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Fluke Universal Frequency Counter PM6669 Operator`s Manual

1. 6 L LCD display LOG OTI eo cook ue mO 4 Listener function 21 LOC Casio le cM 16 LSD displayed 36 M Measuring FPREGARAO paa Aa 10 FRED NAO a aaa 10 Frequency A aaa 8 Frequency B 10 mi oro siete E 10 nul c 10 Time selection 12 Ko 21174 ep a 10 Width A a 12 Measuring time FOM GRIB M PEERS 24 GPIB 0d aa es 12 Sila 12 Specification 38 Measuring time selector button GO CATOM RR EE EO 4 MTCXO Calibration 7 Specification 97 N Normal output format GPIB Sean 28 O OPERATING INSTRUCTIONS 20 Operating the controls 8 Options Installation esi nee ans 6 Ordering information 40 Oscillator replacement See MTCXO Output mode GPIB a aa om 27 Output separator GPIB aaa 24 P Parallel poll 22 Period PM 6669 OPERATORS MANUAL INDEX From GPIB sas unco icis 24 Specification 35 Period A GPIB COJE nnana 10 Sell esn 10 PM 2201 GPIB example 33 PM 9604 See GPIB interface PM 9605 See Battery unit PM 9606 See Rack mount kit PM 9607 See MTCXO PM 9608B See HF input PM 9609 See Carrying case Power Requirements
2. Frequency A A0 Specification eene Frequency A AO Specification Frequency B FO GR IB ie ttis eee dies Page 43 GPIB COJE aaa 10 Selecting 10 Specification 35 Function GPIB COS Lalake 8 Selec AA 8 Function selection GPIB cists Uu Me Mais 24 Function selector button Ba eios RT 4 G Get See Triggered GPIB Specification 38 GPIB address selector LOCATION RU a 3 GPIB interface connector LOCA OM m ELS 3 GPIB INTERFACE OPEBATION 5 i actas 21 34 GUNI ada Anakan 6 H HF input Specification 36 High speed dump GP Bia Naihi aha bayan 28 High stability oscillator Installation 20 Hold 1e zi MENFES 16 HP controller GPIB example 32 IBM GPIB GPIB example 34 ID GP Bian haan luhan alla 22 Identity of the counter 22 Inaccuracy BIN AA AAP 36 Input A Operation maam ag 16 PM 6669 OPERATORS MANUAL Page 44 Specification 36 Input B OperaliOn Peor 16 Specification 36 Input separator GPIB wee eee ERE I EU 23 Input A BNC connector LOCATON eU S 4 Input B BNC connector LOGAN Naa t e ie eae 4 INSTALLATION 5 7 20 Installing options
3. FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION Move function cursor to SNGLE Qus du Ads HOLD AUTO EU Not bus FUNCTION FREQ A Ao selectable wp Y FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION Move function cursor to BNGEE a qa 5 06 HOLD SATO nr eae Not bus N FUNCTION FREQ A Ao selectable wr FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION MEASURING TIME TRIGGER LEVELA Move function cursor to SINGLE 029 18 Ag HOLD D UTO i SEA RPM A FUNCTION RPM A vv FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION MEASURING TIME TRIGGER LEVEL A Move function cursor to SINGLE 0 2s 1s 10s HOLD AUTO nr fr wi PER A FUNCTION PERA wr FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION MEASURING TIME TRIGGER LEVEL A Move function cursor to SINGLE 0 2s 1s 10s HOLD AUTO nr ri ina TOTM A FUNCTION TOTA NA FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION PM 6669 OPERATORS MANUAL OPERATING INSTRUCTIONS FUNCTION AND RANGE Reciprocal freque
4. 37 Power switch LOCATON RE E 4 Operating Mete es 8 Power inlet socket LOCATON gol TT 3 PRODUCT PRESENTATION 3 4 Programming check list 23 Pwidth A See Width A Q Queries GP Bete aaa Led 30 R Rack mount kit Specification 39 edb Geb crucis REUS 3 Hemote local 22 Removing the cover 6 Reset Operating the button 16 Specification 38 Reset button LOCATON EET TT 4 Resolution BI le AA 36 RPM Specifications nea 35 RPM A GPIB code 10 Specification 35 S SB NG NALANG RANA AL n La 2 Screws for removing the cover 3 Sensitivity Specification 36 Sensitivity control Location aa 4 Separators lalo AA MA 23 0 0 6 enisi o eroe tud 24 Service request 21 GPIB aaa anakan 26 Short output format GPIB nimi e yaan ana 28 Slope PROM GFI Beauce 25 See Trigger slope Source and Acceptor Handshake 21 SPECIFICATIONS 35 40 Start Stop Totalize FROM GPIB scc ceto 25 Operation detis an 16 Starting a new measurement See Reset Status byte GPIBa eee An 26 Store Ao Specifications 38 Selo a eee eee 2 T Talk only switch 22 Talker TUPIGHOE eoe e
5. numbers High speed Output MTCXO dump format compen sation 0 OFF NORMAL ON 1 OFF SHORT ON 2 OFF NORMAL OFF 3 OFF SHORT OFF 4 ON FOR HIGH OFF xx SPEED DUMP Default number is 0 when switching to local and back again the number will be reset to O The MTCXO compensation can be switched off to in crease the measuring speed providing a result with five digits accuracy is sufficient The time gained will be up to 400 ms measurement xx Must be in the end of a program message PM 6669 OPERATORS MANUAL Page 28 Output Format Normal When you select normal output format the output will be as follows Function command Header 3 6 characters same Header as used for selecting the function O when overflow otherwise space Measurement result always 9 digits and a decimal point Same number of significant digits as on the display of the counter leading zeroes fill out the rest of the 9 positions The leftmost digit can be replaced by a minus sign Separates the exponent from the digits Exponent sign or Exponent one digit Output separator LF if CR LF is selected as output separator FFFFFFOXXXXXXXXXXE4XS S EXAMPLE 21 22 characters Normal operation PER 000001 667E 4 Overflow PER 09 99999999E 9 Short Short format means that function command and leading zeros are not sent to the controller When you sel
6. Switches on or off SINGLE 02 NG TIME 10s HOLD AUTO Hep ack Not bus con N POI DISPL HOLD when de pa trollable but pressed Hz Free run OFF m will give a similar function STORE FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT See GPIB bus Ao A B A Ao A Ao A A A A REF FUNCTION operation INPUT A Connect the signal to 10Hz 160MHz a a INPUT A via a BNC Pwe C cable MAX 350Vp 4 IPHONE Connect the signal to 70MHZ 1 3GHz INPUT B via a BNC cable 50 Q e MAX 12Vtms PM 6669 OPERATORS MANUAL OPERATING INSTRUCTIONS Page 17 FUNCTION AND RANGE HINTS AND COMMENTS When reset is depressed the display and counting When the counter is controlled from the GPIB Bus registers are cleared When reset is released a new the LOCAL key can be disabled via the Local Lock measurement is started The Measuring time Func out command tionand display hold settings are not affected If the TOT A function is selected the RESET LOCAL key functions as a START STOP key One press Starts the counting and the next press stops it A long depression results in reset Display hold freezes the display but not until the measurement in process has been finished A new measurement can always be initiated via the RESET key Store Ao is used to store the constant used in func tions FREQ A Ag and FREQ A Ao The procedure is described under FUNCTIONS FREQ A Ao Use this input for all functions except FREQ B At
