 46 registers 3 36 status 4 10 regulatory information 6 16 remote control 4 2 repackaging for service 1 27 REQUESTED DATA NOT CURRENTLY AVAILABLE error message 7 9 RESD command 4 46 RESET COLOR softkey 4 47 5 42 response position 2 4 REST command 4 46 RESTORE DISPLAY softkey 4 46 5 42 returning to hp 1 26 return loss measurement range 6 5 uncertainty 6 6 RIGHT LOWER softkey 4 46 5 42 RIGHT UPPER softkey 4 46 5 42 RIGL command 4 46 RIGU command 4 46 RSCO command 4 47 RST command 4 14 me Ga FINAL TRIM SIZE 7 5 in x 9 0 in Index 17 S SADD command 4 47 safety symbols ix sales and service offices 1 29 SAVE COLORS softkey 4 51 5 43 SAVE command
78. RY 2 ERASE TITLE TITLE MORE DONE ADJUST DISPLAY BEEP DONE ON off BEEP WARN on OFF INTENSITY MODIFY COLORS DEFAULT COLORS SAVE COLORS RETURN RETURN 1 Displayed only if color was previously saved BACKGROUND INTENSITY RECALL COLORS Reference Menu Maps DATA LIMIT LN MEMORY 1 MEMORY 2 REF LINE GRATICULE TEXT WARNING TEXT TINT BRIGHTNESS COLOR RESET COLOR RETURN RETURN FINAL TRIM SIZE 7 5 in x 9 0 in displaym FORMAT VERT LOG MAG LIN MAG HORIZ DISTANCE TIME formatm 5 5 Reference Menu Maps SYSTEM CONTROLLER TALKER LISTENER USE PASS CONTROL SET ADDRESSES ADDRESS HP8504 ADDRESS PLOTTER ADDRESS PRINTER ADDRESS DISK ADDRESS CONTROLLER HP IB DIAG on OFF DISK UNIT NUMBER VOLUME NUMBER RETURN localm RECALL RECALL REG LOAD FILET RECALL REG2 LOAD FILE2 RECALL REGS LOAD FILES RECALL REG4 LOAD FILE4 RECALL REGS LOAD FILES READ FILE TITLES LOAD FROM DISK RETURN 1 This softkey appears only when information is saved to the register recallm 5 6 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Menu Maps SAVE SAVE REQ1 CLEAR REQ11 TITLE REQ SELECT LETTER SAVE REQ2 CLEAR REQ21 TITLE REQ2 SAVE REOS CLEAR REQ31 TITLE REQS SPACE SAVE REQ4 CLEAR REQ41 TITLE REQ4 SAVE REQS CLEAR REQ51 TITLE REQS BACK SPACE CLEAR REGISTER CLEAR ERASE TITLE TITLE REGISTER COPY FROM FILE TITLE STORE TO
79. S PS FS Equivalent softkey MENU START Reads the status byte Syntax STB Defines the stop value of the stimulus Syntax STOP value suffix Item Description value Domain dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey MENU STOP Store the file associated with position 1 2 3 4 or 5 to disk Requires pass control To store a file by title use TITF first to put the file name into the position 1 through 5 as desired then use STOR Syntax STOR 1 21314 5 Equivalent softkey SAVE STORE TO DISK 4 50 FINAL TRIM SIZE 7 5 in x 9 0 in SVCO TALKLIST TIME TINT TITF Programming Instrument Commands Saves the modified color set Syntax SVCO Equivalent softkey DISPLAY SAVE COLORS Puts the reflectometer in talker listener HP IB mode Syntax TALKLIST Equivalent softkey LOCAL TALKER LISTER Formats the horizontal axis as time Syntax TIME Equivalent softkey FORMAT IME Adjusts the hue of the chosen attribute Refer to the COLO command Syntax TINT lt value gt Item Description value lo to 100 Equivalent softkey DISPLAY TINT Title the file associated with position 1 through 5 for subsequent disk access Used in conjunction with LOAD STORE and PURG to put a file name into the position 1 through 5 as desired Syntax TITF 112 3 4 5 lt string gt Item Description string Up to 8 alp
80. SET ADDRESSES The display shows the current address for the precision reflectometer 3 Press ADDRESS HP8504 and enter the new address 4 Press x1 to enter the new address 4 8 FINAL TRIM SIZE 7 5 in x 9 0 in Monitoring the Instrument The following figures show the instrument s status reporting registers These registers allow you to monitor the instrument s operating condition during a program Use the STB common command to read the status byte CLS clears the status byte SRE enables status byte bits Use the ESR common command to read the standard event status register Refer to IEEE 488 2 Common Commands in this chapter for information on common commands Status Byte Bit Definitions Bit Name Description 2 Check event status register B One of the enabled bits in event status register B has been set 3 essage in error queue An error has occurred and the message has been placed in the error queue but has not been read yet 4 essage in output queue A command has prepared information to be output but it has not been read yet 5 Check event status register One of the enabled bits in the event status register has been set 6 Request service One of the enabled status byte bits is causing an SRO 4 9 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Monitoring the Instrument Event Status Register Bit Definitions
81. SPLAY DATA to display only the data trace MEMORY to display only the memory trace DATA and MEMORY 1 to display both traces 3 35 FINAL TRIM SIZE 7 5 in x 9 0 in Saving Instrument States to Registers In this section you ll learn how to save the instrument state to internal registers The next section show how to save instrument states to external files on a disk Instrument states include the following data e Measurement data e Memory traces e Calibration data not user calibration data e Learn string Measurement data can not be saved to an internal register You can select the type of measurement data saved to an external disk The following types are available Corrected data also called data array Uncorrected data also called raw array Formatted array Graphics array What s a learn string The learn string is an encoded array It contains only the data needed to set up the reflectometer to make a specific measurement That data consists of stimulus and response parameters and operating mode state including wavelength and correction status Learn strings are saved in non volatile memory They are not erased by pressing PRESET or cycling power 3 36 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Saving Instrument States to Registers Data Stored with Instrument State Data Type Internal Register External Disk learn String e Measurement Data
82. START FINAL TRIM SIZE 7 5 in x 9 0 in Using Markers Markers allow you to read the amplitude values at any position on the trace You can easily determine the distance and amplitude value of any response The active marker is shown on the display as a V symbol Inactive markers are shown with the A symbol The following figure shows markers 1 through 4 Marker 3 is active markers 1 2 and 4 are inactive Notice that marker 4is a delta marker Delta markers measure the difference between two positions on the display Active Inactive Marker Marker log MAG REF 50 dB 38 754 dB hp 24 7 mm AREF FIXED Tai 295 881 dB 31 5 mm co MARKER 3 FIXED NKR B8 3d7 apl Loz vimm 29 4 mm 8 754 dB 4aj 15 056 GB V HI d 4 e FIR VO peer 4 CENTER 317 mm 1888 nm n l SPAN 58 mm markers 3 12 FINAL TRIM SIZE 7 5 in x 9 0 in A markers display relative values The fixed marker is a special delta marker reference What if a memory trace is displayed You can define a peak Performing Measurements Using Markers Markers are accessed from two front panel keys e Use to display up to four markers an additional fixed marker and delta markers e Use MKR FCTN to search for peak responses and to change the measurement span based on marker positions The active marker can be moved to any point on the trace When a logarithmic amplitud
83. T 4 43 FINAL TRIM SIZE 7 5 in x 9 0 in PLOS PLOT PREP PRES PRINALL PRIC Programming Instrument Commands Sets the plotting speed to fast or slow Syntax PLOS FAST SLOW Equivalent softkey COPY PLOT SPEED Plots the display to a graphics plotter Syntax PLOT Equivalent softkey COPY PLOT Displays the previous page of information in a tabular listing onto the display Syntax PREP Equivalent softkey COPY PREV PAGE Sets the reflectometer to the factory preset condition Syntax PRES Equivalent key PRESET Copies the measurement display to the printer Syntax PRINALL Equivalent softkey COPY PRINT Selects color printing Syntax PRIC Equivalent softkey COPY COLOR 4 44 FINAL TRIM SIZE 7 5 in x 9 0 in PRIS PURG RECA RECO REFP REFT Programming Instrument Commands Sets the print command to the default selection Syntax PRIS Equivalent softkey COPY PRINT STANDARD Removes the file associated with position 1 5 from disk Requires pass control To remove a file by title use the TITF 1 5 first to put the file name into the position 1 5 desired then PURG 1 5 Syntax PURG 1 21314 5 Equivalent softkey SAVE STORE TO DISK Recall internal register 1 2 3 4 or 5 Syntax RECA 1 2 3 45 Recalls the previously saved color set Syntax RECO Equivalent softkey DISPLAY RECALL COLORS Sets the position of the reference line on the
84. T LETTER e The first letter must be a letter e Only letters and numbers are allowed Do not use mathematical symbols e Fight is the maximum number of characters 5 Press DONE to rename the file 3 42 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Saving Instrument States to Files To recall an external file 1 Press on the precision reflectometer 2 Press LOAD FROM DISK and then READ FILE TITLES 3 Press RETURN 4 Press a softkey to recall a file To delete an external file 1 Press SAVE on the precision reflectometer 2 Press STORE TO DISK DEFINE STORE PURGE FILES and then READ FILE TITLES 3 Press the softkey for the file that you want to delete To format an external disk 1 Connect a disk drive as explained in To connect a disk drive in this section 2 Press SAVE on the precision reflectometer 3 Press STORE TO DISK DEFINE STORE INITIALIZE DISK and then INIT DISK YES While the disk is being formatted the message WAITING FOR DISK is displayed 3 43 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Saving Instrument States to Files To connect a disk drive 1 Use an HP IB cable to connect the disk drive to the precision reflectometer 2 Press LOCAL on the precision reflectometer 3 Press SYSTEM CONTROLLER so that the precision reflectometer can control the disk drive 4 Press SET ADDRESSES The display shows th
85. TMRAW READ HLE TITLES REFT RECALL COLORS RECO RECALL REGI to REGS PRESETS RECA REFERENCE REFV REFERENCE POSITION REFP RESET COLOR RSCO RESTORE DISPLAY RESD RIGHT LOWER RIGL RIGHT UPPER RIGU SAVE COLORS SVCO SAVE REG1 to REGS PRESET SAVE SCALE I DIVI SCAL SCALE PLOT FULL SCAPFULL SCALE PLOT GRAT SCAPGRAT SINGLE SING SINGLE POINT LIMTSP SLOPING LINE LIMTSL SOURCE OFF SOUROFF SPAX SPA START STAR STOP sme STOR FILET to FILES STOR TALKER LISTENER TALKLIST TEXT COLOTEXT TIME TIME TINT TINI 4 58 FINAL TRIM SIZE 7 5 in x 9 0in Programming Keys versus Commands Keys versus Commands continued Key Equivalent Programming Command TITLE TITL TITLE FILET to FILES TITF TITLE REGI to REGS TITR TRIGGER HOLD HOLD UPPER LIMIT LIMU USE PASS CONTROL USEPASC USER STD CALSUSER VERT LOG MAG LOGM VOLUME NUMBER DISKVOLU WARNING COLOWARN ZERO SPAN on OFF ZERS FINAL TRIM SIZE 7 5 in x 9 0 in 4 59 Programming FINAL TRIM SIZE 7 5 in x 9 0 in Reference FINAL TRIM SIZE 7 5 in x 9 0 in Contents Reference Menu Maps 2 0 0 0 0c ee ce een 5 3 Keys Softkeys and Connectors 2 0 0 ccc eee kakaa 5 11 Block Diagram 00 6 aaa 5 52 Front Panel Fiber Optic Adapters 000 00 00 aaa ccc cee eee ees 5 53 Part Numbers 0 0 een teen ebb kaaa 5 54 Instrument Options a aaa aaa aaa 5 55 L
86. UST DISPLAY MODIFY COLORS GRATICULE TEXT This guided procedure provides a convenient way to perform a full instrument calibration Displayed steps guide the user through a calibration It takes about two minutes to complete Key Path CAL GUIDED CAL This guided procedure provides a convenient way to prepare for measurements Displayed steps guide the user through selecting a source and performing a calibration Different steps are presented depending on whether the device being measured has a pigtail The guided setup takes about two minutes to complete Key Path PREsET GUIDED SETUP Key Path SYSTEM GUIDED SETUP Indicates that the precision reflectometer is waiting for an external trigger signal to initiate a sweep Sets the horizontal axis to display the sweep in terms of distance This is the default scale The default and maximum value is 400 mm 200 mm when n 2 133 3 mm when n 3 an so forth The minimum value is 1 mm 0 5 mm when n 2 an so forth Key Path FORMAT HORIZ DISTANCE 5 26 FINAL TRIM SIZE 7 5 in x 9 0 in HP IB connector HP IB DIAG on OFF INIT DISK YES INITIALIZE DISK INTENSITY Reference Keys Softkeys and Connectors This rear panel connection connects the precision reflectometer to an external controller and other instruments in an automated system It is also used when the precision reflectometer itself is the controller of compatible peripherals such as pri
87. VOLU lt volume number gt Equivalent softkey LOCAL DISK UNIT NUMBER Enable disable the display of all markers that have been individually turned on below active marker area upper right hand corner of display Syntax DISM ON OFF 7 Equivalent softkey MKR DISP MKRS ON off Enable disable dispersion correction of data taken with 1550 nm source selected Syntax DISPCOR ON OFF Equivalent softkey CAL DISPER COR Displays a trace of the measured data Syntax DISPDATA Equivalent softkey DISPLAY DISPLAY DATA 4 23 FINAL TRIM SIZE 7 5 in x 9 0 in DISPDATM DISPM EMO DIST DOWN EDITLIML ENTO ESB Programming Instrument Commands Displays traces of both the measured data and the memory data Syntax DISPDATM Equivalent softkey DISPLAY DATA and MEMORY Displays the trace of the memory data Syntax DISPMEMO Equivalent softkey DISPLAY MEMORY Formats the horizontal axis as distance Syntax DIST Equivalent softkey DISPLAY HORIZ DISTANCE Decrements the value in the active entry area Down arrow key in the ENTRY area Syntax DOWN Begins editing the limit line table Syntax EDITLIML Equivalent softkey SYSTEM EDIT LIMIT LINE Turns off the active entry area Syntax ENTO Returns the event status register B value Syntax ESB 4 24 FINAL TRIM SIZE 7 5 in x 9 0 in ESE ESNB ESR EXTMDATA EXTMFORM EXTMGRAP Programming Instrument Comma
88. able 50 cm FC PC fiber optic cab 75 cm FC PC fiber optic cab e BO Nh RO inim im e 1 Used to connect two FC PC fiber optic cables 1 4 FINAL TRIM SIZE 7 5 in x 9 0 in WARNING Step 2 Connect the two instrument sections Always disconnect and separate the two instrument sections before lifting or moving the instrument Otherwise you may harm yourself or damage the instrument 1 Verify that serial number labels on the two instrument sections contain the same serial number You ll find these labels on the precision reflectometer s rear panel Make sure that the serial number and options listed on the labels match the serial number and options listed on the shipping document 2 Place the lightwave section on a steady sturdy work surface 3 Place the display processor on top of the lightwave section so that the front edge of the display processor is about 0 6 cm 0 25 in in front of the lightwave section DISPLAY PROCESSOR LIGHTWAVE SECTION 4 Slightly lift the rear of the display processor and slide it back until its front edge is even with the front edge of the lightwave section 1 5 FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 2 Connect the two instrument sections Hooks on the top of the lightwave section will slide into slots on the display processor and lock the front panels of the two sections together 5 Confirm that the two inst
89. actory set colors Key Path DISPLAY MORE ADJUST DISPLAY DEFAULT COLORS Resets the plotting parameters to their default values as shown in the following table Default setups do not apply to prints A beep sounds when default setups is selected Default Plot Values Parameter Default Setting Select quadrant full page Define plot all plot elements on Plot scale ful Plot speed fast Line type 7 solid line Pen numbers default values Key Path COPY PRINT PLOT SETUPS DEFAULT SETUPS 5 19 FINAL TRIM SIZE 7 5 in x 9 0 in DEFINE PEAK DEFINE PLOT DEFINE STORE DELETE DELTA LIMITS Reference Keys Softkeys and Connectors Presents a menu for defining the peak excursion and peak threshold values that are used to locate peak responses Key Path MKR FCTN PEAK SEARCH DEFINE PEAK Presents a menu for selecting displayed items to plot on the plotter and for scaling the plot Key Path COPY DEFINE PLOT Presents a menu that is used to specify what data is to be stored on disk in addition to the instrument state Key Path SAVE STORE TO DISK DEFINE STORE Deletes the limit line segment indicated by the pointer gt Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE DELETE Sets the limits an equal amount above and below a specified middle value instead of setting upper and lower limits separately This is used in conjunction with MIDDLE VA
90. ade Gray saudia Arabia 8120 4754 90 230 90 Jade Gray Taiwan 250V 8120 5182 Straight NEMA5 15P 200 78 Jade Gray Israel ey 8120 5181 90 200 78 Jade Gray Part number for plug is industry identifier for plug only Number shown for cable is HP Part Number for complete cable including plug kk E Earth Ground L Line N Neutral FORMATS8O 5 56 FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information FINAL TRIM SIZE 7 5 in x 9 0 in Verify factory calibration once every year Definitions of Terms Specifications and Regulatory Information This chapter contains specifications and characteristics for 8504B The instrument must be stabilized at a temperature within the operating range before it is turned on A minimum of one hour should be allowed when the instrument has been outside this temperature range Warranted performance will be achieved only over the restricted temperature range of 25 5 C after a one hour warmup The user calibration is only valid for a temperature window of 3 C from the original calibration temperature Your 8504B has been calibrated at the factory The instrument should be returned to Agilent Technologies once every year to be recalibrated Begin timing the first recommended calibration interval from the time when the instrument is first turned on Do not include shipment and storage time that occurs before the instrument is first turned on
91. al times in this material should provide sufficient protection and also prevent movement in the carton 3 Seal the carton with strong nylon adhesive tape 4 Mark the carton FRAGILE HANDLE WITH CARE 5 Retain copies of all shipping papers 1 27 FINAL TRIM SIZE 7 5 in x 9 0 in Installing Returning Your Instrument Service Repair Form Date Company Address Technical contact person Phone Model numher Serial numher PO number Accessories returned with unit none oablesisi power cable adapteris Other Service Needed calibration only repair O repair and calibration Other Failure symptoms and special control settings If unit is part of system list model number s of other interconnected instruments 1 28 FINAL TRIM SIZE 7 5 in x 9 0 in Agilent Technologies Sales and Service Offices Before returning an instrument for service call the Agilent Technologies Instrument Support Center at 800 403 0801 visit the Test and Measurement Web Site at http www agilent com find assist or call one of the numbers listed below Agilent Technologies Sales and Service Offices Office Location Phone Number Austria 01 25125 7171 Belgium 32 2 118 31 11 Brazil 11 7297 8600 China 86 10 6261 3819 Denmark
92. ance or time This line is continuous to the next stimulus value but is not joined to a segment with a different limit value Ifa flat line segment is the final segment it terminates at the stimulus stop value A flat line segment is indicated as FL on the table of limits Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE LIMIT TYPE FLAT LINE Presents softkeys for selecting the format of the vertical and horizontal scales Specifies whether or not to store the formatted data on disk with the instrument state Key Path SAVE STORE TO DISK DEFINE STORE FORMAT ARY on OFF Selects binary data format which is the faster more compact data storage format When selected the following data is formatted in binary Data arrays corrected Raw data arrays Formatted array Display memory array Key Path SAVE STORE TO DISK DEFINE STORE DISK FILE FORMAT FORMAT BINARY 5 24 FINAL TRIM SIZE 7 5 in x 9 0 in FRESNEL 15 dB FRESNEL 14 7 dB FULL PAGE FULL SPAN Reference Keys Softkeys and Connectors Selects the percentage of reflectance from the open end of super PC cable as the reflection standard when the source is 1300 nm For every reference extension cable supplied with the 8504B there is a corresponding cable of equal length which may be used as a calibration standard The return loss of the fiber end is 15 dB or 3 16 reflection at 1300 nm 10 Log 0 0316 15 dB A clean cable end is an acc
93. any instrument features are available through the use of softkeys Softkeys are the eight keys that are located along the right hand side of the display The definitions for these keys are shown on the display next to the key and change for different menus vi FINAL TRIM SIZE 7 5 in x 9 0 in Title Message Area Active Entry Area Stotus Notations Reference Marker Format Value Active Values Morker Values Measured Inputs s Softkey Labels Scale Div Pass Fail Sweep Dot Stimulus Wovelength n value Stimulus Start Value Stop Value Annotation Shown in the Display s Status Notation Area Status Description Notations easurement parameters changed measured data is in doubt until a complete clean sweep has been taken Avg Sweep to sweep averaging is on The averaging count is shown immediately below this notation C Error correction measurement calibration is on D Dispersion correction is on This notation is available for the 1550 nm source only ext Waiting for an external trigger at the rear panel Hid Hold sweep OVL Amplitude of reflected signal at test port is too large FINAL TRIM SIZE 7 5 in x 9 0 in vii BIBIGIO OOOHH AY OOO YOU front panel knob Allows continuous adjustments to current values for various functions such as start value scale and others Values changed by the knob are effective immediately and