7. Hv Lco i CORRS ES EE TS 9r DOR CONTENTS Page 1 CONTENTS SAFETY meo iets isthe AA ee 2 Selecting Output Separator ssussese 24 NEO CUCU AAP 2 How to Select Function 24 Selecting Measuring Time eueueussssse 24 PRODUCT PRESENTATION eeeeeeee 3 Selecting Triggering eeeeeeeeesesesssssssss 25 General a pA AAP IGAN AA AASA 3 Totalize Start SiO aa AA 25 Rear VICW ccccccceccececccceccccceecuenececueeucatauneeeeauauceeaeeenenass 3 Free Run Triggered 22 an 25 FROME VIEW ec E 4 Service Reduesl cease ce idm E 26 Sic cis M PEE 26 INSTALLATION eererenee nnnm nnn nnnm nnne 5 Output Made eret eei eet hca ute adt edi ptit 27 Dnpaeokihg eesti tees mahalan 5 Bus Ledi RR naa a 30 Voltage Range Selection ess 5 Programming Data Out ssssseeeees 30 Grounding TELE 5 What Happens When Switch to Local 30 Connecting External Reference eese 6 Summary of Bus Commands ccceeeneue 31 Installing Oplang iuo Se orat e roce Rees Bs 6 Programming Examples seseseeeeeees 32 Calibrating the MTCXO eese 6 SPECIFICATIONS u s 35 OPERATING INSTRUCTIONS eene 8 Measuring Functions een 35 Using the Freque
8. PM 8911 1 5 GHz 5009 probe set 1 10 PM 8922 120 MHz 1 MQ probe set 1 1 and 1 10 PM 8943 650 MHz 1 MQ FET probe set PM 9581 50Q termination 3 W PM 9585 50Q termination 1 W All options mentioned above can be installed by the cus tomer NOTE The GPIB interface PM 9604 and the battery unit PM 9605 can not be installed together in a PM 6669 counter Manuals 4822 872 20021 4822 872 20022 4822 872 20023 4822 872 25006 4822 872 20016 Operators Manual Operators Manual German Operators Manual French Service Manual GPIB Pocket Guide APPENDIX 1 Page 41 APPENDIX 1 Checking the Sensitivity of Counters Introduction The sensitivity of a counter is normally specified as the minimum signal voltage on which the input of the counter will trigger correctly When you use a signal source with an output imped ance of 50Q constant output amplitude and the counter has a 50Q input impedance the input signal of the counter is in theory independent of the cable length However if the input impedance deviates from 50Q there will be standing wave reflections which will cause changes in the amplitude of the signal between the sig nal source and the counter input Two factors determine the magnitude of the changes i e frequency and capacitive load EXAMPLE For a 1 MQ 35 pF input the 35 pF parallel capacitance is approximately equal to a 50 capacitive load at 100 MHz Consequently it is of the utmost impor
9. READ RESULT STRING 280 Z Z VAL MIDS RDS 8 13 290 NEXT I 300 PRINT AVERAGE Z 10 S 310 CALL IBLOC CNT GO TO LOCAL 320 END Example of a result AVERAGE 9 980422E 06 S Ok SPECIFICATIONS Page 35 SPECIFICATIONS Measuring Functions Frequency A or B Range Freq A 0 1 Hz to 160 MHz Freq B 70 MHz to 1 3 GHz option PM 9608B Mode Reciprocal frequency counting LSD unit displayed 75 19 7 FREQ Measuring time Frequency A AQ A Frequency A measurement is performed The meas ured frequency is divided by the constant Ao before dis play The resolution of the displayed ratio is determined by the FREQ A measurement At power on Ao is set to 1 default Frequency A A9 A Frequency A measurement is performed The value of the constant Ao is substracted from the measured fre quency before display The resolution of the displayed difference is determined by the FREQ A measurement At power on Ao is set to O default RPM A A FREQUENCY A measurement is done The measured frequency is multiplied with 60 and shown on the dis play as revolutions per minute RPM Range 6 RPM to 720 10 RPM Period A Range 8ns to 2 10 s Mode Single period measurement SINGLE or period aver age measurement at 0 2 1 or 10 s Measuring times LSD Displayed SINGLE period measurement 100 ns TIME lt 100s 5 x PERIOD 1 TIME gt 100s S Period average measurement 95 x107 PERI
10. 70 probability 210 SINGLE Period A and Width A Resolution equals 1 LSD unit Inaccuracy Inaccuracy i e the relative error depends on the following factors Resolution FREQ PERIOD or WIDTH relative trigger error relative time base error I I Relative trigger error Freq A Period A noise voltage A Vpp signal slopeA Vs meas time Relative time base error is deviation from 10 MHz i 10 MHz PM 6669 OPERATORS MANUAL SPECIFICATIONS Input specifications Input A Frequency Range 0 Hz to 160 MHz Sensitivity Sine 10 mVnus 10 Hz to 120 MHz 30 mVRms typically 120 MHz to 160 MHz Pulse 30 mVrms 0 1 Hz to 120 MHz Coupling AC Impedance 1 M9 30 pF Attenuation Continously variable in two ranges be tween x1 and x400 Filter Switchable 50 kHz low pass noise filter on Input A with a suppression of 20 dB at 200 kHz Trigger Levels Three different levels for triggering on signals with various duty factors and AUTO IU symmetrical input signals should be selected forinput signals with a duty factor of 0 25 to 0 75 IT positive pulses for input signals with duty factor 2596 TL negative pulses for input signals with duty factor 2 596 AUTO Trigger Levels The counter will make test set tings and automatically selects the best trig level setting AUTO requires repetetive signals with a repetition rate gt 100 Hz AUTO is not active in TOTALIZE A measure ments Trigger Slop
11. Event bit Abnormal bit Always O during normal measurements 1 if something is wrong Affects bit 0 3 see below Event bits 4 0 Main Gate closed 1 Main Gate open 3 0 Depends on Abnormal bit see below Event bits Bit Abnormal bit 1 Abnormal bit 0 0O O N 3 Not Used Measuring stop enable 2 Time Out Measuring start enable 1 Hardware fault Ready for triggering 0 Programing error Measuring result ready Only if SRQ mask is set for Service Request xx This is a conditional bit that monitors the Main Gate in the counter When TOT MAN is selected the bit will always be O Measuring start enable indicates that the counter logic is ready to start a measurement Measuring stop enable indicates that the counter logic ir ready to stop a measurement These bits can be used to detect if the input signal to the counter is present If the counter never stops it s meas urement and the status byte stops at XX00X1XX No input signal The measurement is ready to start bit 2 1 but the Main Gate has not opened bit 4 0 XX011XXX Input signal lost during measurement The measurement is ready to stop bit 3 1 but the main gate is still open bit 4 1 X don t care NOTE SRQ is normally not used for these bits Ready for triggering indicates that all preparations for a measurement is completed The preparation time de pends on selected functions It can be up to 700 ms when auto triggerin