94. as a pigtail the cables must be equal to or up to 240 mm shorter than the length of the pigtail Connect one of the cables between front panel REFERENCE EXTENSION connectors A and B If you plan to measure a device that does not have a pigtail connect a low reflection termination to TEST PORT using the remaining fiber optic cable If you plan to measure a device that has a pigtail connect a low reflection termination directly to the TEST PORT NOTE Do not move the reference extension cable for the rest of this procedure Any movement of this cable will change the reference signal polarization and will invalidate the calibration Press and then CALIBRATE MENU Press BALANCE RECEIVER Adjust the two polarization balance knobs until the line is in the shaded area 2 23 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Performing Manual Calibrations Adjust vector line to be within shaded greg shown 9 Press DONE 10 Remove the low reflection termination 2 24 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Performing Manual Calibrations To calibrate the magnitude Always balance the receiver before calibrating the magnitude Balancing the receiver ensures that the displayed response magnitude is insensitive to the polarization transformations of the fiber in the test arm when the return loss of the device being tested is
95. as the following settings Band 0 aaa e las 1300 nm Nu 0 mm NONE 400 mm Sweep llsesees e e e e e a e ee ees continuous Horizontal units a aa IR distance N value a e RH es 1 Displayed trace 0 2 2 n data Vertical units ee n ete rrr log mag Vertical scale 6 aa 10 dB division Reference level avau 50 dB Markers 22 0 e le off Averaging 206 ete e e tenet teenies off Correction oo ee a he ees off Dispersion correction em res off HP IB mode sssssssssse IR e talker listener Copies the display to a compatible graphics printer Tabular listings or data displays can be printed although a plotter provides better resolution for data displays All information from the screen is printed except the softkey labels If list values are being printed copies one page of the tabular listings to a compatible Hewlett Packard graphics printer connected to the precision reflectometer over HP IB Key Path coPv PRINT Key Path COPY PRINT PLOT SETUPS COLOR 5 39 FINAL TRIM SIZE 7 5 in x 9 0 in PRINT PLOT SETUPS SERVICE MENU PRINT STANDARD PURGE FILEn PURGE FILES RAW ARRAY on OFF READ FILE TITLES Reference Keys Softkeys and Connectors Presents a menu to select a standard non color or color printer as the default and lets you reset the print and plot definitions Key Path COPY PRINT PLOT SETUPS This softkey provide
96. ath AVG AVERAGING FACTOR Reduces displayed noise by averaging consecutive traces When on Avg is displayed above the count on the display s left side Key Path AVG AVERAGING on OFF Restarts trace averaging when AVERAGING on OFF issetto on Key Path AVG AVERAGING RESTART 5 14 FINAL TRIM SIZE 7 5 in x 9 0 in BACKGROUND INTENSITY BACK SPACE BALANCE RECEIVER BEEP DONE ON off BEEP FAIL on OFF Reference Keys Softkeys and Connectors Adjusts the intensity of the screen s background from 0 black to 100 white This intensity adjustment is not affected by preset or the MODIFY COLORS DEFAULT COLORS SAVE COLORS or RECALL COLORS Key Path DISPLAY MORE ADJUST DISPLAY BACKGROUND INTENSITY Deletes the last character entered when creating a title Key Path DISPLAY TITLE BACK SPACE Key Path SAVE TITLE REGISTER TITLE REGn BACK SPACE Key Path SAVE STORE TO DISK TITLE FILES TITLE FILEn BACK SPACE Performs a balance receiver calibration This ensures that the displayed response magnitude is insensitive to the polarization transformations of the fiber in the TEST PORT path when the return loss of the device being tested is polarization independent Key Path CAL CALIBRATE MENU BALANCE RECEIVER Causes the instrument to sound a beep upon completion of operations such as saving data into memory or saving an instrument state Key Path DISPLAY MORE BEEP DONE ON
97. atio use averaging Turn on averaging by pressing AvG and then AVERAGING on OFF so that ON is highlighted FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations To perform a guided calibration 1 Press PRESET 2 Press 1300 nm or 1550 nm to select the source wavelength 3 Press CAL and then GUIDED CAL 4 Locate two fiber optic cables that are of equal length 5 Connect one of the cables between front panel REFERENCE EXTENSION connectors A and B 6 If you plan to measure a device that has a pigtail continue at step 13 in To perform a guided setup devices with pigtail in this chapter 7 If you plan to measure a device that does not have a pigtail do the following steps a Connect the second fiber optic cable to the front panel TEST PORT b Continue at step 13 in To perform a guided setup devices without pigtail in this chapter FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations FINAL TRIM SIZE 7 5 in x 9 0 in Calibrating pigtailed devices Calibration standards are provided Performing Manual Calibrations The precision reflectometer allows you to control many of the aspects of calibrations For example you can change the reflection percentage return loss used during magnitude calibrations for the standard You can also prevent the appli
98. ayed Key Path COPY DEFINE PLOT PLOT MEM ON off Specifies whether the markers and marker values are to be drawn or not drawn on the plot Key Path COPY DEFINE PLOT PLOT MKR ON off Provides two plot speeds FAST and SLOW Use SLOW for plotting directly on transparencies because the slower speed provides a more consistent line width A color plot can be prepared directly on a transparency so that the color is not lost in converting a paper plot to a transparency Key Path COPY DEFINE PLOT PLOT SPEED Selects plotting of all displayed text except limits table softkeys and marker values Key Path COPY DEFINE PLOT PLOT TEXT ON off Moves the limits horizontally by adding or subtracting an offset in stimulus value This allows limits already defined to be used for testing in a different stimulus range Key Path SYSTEM LIMIT MENU LIMIT LINE OFFSETS POSITION OFFSET 5 38 FINAL TRIM SIZE 7 5 in x 9 0 in POSITION VALU E PRESET PRINT Reference Keys Softkeys and Connectors Sets the starting distance or time value of a segment with the entry keys The ending value of the segment is defined by the start of the next segment No more than one segment can be defined over the same stimulus range Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE EDIT POSITION VALUE When this key is pressed the instrument performs a self test and then returns to predefined state The predefined state h
99. ble tools for pass fail testing on production lines The last section of this chapter shows you how to create hard copies of the display on a printer or plotter In addition to getting hardcopies of the screen the precision reflectometer can print or plot a listing of all measurement points and instrument parameters Contents Setting the Measurement Range 0 00 sese 3 4 To select the source wavelength _ 000 eee eee 3 6 To automatically tune to a response aaa 3 7 To change the displayed scale sss 3 7 To change the refractive index 02v e 3 8 Reducing Displayed Noise aaa 3 9 To reduce the displayed noise 6 aaa 3 11 Using Markers 2 2 0 0 iene tent e ene een nes 3 12 To display a peak response 2 0 0 ccc ne 3 16 To change the measurement range 0 eee 3 16 To make relative measurements 00 00 ee eee 3 16 To position a fixed reference marker kaaa aaa 3 17 To change the peak definition sss 3 17 To turn markers off sss I 3 18 Creating Limit Lines ssssssssssssssssssss sse 3 19 To enter limit line segments ao 3 23 To display or hide limit lines esses 3 23 To turn on limit testing 0 20 o 3 24 Tutorial Using Limit Lines aaa 3 25 Storing Traces to Memory sssssssssssss sse rrearen 3 34 To view memory traces 6 m 3 35 3 2 FINAL TR
100. cables the free end of the cable functions as the calibration standard This is possible because the percentage of light reflected by that type of cable connector is known For 1300 nm measurements the correct value is 15 dB 3 16 For 1550 nm the correct value is 14 7 dB 3 37 Other calibration standards cables connectors or devices may have other reflection values 18 If you are using the supplied cables press FRESNEL If you are using another standard perform the following steps a Obtain the standard s reflection return loss in dB b Enter this value using the USER STD softkey 19 Press MEASURE STANDARD and wait for the standard to be measured Connect Device Under 20 Connect the device to be tested to the TEST PORT cable Test 21 Press MEASURE DEVICE and then EXIT SETUP to complete the guided setup and begin device measurements log MAG 10 dB REF 58 dB START mm 1300 nm n l STOP 400 mm 2 16 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations 22 As you measure devices observe the following suggestions e Use the START and STOP CENTER and SPAN and marker keys to optimize the displayed response Reducing the span increases measurement speed improve resolution and increase dynamic range e To improve the signal to noise r
101. cation of calibration data to the measured data A full calibration consists of two procedures e Balance internal receiver e Magnitude calibration Both of these procedures are included in guided setups and guided calibrations This section shows you how to run these procedures separately As shown in the guided setup procedure there are slight differences between the steps used to calibrated devices with or without pigtails If the device has a pigtail during the balance receiver calibration the low reflection termination is connected directly to the TEST PORT connector instead of at the end of a cable During the magnitude calibration a fiber optic cable that is the same length as the pigtail is connected to the TEST PORT connector A magnitude calibration consists of measuring a standard of known reflection at the end of the TEST PORT cable The instrument then scales the measured response to match the amplitude of the standard so that the true value is displayed The fiber optic cables supplied with the precision reflectometer can be used as calibration standards This is because the cable s open end is a very accurate and repeatable calibration standard The insertion loss at the front panel connection is not taken into account The return loss of the fiber end of these cables is known to have the following values 1300 nm 2 een eee nee eens 15 dB 3 16 reflection 1550 NM 2 eee 14 7 dB 3 37 reflect
102. color of displayed error messages Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS WARNING a Use this key to terminate unitless entries such as an averaging factor ZERO SPAN on Sets the center to the former start value and stops the sweep mirror OFF movement In this mode the precision reflectometer is essentially a programmable delay line Key Path MENU ZERO SPAN on OFF 5 51 FINAL TRIM SIZE 7 5 in x 9 0 in Block Diagram Reference SOURCE BLOCK WAVELENGTH DIVISION MULTIPLEXER SOURCE ARM INPUT rear panel WAVELENGTH INDEPENDENT COUPLER LIGHTWAVE SECTION 7 70 EST PORT GREEN SOURCE OUTOUT CABLE CURRENT DRIVE amp MODULATOR TRANSLATION STAGE CORNER CUBE MIRROR PTT a MOTOR COLLIMATING POLARIZER amp CONTROL LENS RECEIVER BLOCK POLARIZATION DIVERSITY RECEIVER OPTICAL AM 77 SAMPLE RECEIVER ARM OUTPUT rear panel B REFERENCE EXTENSION OQ Oli DETECTOR amp ENVELOPE amp HOLD T BANDPASS DETECTOR z POLARIZATION FILTER MULTIPLEXEI CONTROLLER YELLOW RECEIVER INPUT CABLE gt DISPLAY AUX INPUT 1 vo I INTERCONNECT i 5 52 FINAL TRIM SIZE 7 5
103. complete the calibration a standard cable of known reflectance is used to calibrate the magnitude The displayed response is scaled to match the value specified for the standard in percentage of reflectance 2 6 FINAL TRIM SIZE 7 5 in x 9 0 in Select cables Performing Guided Setups and Calibrations Running Guided Setups and Calibrations To perform a guided setup devices with pigtail l Press PRESET and then GUIDED SETUP 2 Press a softkey to select the wavelength 3 Press CLASSIFY DEVICE and then PIGTAIL 4 Press CONNECT CABLES 5 Measure the length of the device s pigtail Include the length of any additional cable used to connect the device to the front panel TEST PORT connector 6 Based on the length measured in the preceding step use the following chart to assemble a fiber optic cable for the reference path 2 7 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations Cable Lengths Length of Path Assemble this Length of Path Assemble this for Tested Device Cable for Tested Device Cable 40 65 40 225 250 50 175 50 75 50 240 265 40 50 150 75 100 75 250 275 75 175 90 115 40 50 269 290 40 50 175 00 125 00 275 300 00 175 5 140 40 75 290 315 40 75 175 25 150 25 300 325 75 125 4
104. d 4 20 COLOR command 4 21 colors changing 3 45 COLOR softkey 4 21 4 44 5 17 QQCQCCCOQ Q command common 4 12 names 4 7 ueries 4 6 versus keys 4 54 computer address 4 4 CONFIGURE PLOT softkey 5 17 connector care 1 21 CONT command 4 2 CONTINUOUS softkey 4 21 5 17 COPYFRFT command 4 21 COPY FROM FILE TITLE softkey 4 21 5 17 COPY FROM REG TITLES softkey 4 21 5 18 COPYFRRT command 4 21 COPY key 5 17 menu map 5 4 CORR command 4 2 correction 5 18 ata 2 22 CORRECTION CONSTANTS NOT STORED error message 7 4 CORRECTION on OFF softkey 4 21 5 18 cotton swabs part number 5 54 C status notation vii 5 16 D4 adapter 5 53 DATA and MEMORY softkey 4 24 5 19 DATA ARRAY on OFF softkey 4 25 4 26 5 19 DATA LIMIT LN softkey 5 19 DATA MEMORY 1 softkey 3 35 5 18 DATA MEM softkey 4 22 data trace 3 18 3 34 3 45 DATI command 4 22 DEBU command 4 22 Index 6 FINAL TRIM SIZE 7 5 in x 9 0 in debugging programs 4 5 DEFAULT COLORS softkey 4 22 5 19 ault plotting values 5 19 FAULT SETUP softkey 4 23 FAULT SETUPS softkey 5 19 FC command 4 22 E PEAK softkey 3 17 5 20 PLOT softkey 4 43 5 20 STORE softkey 5 20 ay line 5 51 LETE softkey 4 48 5 20 LO command 4 22 LR command 4 22 LRFIXM command 4 22 LTA LIMITS softkey 4 31 5 20 a markers 3 12 LT command 4 23 Diamond HMS 10 adapter 5 53 N 47256 adapter 5 53 d
105. d SPAN keys Then use the front panel knob step keys or numeric key pad to enter the value Annotation that is displayed on the sceen shows measurement settings such as source wavelength vertical and horizontal scales reference level and refractive index You can zoom to responses swiftly using automated search and scale functions As you use the instrument notice that reducing the span makes sweep speed faster and increases the measurement sensitivity Vertical Value at Scale Reference Line log MAG 18 dB REF 56 dB tp c Aug 15 Reference Line bh il e CENTER 316 74 mm 1388 nm n l SPAN ZB mm Source o Refractive Wavelength Index display 3 4 FINAL TRIM SIZE 7 5 in x 9 0 in Horizontal scale readings depend upon refractive index Performing Measurements Setting the Measurement Range The precision reflectometer s maximum measurement span depends upon the refractive index of the light path The default horizontal scale corresponds to a refractive index 7 of 1 This is the value for light in air and it gives the precision reflectometer s maximum range of 400 mm Entering a different refractive index using the REFRACTIVE INDEX m softkey changes the horizontal scale but not the position of responses on the display log MAG 10 dB REF 58 dB 24 20 046 dB leg MAG 10 dB REF 50 dB Z4 21 268 dB MARK 2 FEXED NKR ise
106. d of the TEST PORT cable Do not connect the termination to the front panel connector as suggested on the screen Low Reflection Termination Adjust the two front panel REFERENCE POLARIZATION BALANCE knobs until the line is in the shaded area See the following figure Adjust vector line to be within shaded greg shown Press DONE Disconnect the low reflection termination from the fiber optic cable Press FRESNEL and then MEASURE STANDARD The end of the cable is providing a Fresnel standard Wait until the asterisk on the display s left hand side disappears and the letter C remains below the asterisk FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 5 Verify Operation 14 You should see a Fresnel response on the display due to a reflection from the end of the test port cable If the response is missing check the following and repeat this procedure from the beginning o Are the the front panel cables properly connected rj Are the rear panel cables attached to the correct connectors log MAG 14 dB REF 58 dB ma START mm 1399 nm n l STOP 488 mm Fresnel response 15 Press MKR FCTN MAX SEARCH and then MKR ZOOM This expands the display around the Fresnel response Wait for the response to move to the center of the display 16 Press MAX SEARCH and read the marker s amplitude value on the display If the value is n
107. d reflection impulse The peak value decreases monotonically as a function of the length of the dispersion mismatch This effect is consistent and has been corrected out by the precision reflectometer The instrument assumes a dispersion coefficient of 17 ps nm km The result of this correction leaves a residual error on the order of 0 3 dB If the path to the device being tested is both in fiber and an open beam the effects are very difficult to remove from the measurement subsequent uncertainties due to chromatic dispersion can approach 5 dB In addition to the internal 1300 nm and 1550 nm sources you can use an external source for measurements The external source input is provided as a convenience for users with very advanced applications It is not meant for the typical user The external source must be able to be modulated with a 27 kHz signal When using an external source normal calibration and correction features are not applied to the measurement data Refer to To calibrate for an external source to learn how to calibrate the precision reflectometer for use with an external source 2 22 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Performing Manual Calibrations To balance the receiver Turn the precision reflectometer on and allow it to warm up for at least one hour Locate two fiber optic cables that are of equal length If you plan to measure a device that h
108. dress 4 8 Monitoring the Instrument D 4 9 IEEE 488 2 Common Commands 4 12 Instrument Commands 4 15 Keys versus Commands 4 54 5 Reference Menu Maps 5 3 Keys Softkeys and Connectors 5 11 Block Diagram 5 52 Front Panel Fiber Optic Adapter 5 53 Part Numbers 5 54 Instrument Options 5 55 Line Power Cables 5 56 6 Specifications and Regulatory Information Specifications 6 4 LED Classification 6 4 Return Loss Measurement Range 6 5 Return Loss Uncertainty 6 6 Sweep to Sweep Repeatability 6 8 Two Event Spatial Accuracy 6 9 Two Event Spatial Resolution 6 10 Spurious Responses 6 12 Characteristics 6 14 Regulatory Information 6 16 Notice for Germany Noise Declaration 6 16 7 Error Messages Message Definitions 7 3 Error Message Numbers 7 11 Index Contents 3 FINAL TRIM SIZE 7 5 in x 9 0 in Contents FINAL TRIM SIZE 7 5 in x 9 0 in Installing FINAL TRIM SIZE 7 5 in x 9 0 in WARNING WARNING CAUTION CAUTION Installing This chapter shows you how to install your precision reflectometer and how to verify that it is operating properly Be sure to save the shipping containers in the event that the instrument should need to be returned to HP It is important to have the correct packaging Refer to Chapter 6 for information on operating conditions such as temperature If you should ever need to clean the cabinet use a damp cloth only
109. e Depends on table type Equivalent softkey SYSTEM SEGMENT EDIT Makes a single measurement sweep then sets the hold mode Syntax SING Equivalent softkey MEAS SINGLE 4 48 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Instrument Commands SOFR Display the firmware revision in the active entry area Syntax SOFR Equivalent softkey SYSTEM SERVICE MENU SOUR1300 Select 1300 nm source Syntax S0UR1300 Equivalent softkey MENU 1300 nm SOUR1550 Select 1550 nm source Syntax SOUR1550 Equivalent softkey MENU 1550 nm SOUREXT Select external source and set wavelength Syntax SQUREXT lt value gt Item Description value 1200 to 1600 Equivalent softkey MENU EXTERNAL SOUROFF Turn off internal sources Syntax SOUROFF Equivalent softkey SOURCE OFF SPAN Sets the stimulus span Syntax SPAN value suffix Item Description value Domain dependent suffix DB MM UM NM S MS US NS PS FS 4 49 FINAL TRIM SIZE 7 5 in x 9 0 in SRE STAR STB STOP STOR Programming Instrument Commands Equivalent softkey MENU SPAN Service request enable The value is the mask which enables specific bits in the status byte for generating an SRQ Syntax SRE lt value gt Defines the start stimulus value Syntax STAR lt value gt suffix Item Description value Domain dependent suffix DB MM UM NM S MS US N