12. mand GET before it starts NOTE The minimum time between OUTM 4 and GET is 70 ms Stopping Any programming command from the controller will end High Speed dump High speed dump is stopped inbet ween two measzurements If you switch on high speed dump without having an input signal the counter must be switched off on to regain control over the counter NOTE The Power switch is the only front panel control that will stop High Speed dump the LOCAL key will not have any effect Output Format The output format will always be two letters followed by 12 hexadecimal digits The two letters will tell the control ler how to evaluate the twelve hex digits which repre sent the contents in the internal registers of the counter Formula Multiplier Hex digits Separators FM111111222222S S 15 16 characters The counter cannot signal EOI together with the out put separator when High speed dump is selected GPIB INTERFACE OPERATION Hex Digits All 12 digits together represent register 3 MSB LSB 111111222222 333333333333 When the digits are divided into two groups the first six digits represents register 1 and the last six digits repre sent register 2 MSB LSB MSB LSB YY Y y 111111 222222 Formula Depending on the selected measuring function different calculations must be made to convert the register con tents to readable measuring results The first letter F in the outpu
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14. 13 10 CR LF can be pro grammed The EOl line can be programmed to be active together with the last output byte sent Output Format Measuring result is sent as Function code 3 to 6 characters Normally space O on overflow Measuring result Exponent pointer Exponent sign or Exponent value 0 to 9 Selected separator Second separator LF only if output separator CR LF has been selected 21 22 characters FFFFFFOXXXXXXXXXXE XS S When you select Short output format FFFFFF and lead ing zeroes are omitted High Speed Dump The contents of the counting registers are transferred to the controller without being processed by the counter The processing must be done in the controller instead Max output rate is approximately 100 readings s The output format is FMXXXXXXXXXXXXS S where F is calculation formula M is multiplier X X 12 hex dig its representing the register contents and S S is the set output separator Ranges Same as for normal operation with the following exceptions Frequency Max measuring time 1 s Period Average Max measuring time 1 4 s Time Interval Average Onsto 1 6s Max measuring time 4 s Ratio A B O and 6 10 to 1 6 10 Ratio B A O and 6 10 to 1 6 10 Ratio C A C B 8 to 4 10 Max Data Output Rate Normal mode gives gt 5 read ings s High speed dump gives 5100 readings second Page 39 T
15. 2 320 EVALUATE REGISTER 1 330 R1 0 340 FOR I 1 TO 8 350 S NUM BS I 1 48 360 IF S gt 10 THEN S S 7 370 R1 R1 16 S 380 NEXT I 390 EVALUATE REGISTER 2 400 R2 0 410 FOR I 9 TO 14 420 S NUM BS I I 48 430 IF S gt 10 THEN S S 7 440 R1 R2 16 S 450 NEXT I 460 EVALUATE RESULT 470 IF FS C THEN R 10000000 R2 R1 480 IF FS F THEN R R1 16 6 R2 PM 6669 OPERATORS MANUAL GPIB INTERFACE OPERATION 490 IF F G THEN R R2 R1 500 IF F I THEN R 0000001 R1 R2 510 IF F J THEN R 0000001 R1 16 6 R2 520 IF F K THEN R 0000001 R2 R1 530 IF M H THEN R R 60 540 IF M L THEN R R 256 550 IF M N THEN R R 10 560 IF M O THEN R R 10 570 IF M P THEN R R 1 580 DISP B R 590 NEXT K 600 LOCAL 710 610 END Example of a result MEASURING TIME WILL BE SELECTED BY HP85 SINGLE ANSWER Y WHEN READY TO START 2 Y MAKE 500 MEASUREMENTS READY ELAPSED TIME 3 931 S FIRST 5 RESULTS JP000000000031 0000049 JP000000000030 0000048 JP000000000031 0000049 JP000000000031 0000049 JP000000000031 0000049 5053 GPIB INTERFACE OPERATION For IBM PC with PM 2201 Example 1 The following example runs on an IBM compatible PC equipped with Fluke PM 2201 GPIB interface The instal lation and starting up of the PC program is not de scribed only the application program Line 1 to 100 must contain the declaration described in the PM 2201 manual The program sets up the counter fo
16. PM 2534 to 35 or a FLUKE 8840 Digital Multimeter or another PM 666X counter High Stability Time Base PM 9607 See specifications for optional MTCXO time base HF Input PM 9608B See specifications for optional Input C Ordering Information Versions The PM 6669 ordering number consists of the basic type number and a 3 digit XYZ suffix specifying the re quired con figuration indicating maximum frequency 0 3 or 4 indicating time base oscillator 1 or 3 indicating interface 1 3 or 6 PM6669 X Y Z Type No PM 6669 01 1 Description Frequency counter 160 MHz frequency range uncompensated oscillator 5 10 month incl operators manual PM 6669 4 As above but including 1 3 GHz HF input PM 9608B PM 6669 3 As above but including crystal oscillator PM 9607 MTCXO PM 6669 3 As above but including battery unit PM 9605 PM 6669 6 As above but including GPIB interface PM 9604 Example PM 6669 416 means a PM 6669 frequency counter including both an 160 MHz and an 1 3 GHz input channel an uncompensated oscillator and a GPIB interface PM 6669 OPERATORS MANUAL SPECIFICATIONS Options and Accessories PM 9604 GPIB interface PM 9605 Battery unit PM 9606 Rack mount kit PM 9607 MTCXO time base PM 9608B 1 3 GHz HF input PM 9609 Carrying case PM 2296 50 IEEE to IEC adapter PM 2295 05 IEEE cable 0 5 m PM 2295 10 IEEE cable 1 m PM 2295 20 IEEE cable 2 m
17. advanced programming check the following steps Select Trigger slopes Default AUTO Set Output separator Default LF Set EOI mode Default OFF Set service request SRQ mask Default No SRQ Select Free Run on or off Default ON f Free Run is off select Time Out if desired Default Infinite programmed as 0 s Set Output mode Default Normal output format High speed dump OFF and MTCXO compensation ON All functions and commands in the checklist will be ex plained later NOTE You only have to program the changes from the previous set up Page 23 Syntax What is a Programming Command A programming command consists of a header address ing the function you want and a bogy instructing the function what to do EXAMPLE TRGSLP POS HEADER addressing Trigger Slope BODY switching slope to positive NOTE Some programming commands consists only of the Header e g trigger command X What is a Programming Message A programming message is a number of programming commands with separators between them E g the com mands necessary to set up a measurement EXAMPLE PER A MTIME 0 Input Separator All communication between the counter and the control ler uses sequences of ASCII characters terminated by a separator Input separators are the separators sent by the controller They are used in four different places Between As unit Between To