110. e following equipment e HP 71450A or HP 71451A optical spectrum analyzers with Option 002 built in white light source e 8702 or 8703 lightwave component analyzer system e 83420 lightwave test set with an 8510 network analyzer e 8153 lightwave multimeter with a source and power sensor module 1 24 FINAL TRIM SIZE 7 5 in x 9 0 in Installing Cleaning Connections for Accurate Measurements To test return loss Use an appropriate lightwave source a lightwave receiver and lightwave coupler to test return loss Examples of test equipment configurations include the following equipment e 8703 lightwave component analyzer e 8702 analyzer with the appropriate source receiver and lightwave coupler e 8504 precision reflectometer e 8153 lightwave multimeter with a source and power sensor module in conjunction with a lightwave coupler e 81554SM dual source and 81534A return loss module 1 25 FINAL TRIM SIZE 7 5 in x 9 0 in Returning Your Instrument It is unlikely that your precision reflectometer should need to be returned to Agilent Technologies However if you do need to return it repackage the instrument using the original shipping containers and materials or their equivalents Agilent Technologies offices can provide packaging materials identical to the original materials Packaging materials not specified can result in instrument damage Never use styrene pellets to package electronic instruments The
111. e current address for the external disk drive The default address is 00 5 Press ADDRESS DISK and enter the new address if the displayed address does not match the disk drive s actual address 6 Press x1 to enter the new address 7 Press RETURN 8 Press DISK UNIT NUMBER enter the unit number and press x1 The unit number is typically 0 or 1 and refers to an individual disk drive slot 9 Press VOLUME NUMBER enter the volume number and press x1 Volume numbers are used for hard disk drives So for reading disks the volume number should be 0 3 44 FINAL TRIM SIZE 7 5 in x 9 0 in Changing Colors and Audible Warnings The precision reflectometer uses colors to highlight the difference between data and memory traces the reference line the graticule warning text and annotation You can change the color tint and brightness of each of these items An audible beep sounds each time you save an instrument state or place a trace into memory You can prevent this beep from sounding In addition the instrument can be configured so that a beep sounds each time that a cautionary message is displayed on the screen To adjust displayed colors 1 Press DISPLAY 2 Press MORE and then ADJUST DISPLAY Press INTENSITY BACKGROUND INTENSITY and MODIFY COLORS to adjust the display Press SAVE COLORS softkey to save your custom colors Press DEFAULT COLORS to return the dis
112. e exchanged with a compatible computer The learn string and user graphics display data are always stored in binary format because they are useful only to the reflectometer They should not be modified with an external computer The following data is formatted Each array is stored separately Data arrays corrected Raw data arrays Formatted array Display memory array Key Path SAVE STORE TO DISK DEFINE STORE DISK FILE FORMAT ASCII 5 13 FINAL TRIM SIZE 7 5 in x 9 0 in AUTO FF ON off AUTO SCALE AUX INPUT connector we Avg status notation AVERAGING FACTOR AVERAGING on OFF AVERAGING RESTART Reference Keys Softkeys and Connectors Causes an external printer to automatically form feed to the next page after printing one page of information Key Path COPY PRINT PLOT SETUPS AUTO FF ON off Sets the scale and reference values to display all of the trace data as large as possible on the screen without cutting off any of it Key Path SCALE REF AUTO SCALE This rear panel connection is used to connect DC or AC voltages from the lightwave section to the display processor section for display and measurement processing Displays a menu of functions that are used to reduce any displayed noise Indicates that sweep to sweep averaging is on The averaging count is shown immediately below this notation Sets the number of traces that are averaged together The range is from 1 to 999 Key P
113. e safe operation and to maintain the instrument in a safe condition ili FINAL TRIM SIZE 7 5 in x 9 0 in The 8504B at a glance The 8504B precision reflectometer is a high resolution interferometer that measures return loss It is optimized for single mode fiber but useful measurements can also be made in multi mode fiber The precision reflectometer performs measurements at 1300 nm and 1550 nm wavelengths Typical applications include e Measurements of launch optics for lasers and opto electronic integrated circuits e Measurements of passive fiber optic devices such as couplers attenuators connectors and isolators High resolution measurements of lightwave path discontinuities based on a known refractive index e Measurement of refractive index of material based on a known distance between two discontinuities High resolution measurement of path length expressed as transit time e Measurements of bulk optic devices such as lenses AR coatings and crystals FINAL TRIM SIZE 7 5 in x 9 0 in Using the precision reflectometer you can display multiple reflections from the device that you are testing For example the following figure shows an LED device with five reflective surfaces For each surface the figure shows the corresponding response on the precision reflectometer s display Beveled Fiber Lens LED Incident Light Reflected Light log MAG 1 dB REF 5H dB
114. e scale is used response values are displayed in dB when a linear amplitude scale is used values are shown as the ratio of reflected power to the incident power The displayed marker values are valid even when the measured data is above or below the range displayed on the screen When displaying delta markers any of the four markers or a fixed point can be designated as the reference marker The displayed markers show the relative distance or time and amplitude from this reference marker The delta reference is displayed as a small A character This character is smaller than the inactive marker triangles If one of the markers is the reference the delta character appears next to the marker number on the trace Each of the four standard markers can only be positioned on the trace However the fixed marker can be position anywhere on the screen it is not limited to the trace Use FIXED MKR POSITION and FIXED MKR VALUE to position the fixed marker The fixed marker can be set to the current active marker position by pressing MARKER FIXED MARKER Other markers can then be activated and their values referenced to the fixed marker If both data and memory are displayed the marker values apply to the data trace If memory only is displayed the marker values apply to the memory trace You can change the amplitude variation required for a peak to be identified The default value is 6 dB The value specifies the amount that a trace must i
115. eclaration covers all options of the above product Is in conformity with Safety IEC 61010 1 1990 A1 1992 A2 1995 EN 61010 1 1994 A2 1995 CAN CSA C22 2 No 1010 1 92 EMC CISPR 11 1990 EN 55011 1991 Group 1 Class A IEC 61000 4 2 1995 A1 1998 EN 61000 4 2 1995 4 kV CD 8 kV AD IEC 61000 4 3 1995 EN 61000 4 3 1995 3 V m 80 1000 MHz IEC 61000 4 4 1995 EN 61000 4 4 1995 0 5 kV sig lines 1 kV pow lines IEC 61000 4 5 1995 EN 61000 4 5 1995 0 5 kV I l 1 kV l e IEC 61000 4 6 1996 EN 61000 4 6 1996 3V 80 AM power line IEC 61000 4 11 1994 EN 61000 4 11 1994 100 20 ms Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC and carries the CE marking accordingly Santa Rosa CA USA 20 June 2001 pa Greg Pfeiffer Quality Engineering Manager For further information please contact your local Agitent Technologies sales office agent or distributor Rev B FINAL TRIM SIZE 7 5 in x 9 0 in 6 17 Specifications and Regulatory Information FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages FINAL TRIM SIZE 7 5 in x 9 0 in Contents Error Messages This section lists the error messages that may be displayed or transmitted by the instrument over GPIB Each error message is accompanied by an explanation and suggestions to help solve the problem Some messages are for information only and
116. ecting cables 1 22 shipment 1 4 instrument sections 1 5 instrument options 5 55 INSTRUMENT STATE MEMORY CLEARED error message 7 6 instrument states saving to file 3 40 saving to registers 3 36 INSUFFICIENT MEMORY error message 7 6 INTE command 4 29 INTENSITY softkey 4 29 5 27 internal registers 3 36 Index 10 FINAL TRIM SIZE 7 5 in x 9 0 in NVALID KEY error message 7 6 O INTERCONNECT cable part number 5 54 O INTERCONNECT connector 5 28 key codes 4 80 KEY command 4 30 KOR command 4 31 LaserJet 3 47 earn string 3 36 LED Classification 6 4 LEFL command 4 31 LEFT LOWER softkey 4 31 5 28 LEFT UPPER softkey 4 31 5 28 LEFU command 4 31 D command 4 31 AMPO command 4 31 LINE command 4 32 MAOF command 4 32 POSO command 4 32 TEST command 4 32 T LINE OFFSETS softkey 5 28 T LINE on off softkey 4 32 T LINE on OFF softkey 3 23 5 28 limit lines 3 19 beep on failures 5 15 entering 3 23 pass fail 3 22 3 24 segment types 3 21 tutorial 3 25 T MENU softkey 3 19 5 28 T TEST on off softkey 4 32 T TEST on OFF softkey 3 24 5 28 T TYPE softkey 4 33 5 29 L command 4 32 M command 4 33 P command 4 33 T command 4 33 U command 4 33 E ZZ22Z2Z22Z2 222 E 2 2 2 2 2 2 2 z2 zZ line power cables 5 56 voltage 1 7 line fuse replacing 1 19 LINE TYPE DATA softkey 5 29 LINE TYPE MEMORY softkey 4 34 5 29 LIN MAG softkey 3
117. en holds Hold freezes the current data trace on the screen Key Path MEAS TRIGGER HOLD Sets the upper limit response value for the start of the segment If a lower limit is specified an upper limit must also be defined If no upper limit is required for a particular measurement force the upper limit value out of range for example 200 dB When UPPER LIMIT or LOWER LIMIT is pressed all the segments in the table are displayed in terms of upper and lower limits even if they were defined as delta limits and middle value If you attempt to set an upper limit that is lower than the lower limit or vice versa both limits will be automatically set to the same value Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE EDIT UPPER LIMIT 5 49 FINAL TRIM SIZE 7 5 in x 9 0 in USE PASS CONTROL USER STD 10 dB VERT LOG MAG VGA connector VOLUME NUMBER Reference Keys Softkeys and Connectors Allows control of the 8504B with the computer over HP IB as with the talker listener mode and also allows the 8504B to become the active controller in order to plot print or directly access an external disk During this peripheral operation the host computer is free to perform other internal tasks that do not require use of the bus The bus is tied up by the 8504B during this time The pass control mode requires that the external controller is programmed to respond to a request for control and to issue a take control co
118. ence Keys Softkeys and Connectors Leads to the limit type menu where one of three segment types can be selected Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE LIMIT TYPE Displays the magnitude data in linear format This format is scaled but unitless Key Path FORMAT LIN MAG Selects the line type for plotting the data trace The default line type is 7 which is a solid unbroken line Key Path COPY CONFIGURE PLOT LINE TYPE DATA Selects the line type for plotting the memory trace The default line type is 7 which is a solid unbroken line Key Path COPY CONFIGURE PLOT LINE TYPE MEMORY Provides a tabular listing of all the measured stimulus points and their current data values together with limit information if it is turned on At the same time the screen menu is presented to enable hard copy listings and access new pages of the table Thirty lines of data maximum are listed on 14 pages screens Up to five columns of information are provided The specific information listed for each measured stimulus point varies depending on the display format and the limit testing status If limit testing is on an asterisk is listed next to any measured value that is out of limits If limit lines are on and other listed data allows sufficient space the limits are listed together with the margin by which the device data passes or fails the nearest limit Key Path COPY LIST VALUES 5 29 FINAL TRIM SIZE
119. ent Commands Sets value of n group index of refraction of the medium under test Rescales horizontal axis when distance format is selected This command is equivalent to the GROI command Syntax INDEREFR lt value gt Outputs the identification string HEWLETT PACKARD HP 8504B 0 X XX where X XX is the firmware revision This command is identical to the OUTPIDEN command Syntax IDN Initializes the disk Logical Interchange Format LIF Syntax INID Equivalent softkey MEAS INITIALIZE DISK Inputs the error corrected data The reflectometer will stop sweeping and display the data Syntax INPUDATA lt value gt Item Description value Complex number Data format data 0 Inputs formatted data The reflectometer will stop sweeping and display the data Syntax INPUFORM lt value gt Item Description value Complex number Data format data 0 4 28 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Instrument Commands INPULEAS Input a learn string previously obtained by the OUTPLEAS command This command is equivalent to the LRN command Syntax INPULEAS lt value gt INPURAWI Inputs raw data The reflectometer will stop sweeping and display the data Syntax INPURAW1 lt value gt Item Description value Complex number Data format data1 data2 INTE Sets the display intensity as a percent of the brightest setting Syntax INTE
120. ents Setting the Measurement Range To automatically tune to a response 1 Press MKR FCTN 2 Press MAX SEARCH 3 If the marker is not on the desired response use the front panel knob to place the marker on the response 4 Press MKR ZOOM as needed to center the response and reduce the measurement span 5 Press and then AUTO SCALE To change the displayed scale 1 Press FORMAT 2 Select the horizontal measurement units e DISTANCE TIME 3 Select the vertical scale e VERT LOG MAG selects a logarithmic scale LIN MAG selects a linear scale 4 Press SCALE REF 5 Press REFERENCE VALUE and enter the value at the reference position line The reference position line s default position is at the center of the screen 6 Press SCALE DIV and enter the desired units per vertical division 3 7 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Setting the Measurement Range To change the refractive index 1 Press MEAS 2 Press REFRACTIVE INDEX n and enter a refractive index value from 1 to 200 The default value is 1 3 8 FINAL TRIM SIZE 7 5 in x 9 0 in Reducing Displayed Noise The precision reflectometer can average the data from several traces Averaging reduces displayed noise especially when used with narrow spans For best accuracy use averaging on the minimum span log MAG 5 dB REF 70 dB log MAG 5 dB REF 70 dB
121. er have a 3 dB valley between them averaging off Za 3 dB The 8504B is basically a scanning Michelson interferometer The test port arm is made up entirely of non dispersion shifted fiber while the reference arm contains a fiber portion as well as the variable open beam portion of the scanning mirror of the interferometer This situation does not affect the resolution at 1300 nm However at 1550 nm it results in a differential dispersion between the two arms of the interferometer which is seen as a pulse broadening on the display of the 8504B Precision Reflectometer This pulse broadening degrades the two event resolution at 1550 nm having minimal effect when the open beam path in the reference arm of the interferometer is short mirror near the start of its scan range but increases as the open beam path becomes longer FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information Specifications Specification Two event Spatial Resolution 1300 nm span 1 mm 25 microns 1550 nm lspan 1 2 mm Dependent upon mirror position as shown in the following graph Two event spatial resolution ym 1550 nm um 300 250 E gt 200 c o 2 150 o Ur o e 100 50 0 I O 50 100 150 200 250 300 350 400 Position of mirror mm spatial 6 11 FINAL TRIM SIZE 7 5 in x 9 0 in Description Specification Specifications and S
122. er signal levels The specified uncertainty does not include the connector loss or the calibration standard uncertainty The return loss uncertainty graph for the 1550 nm source applies to the mirror position range of 0 to 100 mm The uncertainty is degraded near 80 dB for mirror positions between 100 and 400 mm due to dispersion effects Refer to Characteristics in this chapter for information on the noise floor Return loss uncertainty specification applies with minimum span averaging on and the averaging factor set to 50 For 1300 nm the minimum span is 1 mm For 1550 nm the minimum span is 1 2 mm For 1550 nm dispersion correction must be enabled and the specification applies over the 0 to 100 mm mirror position range 6 6 FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information Specifications 4 2 a 2 O gt E 5 2 Q c 3 4 6 1 20 40 60 80 Displayed value dB retrnlos 1300 nm Specification 4 2 a 2 O gt E 5 2 Q c 3 4 6 1 20 40 60 80 Displayed value dB retrnlos 1550 nm Specification 6 7 FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information Specifications Sweep to Sweep Repeatability Description Sweep to sweep repeatability is the sweep to sweep amplitude variation see
123. esponse is not visible perform the following steps Press CAL CALIBRATE MENU andthen BALANCE RECEIVER a b Follow the prompts on the screen Then press DONE c Wait for one full sweep to complete d Press AVG and then AVERAGING ON e Wait for the instrument to average 16 sweeps On the left side of the graticule the Avg number will count to 16 f Press SYSTEM and then GUIDED SETUP and follow the prompts on the screen Press CONNECT TERMINATION Disconnect the device from the TEST PORT cable Use the supplied adapter to connect the low reflection termination to the TEST PORT cable Low Reflection Termination Press BALANCE RECEIVER Adjust the two polarization balance knobs until the line is in the shaded area 2 14 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations AS Adjust vector line to be within shaded greg shown 16 Press DONE NOTE After balancing the receiver do not move the extension cable or the balance knobs Movement degrades measurement accuracy FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations Calibrate Magnitude 17 Disconnect the termination and adapter from the TEST PORT cable Fresnel calibration standard The free end of the TEST PORT cable serves as the Fresnel calibration standard When using the supplied
124. est peak which is greater than the current peak Key Path MKR FCTN PEAK SEARCH NEXT PEAK HIGHER Finds the next peak to the left of the current marker position Key Path MKR FCTN PEAK SEARCH NEXT PEAK LEFT Finds the largest peak which is smaller than the current peak Key Path MKR FCTN PEAK SEARCH NEXT PEAK LOWER Finds the next peak to the right of the current marker position Key Path MKR FCTN PEAK SEARCH NEXT PEAK RIGHT Provides a tabular listing of key parameters The screen menu allows printing or plotting of the parameters visible or paging through two pages of information The information consists of marker and system parameters System parameters relate to control of peripheral devices Key Path COPY OP PARMS MKRS etc 5 35 FINAL TRIM SIZE 7 5 in x 9 0 in OUTPUT TO AUX INPUT connector OVL status notation PEAK EXCURSION PEAK SEARCH PEAK THRESHOLD PEAK TRACK on OFF Reference Keys Softkeys and Connectors This rear panel connection is used to connect DC or AC voltages from the lightwave section to the display processor for display and measurement processing Indicates that the amplitude of the source is too large for the current application Defines what constitutes a peak in the trace The value specifies the amount that a trace must increase and then decrease relative to the surrounding responses or noise floors in order to be defined as a peak Upon entering a va
125. et oo 4 oo gt 3 gt e c During balance receiver calibration the TEST PORT cable is terminated with a low reflection ermination This means substantially that the only light that hits both receiver detector diodes is from irror in the reference light path The polarization of this light is then adjusted by the front panel reference polarization balance knobs such that the responses from each detector are equal or balanced Subsequent measurements of polarization independent return loss are then insensitive to polarization transformations of the fiber in the test arm 2 21 FINAL TRIM SIZE 7 5 in x 9 0 in Reduce the effects of chromatic dispersion at 1550 nm External sources can be used Performing Guided Setups and Calibrations Performing Manual Calibrations You can turn off the use of chromatic dispersion correction data This allows you to use your own correction methods When making measurements at 1550 nm the amount of chromatic dispersion experienced by the light traveling in the reference path will be less than that in the path of the device being tested This is due to that fact that in most cases light traveling in the path with the device being tested is all in fiber However part of the reference path is in an open beam inside the 8504B This mismatch in dispersion results in a broadening and subsequent drop in the peak value of the displaye