18. be set to any value between 100 ms and 25 5 s the minimum increment is 100 ms Time Out Command Comment 100 ms TOUT 0 1 Time Out is only intended to be used with Free Run off Off TOUT 0 Always send this command when Free Run is switched on Default Time Out is not indicated on the display When the counter switches to LOCAL Time Out is off but when switched to remote again the set Time Out will be active again B Time out can be switched on when free run is on but it will not serve any purpose PM 6669 OPERATORS MANUAL Page 26 Bus Triggering X will always cause the counter to start a new measure ment X will work as group execute trigger GET X must always be placed in the end of a program message Service Request The counter can send a service request SRQ when it wants service from the controller After an SRQ the con troller must execute a serial poll which means that it must ask each of the instruments for status information until it finds the SRQ giving instrument evaluate the Status byte of the instrument and then make a decision what to do To enable the counter to send service requests you must set an SRQ mask telling the instrument which con ditions will cause SRQ Comment numbers is a decimal value depending on selected SRQ reasons Bit Decimal value Reason for SRQ Command MSR number y 128 Not used 6 64 Time Out 5 32 Hardware fault 4 16 Programming err
19. end a header and separator Program program body between commands message bodies space comma lt semicolon gt linefeed nn FREQ A B FRUN ON The separators in the example above are the ones nor mally used in respective place The counter will however accept any one in any place The following separators will also work in any of the four places colon CR ETB ETX the separator selected as output separator as well as an active EOl signal PM 6669 OPERATORS MANUAL Page 24 Order of Commands in a Program Message Normally the programming commands in a program ming message can be placed in any order However the following commands must always be placed at the end of a program message since any com mand sent after them will disable the selection INPA MEAC FNC X BUS ID OUTM 4 These commands will be ignored if found anywhere but in the end of a message lt number gt In some program commands the body is replaced by the term lt number gt or lt num gt Here you must enter a nu merical value lt number gt can be entered in any format you like e g 1 23 can also be entered as 0 000000123 10 or 1230000 10 If you enter more digits than the counter needs your entry will be trun cated The counter will stop if an entry is out of the count ers range To proceed the status message Program ming error must be reset see Status byte Selecting Output Separator Output
20. higher frequencies use a 50 termination type PM 9585 to avoid interference caused by impedance Range 10 Hz to 160 MHz mis match Impedance 1 M 30 pF The illustration below shows which function block Min pulse duration 4 ns each of the input controls affect Sensitivity AC Spec Typically DC Spec Trigger level offset e Y Attenuator Filter 30MHz 120 MHz 160 MHz Counting Max voltage 350 V DC AC eak 8V RMS 0 440 Hz 120 MHz Sensitivity Sensitivity range switch control This is the HF input which must be used when the FREQ B function is selected If the Frequency Counter does not include the Input B option the BNC connector is replaced by a plastic plug Range 70 to 1300 MHz Impedance 500 Sensitivity 10 mVnus up to 900 MHz 15 mVnus 900 1100 MHz and 40 mVRMS above Max voltage 12 VRMS Figure 7 Input circuit block diagram PM 6669 OPERATORS MANUAL Page 18 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL INPUT A Pull the SENSITIVITY Not adjustable ye knob to switch to AC from the bus 4 MIN sU 10mVrms 200mVrms coupling Depress the knob to switch to DC coupling NOTE The potentiometer controls the sensitivity when AC coupled and Trigger Level when DC coupled Turn the knob clockwise to increase and counter clockwise to decrease the trigger level or sensitivity One two position switch Not bus INPUT A Depress to switch on control
21. 03 per sists call Fluke service Look on the last page in this manual for Phone No and address GPIB INTERFACE OPERATION Page 21 GPIB INTERFACE OPERATION Introduction The PM 6669 can be controlled by a computer control ler via the GPIB interface option PM 9604 All functions that can be controlled from the front panel can also be controlled via the bus in a similar way except selection of measuring functions FREQ A Ao and FREQ A A the filter the sensitivity controls and the power switch The additional micro processor on the interface board has made it possible to add functions You can obtain con tinuously variable Measuring time bus learn high speed dump etc but these functions are only accessi ble via the bus To select a function you send a command to the counter We have chosen the text on the front panel as commands wherever possible in order to make them easy to remember E g the command to select Fre quency B is FREQ B and the command to select Period Ais PER A NOTE The characters in a command can be in both up per and lower case What Can I Do Using the Bus All the capabilities of the interface for the PM 6669 are explained below If you want a complete description of all GPIB interface functions read the Fluke Instrumenta tion Systems Reference Manual Summary Description Code Source handshake SH1 Acceptor handshake AH1 Control function CO Talker Function T5 Listener f
22. 311 Fax 91 22 495 0498 Indonesia P T Daeng Brothers Service Center Philips House J n H R Rasuna Said Kav 3 4 Jakarta 12950 Phone 62 21 520 1122 Fax 62 21 520 5189 Israel R D T Electronics Engineer Ltd Service Center P O Box 58013 Tel Aviv 61580 Phone 972 3 645 0745 Fax 972 3 647 8908 Italy Fluke Italia S R L Customer Support Services Viale Delle Industrie 11 20090 Vimodrone MI Phone 39 2 268 434 203 Fax 39 2 250 1645 Japan Fluke Corporation Japan Service Center Sumitomo Higashi Shinbashi Bldg 1 1 11 Hamamatsucho Minato ku Tokyo 105 Phone 81 3 3434 0188 Fax 81 3 3434 0170 Korea Il Myoung Inc Service Center Youngdong P O Box 1486 780 46 Yeogsam Dong Kangnam Ku Seoul Phone 82 2 552 8582 4 Fax 82 2 553 0388 950427 B amp P International Co Ltd Service Center Geopyung Town A 303 203 1 Nonhyun Dong Kangnam ku Seoul 135 010 Phone 82 02 546 1457 Fax 82 2 546 1458 Kuwait Yusuf A Alghanim amp Sons W L L P O Box 223 Safat Alghanim Industries Airport Road Shuwaikh 13003 Kuwait Phone 965 4842988 Ext 2079 Fax 965 4847244 Malaysia Cnn Sdn Bhd Service Center 17D 2nd Floor Lebuhraya Batu Lancang Taman Seri Damai 11600 Jelutong Penang Phone 60 4 657 9584 Fax 60 4 657 0835 Mexico Metrologia Y Calibraciones Ind S A De C V Industrial S A De C V Diagonal No 27 3er Piso Entre Calle De Eugenia Y Ave Colonia De
23. Battery Care The capacity of the rechargeable battery degrades if the counter is not powered by the battery frequently To keep the battery from degrading cycle the battery from fully charged to fully discharged occasionally The capacity of a degraded battery can be restored by cycling the battery a number of times but a restored bat tery will never reach the capacity of a new one If you must store your counter for some time without us ing it store it in a cool and dry place Leave the counter with the mains cable connected if possible If not don t disconnect the mains cable until the battery is fully charged then charge the battery for at least 8 hours every 3 months CAUTION Prolonged storage or use of the counter at temperatures above 40 C shortens the life of the battery The battery will freeze if it is not sufficiently charged when stored at a low temperature 75 charge is sufficient for 40 C PM 6669 OPERATORS MANUAL Error Codes The counter can display the following error codes if something goes wrong Error OF Overflow in the counting registers Select a shorter Measuring time if you get this error code unless the counter is set to TOTALIZE then you must press reset and start again from zero Error 01 RAM memory error Error 02 Measuring logic error Error 03 Internal bus error If the counter shows one of these error codes try switch ing the counter off and on again If error code 01
24. CE OPERATION Example 3 This program prompts the user to input a programming sequence The sequence is then sent to the PM 6669 and the corresponding measuring result is read Let us as an example select Single Period measure ments without AUTO triggering gives faster operation 100 DEMO PROGRAM 110 PM6669 AND IBM PC WITH PM2201 120 GPIB INTERFACE AS CONTROLLER 130 CLS CLEAR SCREEN 140 AD 7 ADAPTOR NUMBER 150 ADDR 710 COUNTER ADDRESS 160 SC 1 SYSTEM CONTROLLER 170 CALL IOINIT AD SC INIT INTERFACE 180 TIME 10 TIMEOUT AFTER 10 SECONDS 190 CALL IOTIMEOUT AD TIME 200 CALL IOCLEAR ADDR SEND SDC 210 PRINT INPUT YOUR PROGRAMMING MESSAGE 220 PRINT TO QUIT THE PROGRAM ANSWER 230 LINE INPUT S 240 L LEN S LENGTH OF STRING TO SEND 250 IF L lt gt 1 GOTO 280 260 IF S lt gt GOTO 280 270 END 280 CALL IOOUTPUTS ADDR SS L OUTPUT STRING 290 TO BE SURE TRIGGER COUNTER 300 CALL IOTRIGGER ADDR 310 GET THE MEASURING RESULT 320 MAX 25 330 ACT20 340 RESS SPACES 25 350 CALL IOENTERS ADDR RESS MAX ACT 360 PRINT 370 PRINT RESULT READ AS RESS 380 PRINT 390 GOTO 210 Example of a result INPUT YOUR PROGRAMMING MESSAGE TO QUIT THE PROGRAM ANSWER PER A MTIME 0 RESULT READ AS PER 0000001 00E 5 INPUT YOUR PROGRAMMING MESSAGE TO QUIT THE PROGRAM ANSWER PM 6669 OPERATORS MANUAL For IBM PC with IBM GPIB This example runs on an IBM PC wit
25. L 50 kHz filter switch Input A left of the display No rounding off M Input B BNC connector optional U Trigger level setting button N Power switch V Tilting support O Reset button doubles as Local button if the Fre The selected function is indicated on the display A quency Counter is equipped with an GPIB inter short press on the button moves the cursor one face Starts and stops counting if the TOT A step to the right A long press makes the cursor function is selected scroll PM 6669 OPERATORS MANUAL INSTALLATION Page 5 INSTALLATION Unpacking If the Frequency Counter is cold leave it in the cardboard box until it has reached normal room temperature Lift the Frequency Counter out of the box Remove the polystyrene supports Unpack the Frequency Counter from the plastic bag Reverse the procedure to pack Check List Has the Frequency Counter been damaged in transport If it has file a claim with the carrier immediately and notify the Fluke sales amp service organization to make repair or replacement of the instrument easier Check that the package contains the following items in addition to the Frequency Counter This Operators Manual A power cable with protective earth conductor A Battery unit if ordered An MTCXO oscillator if ordered AGPIB interface if ordered An HF input if ordered Labels on the rear panel ind
26. Meydan Apt No 49 Daire 23 Akatlar 80630 Istanbul Phone 90 212 2827838 Fax 490 212 2827839 Service Centers U A E Haris Al Afaq Ltd P O Box 8141 Dubai Phone 971 4 283623 Fax 971 4 281285 U S A Fluke Corporation Service Center Palatine 1150 W Euclid Avenue Palatine IL 60067 Phone 1 708 705 0500 Fax 1 708 705 9989 E Mail larry wz fluke com Fluke Corporation Service Center Paramus W 75 Century Road Paramus NJ 07652 0930 Phone 1 201 599 9500 Fax 1 201 599 2093 E Mail gleckler wz fluke com Fluke Corporation Service Center Everett Building 4 1420 75th St S W Everett WA 98203 Phone 1 206 356 5560 Fax 1 206 356 6390 E Mail ed wz fluke com Fluke Corporation Service Center Irvine 16815 Von Karman Ave Suite 110 Irvine CA 92714 Phone 1 714 863 9031 Fax 1 714 757 7556 E Mail miker wz fluke com 950427 Fluke Corporation Service Center 46610 Landing Parkway Fremont CA 94538 Phone 1 510 651 5112 Fax 1 510 651 4962 E Mail gbondy wz fluke com Fluke Corporation Service Center Dallas 2104 Hutton Drive Suite 112 Carrollton TX 75006 Phone 1 214 406 1000 Fax 1 214 406 1072 E Mail oldman wz fluke com Fluke Corporation Service Center Orlando 550 S North Lake Blvd Altamonte Springs FL 32701 5227 Phone 1 407 331 2929 Fax 1 407 331 7710 E Mail wwitko wz fluke com United Kingdom Fluke United Kingdom Ltd Customer Support Service