126. ey Path LOCAL SYSTEM CONTROLLER This HP IB mode normally used for remote programming of the 8504B In this mode the 8504B and all peripheral devices are controlled by the external controller The controller can command the 8504B to talk and the plotter or other device to listen The 8504B and peripheral devices cannot talk directly to each other unless the computer sets up a data path between them A talker is a device capable of sending out data when it is addressed to talk There can be only one talker at any given time The 8504B is a talker when it sends information over the bus A listener is a device capable of receiving data when it is addressed to listen There can be any number of listeners at any given time The 8504B is a listener when it is controlled over the bus by a computer Press this key to abort a print or plot in progress 5 47 FINAL TRIM SIZE 7 5 in x 9 0 in TEST PORT TEXT TIME TINT TITLE TITLE FILEn Reference Keys Softkeys and Connectors Key Path LOCAL TALKER LISTENER The device being measured is connected to this front panel output connector The output at this connector is 1300 nn or 1550 nm at the power level listed in Characteristics in Chapter 6 Refer to Block Diagram in this chapter Presents softkeys for changing the tint brightness and color of displayed text Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS TEXT This mode sets the horizontal
127. fety Class 1 Product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside of the instrument is likely to make the instrument dangerous Intentional interruption is prohibited Always use the three prong AC power cord supplied with this instrument Failure to ensure adequate earth grounding by not using this cord may cause instrument damage 1 Connect the I O interconnect cable between the display processor and the lightwave section 2 Connect the BNC cable between the display processor and the lightwave section 3 Connect the power cable to display processor and the lightwave section Aux Input I O Interconnect BNC Cable instalo FINAL TRIM SIZE 7 5 in x 9 0 in Equipment Required Step 5 Verify Operation This step takes approximately 20 minutes to complete The following equipment is supplied with the precision reflectometer e Two 100 cm FC PC fiber optic cables e One fiber optic cable coupling adapter e One low reflection fiber optic termination EN Tighten connectors properly Over tightening or under tightening connectors can result in misalignment and nonrepeatable measurements Always finger tighten connectors in a consistent manner Refer to the manufacturer s data sheet for any torque recommendations
128. format and the limit testing status If limit testing is on an asterisk is listed next to any measured value that is out of limits If limit lines are on and other listed data allows sufficient space the limits are listed together with the margin by which the device data passes or fails the nearest limit e OP PARMS MKRS etc prints or plots a table of key parameters 4 Press COPY and then PRINT or PLOT To enter the printer plotter type and address 1 Press LocAL 2 Press SYSTEM CONTROLLER 3 Press SET ADDRESSES The display shows the default address for any printer or plotter Plotters are normally set to address 05 Printers are normally set to addrss 01 3 49 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements 4 If the displayed HP IB address of the printer does not match the printer s actual address press ADDRESS PRINTER and enter the correct address 5 If the displayed HP IB address of the plotter does not match the plotter s actual address press ADDRESS PLOTTER and enter the correct address 6 Press x1 to enter the new address To abort a print or plot 1 Press LOCAL 2 Press TALKER LISTENER 3 50 FINAL TRIM SIZE 7 5 in x 9 0 in Programming FINAL TRIM SIZE 7 5 in x 9 0 in Programming This chapter shows you how to prepare the instrument for programming and send and recieve programming commands and documents each precision reflectometer com
129. forming Measurements Creating Limit Lines DATA log MAG 18 dB REF 5B dB i 86 023 dB hp 25 mm C LIMIT POSITION OFFSET 1 342 mm I Ws sl otc Map dea CENT R 35 mm 1388 nm n l SPAN 28 mm The FAIL message FINAL TRIM SIZE 7 5 in x 9 0 in 3 33 Storing Traces to Memory The precision reflectometer places the current measurement data in what is known as the data trace This is the normal displayed trace that is updated with each sweep You can save the data trace into one of two temporary memory locations memory 1 and memory 2 Memory 1 and memory 2 can not be directly updated with each sweep You can view the data trace at the same time as a memory trace You can not view both memory 1 and memory 2 at the same time Memory traces are saved in instrument states D amp M1 log MAG 5 dB REF 7 dB Aug 16 Lii Add i ak RM Ri AA A LU CENTER 167 425 mm 1388 nm n l SPAN Z mm Both data and memory 1 traces displayed 3 34 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Storing Traces to Memory To view memory traces 1 Press DISPLAY 2 Press MEMORY 1 or MEMORY 2 to select the memory trace 3 Press DATA MEMORY 1 to save the data trace to the selected memory trace 4 Select the traces for display e DI
130. ge 47 66 Hz 115 230 Vac 10 Power consumptio 350 VA maximum Lightwave section Power requirements 50 60 Hz range 47 66 Hz 110 120 220 240 Vac 10 Power consumptio 200 V maximum Physical Specifications Weight 28 kg Dimensions IH x W x DI 3 0 x 460 x 570 mm 6 13 FINAL TRIM SIZE 7 5 in x 9 0 in Characteristics Compatible fiber 9125 um Source Characteristics 1300 nm 1550 nm Peak Wavelength 1308 30 nm 1550 30 nm Spectral Width 53 nm 55 nm Average Power 17 dBm 1 dBm Measurement span 1 to 400 mm Sweep Speed scan rate 1300 nm source 18 mm sec 56 msec mm 1550 nm source 2 mm sec 47 msec mm 1 Useful measurements are achievable with other fiber types but measurement performance may not be optimum 2 Spectral width is at full width half maximum 3 Average 4 This is he e uivalent distance in air and can be offset power levels are measured at the front panel TEST PORT connector y using fiber extension cables Return Loss Uncertainty Polarization Sensitivity Amplitude Fatness Versus Mirror Position Dispersion Effects 0 75 dB 1 0 dB 0 3 dB 1 All these items are independent and their effects are combined using a root sum of the square method 6 14 FINAL TRIM SIZE 7 5 in x 9 0 in Measurement Noise Floor Specifications and Regulatory Information Characteristics The instrument measurement noise floor
131. h operation has occurred but a data trace has not been previously stored in memory See DATA gt MEMORY under DISPLAY GPIB error number 54 NO VALID STATE IN REGISTER A request to recall an internal register has occurred but an instrument state has not been previously saved See SAVE GPIB error number 55 NOT ENOUGH SPACE ON DISK FOR STORE The disk is full purge files or replace with another disk GPIB error number 44 ONLY LETTERS AND NUMBERS ARE ALLOWED When titling a register or file only alphanumeric characters are allowed Rename the register file appropriately GPIB error number 43 OPTIONAL FUNCTION NOT INSTALLED An attempt has been made to use an optional function for which that option has not been installed GPIB error number 1 PLOTTER not on not connected wrong addrs The plotter does not respond to control Verify power to the plotter and check the GPIB connection between the reflectometer and the plotter Ensure that the plotter address recognized by the reflectometer matches the GPIB address set on the plotter itself GPIB error number 26 7 8 FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages Message Definitions PLOTTER NOT READY PINCH WHEELS UP The plotter is not ready to plot the paper has not been properly inserted or loaded GPIB error number 28 POWER SUPPLY HOT The power supply temperature has been sensed by the post regulator test or during self test Turn off the reflect
132. hanumberic characters first character must be alphabetic Equivalent softkey SAVE TITLE FILES 4 5 FINAL TRIM SIZE 7 5 in x 9 0 in TITL TITR TRIG UP USEPASC Programming Instrument Commands Sends the string to the title area on the display Syntax TITL lt string gt Item Description string Up to 53 characters Equivalent softkey DISPLAY TITLE Title the internal register associated with position 1 2 3 4 or 5 Used in conjunction with SAVE and RECA Syntax TITR 1 2 3 415 lt string gt Item Description string Up to 8 alphanumberic characters first character must be alphabetic Equivalent softkey SAVE TITLE REGISTER HP IB trigger Puts reflectometer into hold Syntax TRIG Increments the value in the active entry area This command is identical to pressing the up arrow key Syntax UP Puts the reflectometer in use pass control HP IB mode Syntax USEPASC Equivalent softkey LOCAL USE PASS CONTROL 4 52 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Instrument Commands WAIT Wait for a clean sweep Syntax WAIT ZERS Enables or disables zero span mode of operation Syntax ZERS ON OFF Equivalent softkey MENU ZERO SPAN on OFF 4 53 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Keys versus
133. he HP IB addresses are set at the factory and need not be modified for normal system operation 4 4 FINAL TRIM SIZE 7 5 in x 9 0 in Use the dehugging feature Programming Controlling the Instrument Default HP IB Addresses Instrument Address decimal 8504 16 Plotter 05 Printer 01 External Disk Drive 00 Controller 21 You can change the default HP IB addresses used by the precision reflectometer from the front panel These addresses are stored in short term non volatile memory and are not affected by preset or by cycling the power NOTE The reflectometer does not have an HP IB address switch The first time a program is run you should enable the precision reflectometer s debugging feature The this feature is on the reflectometer scrolls a history of incoming HP IB commands across the display in the title line Non printable characters are represented as 7 Any time a syntax error is received the commands stop and a pointer indicates the misunderstood character To turn on the debugging feature press LOCAL and then HP IB DIAG on OFF 4 5 FINAL TRIM SIZE 7 5 in x 9 0 in Send commands as ASCII strings Returning data to the controller Programming Controlling the Instrument Commands are sent to the precision reflectometer as ASCII strings The method used depends on the programming language and environment Using an PC with the HP IB Interface and Command Librar
134. in the HP IB status byte EE NE NOTE Limits are checked only at the actual measured data points f the point density is insufficient a device can be out of specification without displaying FAIL Be sure to specify a suitable number of measurement points Limit lines can be offset horizontally or vertically This is useful for changing the limits to correspond with a change in the test setup or for device specifications that differ in stimulus or amplitude It can also be used to move the limit lines away from the data trace temporarily for visual examination of trace detail EN NOTE The three offset keys AMPLITUDE OFFSET MARKER AMP OFE and POSITION OFFSET shift the limit segments but do not change the limit values in the table If the limit segments look out of place check to see if they have been shifted in position or amplitude 3 22 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Creating Limit Lines To enter limit line segments 1 Press SYSTEM 2 Press LIMIT MENU and then LIMIT LINE on OFF so that ON is highlighted 3 Press EDIT LIMIT LINE 4 For each segment that you want to add do the following a Press ADD and enter the limit line values POSITION VALUE and MARKER POSITION enter the starting position or time e UPPER LIMIT and LOWER LIMIT enters absolute amplitude limits DELTA LIMITS and MIDDLE VALUE enters limits equally spaced around a middle value
135. in the disk drive Refer to To format an external disk in this section 2 Press on the precision reflectometer 3 Press STORE TO DISK DEFINE STORE and then DISK FILE FORMAT 4 Select one of the following data formats e FORMAT BINARY provides faster more compact data storage ASCII save the data in the CITIfile format The CITIfile common instrumentation transfer and interchange file format is an ASCII format that is useful when data needs to be exchanged with a compatible computer The following data is stored separately in the file data arrays raw data arrays formatted array and display memory array 5 Press RETURN 6 Use the DATA ARRAY on OFF RAW ARRAY on OFF FORMAT ARY on DFF and GRAPHICS on OFF softkeys to select which measurement data you want saved in the file This allows you to save data from different levels in the data processing flow 7 Press RETURN 8 Press one of the STORE FILE softkeys to save the file 3 41 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Saving Instrument States to Files To change a file name 1 Press SAVE on the precision reflectometer 2 Press STORE TO DISK and then TITLE FILES 3 If you want to use the names used in the internal registers press READ FILE TITLES 4 Press the softkey for the file that you want to rename and then enter the filename Turn the front panel knob to position the arrow on a character Then press SELEC
136. in x 9 0 in Reference Front Panel Fiber Optic Adapters Front Panel The FC PC adapter is the standard adapter supplied with the instrument Fiber Optic Adapters ooOoo0o0000 FC PC HP 81000FI Biconic HP 81000WI D4 HP 81000GI Diamond HMS 10 DIN SC ST HP 81000AI HP 8100081 HP 81000KI HP 81000VI kent4s 5 53 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Part Numbers Item Agilent Part Number Fiber optic cable adapter 005 0089 Low reflection termination 005 0178 40 cm FC PC fiber optic cab e 005 0173 90 cm FC PC fiber optic cab e 005 0174 75 cm FC PC fiber optic cab e 005 0175 100 cm FC PC fiber optic cable 005 0176 125 cm FC PC fiber optic cable 005 0177 150 cm FC PC fiber optic cable 009 0171 Cable vay 08504 60030 Cotton swabs 8520 0023 Rear panel BNC cable 8120 1838 Rear panel 10 INTERCONNECT cable 08503 60051 Rear panel line power cable Fuse display processor section F3 0A 250V 2110 0780 Fuse lightwave section 100V and 120V operation F1 5A 250V 2110 0043 220V and 240V operation F0 75A 250V 2110 0083 1 Used to connect two FC PC fiber optic cables 2 Part of Option 001 Accessory Kit 3 Refer to Line Power Cables in this chapter for part number 5 54 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Instrument Options
137. ine power Cables 2 0 0 kaaa 5 56 5 2 FINAL TRIM SIZE 7 5 in x 9 0 in Menu Maps The menu maps in this section graphically represent the softkey menus that are displayed on the screen AVG AVERAGING RESTART AVERAGING FACTOR AVERAGING on OFF avgmenu CAL GUIDED CAL 1300 nm only MEASURE STANDARD BALANCE RECEIVER CORRECTION on OFF CALIBRATE MAGNITUDE CALIBRATE MENU DISPER COR on OFF FRESNEL 3 16 USER STD 10 RETURN EXIT 1550 nm only MEASURE STANDARD FRESNEL 3 37 USER STD 10 EXIT calmenu 5 3 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Menu Maps COPY PRINT STANDARD PLOT SELECT QUADRANT DEFINE PLOT CONFIGURE PLOT PRINT PLOT SETUPS LIST VALUES OP PARAMS MKRS etc PLOT DATA ON off PLOT MEM ON off PLOT GRAT ON off PLOT TEXT ON off PLOT MKR ON off SCALE PLOT FULL PLOT SPEED FAST RETURN PEN NUM DATA PEN NUM MEMORY PEN NUM GRATICULE PEN NUM TEXT PEN NUM MARKER LINE TYPE DATA LINE TYPE MEMORY RETURN PRINT STANDARD COLOR AUTO FF ON off PRINT STANDARDI DEFAULT SETUPS PLOT RETURN NEXT PAGE PREV PAGE RESTORE DISPLAY LEFT UPPER LEFT LOWER RIGHT UPPER RIGHT LOWER FULL PAGE RETURN copymenu 5 4 FINAL TRIM SIZE 7 5 in x 9 0 in DISPLAY DISPLAY DATA SELECT LETTER MEMORY DATA and MEMORY SPACE DATA gt MEMORY 1 MEMORY 1 BACK SPACE MEMO
138. ing Guided Setups and Calibrations Matched length cables During calibrations and subsequent measurements two cables must be ensure response is connected to the precision reflectometer One cable connects the device visible being measured to the front panel TEST PORT The other cable connects the front panel REFERENCE EXTENSION A and B connectors The REFERENCE EXTENSION cable must be equal in length or slightly shorter than the TEST PORT cable The relative lengths of these two cables determine the position of the Fresnel reflection from the end of the TEST PORT cable on the screen If the REFERENCE EXTENSION cable is too long or too short the measured response may not be visible on the screen This is shown in the following figure Response Response not visible i not visible y h 96 cm Device pigtail ocom or test port 100 em 11 cable length 100 em 22 100 em 27 Reference 100 em extension cable refcable Cahle lengths determine response position 2 4 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Changing the span does Any calibration performed in less than full span is still valid after the start or not affect calibrations stop values are changed Likewise a calibration performed in full span is still valid after the start or stop values are changed ZZ gCj ZC _ a Keep the reference cable stationary Do not move the
139. ing this key would rename the instrument state registers FILE1 through FILES If you have modified the names of the store files the modified names are copied to the instrument state save register names Key Path GAVE TITLE REGISTER COPY FROM FILE TITLE 5 17 FINAL TRIM SIZE 7 5 in x 9 0 in COPY FROM REG TITLES CORRECTION on OFF D status notation DATA MEMORY 1 Reference Keys Softkeys and Connectors Key Path SAVE STORE TO DISK TITLE FILES COPY FROM FILE TITLE Renames the store files to match the current names of the instrument state registers It does not change the names of any files already stored to disk For example the default names of the instrument state registers are REG1 through REGS The default file names of the store files are FILE1 through FILES Pressing this key would rename the store files REGI through REGS If the names of the instrument state save registers have been modified the modified names are copied to the store file names Key Path COPY FROM REG TITLES Turns on or off the application of balance receiver and magnitude calibration data When off default values are used The precision reflectometer turns correction on automatically after a calibration If the instrument is not calibrated and you attempt to turn correction on the error message CAUTION CALIBRATION REQUIRED appears on the display Turning correction off does not destroy the calibration data the calibratio
140. ion 2 20 FINAL TRIM SIZE 7 5 in x 9 0 in Ensuring accuracy of low level reflections Performing Guided Setups and Calibrations Performing Manual Calibrations The values listed above are derived from the following formulas 15 dB 10 Log 0 0316 14 7 dB 10 Log 0 0337 You can direct the precision reflectometer to use your own calibration standard values during a magnitude calibration Using your own optical device of known reflectance for a standard can improve dynamic accuracy When observing reflections at low levels perform the balance receiver calibration periodically after a full calibration to ensure better accuracy Periodically balancing the receiver helps to remove small drifts when displaying very small signals This drifting occurs most often when the instrument is not allowed to temperature stabilize for at least one hour prior to use EN Polarization balance calihration the inside story he receiver contains a polarization splitter that splits any incoming light into two orthogonal olarizations Refer to Block Diagram in Chapter 5 for a block diagram of the instrument A hotodiode mixes the optical fields reflected from the two arms of the interferometer and generates he interference signal in each polarization To ensure proper operation of the receiver the reference eflections needs to be about equally split between the two polarizations The balance receiver ation ensures that this condition is m
141. ion A REF FIXED Marker values are displayed in millimeters for distance format and picoseconds for time format In logarithmic magnitude format the vertical amplitude units are displayed in dB In linear magnitude format vertical amplitude is displayed in units This feature is especially usefull when used with MARKER A SPAN 5 30 FINAL TRIM SIZE 7 5 in x 9 0 in MARKER gt REFERENCE MARKER gt START MARKER gt STOP MARKER gt AMP OFS MARKER MIDDLE Reference Keys Softkeys and Connectors Key Path MKR FCTN MARKER FIXED MKR Key Path MKR MARKER FIXED MKR Sets the reference value equal to the value of the active marker In effect the marker moves to the reference line and moves the data trace with it Key Path SCALE REF MARKER REFERENCE Changes the distance or time start value to the value of the active marker Key Path MKR FCTN MARKER START Changes the distance or time stop value to the value of the active marker Key Path MKR FCTN MARKER STOP Uses the active marker to set the amplitude offset Move the marker to the desired middle value of the limits and press this softkey The limits are then moved so that they are centered an equal amount above and below the marker at that stimulus value Key Path SYSTEM LIMIT MENU LIMIT LINE OFFSETS MARKER AMP OFS Sets the midpoint for DELTA LIMITS using the active