27. OD Measuring time Totalize A Event counting is controlled by the START STOP button Sequential start stop counts are accumulated RESET closes the gate and resets the Frequency Counter to zero Range 0 to 1 10 with indication of k or M Kilo pulses or Megapulses The result is truncated if out of display range Frequency Range Sine Wave 0 Hz to 16 MHz Pulse 0 Hz to 16 MHz Pulse Pair Resolution 8ns LSD displayed 1 unit count counts lt 10 5 counts 10 counts 2 10 Width A A positive Pulse Width measurement is performed Measuring time selection is not valid always SINGLE measurement Range 100 nsto2 109 s PM 6669 OPERATORS MANUAL Page 36 LSD Displayed 100 ns Time lt 100 s RB LUE rimes toia 10 5s NOTE Triggering on 50 of amplitude will occur only if the duty factor of the signal is 0 5 Definitions LSD Displayed LSD Unit value of the least significant digit displayed All calculated LSD s see section Meas uring functions should be rounded to the nearest dec ade e g 0 3 Hz is rounded to 0 1 Hz and 5 Hz to 10 Hz and cannot exceed the 9th digit Resolution Resolution smallest increment between two measuring results on the display due to the 1 count error Freq A B and Period A Resolution can be 1 LSD unit or 2 LSD units e LSD Measuringtime FREQor PERIOD the resolution is 2 LSD units 80 probability Other wise resolution is 1 LSD unit
28. PC WITH PM2201 120 GPIB INTERFACE AS CONTROLLER 130 AD 7 ADAPTOR NUMBER 140 ADDR 710 COUNTER ADDRESS 150 SC 1 SYSTEM CONTROLLER 160 CALL IOINIT AD SC NIT INTERFACE 170 180 190 200 210 220 230 240 250 260 210 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 TIME 10 Page 33 TIMEOUT AFTER 10 SECONDS CALL IOTIMEOUT AD TIME CLS CLEAR SCREEN ASK FOR AND PRINT PROGRAM DATA PRINT S GOSUB A 1 GOSUB S GOSUB A 2 GOSUB S GOSUB A 2 GOSUB S PRINT GOSUB A 1 GOSUB S PRINT GOSUB A 1 GOSUB S PRINT PRINT GOSUB A 1 GOSUB CALL IOLOCAL ADDR END L LEN SS COUNTING SETTING FNC 520 550 MEAC 520 550 BUS 520 550 INPA INPA 520 550 INPB INPB 520 550 W ID W COUNTER TYPE 520 550 GO TO LOCAL LENGTH OF STRING TO SEND CALL IOOUTPUTS ADDR S L UTPUT STRING RETURN FOR I 1 TO A MAX 25 ACT 0 RESS SPACES 25 CALL IOENTERS ADDR RESS MAX ACT BS PRINT LEFTS RESS ACT BS NEXT I RETURN Example of a result COUNTER SETTING TIME A B MTIME1 00 FRUN ON TOUT 00 0 MSR 000 O0UTM 000 EIO OFF SPR 010 INPA TRGSLP NEG INPB TRGSLP POS COUTER TYPE PM6669 016 22 Ok PM 6669 OPERATORS MANUAL Page 34 GPIB INTERFA
29. PO The counter does not have any parallel poll facility Device Clear DC1 The controller can reset the counter forcing it to default settings via interface message DCL Device clear or SDC Selective Device Clear Device Trigger DT1 You can start a new measurement from the controller via interface message GET Group Execute Trigger Bus Drivers E2 The GPIB interface has tri state bus drivers Connecting the Controller The bus interface connector is on the rear panel of the counter If your counter does not have any connector you must install the GPIB interface option GPIB connector Address switch SUPPORTED IEEE 488 INTERFACE SUE Ir FUNCTIONS gam ee KR vi ERI RLI DO1 DT1 E2 AA s INCLUDED OPTIONS INCLUDED OPTIONS EXTREFINPUT Wn PM9604 O PM 9608B SELECTOR O PM9605 O O PM9607 O e 10MHz 0 5 15Vrms THERMAL FUSE IN MAINS TRANSFORMER GPIB connector and address switch the numbers above the switches indicate the sig nificance of each switch Figure 8 Connect the controller via an IEEE 488 cable to the bus connector If you use IEC 625 cables an adapter is available see ordering information at the end of this manual Giving the Counter an Address The counter must have a unique address so that the controller can communicate with it The address is se lected by setting switches to the binary equivalent of the address you want The sw
30. RUCTIONS Using the Frequency Counter CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL POWER a two position SINGLE 28 is 10s HOLD AUTO tn No control I ON 3 o E mechanical push button Q a a 2a a 2a a a possible but D Pressed ON a Na Ga ipa a a ka ka ka NG gives the same Ep Released B OFF s UI E EE baal be cate settings as ES v v v v v v v v J after power ON FREQ FREQ FREQ Biro HEN PER TT WIDTH pal FUNCTION MEASURING TIME DISPL TRIGGER LEVEL A SINGLE 0 2s 1s 10s HOLD AUTO ILI FN iri 7 Pp LI NU A FREQ ERES PRES FREQ REM PER TOT Hil EXT FUNCTION A short depression of One code for FUNCTION the FUNCTION key each function moves the cursor in the see below m lower edge of the display one step to the right If the key is held depressed the cursor will scroll to the right until released When the cursor reaches the rightmost position it jumps back to the leftmost position and continues from there MEASURING TIME 1s Move function cursor to SINGLE 02s FUNCTION FREQ A wr 10s HOLD AUTO nr an FREQ A N FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION PM 6669 OPERATORS MANUAL OPERATING INSTRUCTIONS Page 9 FUNCTION AND RANGE HINTS AND COMMENTS Switches the power ON and OFF When switched on WARNING The po
31. Silsilah Co Sales amp Service Department P O Box 203 21411 Jeddah Phone 966 2 6610006 Fax 966 2 6610558 Singapore Fluke Singapore Pte Ltd Service Center 27 03 PSA Building 460 Alexandra Road Singapore 0511 Phone 65 276 5161 Fax 65 276 5759 Service Centers South Africa Spescom Measuregraph Pty Ltd Service Center SPESCOM Park Crn Alexandra Rd amp Second St Halfway House Midrand 1685 Phone 27 11 315 0757 Fax 27 11 805 1193 Spain Fluke Ib rica S L Customer Support Services Centro Empresarial Euronova C Ronda De Poniente 8 28760 Tres Cantos Madrid Phone 34 1 804 2301 Fax 34 1 804 2496 Sweden Fluke Sverige AB Customer Support Services P O Box 61 S 164 94 Kista Phone 46 8 751 0235 Fax 446 8 751 0480 Switzerland Fluke Switzerland A G Customer Support Services Rutistrasse 28 8952 Schlieren Phone 41 1 730 3310 Fax 41 1 730 3720 Taiwan R O C Schmidt Scientific Taiwan Ltd Service Center 5th Floor No 178 Section 2 Min Sheng East Road Taipei Phone 886 2 501 3468 Fax 886 2 502 9692 Thailand Measuretronix Ltd Service Center 2102 31 Ramkamhang Road Bangkok 10240 Phone 66 2 375 2733 Fax 66 2 374 9965 The Netherlands Fluke Nederland B V Customer Support Services Science Park Eindhoven 5108 5692 EC Son Phone 31 40 644310 Fax 31 40 644321 Turkey Pestas Prof Elektr Sistemler Tic ve San A S Selcuklar Caddesi
32. afety procedures in addition to the safety precautions stated in this manual to ensure per sonal safety and safe operation of the Frequency Counter Caution amp Warning Statements You will find specific warning and caution statements where necessary throughout the manual Do not carry out repairs or adjustments to the Frequency Counter without reading the Service Manual which contains the relevant warnings for such activities PM 6669 OPERATORS MANUAL CAUTION Indicates where incorrect operating pro cedures can cause damage to or destruction of equipment or other property WARNING Indicates a potential danger that re quires correct procedures or practices in order to prevent personal injury Symbols Indicates where the protective ground lead is connected inside the instrument Never unscrew or loosen this screw If in doubt about safety Whenever you suspect that it is unsafe to use the instru ment you must make it inoperative clearly mark it to pre vent its further operation and inform the Fluke service Centre E g The instrument is likely to be unsafe if it is vis ibly damaged PRODUCT PRESENTATION Page 3 PRODUCT PRESENTATION General Rear View The PM 6669 is a compact high resolution reciprocal Fre A Rear feet quency Counter which performs many functions A num ber of options are available i e HF input GPIB interface SEINS TORTOR nana COVEN high stability oscillator and rechargeab
33. ales amp Service Manager 15 25th March Street P O Box 3153 177 78 Tavros Athens Phone 30 1 4894911 Fax 30 1 4818594 Hong Kong Schmidt amp Co Ltd Service Center 1st Floor 323 Jaffe Road Wanchai Phone 852 9 223 5623 Fax 852 834 1848 Hungary MTA MMSZ Kft Service General Manager Etele Ut 59 61 P O Box 58 H 1502 Budapest Phone 361 186 9589 Fax 361 161 1021 Iceland Taeknival Hf P O Box 8294 Skeifunni 17 128 Reykjavik Phone 354 1 681665 Fax 354 1 680664 India Hinditron Services Pvt Ltd Service Center 204 206 Hemkunt Tower 98 Nehru Place New Delhi 110 019 Phone 91 11 641 3675 Fax 491 11 642 9118 Hinditron Services Pvt Ltd Service Center Emerald House 5th Floor 114 Sarojini Devi Road Secunderabad 500 003 Phone 91 40 844033 Fax 91 40 847585 Hinditron Services Pvt Ltd Service Center Castle House 5th Floor 5 1 A Hungerford Street Calcutta 700 017 Phone 91 33 247 9094 Fax Hinditron Services Pvt Ltd Service Center Hinditron House 23 B Mahal Industrial Estate Mahakali Caves Road Andheri East Bombay 400 093 Phone 91 22 836 4745 Fax 91 22 836 4682 India Hinditron Services Pvt Inc Service Center 33 44A 8th Main Road Raj Mahal Vilas Extension Bangalore 560 080 Phone 91 80 334 8266 Fax 91 80 334 5022 Philips India Limited Service Center Band Box House 254 Dr Annie Besant Road Bombay 400 025 Phone 91 22 493 0
34. artment Langeveldpark Unit 5 amp 7 P Basteleusstraat 2 4 6 1600 St Pieters Leeuw Phone 32 2 331 2777 Ext 218 Fax 32 2 331 1489 Bolivia Coasin Bolivia S R L Casilla 7295 La Paz Phone 591 2 340962 Fax 591 2 359268 Brazil Sistest Av Ataulfo De Paiva 135 S 1117 Leblon 22 449 900 Rio De Janeiro Rj Phone 55 21 259 5755 Fax 55 21 259 5743 950427 Sigtron Instrumentos E Servicos Ltda Rua Alvaro Rodriques 269 Brooklin Sao Paulo Sp Phone 55 11 240 7359 Fax 55 11 533 3749 Philips Medical Systems Ltda Service Center Av Interlagos North 3493 Campo Grande 04661 200 Sao Paulo S P Phone 55 11 523 4811 Fax 55 11 524 4873 Bulgaria Ac Sophilco Customer Support Services P O Box 42 1309 Sofia Phone 359 2 200785 Fax 4359 2 220910 C S F R ELSO NA Berance 2 16200 Praque 6 Phone 42 2 316 4810 Fax 42 2 364986 Canada Fluke Electronics Canada Inc Service Center 400 Britannia Road East Unit 1 Mississauga Ontario L4Z 1X9 Phone 1 905 890 7600 Fax 1 905 890 6866 Chile Intronica Service Center Instrumentacion Electronica S A C I Guardia Vieja 181 Of 503 Casilla 16500 Santiago 9 Phone 56 2 232 3888 China Fluke Service Center Service Center Room 2111 Scite Tower Jianguomenwai Dajie Beijing 100004 Phone 86 10 512 3436 Fax 86 10 512 3437 Colombia Sistemas E Instrumentacion Ltda Service Center Carrera 21 No 39A 21 Of
35. ate 0 2 s for all programmed Measuring times except SIN GLE which will be indicated as usual Selecting Triggering The trigger level can be selected in the same way as from the front panel Trigger level offset Code Comment Auto TLO AUT Default JU TLO POS AVI TLO SYM VL TLO NEG The trigger level cursor on the front panel willindicate the setting Trigger slope Command Comment Positive TRGSLP POS Default Negative TRGSLP NEG Negative slope is only available via the bus and is used when you want to measure the negative Pulse width When the counter switches to local the trigger slope will switch back to positive Trigger slope is not indicated on the display Totalize Start Stop When TOT Ais selected the gate is opened and closed by the controller instead of by pressing the button on the front panel To start the counting after selecting TOTM A the gate must be opened Totalize Command Comment Start GATE OPEN Starts counting Stop GATE CLOSE Stops counting Default NOTE Multiple GATE OPEN GATE CLOSE will accu mulate the results in the counting registers Any other command but GATE OPEN GATE CLOSE will stop the totalizing and reset the counting registers to zero Page 25 Free Run Triggered The counter can work in two different ways 1 Free Run where it starts a new measurement as soon as the previous measurement is finished The first measuring result that is ready after the cou
36. e 21 TING SU DD OM iit eee pU Opp a 4 Time base See MTCXO Time out GPIB eee eee 25 Totalize A SPECICATION aanak vois 35 Trigger level Specification 36 Trigger level A Operating the button 14 Trigger level controls LOGAN OM RE EET EE E 4 Trigger slope PROM GPIB uc utes 25 Triggered mode From GPIB uei eterna 25 Triggering FIOI GPIB uud aqoa ae 25 U WADACKING iiic 5 V Voltage range LOCION OL icto deti eects 3 SEISCIING vers EE 5 W Warning statements 2 age ieg 37 Wiath A GPIB 60d6 its 12 Specification 35 Service Centers Argentina Coasin S A Service Center Virrey del Pino 4071 1430 Capital Federal Buenos Aires Phone 54 1 552 5248 Fax 54 1 555 3321 Viditec S A Service Center Lacarra 234 Buenos Aires CP 1407 Phone 54 1 636 1199 Fax 54 1 636 2185 Australia Philips Scientific amp Industrial Pty Ltd Service Center Block F Centrecourt 34 Waterloo Road North Ryde N S W 2113 Phone 61 2 888 0423 Fax 61 2 888 0440 Philips Scientific amp Industrial Pty Ltd service Center 745 Springvale Road Mulgrave Victoria 3170 Phone 61 3 574 3666 Fax 461 3 574 3636 Austria Fluke Vertriebsges GmbH General Management SudrandstraBe 7 P O Box 10 A 1232 Wien Phone 43 1 61410 30 Fax 43 1 61410 10 Belgium N V Fluke Belgium S A Sales amp Service Dep
37. easurement PM 6669 OPERATORS MANUAL Page 14 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL The TRIGGER One code for TRIGGER LEVEL A control is each trigger LEVELA operated in the same level offset way as the functions See below m control see page 8 Move Trigger Level A SINGLE 029 l3 10s HOLD AUTO TLGA TLO AUT TRIGGER cursor to AUTO a LEVELA B FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION Move Trigger Level A SINGLE 029 is 10s HOLD AUTO in TLO POS EY TRIGGER cursor to LEVEL A B FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION MEASURING TIME Move Trigger Level A SINGLE 029 is 10s HOLD AUTO 7 in TLO SYM TRIGGER cursor to 7 LEVELA FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION MEASURING TIME 1s Move Trigger Level A SINGLE 0 2s 10s HOLD AUTO fn TLO NEG TRIGGER cursor to U L Aa LEVEL A B FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION Each depression of the SINGLE 028 4s 10s HOLD AUTO re in i Not bus BLANK BLANK DIGITS key l controllable DIGITS blanks out one digit samar Hz s