142. isk address 4 4 drive 3 40 format 3 40 3 41 3 43 K FILE FORMAT softkey 4 47 5 21 HARDWARE PROBLEM error message 7 4 S WRITE PROTECTED error message 7 4 DIUM NOT INITIALIZED error message 7 5 SSAGE LENGTH ERROR error message 7 5 Ga on D Kh I GE 7 77g J A A A A A 1j a 1j N N N LI on D L 7 ZSJ EE A Ag on D BE Z ij S SK SK SK ME SK ME SK not on not connected wrong addrs error message 7 5 SKUNIT command 4 23 SK UNIT NUMBER softkey 4 23 5 21 S S S S S S S KVOLU command 4 23 K WEAR REPLACE DISK SOON error message 7 5 M command 4 23 PCOR command 4 23 PDATA command 4 23 PDATM command 4 24 PER COR on OFF softkey 5 21 SPER COR softkey 4 23 dispersion chromatic 2 22 display printing and plotting 3 47 DISPLAY DATA softkey 4 23 5 21 displayed noise 3 9 DISPLAY key 5 21 menu map 5 5 DISPMEMO command 4 24 DISP MKRS ON off softkey 4 23 DISTANCE softkey 3 7 eo UDnUDoUDcoundouuuvuoccccgcccd FINAL TRIM SIZE 7 5 in x 9 0 in Index 7 DIST command 4 24 DONE softkey 4 18 4 48 DOWN command 4 24 D status notation vii 5 18 dynamic accuracy 2 21 EDIT LIMIT LINE softkey 4 24 5 22 EDITLIML command 4 24 EDIT softkey 4 48 5 21 electrostatic discharge ili ENTO command 4 24 ENTRY OFF key 5 22 ERASE TITLE softkey 5 22 error messages 7 2 error messages
143. isk drive operating manual GPIB error number 46 7 5 FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages Message Definitions INITIALIZATION FAILED Disk initialization failed usually due to a damaged disk GPIB error number 47 INPUT ATTEMPTED WITHOUT SELECTING INPUT TYPE An INPU command has not been received but an attempt to transfer data occurred GPIB error number 32 INSTRUMENT STATE MEMORY CLEARED The five instrument state registers have been cleared from memory GPIB error number 56 INSUFFICIENT MEMORY The last front panel or GPIB request could not be implemented due to insufficient memory space See section 6 9 Save and Recall GPIB error number 51 INVALID KEY An undefined softkey was pressed GPIB error number 2 MOTOR COMMAND ERROR The motor controller has received an invalid command GPIB error number 101 MOTOR RESET FAILED Motor control failed to reset Check power cord and interconnect cable GPIB error number 99 MOTOR STOPPED EXCESSIVE POSITION ERROR Motor controller is unable to control position within accepable limits Press the PRESET key If error persists contact your Agilent Technologies Service Center GPIB error number 95 7 6 FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages Message Definitions MOTOR STOPPED NEGATIVE LIMIT Negative position limit exceeded Press the PRESET key If error persists contact your Agilent Technologies Service Center GPI
144. it segments 27 28 Performing Measurements Creating Limit Lines DATA log MAG 18 dB REF 5B dB 1 83 732 dB hp 35 mm C SEG POSITION nmi pper dB Lower dB TYPE 4 36 B H45 288 SP gt 5 37 BHB 745 Y 288 SP END I1 gol tef S diatur nee CENTER 35 mm 1388 nm n 1 SPAM Z8 mm Press DONE and LIMIT TEST ON off to turn on the limit testing Press LIMIT LINE OFFSETS and then POSITION OFFSET Rotate the front panel knob and observe that the limit line segments move back and forth The display shows a PASS or FAIL message depending on whether the peak response or the noise floor intersects one of the limits Position the limit lines so that the response peak intersects and causes the FAIL message 3 31 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Creating Limit Lines DATA log MAG 18 dB REF 5B dB il 54 B72 dB hp 25 mm C Y FASS erweelt tA et ap eA bafta CENTER 35 mm 1388 nm n l SPAN ZU mm The PASS message 29 Press AMPLITUDE OFFSET and rotate the knob again Usethe AMPLITUDE OFFSET cautiously because although they change the position of the limits they do not change the values in the table Nor is it evident that the values are offset Thus results can be misleading 3 32 FINAL TRIM SIZE 7 5 in x 9 0 in Per
145. l symbols Eight is the maximum number of characters C Press DONE to rename the file To recall a register 1 Press RECALL on the precision reflectometer 2 Press the softkey corresponding to the register that you want to recall 3 38 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Saving Instrument States to Registers To increase user memory 1 Press on the precision reflectometer 2 Press CLEAR REGISTER 3 Press the CLEAR REG softkeys to erase any unneeded registers The registers contents are erased 3 39 FINAL TRIM SIZE 7 5 in x 9 0 in Saving Instrument States to Files In order to use a disk you must have an HP IB compatible disk drive Up to 255 instrument state files can be stored on a disk Formatting a disk erases all existing data and prepares the disk to store new data The disk format used by the precision reflectometer is LIF logical interchange format LIF is compatible with HP 9000 Series 300 controllers LIF is not compatible with most PCs The reflectometer will not read from write to or format disks formatted by PCs except those having the HP 82300 HP BASIC language processor For information on transferring data from an LIF disk to a PC compatible disk contact your local sales and service office 3 40 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Saving Instrument States to Files To save to a disk 1 Place a formatted disk
146. line switch settings is a F3 0A 250V part number 2110 0780 Notice that an extra fuse is provided in a drawer located on the fuse holder 5 On the lightwave section use a flat blade screwdriver to pry open the line module cover door The cover door is hinged on the left side Pry beneath the tag that is located along the cover door s right side edge See the following figure 1 8 FINAL TRIM SIZE 7 5 in x 9 0 in CAUTION Installing Step 3 Set the line voltage Do not attempt to rotate the voltage selector cam while it is installed in the line module or non repairable damage will result The cam must be completely removed from the line module rotated to the proper position and 6 T 10 reinstalled Remove the voltage selector cam from the line module Rotate the voltage selector cam to the desired voltage When the line module cover is closed the selected voltage will be visible through a small window Insert the voltage selector cam back into the line module Verify that the value of the line voltage fuse in the pull out draw is correct The recommended fuse for 100V and 120V operation is a F1 5A 250V part number 2110 0043 The recommended fuse for 220V and 240V operation is a F0 75A 250V part number 2110 0063 Close the line module cover door 1 9 FINAL TRIM SIZE 7 5 in x 9 0 in WARNING CAUTION Step 4 Connect the rear panel cables This is a Sa
147. llowing figure Do not allow any more cable outside the cable tray than is necessary If the cable must be lengthened inside the tray by using two cables and an adapter put the connectors and adapter in the foam cutout inside the cable tray 3 Connect the remaining end of the fiber optic cable to the front panel REFERENCE EXTENSION A connector Fiber optic cable can be irrepairably damaged by bending it into circles with diameters less than 50 mm 2 inches This damage is mainly caused by stretching the cable 4 Attach the top onto the main body of the cable tray 2 29 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Performing Manual Calibrations Junction of strain reliefs and cables Cable Slots under cable Foam cutout for Connectors and Adapter Foam cutout for cables If splicing two together M Minim 27 cm 10 Finger slot to Equal length Super PC release top cover Optic Cables 2 30 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Once you ve calibrated the precision reflectometer you re ready to make measurements In this chapter you ll learn about changing the measurement range temporarily storing traces and changing the colors on the display You ll also learn how to use displayed markers and how to test the shape of displayed responses using limit lines Limit lines are valua
148. lt value gt Item Description value lo to 100 Equivalent softkey DISPLAY INTENSITY 4 29 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Instrument Commands KEY Inputs the key code for a hardkey or a softkey on the front panel This is equivalent to actually pressing a key Syntax KEY lt value gt Item Description value 0 to 49 R L T 5 e s H B STATUS Key Codes 4 30 FINAL TRIM SIZE 7 5 in x 9 0 in KOR LEFL LEFU LIMD LIMIAMPO Programming Instrument Commands Outputs a two byte key code or knob count If the number is positive two s complement the number is a key code if negative the number is an encoded knob count The knob count is decoded by clearing set to zero the first of the two bytes if bit 6 of the first byte is 0 The resulting combined value of the two bytes is the knob count positive or negative depending on whether the knob was turned counterclockwise or clockwise respectively Syntax KOR Sets the plot quadrant to left lower Syntax LEFL Equivalent softkey COPY LEFT LOWER Sets the plot quadrant to left upper Syntax LEFU Equivalent softkey COPY LEFT UPPER Sets the limits delta value from the specified middle value Syntax LIMD lt value gt suffix Item Description value Format dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softke
149. lue complete the entry with x1 Key Path MKR FCTN PEAK SEARCH DEFINE PEAK PEAK EXCURSION Selects the peak search menu which provides choices of the type of peak search desired Key Path MKR FCTN PEAK SEARCH Sets the level below which nothing will be considered a peak The maximum amplitude of the response must be at least this value to be called a peak The allowable threshold values range from 100 to 0 dB The default value is 70 dB Upon entering a value complete the entry with x1 Any part of a peak as defined by peak excursion that is less than the peak threshold value is also used to satisfy the peak excursion criteria For example when the peak excursion is set to 8 dB a peak that is 4 dB above and 4 dB below the peak threshold will be considered a peak Key Path MKR FCTN PEAK SEARCH DEFINE PEAK PEAK THRESHOLD Moves the active marker to the nearest peak if it is not on a peak when the function is enabled Peak tracking is updated when the function is first enabled and at the end of every sweep Key Path MKR FCTN PEAK SEARCH PEAK TRACK on OFF 5 36 FINAL TRIM SIZE 7 5 in x 9 0 in PEN NUM DATA PEN NUM GRATICULE PEN NUM MARKER PEN NUM MEMORY PEN NUM TEXT PLOT PLOT DATA ON off Reference Keys Softkeys and Connectors Selects the number of the pen to plot the data trace The default is pen number 1 Key Path COPY CONFIGURE PLOT PEN NUM DATA Selects
150. mand During remote control four front panel indicator lights show the current HP IB status These indicators are defined in the following table Displayed Status Indicators LED Indicator GPIB Mode R L T S Remote operation Listen mode Talk mode Service request SRQ status You can return the reflectometer to local front panel operation at any time by pressing the LOCAL key This is the only front panel key that is not disabled when the reflectometer is remotely controlled over HP IB by a computer 4 2 FINAL TRIM SIZE 7 5 in x 9 0 in Contents Programming Controlling the Instrument ssssssssssssssssss e 4 4 To select the HP IB mode sssssssssssss Ie 4 8 To change the HP IB address 4 aaa aaa 4 8 Monitoring the Instrument ssssssssssse cette nes 4 9 IEEE 488 2 Common Commands sssssssssssssssee eee 4 12 Instrument Commands ssssssssssssssssssss oarre aruanne 4 15 Keys versus Commands 0 0 0 ccc ccc cnet ence eee nes 4 54 4 3 FINAL TRIM SIZE 7 5 in x 9 0 in Controlling the Instrument Three HP IB modes are The precision reflectometer can be set to one of three HP IB modes available e Talker listener e System controller e Pass control The PRESET key does not affect the selected controller mode but cycling the power returns the precision reflectometer to the talker listener mode The talker listene
151. marker on the peak nearest its current position and while this function is on places the active marker at the nearest peak at the end of each sweep Syntax MARKPTRA ON OFF Equivalent softkey MKR FCTN PEAK TRACK on OFF Changes the reference value to the active marker s response value without changing the reference position Syntax MARKREF Equivalent softkey SCALE REF MARKER REFERENCE 4 37 FINAL TRIM SIZE 7 5 in x 9 0 in MARKSPAN MARKSTAR MARKSTOP MARKZERO MARKZOOM MAXS Programming Instrument Commands Changes the start and stop values of the stimulus span to the active marker and the delta reference marker Syntax MARKSPAN Equivalent softkey MKR FCTN MARKER A SPAN Changes the stimulus start value to the active marker value Syntax MARKSTAR Equivalent softkey MKR FCTN MARKER START Changes the stimulus stop value to the active marker value Syntax MARKSTOP Equivalent softkey MKR FCTN MARKER STOP Puts a fixed reference marker at the present active marker position and makes the fixed marker stimulus and response values at that position equal to zero This command is identical to the MARKFIXM command Syntax MARKZERO Equivalent softkey MKR or MKR FCTN MARKER FIXED MKR Sets active marker on nearest peak moves marker with peak to center and reduces span by one step 1 2 5 Syntax MARKZOOM Equivalent softkey MKR FCNT Moves the active
152. meter over HP IB 4 Limit failed Limit test failed Search failed A marker search was executed but the target value was not found 1 4 10 FINAL TRIM SIZE 7 5 in x 9 0 in Programming LLLLLLTT Event Message Check Event Request Status in Output E Statu o mx E Queue Regista B 128 64 ANS 32 16 8 an 4 2 1 A gt T TTT _ Ese 0 Omit Data Servi se LL a eee EVENT STATUS REGISTER B yp 98 98 op op 4p 4p 4p PPT o epe oe ie ome EVENT STATUS REGISTER Status Reporting Registers 4 11 FINAL TRIM SIZE 7 5 in x 9 0 in Programming IEEE 488 2 The following syntax notation conventions are used in this section Common CAPITAL Commands LETTERS U Capital letters indicate the short form of a command The actual command is not case sensitive and can be entered in upper or lower case Characters appearing in angular brackets indicate a constant a pre assigned simple or complex numeric variable or string variable transferred to the reflectometer A space may be inserted between it and the command Square brackets indicate that whatever occurs within the brackets is optional Braces are used to clarify which elements are to be chosen from Or indicates a choice of exactly one element from a list for example lt a gt lt b gt indicates lt a gt or lt b gt but not both 4 12 FINAL TRIM SIZE 7 5 in x 9 0 in CLS ESE ESR
153. mmand Then the peripheral operation is complete the 8504B passes control back to the computer In general use the talker listener mode for programming the 8504B unless direct peripheral access is required Key Path LOCAL USE PASS CONTROL Selects a reflectance percentage value when an optional user defined value is desired not necessarily 10 dB The default value is given as 10 dB and is changed using the knob number keys or step keys This process is used when you have an optical device of known reflectance that you can use to calibrate the magnitude This process improves dynamic accuracy Key Path CAL CALIBRATE MENU CALIBRATE MAGNITUDE USER STD 10 dB Displays the magnitude data in logarithmic format This is the standard format for displaying return loss in dB versus distance or time Key Path FORMAT VERT LOG MAG This rear panel connector is used to drive an external VGA display Specifies the volume number of the external disk to be accessed In general all 3 5 inch floppy disks are considered one volume volume 0 For hard disk drives such as the HP 9153A Winchester drive a switch in the disk drive must be set to define the number of volumes on the disk Refer to the individual disk drive manual for more information Key Path LOCAL VOLUME NUMBER 5 50 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Keys Softkeys and Connectors WARNING Presents softkeys for changing the tint brightness and
154. n data is recovered when correction is turned back on Key Path CAL CORRECTION on OFF Indicates chromatic dispersion correction is on This notation is available for the 1550 nm source only Refer to Performing Manual Calibrations in Chapter 2 for more information Stores the current trace data in the volitile memory unless the status notation is displayed at the screen s left side When memory 2 is active the key reads DATA MEMORY 2 indicates that the instrument has not completed a sweep after a parameter change Key Path DISPLAY DATA MEMORY 1 5 18 FINAL TRIM SIZE 7 5 in x 9 0 in DATA and MEMORY DATA ARRAY on OFF DATA LIMIT LN DEFAULT COLORS DEFAULT SETUPS Reference Keys Softkeys and Connectors Two temporary trace memories are available memory 1 and memory 2 If a trace has been stored in memory 1 or 2 this softkey displays two traces the current trace and the selected memory Use MEMORY 1 and MEMORY 2 to select the second displayed trace Key Path DISPLAY DATA and MEMORY Specifies whether or not to store error corrected calibration data on the disk with the instrument state Key Path SAVE STORE TO DISK DEFINE STORE DATA ARRAY on OFF Presents softkeys for changing the tint brightness and color of the data trace and limit lines Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS DATA LIMIT LN Returns all screen elements to their default f
155. n when measuring a known stable reflection It does not include noise effects when measuring reflections near the noise floor The repeatability is primarily a function of the mechanical mirror translation stage in the interferometer When evaluating this performance parameter it is important that the REFERENCE EXTENSION cables and the TEST PORT cable are held in place as movement of these components can affect the measurement Repeatability is measured with a 15 dB Fresnel reflection Specification Sweep To Sweep Repeatability 0 5 dB 6 8 FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information Specifications Two Event Spatial Accuracy Description Two event spatial accuracy is the accuracy with which the distance in air between two reflections can be measured when both reflections are displayed in the same sweep It does not include any error in the value of group refractive index which is entered by the user for measurements in various waveguide materials Specification Two event Spatial Accuracy 1 to 9 99 mm span 2 of span 10 to 400 mm span 1 of span 6 9 FINAL TRIM SIZE 7 5 in x 9 0 in Description Specifications and Regulatory Information Specifications Two Event Spatial Resolution Two event spatial resolution defines the physical spacing in air of two equal magnitude reflections such that the responses on the 8504B precision reflectomet
156. nce Keys Softkeys and Connectors Specifies which limit line segment in the table is to be modified A maximum of three sets of segment values are displayed at one time and the list can be scrolled up or down to show other segment entries Use the entry block controls to move the pointer gt to the desired segment number The indicated segment can then be edited or deleted Key Path SYSTEM LIMIT MENU EDIT LIMIT LINE SEGMENT Adds the character indicated by the arrow The active entry area displays the letters of the alphabet digits 0 through 9 and mathematical symbols Rotate the front panel knob until the arrow points at a letter and then press SELECT LETTER For titles shown on the display up to fifty characters and spaces can be added The mathematical symbols are not used when creating register titles Key Path DISPLAY TITLE SELECT LETTER Key Path SAVE TITLE REGISTER TITLE REGn SELECT LETTER Key Path SAVE STORE TO DISK TITLE FILES TITLE FILEn SELECT LETTER Accesses the select quadrant menu which allows drawing quarter page plots This is not used for printing Key Path COPY SELECT QUADRANT Accesses the address menu which is used to set the HP IB address of the precision reflectometer and to display and modify the addresses of peripheral devices in the system Key Path LOCAL SET ADDRESSES 5 44 FINAL TRIM SIZE 7 5 in x 9 0 in SINGLE SINGLE POINT SLOPING LINE SOURCE ARM
157. nce Menu Maps MENU FULL SPAM ZERO SPAN on OFF SOURCE OFF 1300 nm 1550 nm EXTERNAL menumenu 1 AREF MKR1 FIXED MKR POSITION AREF MKR2 FIXED MKR VALUE AREF MKR3 AREF MKR4 AREF FIXED MKR AOFF FIXED MKR FIXED MKR MENU RETURN RETURN mkrmenu FCTN MAX SEARCH MAX SEARCH PEAK EXCURSION MKR ZOOM PEAK TRACK on OFF PEAK THRESHOLD MARKER gt CENTER NEXT PEAK RIGHT MARKER A gt SPAN NEXT PEAK LEFT MARKER gt START NEXT PEAK HIGHER MARKER gt STOP NEXT PEAK LOWER MARKER gt FIXED MKR DEFINE PEAK PEAK SEARCH RETURN RETURN mkrfetnm FINAL TRIM SIZE 7 5 in x 9 0 in Reference PRESET GUIDED SETUP presetm SCALE REF AUTO SCALE SCALE div REFERENCE POSITION REFERENCE VALUE MARKER gt REFERENCE scalem 5 10 FINAL TRIM SIZE 7 5 in x 9 0 in Reference Keys Softkeys and Connectors Keys Softkeys and Connectors status notation A MENU A OFF AREF FIXED MKR AREF MKR n This section is a dictionary reference of front and rear panel connectors front panel keys and softkeys Keys that begin with a symbol are listed at the front of the section Indicates measurement parameters changed Measured data is in doubt until a complete clean sweep has been taken Activates the delta marker menu This menu is used to designate a reference marker and read the difference in values between it and the active marker Key Path
158. ncrease and then decrease relative to the surrounding responses or noise floors in order to be defined as a peak If peak excursion is defined as 20 dB then the values of a and b shown in the following figure must be at least 20 dB in order to be considered a 3 13 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Using Markers peak Values a and b represent the respective amplitudes of both sides of a maximum response The allowable excursion values range from 0 to 100 dB Peak Not Peak DATA mre DIA KOE VT Tt TAT a HILL a MANIT You can also set the level below which nothing will be considered a peak This is the peak threshold value The maximum amplitude of the response must be at least this value to be called a peak The allowable threshold values range from 100 to 0 dB The default value is 75 dB 3 14 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Using Markers Any part of a peak as defined by peak excursion that is less than the peak threshold value is also used to satisfy the peak excursion criteria For example when the peak excursion is set to 8 dB a peak that is 4 dB above and 4 dB below the peak threshold will be considered a peak Peaks Not Peaks Peak 2 Threshold Level 3 4 all F TC ooo ili i FH m j Li NP u M VEN a n M ILLLELLLTTA e START 0 000 ma 1900 na mi STOP 7 799 um MR VALLES FINAL TRIM SIZE 7 5 in x 9 0 in
159. nds Enables specific bits of event status register Query Syntax ESE lt value gt Item Description value 0 to 32767 1215 1 Enables specific bits of event status register B Syntax ESNB lt value gt Item Description value 0 to 32767 1215 1 Returns the event status register value Syntax ESR Enable disable storage of corrected data when a file is stored to disk Syntax EXTMDATA ON OFF Equivalent softkey SAVE DEFINE INIT PURGE DATA ARRAY on OFF Enable disable storage of formated data when a file is stored to disk Syntax EXTMFORM ON OFF Equivalent softkey SAVE DEFINE INIT PURGE FORMAT ARY on OFF Enable disable storage of user graphics when a file is stored to disk Syntax EXTMGRAP ON OFF Equivalent softkey SAVE DEFINE INIT PURGE GRAPHICS on OFF 4 25 FINAL TRIM SIZE 7 5 in x 9 0 in EXTMRAW EXTT FORM1 FORM2 FORM3 FORM4 FORM5 Programming Instrument Commands Enable disable storage of raw data arrays when a file is stored to disk Syntax EXTMRAW ON OFF Equivalent softkey SavE DEFINE INIT PURGE DATA ARRAY on OFF Enable disable the external measurement trigger mode Syntax EXTT ON OFF Item Description value 1 to 200 default 1 Equivalent softkey MEAS TRIGGER TRIG OFF Sets the format for data transfer to the reflectometer s internal format Syntax FORM1 Sets the f
160. nel connection is not used This rear panel connection is not used Selects external trigger mode In this mode the sweep is held until the instrument receives a TTL low signal at its rear panel EXT TRIGGER connector There is only one sweep per low going transition Key Path MEAS EXT TRIG on OFF 5 22 FINAL TRIM SIZE 7 5 in x 9 0 in EXT TRIGGER connector EXTERNAL FIXED MKR MENU FIXED MKR POSITION Reference Keys Softkeys and Connectors This rear panel connection is used to connect an external negative going TTL compatible signal to trigger a measurement sweep The trigger can be set to external using the EXT TRIG on DEF softkey Turns off the internal sources so that an external source can be used This feature is provided as a convenience for users with very advanced applications Note that normal calibration and correction features are not available with an external source Use the entry keys to enter the wavelength of the external source Connect the external source to the rear panel SOURCE ARM INPUT connector This connector is located behind a cover plate on the lightwave section s rear panel The cover plate is located just left of the I 0 INTERCONNECT cable The green fiber optic cable supplies the internal sources and should normally remain connected to this connector Refer to Block Diagram in this chapter Key Path MENU EXTERNAL Activates the fixed marker menu where the time di
161. nt is calibrated the status indicator C appears on the display s left hand side 2 2 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Contents Running Guided Setups and Calibrations 0 e ea 2 6 To perform a guided setup devices with pigtail 2 7 To perform a guided setup devices without pigtail 2 13 To perform a guided calibration 00 ccc nee 2 18 Performing Manual Calibrations 00 000 0 c nce eee 2 20 To balance the receiver aa aaa 2 23 To calibrate the magnitude 00 cee eens 2 25 To calibrate for an external source 6 6 aaa 2 26 To turn off calibration data 2 0 0 0 0 ccc cee eens 2 28 To enter the standard s reflection percentage ssssssss 2 28 To turn chromatic dispersion correction on and off 2 28 To use the Option 001 cable tray sssssssssssse e 2 29 NOTE In order to ensure a successful calibration clean all fiber optic connectors prior to the calibration Refer to Cleaning Connections for Accurate Measurements in Chapter 1 in this chapter Some hardware is You ll need the following hardware supplied with 8504B to calibrate the required instrument e A set of cables matched length e A low reflection termination You can use any termination that has a return loss that is greater than 30 dB 2 3 FINAL TRIM SIZE 7 5 in x 9 0 in Perform
162. nters and plotters Toggles the HP IB diagnostic feature debug mode This mode is normally used the first time a program is written If a program has already been debugged it is unnecessary When this diagnostic feature is on the precision reflectometer scrolls a history of incoming HP IB commands across the display in the title line Non printable characters are represented as 7 Any time a syntax error is received the commands stop and a pointer indicates the misunderstood character Key Path LOCAL HP IB DIAG on OFF Initializes the diskette If the diskette is damaged the message INITIALIZATION FAILED is displayed During the initialization process the message WAITING FOR DISK is displayed This is normal Key Path SavE STORE TO DISK DEFINE STORE INITIALIZE DISK INIT DISK YES Activates the initialize menu Initialization formats the disk in an external disk drive The format used is LIF If you attempt to store without initializing the disk the message CAUTION DISK MEDIUM NOT INITIALIZED is displayed Key Path SAVE STORE TO DISK DEFINE STORE INITIALIZE DISK Adjusts the screen intensity from 0 off to 100 This intensity adjustment is not affected by PRESET MODIFY COLORS DEFAULT COLORS SAVE COLORS or RECALL COLORS Key Path DISPLAY MORE ADJUST DISPLAY INTENSITY 5 27 FINAL TRIM SIZE 7 5 in x 9 0 in I O INTERCON NECT connector LEFT LOWER LEFT UPPER LIMIT LINE OF
163. off Turns the limit line fail beeper on or off When limit line testing is on a beep is sounded each time a failure is detected The limit fail beeper is independent of the warning beeper and the operation complete beeper Key Path SYSTEM LIMIT MENU BEEP FAIL on OFF 5 15 FINAL TRIM SIZE 7 5 in x 9 0 in BEEP WARN on OFF BRIGHTN ESS C status notation CALIBRATE MAGNITUDE CALIBRATE MENU CENTER CLEAR ALL Reference Keys Softkeys and Connectors Causes a beep sound whenever a cautionary message is displayed Key Path DISPLAY MORE BEEP WARN on OFF Adjusts the brightness of the selected screen color Valid entries range from 0 minimum to 100 Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS DATA LIMIT LN BRIGHTNESS Indicates error correction measurement calibration is on Presents a menu for performing measurement calibrations Manual calibrations are faster than following the guided setup procedure Starts a magnitude calibration Always perform a balance receiver calibration before a magnitude calibration Key Path CAL CALIBRATE MENU CALIBRATE MAGNITUDE Displays a menu for performing manual calibrations Key Path CAL CALIBRATE MENU Sets the center value of the screen s horizontal scale The default setting is 200 mm The time scale equivalent is 700 ps Clears all instrument state registers Key Path SAVE CLEAR REGISTER CLEAR ALL 5 16
164. ogies Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Agilent Technologies from another country Agilent Technologies warrants that its software and firmware designated by Agilent Technologies for use with an instrument will execute its programming instructions when properly installed on that instrument Agilent Technologies does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY xi FINAL TRIM SIZE 7 5 in x 9 0 in FINAL TRIM SIZE 7 5 in
165. om instrument state registers and an external disk drive Recalls any previously saved screen color modifications This key is not visible unless color modifications have been saved Key Path DISPLAY MORE ADJUST DISPLAY RECALL COLORS Recalls the instrument state saved in register 1 2 3 4 or 5 The current instrument state is overwritten Key Path RECALL RECALL REGn This rear panel connection allows direct input to the optical detector The yellow fiber optic cable should normally remain connected to this connector Refer to Block Diagram in this chapter Attach the reference fiber optic cable to this front panel output connector The output at this connector is 1300 nn or 1550 nm at a power level that is less than the value listed in Characteristics in Chapter 6 for the TEST PORT connector Refer to Block Diagram in this chapter Attach the reference fiber optic cable to this front panel input connector The input wavelength is 1300 nm or 1550 nm from the REFERENCE EXTENSION B connector Refer to Block Diagram in this chapter Sets the position of the reference line on the screen The default value is five divisions up the middle of the screen The reference line is normally red and further identified by a small triangle at the left edge of the graticule Key Path SCALE REF REFERENCE POSITION 5 41 FINAL TRIM SIZE 7 5 in x 9 0 in REFERENCE VALU E REFRACTIVE INDEX n RESET
166. ometer immediately and contact your Agilent Technologies Service Center GPIB error number 21 PRINTER not on not connected wrong addrs The printer does not respond to control Verify power to the printer and check the GPIB connection between the reflectometer and the printer Ensure that the printer address recognized by the reflectometer matches the GPIB address set on the printer itself GPIB error number 24 REQUESTED DATA NOT CURRENTLY AVAILABLE The reflectometer does not currently contain the data being requested For example this condition occurs when error term arrays are requested and no calibration is active GPIB error number 30 SOURCE 1 TEMPERATURE LOOP OPEN The temperature loop on the 1300 nm source is open Turn off the reflectometer immediately and contact your Agilent Technologies Service Center GPIB error number 93 SOURCE 2 TEMPERATURE LOOP OPEN The temperature loop on the 1550 nm source is open Turn off the reflectometer immediately and contact your Agilent Technologies Service Center GPIB error number 94 7 9 FINAL TRIM SIZE 7 5 in x 9 0 in Error Messages Message Definitions SYNTAX ERROR An improperly formatted or misspelled command was received over GPIB GPIB error number 33 SYSTEM IS NOT IN REMOTE The reflectometer is in local mode In this mode it will not respond to GPIB commands with front panel key equivalents It will however respond to commands that have no such equi
167. on correction on and off in Chapter 2 to learn how to enable the correction data The measurement range is degraded due to dispersion effects over the 100 mm to 400 mm range Refer to Characteristics in this chapter to see a display of the noise floor Return Loss Measurement Range 1300 nm source 10 to 60 dB 1550 nm source 10 to 80 dB 1 Specification applies after 50 averages and minimum span For 1300 nm the minimum span is 1 mm For 1550 nm the minimum span is 1 2 mm Dispersion correction must be enabled when using the 1550 nm source 2 Specification applies over the mirror position range from O to 100 mm 6 5 FINAL TRIM SIZE 7 5 in x 9 0 in Description Specification Specifications and Regulatory Information Specifications Return Loss Uncertainty Return loss uncertainty gives the possible range of true return loss values given a specific measured value For example if the measured return loss was 57 dB and the uncertainty was 1 8 dB and 1 7 dB the true return loss value would lie somewhere between 55 2 dB 57 1 8 and 58 7 dB 57 1 7 There are five factors which contribute to the return loss uncertainty Dynamic accuracy Sweep to sweep repeatability Polarization sensitivity Amplitude flatness versus mirror position Dispersion 1550 nm only Dynamic accuracy dominates the uncertainty near the noise floor and becomes increasingly less significant at high
168. on the screen Then press DONE Wait for one full sweep to complete Press and then AVERAGING ON e Wait for the instrument to average 16 sweeps On the left side of the graticule the Avg number will count to 16 Press and then GUIDED SETUP and follow the prompts on the screen Press CONNECT TERMINATION Disconnect the device from the TEST PORT C onnect the low reflection termination directly to the TEST PORT Low Reflection Termination Press BALANCE RECEIVER 2 9 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations Balance Receiver 16 Adjust the two polarization balance knobs until the line is in the shaded area AS Adjust vector line to be within shaded greg shown 17 Press DONE NOTE After balancing the receiver do not move the extension cable or the balance knobs Movement degrades measurement accuracy 2 10 FINAL TRIM SIZE 7 5 in x 9 0 in Calibrate Magnitude Connect Device Under Test 18 19 20 21 22 23 24 25 Performing Guided Setups and Calibrations Running Guided Setups and Calibrations Disconnect the termination from the TEST PORT Connect a second cable that is the same length as the REFERENCE EXTENSION cable to the TEST PORT The free end of this cable serves as the Fresnel cal standard When using the supplied cables the free end of the cable functi
169. ons as the calibration standard This is possible because the percentage of light reflected by that type of cable connector is known For 1300 nm measurements the correct value is 15 dB 3 16 For 1550 nm the correct value is 14 7 dB 3 37 Other calibration standards cables connectors or devices may have other reflection values If you are using cables from the Option 001 accessory kit press FRESNEL If you are using another standard perform the following steps a Obtain the standard s reflection return loss in dB b Enter this value using the USER STD softkey Press MEASURE STANDARD and wait for the standard to be measured Disconnect the cable from the TEST PORT Connect the device to be tested to the TEST PORT Press MEASURE DEVICE and then EXIT SETUP to complete the guided setup and begin device measurements log MAG 10 dB REF 58 dB START mm 1300 nm n l STOP 400 mm As you measure devices observe the following suggestions FINAL TRIM SIZE 7 5 in x 9 0 in Performing Guided Setups and Calibrations Running Guided Setups and Calibrations e Use the START and STOP CENTER and SPAN and marker keys to optimize the displayed response Reducing the span increases measurement speed improve resolution and increase dynamic range e To improve the signal to noise ratio use averaging Turn on averaging by
170. ormat for data transfer to the IEEE 32 bit floating point Syntax FORM2 Sets the format for data transfer to the IEEE 64 bit floating point Syntax FORM3 Sets the format for data transfer to ASCII Syntax FORM4 Sets the format for data transfer to the IEEE 32 bit floating point but with least significant byte of each point sent first for compatibility with PC DOS memory management Syntax FORMS 4 26 FINAL TRIM SIZE 7 5 in x 9 0 in FULP FULS GUIC GUIS GROI HOLD Programming Instrument Commands Selects the full page plot Syntax FULP Equivalent softkey COPY FULL PAGE Specifies full span distance or time sweep minimum to maximum Syntax FULS Equivalent softkey MENU FULL SPAN Initiates guided calibration Receiver balance is performed first and is followed by magnitude calibration Syntax GUIC Equivalent softkey CAL GUIDED CAL Initiates guided setup a series of screens with prompts to set up and calibrate the reflectometer Syntax GUIS Sets value of n group index of refraction of the medium under test Rescales horizontal axis when distance format is selected This command is equivalent to the INDEREFR command Syntax GROI lt value gt Sets the trigger mode to hold the current measurement Syntax HOLD Equivalent softkey MEAS TRIGGER HOLD 4 27 FINAL TRIM SIZE 7 5 in x 9 0 in INDEREFR IDN INID INPUDATA INPUFORM Programming Instrum
171. ot within the values shown below thoroughly clean all connectors on the cables and front panel and repeat this procedure from step 1 Peak value 1300 nm source 00 0 15 dB 0 5 dB Peak value 1550 nm source 00 0002 ee 14 7 dB 0 5 dB FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 5 Verify Operation log MAG 18 dB REF 5B dB il 15 834 dB hp 34 T mm V C MARKER 1 34 78 mm 15 834 dB KAPA RR a CENTER 35 mm 13880 nm n l SPAN ZU mm Marker showing peak value with 1300 nm source 17 Connect a coupling adapter to the end of the TEST PORT fiber optic cable FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 5 Verify Operation Super PC Optic Cable Coupling any length Adapter kent3s 18 Partially insert the connector of another cable into the adapter Observe the Fresnel reflection of this connector as you insert the cable 19 Repeatedly press MKR ZOOM as you slowly insert the connector into the adapter until the span is 1 mm The Fresnel response should be as close to the original response as possible and can still be resolved See the following figure FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 5 Verify Operation log MAG 18 dB REF 5B dB l 27 591 dB hp 24 67 mm c HI d I1 n f CENTER
172. pecifications Regulatory Information Spurious Responses Internal reflections within the instrument can cause spurious signals to be displayed along with the true signals The level of the spurious signals depends on the magnitude of the reflections from the device being tested For example if a 15 dB reflection signal was measured using the 1550 nm source all possible spurious signals would be lower than 77 dB return loss 15 dB 62 dB in a range of 20 mm from the location of the 15 dB reflection Spurious Responses Offset 20to 10mm 10to 0 5mm 0 5to10mm 10to20mm 1300 nm source 1550 nm source 55 dB 45 dB 69 dB 69 dB 62 dB 62 dB 62 dB 62 dB 1 Indicates responses below la 2 Offset of spurious response rgest reflection Specification applies with averaging on in minimum span rom displayed reflection FINAL TRIM SIZE 7 5 in x 9 0 in Specifications and Regulatory Information Specifications Operating Specifications Use indoor Operating temperature 0 C to 40 C on operating storage temperature 40 C to 70 C Altitude up to 15 000 feet 4 572 meters Humidity 5 to 95 non condensing aximum relative humidity 80 for temperatures up to 31 C decreasing linearly to 50 relative umidity at 40 C Display Processor section Power requirements 50 60 Hz ran
173. perfections Inspect the fiber for cracks and chips Visible imperfections not touching the fiber core may not affect performance unless the imperfections keep the fibers from contacting 1 22 FINAL TRIM SIZE 7 5 in x 9 0 in CAUTION CAUTION Installing Cleaning Connections for Accurate Measurements To clean a non lensed connector Do not use any type of foam swab to clean optical fiber ends Foam swabs can leave filmy deposits on fiber ends that can degrade performance 1 Apply isopropyl alcohol to a clean lint free cotton swab or lens paper Cotton swabs can be used as long as no cotton fibers remain on the fiber end after cleaning 2 Before cleaning the fiber end clean the ferrules and other parts of the connector 3 Apply isopropyl alcohol to a new clean lint free cotton swab or lens paper 4 Clean the fiber end with the swab or lens paper Move the swab or lens paper back and forth across the fiber end several times Some amount of wiping or mild scrubbing of the fiber end can help remove particles when application of alcohol alone will not remove them This technique can remove or displace particles smaller than one micron 5 Immediately dry the fiber end with a clean dry lint free cotton swab or lens paper 6 Blow across the connector end face from a distance of 6 to 8 inches using filtered dry compressed air Aim the compressed gas at a shallow angle to the fiber end face
174. play to factor default values To turn on the warning beep 1 Press DISPLAY 2 Press MORE and then BEEP WARN on OFF so that ON is highlighted 3 45 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Changing Colors and Audible Warnings To turn off the done beep 1 Press DISPLAY 2 Press MORE and then BEEP DONE ON off so that OFF is highlighted 3 46 FINAL TRIM SIZE 7 5 in x 9 0 in Printing and Plotting In this section you ll learn how to create prints or plots of the following information for reports or records e Hard copies of the display e Tables of measured stimulus points e Tables of instrument parameters Plots can be made on any Hewlett Packard HP GL plotter Prints can be made on any Hewlett Packard graphics printer If the printer or plotter does not have a GPIB connector you will need to use a GPIB to Centronics interface converter The following printers support the Hewlett Packard PCL printer language e ThinkJet e PaintJet e LaserJet For more information on printing and plotting refer to the softkey definitions in Chapter 5 3 47 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurements Printing and Plotting To print the display 1 Connect the printer to the precision reflectometer using an HP IB cable 2 Enter the printer s address and type as described in To enter the printer plotter type and address in this section 3 Press
175. pressing AVG and then AVERAGING on OFF so that ON is highlighted 2 12 FINAL TRIM SIZE 7 5 in x 9 0 in Select cables Check setup Performing Guided Setups and Calibrations Running Guided Setups and Calibrations To perform a guided setup devices without pigtail Press PRESET and then GUIDED SETUP Press a softkey to select the wavelength Press CLASSIFY DEVICE and then NO PIGTAIL Press CONNECT CABLES Locate two fiber optic cables that are of equal length Connect one of the cables between front panel REFERENCE EXTENSION connectors A and B If you have an Option 001 accessory kit you can stabilize the cable with the cable tray Coil the cable around as necessary If you are using more than one cable place the mid connectors in the wide part of the slot Let the ends of the cable protrude from the tray Be sure to place the cover on the tray Connect the second fiber optic cable to the front panel TEST PORT Connect your device to the TEST PORT cable Press CHECK SETUP and wait for one full measurement sweep to complete DATA lag MAG 10 dB REF 58 dB TART 8 mm 1300 nm n l STOP 400 mm 2 13 FINAL TRIM SIZE 7 5 in x 9 0 in Connect termination Balance Receiver Performing Guided Setups and Calibrations 10 11 12 13 14 15 ing Guided Setups and Calibrations If a r
176. r with any data specified in the define store menu Key Path SAVE STORE TO DISK STORE FILEn 5 46 FINAL TRIM SIZE 7 5 in x 9 0 in STORE TO DISK SYSTEM SYSTEM CONTROLLER TALKER LISTENER Reference Keys Softkeys and Connectors Leads to the store file menu which introduces a series of menus for external disk storage Key Path SAVE STORE TO DISK This key presents a menu for guided setups limit lines and displaying the firmware revision Select this HP IB mode when peripheral devices are to be used and there is no external controller As the system controller the 8504B can directly control peripherals plotter printer or disk drive System controller mode must be set in order for the 8504B to access peripherals from the front panel to plot print or store on disk If there is no other controller on the bus this mode is selected automatically The system controller mode can be used without knowledge of HP IB programming However the HP IB addresses displayed in the address menu must match the addresses set in the peripheral instruments This mode can also be selected manually from the front panel and again can be used only if no active computer controller is connected to the system through HP IB If you try to set system controller mode when another controller is present the message CAUTION CAN T CHANGE ANOTHER CONTROLLER ON BUS is displayed Do not try to use this mode for programming K
177. r mode is the normal mode of operation In this mode a computer controller communicates with the precision reflectometer and other instruments over the bus The computer sends commands or instructions to and receives data from the precision reflectometer All of the capabilities available from the precision reflectometer s front panel can be used in this remote operation mode except for control of the power line switch and the reference polarization balance knobs In system controller mode the reflectometer itself can use HP IB to control compatible peripherals without the use of an external computer It can output measurement results directly to a compatible printer or plotter and store instrument states using a compatible disk drive In pass control mode the controller can pass control of the bus to the precision reflectometer on request from the precision reflectometer The precision reflectometer is then the controller of the peripherals and can direct them to plot print or store without going through the computer When the peripheral operation is complete control is passed back to the computer Only one controller can be active at one time The computer remains the system controller and can regain control at any time Set the HP IB address In HP IB communications each instrument on the bus is identified by an from the front panel HP IB address This decimal based address code must be different for each instrument on the bus Most of t
178. r shutter cap 08145 64521 FC PC dust cap 08154 44102 DIN dust cap 5040 9364 HMS10 dust cap 08145 44101 ST dust cap 1401 0291 Consistent measurements with your lightwave equipment are a good indication that you have good connections However you may wish to know the insertion loss and or return loss of your lightwave cables or accessories If you test your cables and accessories for insertion loss and return loss upon receipt and retain the measured data for comparison you will be able to tell in the future if any degradation has occurred Connector or insertion loss is one important performance characteristic of a lightwave connector Typical values are less than 1 dB of loss and sometimes as little as 0 1 dB of loss with high performance connectors Return loss is another important factor It is a measure of reflection the less reflection the better the larger the return loss the smaller the reflection The best physically contacting connectors have return losses better than 50 dB although 30 to 40 dB is more common De You can visually inspect your cables Although it is not necessary visual inspection of fiber ends can be helpful Contamination or imperfections on the cable end face can be detected as well as cracks or chips in the fiber itself Use a microscope 100X to 200X magnification to inspect the entire end face for contamination raised metal or dents in the metal as well as any other im
179. reference extension cable connected between REFERENCE EXTENSION A and B on the front during or after a calibration Moving this cable changes the polarization and voids the calibration If you have an Option 001 accessory kit use the kit s cable tray to help keep the reference extension cable stationary Unlike the reference extension cable the test port cable is unaffected by changes in polarization due to cable bending Therefore this cable may be moved without degrading the calibration Keep the balance knobs stationary Do not move either of the front panel reference polarization balance knobs after calibration Moving the knobs compromises the calibration 2 5 FINAL TRIM SIZE 7 5 in x 9 0 in Running Guided Setups and Calibrations This section shows you how to perform guided setups for pigtailed or nonpigtailed devices A pigtail is a length of fiber optic cable which usually terminates in a connector Guided setups can be started using either the PRESET or SYSTEM keys Using the PRESET key has the advantage of setting the instrument to a known state During a guided calibration a polar vector display shows polarization balance between two receivers in the instrument After manually adjusting the polarization balance using the front panel knobs the precision reflectometer mathematically compensates for any polarization imbalance between the TEST PORT cable and the REFERENCE EXTENSION paths To
180. rogramming Keys versus Commands Keys versus Commands continued Key Equivalent Programming Command EMORY DISPMEMO EMORY 1 EMO EMORY 1 COLOMEMT EMORY 2 EMO2 EMORY2 REF LINE COLOMEM2 DDLE L KR 700 ARKZOOM EXT PAGE EXP EXT PEAK HIGHER ARKPHIG EXT PEAK LEFT ARKPLEF EXT PEAK LOWER ARKPLOW EXT PEAK RIGHT ARKPRIG OPERATING PARAMETERS OPEP PEAK EXCURSION PEAKEXCU PEAK THRESHOLD PEAKTHRE PEAK TRACK on OFF ARKPTRA PEN NUM DATA PENNDAT PEN NUM GRATICULE PENNGRAT DFLT PEN NUM MARKER PENNMARK PEN NUM MEMORY PENNMEMO PEN NUM TEXT PENNTEXT PLOT PLOT PLOT DATA ON of PDATA PLOT GRAT ON off PGRAT PLOT MEM ON off PME PLOT MKR ON o PMKR PLOT SPEED FAST PLOSFAST PLOT SPEED SLOW PLOSSLOW PLOT TEXT ON off PTEXT POSITION LIMP POSITION OFFSET LIMIPOSO PRESET PRES RST 4 57 FINAL TRIM SIZE 7 5 in x 9 0 in Programming Keys versus Commands Keys versus Commands continued Key Equivalent Programming Command PREV PAGE PREP PRINT PRINALL PRINT STANDARD PRIS PURGE FILET to FILES PURG RAW ARRAY on OFF EX
181. rotective cap on the free end of the fiber optic cable remove it 3 Attach the other 75 cm cable between the front panel REFERENCE EXTENSION connectors A and B 4 Press PRESET 5 Press and then GUIDED CAL 6 Follow the instructions on the display to calibrate the instrument You do not need to put a device on the test port cable after completing the calibration log MAG 14 dB REF 58 dB Lal START mm 1399 nm n l STOP 488 mm Fresnel response T Press MKR FCTN MAX SEARCH and then MKR ZOOM The response should be centered with the measurement span at 20 mm 3 26 FINAL TRIM SIZE 7 5 in x 9 0 in Draw the limit line segments 10 11 12 13 14 Performing Measurements Creating Limit Lines Press SYSTEM Press LIMIT MENU and then LIMIT LINE ON This makes the limit lines visible Don t worry if the position of the signal on your screen doesn t exactly match the figures in this tutorial At the end of the tutorial you can simply increase the measurement span and move the limit lines Press EDIT LIMIT LINE Press ADD to enter a limit segment and turn on a marker The reflectometer enters a default segment for you This segment is positioned horizontally at 400 mm has upper and lower vertical limits of 0 dB and is a sloping line SL It is not visible now Press POSITION VALUE and enter 33 mm
182. rst put the file name into the position 1 5 desired then LOAD 1 5 Syntax LOAD 11213145 Equivalent softkey RECALL LOAD FROM DISK Displays in log magnitude format Syntax LOGM Equivalent softkey FORMAT LOG MAG 4 34 FINAL TRIM SIZE 7 5 in x 9 0 in LRN MARK MARKBUCK MARKCENT MARKFIXM Programming Instrument Commands Input a learn string previously obtained by the OUTPLEAS command This command is equivalent to the INPULEAS command Syntax LRN lt value gt Selects the active marker and moves it to the specified position value Syntax MARK 1 2 3 4 lt value gt suffix Item Description value Domain dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey MKR MARKER 1 to MARKER 4 Moves the active marker to specified data point number Syntax MARKBUCK1 lt value gt Item Description value 0 to 400 Changes the stimulus center value to the active marker value Syntax MARKCENT Equivalent softkey MKR FCTN MARKER CENTER Puts a fixed reference marker at the present active marker position and makes the fixed marker stimulus and response values at that position equal to zero This command is identical to the MARKZERO command Syntax MARKFIXM Equivalent softkey MKR or MKR FCTN MARKER FIXED MKR 4 35 FINAL TRIM SIZE 7 5 in x 9 0 in MARKFPOS MARKFVAL MARKMA XI MARKMIDD Programming Instrumen
183. ruments are locked together by very gently lifting Up on the front of the display processor If the display processor separates from the lightwave section they are not locked together properly 6 Tighten the rear panel thumbscrews on the locking feet REAR PANEL OF TOP REAR DISPLAY PROCESSOR LOCK FOOT REAR PANEL OF LIGHTWAVE SECTION BOTTOM REAR LOCK FOOT THUMB SCREW TIGHTEN TO LOCK 7 Ensure that there is a minimum of seven centimeters three inches free space around the instrument to provide for adequate cooling 1 6 FINAL TRIM SIZE 7 5 in x 9 0 in Step 3 Set the line voltage Severe damage to the instrument can result if line voltage settings are CAUTION incorrect when power is applied Display Processor Voltage Selector Switches Lightwave Section kentis 1 Determine the line voltage of the AC power source The line power cords should not be connected to the precision reflectometer at this time 2 Use a small flat blade screwdriver to set the display processor s line voltage selector switch to the value determined in step 1 3 Use a small flat blade screwdriver to open the display processor s pull out fuse drawer See the following figure 1 7 FINAL TRIM SIZE 7 5 in x 9 0 in Installing Step 3 Set the line voltage fusedr 4 Verify that the value of the line voltage fuse in the pull out drawer is correct The recommended fuse for both
184. s access by the factory to special service functions It is not accessible to normal users Key Path SYSTEM SERVICE MENU Specify a non color printer Key Path PRINT STANDARD Removes file 1 2 3 4 or 5 from the disk If no file of that name is on the disk the message CAUTION NO FILE S FOUND ON DISK appears Key Path SAVE STORE TO DISK DEFINE STORE PURGE FILES PURGE FILEn Activates the purge files menu which is used to remove the information stored on an external disk Key Path SavE STORE TO DISK DEFINE STORE PURGE FILES Specifies whether or not to store the raw data averaged on disk with the instrument state Key Path SavE STORE TO DISK DEFINE STORE RAW ARRAY on OFF Searches the disk directory for file names recognized as belonging to an instrument state No more than five titles are displayed at one time If there are more than five repeatedly pressing this key causes the next five to be displayed If there are fewer than five the remaining softkey labels are blanked Key Path RECALL LOAD FROM DISK READ FILE TITLES 5 40 FINAL TRIM SIZE 7 5 in x 9 0 in RECALL RECALL COLORS RECALL REGn RECEIVER ARM OUTPUT connector REFERENCE EXTENSION A connector REFERENCE EXTENSION B connector REFERENCE POSITION Reference Keys Softkeys and Connectors Key Path SAVE STORE TO DISK DEFINE STORE PURGE FILES READ FILE TITLES This menu lets you recall data fr
185. s inactive marker data to be shown in the upper right hand corner of the display below the active marker data The data consists of amplitude and distance or time information The inactive marker or markers must be selected previously in order for their data to be displayed When turned off all inactive marker data is removed from the display leaving only the active marker data Key Path MKR MKR VALUES ON off 5 34 FINAL TRIM SIZE 7 5 in x 9 0 in MKR ZOOM MODIFY COLORS NEXT PEAK HIGHER NEXT PEAK LEFT NEXT PEAK LOWER NEXT PEAK RIGHT OP PARMS MKRS etc Reference Keys Softkeys and Connectors Moves the active marker to the nearest peak centers it on the display and decreases the span around the peak This function makes it easy to view the details of a peak response and see any nearby responses Each time the MKR ZOOM is pressed the span is decreased in a 5 2 1 sequence For example if the current span is 0 mm to 400 mm repeatedly pressing this softkey decreases the span to 50 20 10 5 2 and 1 mm 1 2 mm for the 1550 nm band The span value is shown on the bottom right hand edge of the screen If there is no active marker marker 1 is activated and seeks the nearest peak from the far right hand edge of the trace Key Path MKR FCTN MKR ZOOM Presents a menu to modify the colors of the individual screen elements Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS Finds the small
186. scale to display the sweep in terms of time The default and maximum value is 1334 ps minimum is 0 ps These values are not affected by the value of the refractive index 7 Key Path FORMAT TIME Ranges from 0 to 100 and varies the selected element from red to orange yellow green blue violet and back to red If varying tint has no visible effect increase the color percentage first Key Path DISPLAY MORE ADJUST DISPLAY MODIFY COLORS DATA LIMIT LN TINT Presents the title menu for entering a title on the screen Key Path DISPLAY TITLE Selects file 1 2 3 4 or 5 to be retitled and activates the title menu Key Path SAVE STORE TO DISK TITLE FILES TITLE FILEn 5 48 FINAL TRIM SIZE 7 5 in x 9 0 in TITLE FILES TITLE REGn TITLE REGISTER TRIGGER HOLD UPPER LIMIT Reference Keys Softkeys and Connectors Leads to the title file menu where the default file titles can be modified Key Path SAVE STORE TO DISK TITLE FILES Selects an internal register to be retitled and presents the title menu and the character set Key Path GAVE TITLE REGISTER TITLE REGn Leads to the title register menu where the default register titles can be modified Key Path GAVE TITLE REGISTER Stops the measurement sweep The sweep is indicated by a red dot moving left to right below the graticule During retrace red dot moving right to left the mirror returns to its start position and th
187. stance and amplitude values for a fixed reference marker can be set The marker can be positioned anywhere on the display and need not be on the trace It can be set to the current active marker position using the MARKER FIXED MARKER softkey Other markers can then be activated and their values referenced to the fixed marker When this is done the marker readings in the top right corner of the graticule are the distance or time and amplitude values of the active marker minus the fixed marker Also displayed in the top right corner is the notation A REF FIXED Key Path MKR A MENU FIXED MKR MENU Allows you to set a marker at any horizontal position distance or time Separate values are not maintained for logarithmic magnitude format and linear magnitude format Key Path MKR A MENU FIXED MKR MENU FIXED MKR POSITION 9 23 FINAL TRIM SIZE 7 5 in x 9 0 in FIXED MKR VALU E FIRMWARE RE VISION FLAT LINE FORMAT FORMAT ARY on OFF FORMAT BINARY Reference Keys Softkeys and Connectors Allows you to set the fixed marker at any vertical value amplitude Separate values are not maintained for logarithmic magnitude format and linear magnitude format Key Path MKR A MENU FIXED MKR MENU FIXED MKR VALUE Pressing this softkey displays the version number of the instrument s internal firmware Key Path FIRMWARE REVISION Defines a flat limit line segment whose value is constant with dist
188. standards 2 20 turning off 2 28 5 18 CALIBRATION REQUIRED error message 5 18 CAL key 5 16 menu map 5 3 CALM command 4 19 CALUSER command 4 19 CAUTION error message CALIBRATION REQUIRED 5 18 CAUTION messages DDRESSED TO TALK WITH NOTHING TO SAY 7 3 LOW RESTRICTED CHECK FAN FILTER 7 3 NOTHER SYSTEM CONTROLLER ON HP IB 7 3 SCII MISSING 7 3 LOCK INPUT ERROR 7 4 K INPUT LENGTH ERROR 7 4 HANGE HP IB to SYST CTRL or PASS CTRL 7 4 ECTION CONSTANTS NOT STORED 7 4 K HARDWARE PROBLEM 7 4 K IS WRITE PROTECTED 7 4 K MEDIUM NOT INITIALIZED 7 5 K MESSAGE LENGTH ERROR 7 5 K not on not connected wrong addrs 7 5 K WEAR REPLACE DISK SOON 7 5 ST CHARACTER MUST BE A LETTER 7 5 NCTION NOT VALID 7 5 LLEGAL UNIT OR VOLUME NUMBER 7 5 NITIALIZATION FAILED 7 6 NPUT ATTEMPTED WITHOUT SELECTING INPUT TYPE 7 6 NSTRUMENT STATE MEMORY CLEARED 7 6 gt gt a E Q Q zuuuututu JEEBEEEBESOGUHEXZZ U ow G Index 4 FINAL TRIM SIZE 7 5 in x 9 0 in NSUFFICIENT MEMORY 7 6 NVALID KEY 7 6 MOTOR COMMAND ERROR 7 6 MOTOR RESET FAILED 7 6 MOTOR STOPPED EXCESSIVE POSITION ERROR 7 6 MOTOR STOPPED NEGATIVE LIMIT 7 7 MOTOR STOPPED POSITIVE LIMIT 7 7 MOTOR TRAJECTORY ERROR 7 7 O DISK MEDIUM IN DRIVE 7 7 O FILE S FOUND ON DISK 7 7 O MARKER DELTA SPAN NOT SET 7 7 O SIGNAL CHECK BNC CABLE ON REAR PANEL 7 7 O SOURCE FOUND CHECK POWER TO TEST SET 7
189. system controller s interface in order for USEPASC to function properly The default value 21 is set for the HP 9000 series 200 300 computers This should be set to 30 when using the HP 82335A Interface Card This command is identical to the ADDRCONT command Syntax PCB lt value gt Item Description value lo to 30 default 21 Equivalent softkey LOCAL ADDRESS CONTROLLER 4 42 FINAL TRIM SIZE 7 5 in x 9 0 in P PEAKEXCU PEAKTHRE PENN Programming Instrument Commands Selects whether data memory the graticule markers and or text is to be plotted when using the PLOT command Syntax P DATA MEM GRAT MKR TEXT ON OFF 7 Equivalent softkey COPY DEFINE PLOT Sets the excursion value used to define a peak for the peak search functions Syntax PEAKEXCU lt value gt Item Description value lo to 100 default 6 Equivalent softkey MKR FCTN PEAK EXCURSION Sets the threshold value that a data point must be above to be defined as a peak during a peak search Syntax PEAKTHRE lt value gt Item Description value 100 to 0 default 70 Equivalent softkey MKR FCNT PEAK THRESHOLD Selects the pen number for data memory the graticule markers or text when using the PLOT command Syntax PENN DATA MEMO GCRAT MARK TEXT lt value gt Item Description value lo to 10 Equivalent softkey COPY DEFINE PLO
190. t Commands Sets the fixed marker position value offset Syntax MARKFPOS lt value gt suffix Item Description value Domain dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey WKR FIXED MKR POSITION Sets the fixed marker position value offset Syntax MARKFVAL lt value gt suffix Item Description value Format dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey MKR FIXED MKR VALUE Moves the active marker to the maximum point on the trace This command is identical to the MAXS command Syntax MARKMAXI Equivalent softkey MKR FCTN MAX SEARCH Sets the middle value for the delta limit using the active marker value Syntax MARKMIDD Equivalent softkey SYSTEM MIDDLE VALUE 4 36 FINAL TRIM SIZE 7 5 in x 9 0 in MARKOFF MARKP MARKPOSI MARKPTRA MARKREF Programming Instrument Commands Turns off all the markers and the delta reference marker Syntax MARKOFF Equivalent softkey MKR ALL MKR OFF Places the active marker on the next peak higher left lower or right of its current position Syntax MARKP HIG LEF LOW RIG Equivalent softkey MKR FCTN NEXT PEAK HIGHER NEXT PEAK LEFT NEXT PEAK LOWER and NEXT PEAK RIGHT While editing a limit segment sets the position value to the active marker value Syntax MARKPOSI Equivalent softkey SYSTEM MARKER gt POSITION Places the active
191. t panel adapter make sure that the fiber end does not touch the outside of the mating connector or adapter Because of the small size of cores used in optical fibers care must be used to ensure good connections Poor connections result from core misalignment air gaps damaged fiber ends contamination and improper use and removal of index matching compounds Use dry connections Dry connectors are easier to clean and to keep clean Dry connections can be used with physically contacting connectors for example Diamond HMS 10 HP FC PC DIN and ST If a dry connection has 40 dB return loss or better making a wet connection will probably not improve and can degrade performance Agilent Technologies strongly recommends that index matching compounds NOT be applied to their instruments and accessories Some compounds such as gels may be difficult to remove and can contain damaging particulates If you think the use of such compounds is necessary refer to the compound manufacturer for information on application and cleaning procedures Cleaning Accessories Item Part Number Isopropyl alcohol 8500 5344 Cotton swabs 8520 0023 Small foam swabs 9300 1223 Compressed dust remover non residue 8500 5262 1 21 FINAL TRIM SIZE 7 5 in x 9 0 in Inspecting Fiber Optic Cables Installing Cleaning Connections for Accurate Measurements Dust Caps Provided with Lightwave Instruments Item Part Number Lase
192. the current instrument state of the reflectometer Syntax OUTPLEAS Outputs the limit test results only for the failed points Data format position result 0 for fail 1 for no test upper limit lower limit Form 4 Syntax OUTPLIMF Outputs the limit test results for each point Data format position result 1 for pass 0 for fail 1 for no test upper limit lower limit This is always a Form 4 ASCII transfer regardless of the FORM command already set Syntax OUTPLIML Outputs the limit test result for the maker position Data format position result 1 for pass 0 for fall 1 for no test upper limit lower limit Syntax OUTPLIMM 4 41 FINAL TRIM SIZE 7 5 in x 9 0 in OUTPMARK OUTPMEMO OUTPPLOT OUTPPRIN OUTPRAWI OUTPTITL PCB Programming Instrument Commands Outputs the active marker values Data format marker value 0 position Syntax OUTPMARK Outputs the memory data Data format data 0 Syntax OUTPMEMO Outputs the plot string May be directed to a plotter or read into the computer Syntax OUTPPLOT Outputs the print string May be directed to a printer or read into the computer Syntax OUTPPRIN Output the uncorrected data array Data format datal data2 Syntax OUTPRAW1 Outputs the display title less than 54 characters Syntax OUTPTITL Sets the HP IB address which the reflectometer uses to communicate with an external controller This address must match that set on the
193. the pen number for plotting the graticule The default is pen number 3 Key Path COPY CONFIGURE PLOT PEN NUM GRATICULE Selects the pen number for plotting both the markers and the marker values The default is pen number 5 Key Path COPY CONFIGURE PLOT PEN NUM MARKER Selects the number of the pen to plot the memory trace The default is pen number 1 Key Path COPY CONFIGURE PLOT PEN NUM MEMORY Selects the pen number for plotting the text The default is pen number 1 Key Path COPY CONFIGURE PLOT PEN NUM TEXT Plots the display to a compatible graphics plotter using the currently defined plot parameters or default parameters Any or all displayed information can be plotted except a limit table or the softkey labels Tabular listings can be plotted although plotting is considerably slower than printing Key Path COPY PLOT Specifies whether the data trace is to be drawn or not drawn on the plot Key Path COPY DEFINE PLOT PLOT DATA ON off 5 37 FINAL TRIM SIZE 7 5 in x 9 0 in PLOT GRAT ON off PLOT MEM ON off PLOT MKR ON off PLOT SPEED PLOT TEXT ON off POSITION OFFSET Reference Keys Softkeys and Connectors Specifies whether the graticule and the reference line are to be drawn or not drawn on the plot Key Path COPY DEFINE PLOT PLOT GRAT ON off Specifies whether the memory trace is to be drawn or not drawn on the plot Memory can only be plotted if it is displ
194. this chapter Turns off the internal light sources Key Path MENU SOURCE OFF 5 45 FINAL TRIM SIZE 7 5 in x 9 0 in SPACE Gran CRT Tor STORE FILEn Reference Keys Softkeys and Connectors Adds a space to the title Do not use this softkey in defining a register title Key Path DISPLAY TITLE SPACE Key Path GAVE TITLE REGISTER TITLE REGn SPACE Key Path SAVE STORE TO DISK TITLE FILES TITLE FILEn SPACE Sets the horizontal measurement range The default setting is 400 mm which has a time scale equivalent of about 1334 ps When the refractive index is one the following minimum spans are available minimum value for 1300 nm 0 ccc cece eee 1 mm minimum value for 1550 nm a aaa kaaa kaaa aaa kaaa 1 2 mm The maximum measurement span is dependent on the refractive index of the light path as shown in the equation 400 mm n magimum span where n is the index of refraction Sets the start value of the horizontal measurement range The default setting is 0 mm and the minimum setting is 0 mum or 0 ps Sets the stop value of the horizontal measurement range The maximum setting is dependent on the refractive index of the light path as shown in the equation 400 mm n mazimum span where 7 is the index of refraction The maximum time setting is 1334 ps It is not affected by n Stores the current instrument state in external file 1 2 3 4 or 5 togethe
195. tion value Format dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey SYSTEM MIDDLE VALUE Sets the starting position value of a limit testing segment Syntax LIMP lt value gt suffix Item Description value Domain dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey SYSTEM POSITION VALUE Specifics the limit type as a flat line sloping line or single point segment Syntax LIMT FL SL SP Equivalent softkey SYSTEM LIMIT TYPE Sets the upper limit value for a limit testing segment Syntax LIMU lt value gt suffix Item Description value Format dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey SYSTEM UPPER LIMIT 4 33 FINAL TRIM SIZE 7 5 in x 9 0 in LINM LINT LISV LOAD LOGM Programming Instrument Commands Displays the linear magnitude format Syntax LINM Equivalent softkey FORMAT LIN MAG Selects the line type of a trace for plotting Syntax LINT DATA MEMO lt value gt Item Description value lo to 10 Equivalent softkey COPY LINE TYPE DATA or LINE TYPE MEMORY Displays a tabular listing of all the position values and their current measured values Syntax LISV Equivalent softkey COPY LIST VALUES Load the file associated with position 1 5 from disk Requires pass control To load a file by title use the TITF 1 5 to fi
196. trademark of the European Community If accompanied by a year it is when the design was proven ISMT A This is a symbol of an Industrial Scientific and Medical Group 1 Class A product CSA The CSA mark is a registered trademark of the Canadian Standards Association ix FINAL TRIM SIZE 7 5 in x 9 0 in Certification and Assistance Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology NIST to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products For any assistance contact your nearest Agilent Technologies Sales and Service Office FINAL TRIM SIZE 7 5 in x 9 0 in Warranty This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Agilent Technologies will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by Agilent Technol
197. urate and repeatable calibration standard Key Path CAL CALIBRATE MENU CALIBRATE MAGNITUDE FRESNEL 15 dB Selects the percentage of reflectance from the open end of super PC cable as the reflection standard when the source is 1550 nm For every reference extension cable supplied with the 8504B there is a corresponding cable of equal length which may be used as a calibration standard The return loss of the fiber end is 14 7 dB or 3 37 reflection at 1550 nm 10 Log 0 0337 14 7 dB A clean cable end is an accurate and repeatable calibration standard Key Path CAL CALIBRATE MENU CALIBRATE MAGNITUDE FRESNEL 14 7 dB Draws a full size plot according to the scale defined with SCALE PLOT in the DEFINE PLOT menu Key Path COPY SELECT QUADRANT FULL PAGE Sets the source to sweep its full span The default span is 0 to 400 mm 0 to 1334 ps in time format when the refraction index n equals 1 Key Path MENU FULL SPAN 5 25 FINAL TRIM SIZE 7 5 in x 9 0 in GRAPHICS on OFF GRATICULE TEXT GUIDED CAL GUIDED SETUP Hld status notation HORIZ DISTANCE Reference Keys Softkeys and Connectors Specifies whether or not to store display graphics on disk with an instrument state Key Path SAVE STORE TO DISK DEFINE STORE GRAPHICS on OFF Presents softkeys for changing the tint brightness and color of the graticule and active function Key Path DISPLAY MORE ADJ
198. valents such as status requests GPIB error number 52 test cannot execute when source is off An attempt is being made to run the receiver gain adjust test with the source off GPIB error number 108 TEST PORT OVERLOAD REDUCE POWER GPIB error number TEST SET NOT FOUND CHECK I O CABLE The reflectometer lightwave section test set is not correctly connected to the display processor Check the ac line cord and the interconnect cable for proper connections GPIB error number 102 7 10 FINAL TRIM SIZE 7 5 in x 9 0 in Error Message Numbers Error Messages Error Message Numbers Number Error Message 1 OPTIONAL FUNCTION NOT INSTALLED 2 NVALID KEY 3 CORRECTION CONSTANTS NOT STORED 14 FUNCTION NOT VALID 15 O MARKER DELTA SPAN NOT SET 19 DISK MESSAGE LENGIH ERROR 20 AIR FLOW RESTRICTED CHECK FAN FILTER 2 POWER SUPPLY HOT 24 PRINTER not on not connected wrong addrs 26 PLOTTER not on not connected wrong addrs 28 PLOTTER NOT READY PINCH WHEELS UP 30 REQUESTED DATA NOT CURRENTLY AVAILABLE 31 ADDRESSED TO TALK WITH NOTHING TO SAY 32 NPUT ATTEMPTED WITHOUT SELECTING INPUT TYPE 33 SYNTAX ERROR 34 BLOCK INPUT ERROR 39 BLOCK INPUT LENGTH ERROR 36 CHANGE HP IB TO SYST CTRL or PASS CTRL 3 ANOTHER SYSTEM CO
199. ver to open the pull out fuse drawer as shown in the following figure FINAL TRIM SIZE 7 5 in x 9 0 in Installing To replace the line fuse 3 The recommended fuse for both line switch settings is a F3 0A 250V part number 2110 0780 Notice that an extra fuse is provided in a drawer located on the fuse holder e To change the fuse on the lightwave section 1 Disconnect the line power cord from the lightwave section 2 On the lightwave section use a flat blade screwdriver to pry open the line module cover door The cover door is hinged on the left side Pry beneath the tag that is located along the cover door s right side edge See the following figure 3 Pull out the fuse drawer The following list shows the recommended fuse 100V and 120V operation F1 5A 250V p n 2110 0043 220V and 240V operation F0 75A 250V p n 2110 0063 1 20 FINAL TRIM SIZE 7 5 in x 9 0 in CAUTION Cleaning Connections for Accurate Measure ments Accurate and repeatable measurements require clean connections Use the following guidelines to achieve the best possible performance when making measurements on a fiber optic system e Keep connectors covered when not in use e Use dry connections whenever possible e Use the cleaning methods described in this section e Use care in handling all fiber optic connectors e When inserting a fiber optic connector into a fron
200. x 9 0 in Contents 1 Installing Step 1 Inspect the shipment os 1 4 Step 2 Connect the two instrument sections ons 1 5 Step 3 Set the line voltage l l 1 7 Step 4 Connect the rear panel cables m 1 10 Step 5 Verify Operation a a a a a a 1 11 To replace the line fuse ls 1 19 Cleaning Connections for Accurate Measurements ss 1 21 To clean a non lensed connector 1 23 To clean an adapter 1 24 To test insertion loss a a a a a a 1 24 To test return loss a a a ee 1 25 Returning Your Instrument a a s s 1 26 To return the instrument for service e 1 27 Agilent Technologies Sales and Service Offices o 1 29 2 Performing Guided Setups and Calibrations Running Guided Setups and Calibrations m 2 6 To perform a guided setup devices with pigtail Dl 2 7 To perform a guided setup devices without pigtail 2 13 To perform a guided calibration 2 8 Performing Manual Calibrations 2 20 To balance the receiver 2 rn 2 23 To calibrate the magnitude 2 25 To calibrate for an external source 2 26 To turn off calibration data os 2 28 To enter the standard s reflection percentage Lee ee 2 28 To turn chromatic dispersion correction on and off 2 28 To use the Option 001 cable tray 2 29 Contents 1 FINAL TRIM SIZE 7 5 in x 9
201. y LOCAL ADDRESS CONTROLLER RST Sets the reflectometer to the factory preset condition Syntax RST or PRES Equivalent key SRE Service request enable The value is the mask which enables specific bits in the status byte for generating an SRQ Syntax SRE lt value gt STB Reads the status byte Syntax STB TST Executes an internal self test and returns the test result 0 pass 1 fail Syntax TST 4 14 FINAL TRIM SIZE 7 5 in x 9 0 in Instrument Commands Commands without Equivalent Softkeys Programming Instrument Commands The following syntax notation conventions are used in this section CAPITAL LETTERS U no nm nami CC C0 O0 O co co m oo B RM1 RM2 RM3 RM4 RM5 PUDATA PUFORM PULEAS PURAW1 Capital letters indicate the short form of a command The actual command is not case sensitive and can be entered in upper or lower case Characters appearing in angular brackets indicate a constant a pre assigned simple or complex numeric variable or string variable transferred to the reflectometer A space may be inserted between it and the command Square brackets indicate that whatever occurs within the brackets is optional Braces are used to clarify which elements are to be chosen from Or indicates a choice of exactly one element from a list for example lt a gt lt b gt indicates lt a gt or lt b gt but not both KEY
202. y SYSTEM DELTA LIMITS Sets an amplitude offset value for limit testing Syntax LIMIAMPO lt value gt suffix Item Description value Format dependent suffix DB MM UM NM S MS US NS PS FS 4 31 FINAL TRIM SIZE 7 5 in x 9 0 in LIMILIN E LIMIMAOF LIMIPOSO LIMITEST LIML Programming Instrument Commands Equivalent softkey SYSTEM AMPLITUDE OFFSET Sets limit lines on or off Syntax LIMILINE ON OFF Equivalent softkey SYSTEM LIMIT LINE on off Sets the active marker value to the amplitude offset for limit testing Syntax LIMIMAOF Equivalent softkey SYSTEM MARKER AMP OFS Sets a position offset value for limit testing Syntax LIMIPOSO lt value gt suffix Item Description value Domain dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey SYSTEM POSITION OFFSET Sets the limit testing on or off Syntax LIMITEST ON OFF Equivalent softkey SYSTEM LIMIT TEST on off Sets the lower limit value for a limit testing segment Syntax LIML lt value gt suffix Item Description value Format dependent suffix DB MM UM NM S MS US NS PS FS Equivalent softkey SYSTEM LOWER LIMIT 4 32 FINAL TRIM SIZE 7 5 in x 9 0 in LIMM LIMP LIMT LIM U Programming Instrument Commands Sets the middle value of delta limits Syntax LIMM lt value gt suffix Item Descrip
203. y 3 11 4 17 5 14 AVERAGING RESTART softkey 3 11 4 17 5 14 averaging traces 3 9 AVERFACT command 4 17 AVERO command 4 17 AVERREST command 4 17 AVG key 5 14 menu map 5 3 Avg status notation vii 5 14 BACI command 4 17 BACKGROUND INTENSITY softkey 4 18 5 15 BACK SPACE softkey 5 15 balance internal receiver 2 20 BALANCE RECEIVER softkey 4 18 5 15 BALD command 4 18 BALE command 4 18 BALR command 4 18 p 3 45 urning off 3 46 PDONE command 4 18 P DONE on off softkey 4 18 P DONE ON off softkey 3 46 5 15 PFAIL command 4 18 P FAIL on off softkey 4 18 P FAIL on OFF softkey 5 15 c 3 m Ga Ga emo U VVU GEE ou Ld iml beep to turn off 5 15 5 16 BEEPWARN command 4 18 BEEP WARN on off softkey 4 18 BEEP WARN on OFF softkey 3 45 5 16 Biconic adapter 5 53 BINARY softkey 5 24 block diagram 5 52 BLOCK INPUT ERROR error message 7 4 B B LOCK INPUT LENGTH ERROR error message 7 4 C cable part number 5 54 RIGHTNESS softkey 4 19 5 16 jou Index 3 FINAL TRIM SIZE 7 5 in x 9 0 in C cabinet cleaning 1 2 emperature 1 2 cables calibration 2 4 engths 2 7 line power 5 56 rear panel 1 10 cable tray 2 29 art number 5 54 CALD command 4 19 CALE command 4 19 CALFRES command 4 19 CALIBRATE MAGNITUDE softkey 4 19 5 16 CALIBRATE MENU softkey 5 16 calibration and span 2 5 manual 2 20 standard 2 16
204. y and programming in C send a command as follows iooutputs 716L PRES 5 Using an HP 9000 Series 300 technical computer with the HP BASIC language the same command would be sent as follows OUTPUT 716 PRES Use a semicolon to terminate each input string of program commands A line feed can also serve as a terminator For example either of the following is acceptable OUTPUT 716 PRES CLEARALL OUTPUT 716 PRES CLEARALL Some precision reflectometer commands can be issued as a query A query causes data to be returned to the computer from the instrument The data is returned as an ASCII string Queries are formed by adding the question mark 2 character to the command Refer to the command listing in this chapter to determine if a command can be used as a query syntax listed for each command For example sending the following command turns the HP IB command debug mode on OUTPUT 716 DEBUOFF Upon receiving this command the precision reflectometer sends a 1 to the computer A 1 indicates an on condition a 0 indicates an off condition Querying a settable functions such as SCAL returns the current function value then clears the instrument entry area Querying a command that does not have a defined response returns a zero The following example returns a value to the computer and then prints the value OUTPUT Hp8504 SCAL ENTER Hp8504 Scale PRINT Scale
205. y the precision reflectometer sweeps the measurement range continually Single sweeps are available by pressing MEAS SINGLE Each time this softkey is pressed one sweep is taken and then the sweep stops You also can force any sweep to restart at the beginning regardless of the current sweep position This is especially valuable in wide measurement spans where sweeps take a few seconds to complete To restart a sweep press MEAS MEASURE RESTART In addition to the internal 1300 nm and 1550 nm sources you can connect an external source for the measurements The external source input is provided as a convenience for users with very advanced applications It is not meant for the typical user When using an external source normal calibration and correction features are not applied to the measurement data Refer to To calibrate for an external source in Chapter 2 to learn how to calibrate the precision reflectometer for use with an external source To select the source wavelength 1 Press MENU 2 Press 1300 nm or 1550 nm to select the wavelength The EXTERNAL selection turns off the internal sources The external source input is provided as a convenience for users with very advanced applications Note that normal calibration and correction features are not available with an external source Use the entry keys to enter the wavelength of the external source 3 6 FINAL TRIM SIZE 7 5 in x 9 0 in Performing Measurem
206. y are displayed e They are included on plots and prints e In tabular format upper limit lower limit and pass fail margins are listed space permitting e Limit lines are saved in instrument states If limit testing is turned on e PASS or FAIL is displayed even if the limit lines are not displayed e Failing portions of the trace are displayed in a different color For each segment you must enter a starting position distance or time an upper and lower limit and the segment type Alternately you can enter delta limits instead of upper and lower limits For example a device may be specified at 0 dB 3 dB Enter the middle value as 0 dB and the delta limits as 3 dB You can enter these values using the key pad or by setting the marker at the value and pressing MARKER POSITION or MARKER MIDDLE Up to 22 limit line segments can be added to the table in any order The precision reflectometer automatically sorts them The table shows up to three segments to scroll through a longer table use the SEGMENT softkey In the table a pointer character gt shows which segment is selected for editing If you need edit a segment select it first using the SEGMENT softkey 3 20 FINAL TRIM SIZE 7 5 in x 9 0 in There are three segment types Performing Measurements Creating Limit Lines DATA log MAG 18 dB REF 5B dB 1 83 732 dB hp 35 mm C SEG POSITION nmi pper dB Lower dB TYPE

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