38. ect short output format the number of digits may vary de pending on the measurement result The example below shows a result with five significant digits Measurement result same number of digits as on the display of the counter may vary between 1 and 9 digits plus decimal point No leading zeros are sent Same as for normal output format X XXXXE XS S EXAMPLE Normal operation 1 667E 4 Overflow 9 99999999E 9 PM 6669 OPERATORS MANUAL GPIB INTERFACE OPERATION High Speed Dump The most time consuming part of a measuring cycle is calculating the result The calculations limit the number of possible results second to about 5 even when the Measuring time is short When however High Speed dump is selected all calcula tions are left to the controller instead and the counter can concentrate on measuring at a rate of over 100 measurements second High speed dump cannot be used for voltage measure ments nor for Totalize manually MTCXO compensation is not possible Starting NOTE Always make sure you have input signal and that the input triggers correctly before turning on high speed dump See stopping below If triggered mode is OFF When High speed dump is programmed the counter will immediately start transmitting results so the OUTM 4 command must always be placed at the end of the pro gram message If triggered mode is ON After receiving OUTM 4 the counter waits for bus com
39. en perform the ratio calculation in the controller Make a FREQ A measurement and then calculate the frequency difference in the controller Frequency A Ag RPM A RPM A Period A PER A Totalize A Manually TOTMA See Totalize start stop Pulse width A WIDTH A The counter will also accept PWIDTH A The function cursor on the display of the counter will jump to the selected function Only possible if Input B option PM 9608B is installed Selecting Measuring Time The Measuring time can be set to any value between 10 ms and 10 s or SINGLE measuring Any value be low 10 ms will be interpreted as SINGLE Values above 10 s will be out of range and cause an error The pro gram command is MTIME lt number gt Always enter the Measuring time in seconds The entered value will be trunkated to the nearest 10 ms increment Meas Command Comment Time 0 2s MTIME 0 2 Default 10 ms MTIME 0 01 You will not be able to see the gate indicator blinking if the Measuring time is below 50 ms 7 34567 s MTIME 7 34567 The Measuring time will be 7 34 S 2 ms MTIME 0 002 Out of range Measuring time will be SINGLE SINGLE MTIME O A display time of 50 ms is set so that you can see the Gate indicator 25 s MTIME 25 0 Out of range and error the counter will stop It can indicate programming error by sending an SRQ if selected in the SRQ mask GPIB INTERFACE OPERATION The Measuring time cursor on the display will indic
40. es via GPIB Only Positive or negative Maximum Voltage 350 V DC ACpeak between O and 440 Hz falling to 11 Vrms at 1 MHz Input B option PM 9608B Frequency Range 70 MHz to 1 3 GHz Coupling AC Operating Input Voltage Range 10 mVnus to 12 Vnus 70 MHz to 900 MHz 15 mVRws to 12 Vnus 900 MHz to 1 1 GHz 40 mVnws to 12 Vnus 1 1 to 1 3 GHz SPECIFICATIONS AM Tolerance 98 minimum signal must exceed mini mum operating input voltage requirement Impedance 509 nominal VSWR 2 1 Maximum Voltage Without Damage 12 Vnus over load protection with PIN diodes Ext Reference Input The input automatically detects when a suitable external reference signal is connected The use of an external ref erence signal is indicated on the display Input Frequency 10 MHz 0 1 MHz Coupling AC Sensitivity 500 mVnus Input Impedance approx 3009 at 10 MHz Max Input Voltage 15 Vnus General Information Power Requirements Line Voltage 115 or 230 Vnus 1595 46 to 440 Hz 20 VA incl all options Safety in accordance with IEC publication 1010 1 and CSA 22 2 No 231 Line Interference below VDE 0871 B and MIL STD 461 Battery Unit See PM 9605 option Dimensions and Weight Width 186 mm Height 88 mm Depth 270 mm Weight net 2 1 kg shipping 3 0 kg Cabinet The counter is housed in a metal cabinet to minimize electro magnetic interference and achieve good mechanical stability Page 37 Envi
41. fore being displayed Oscillator Version Uncompen MTCXO sated Stability against Ageing per month 25 10 lt 1 ZUM per year 5 109 5 107 Temperature changes Oto 1 10 2 107 50 C Line voltage changes 10 1 510 1 10 Auxiliary Functions Power On Off Switches counter power on off At power up a self test is made and the counter is set to default settings Default Settings Function FREQA Measuring Time 0 2s Trigger Level Offset AUTO Reset The RESET button has three functions RESET Starts anew measurement The settings are not changed LOCAL Makes the counter go to LOCAL operat ion when in remote operation unless Local Lock Out is programmed START STOP Opens closes the gate in TOTALIZE A or B manual mode Measuring Time A measuring time of 0 2 s 1 s 10 s or SINGLE can be selected NOTE When SINGLE is selected together with PE RIOD or WIDTH the result is a single cycle measurement but SINGLE together with FRE QUENCY or RPM results in a fixed 3 ms Meas uring time Measuring Rate Approx 5 measurements s Display Time Normally the display time equals the set Measuring time When SINGLE is selected a display time of 0 1 seconds is used PM 6669 OPERATORS MANUAL SPECIFICATIONS Disp Hold Store Ao The DISPL HOLD STORE Ag button has two functions DISPL HOLD The result of the current measurement will be frozen on the display Anew measurement start
42. g is selected If triggered mode is selected the counter waits to be trig gered otherwise it proceeds with the measurement You can have the SRQ mask set for SRQ at ready for trigger GPIB INTERFACE OPERATION ing This way the controller knows when it is possible to trigger the counter Measuring result ready indicates that the measure ment and calculation of the result is completed and that the result is present in the output buffer If SRQ for is se lected for this event or Free run is OFF the counting will stop until the controller has read the result Programming error is generated if the counter receives messages with illegal syntax or values out of its range If Programming error is generated the counter will stop measuring It will continue to receive and store correct programming messages and use them when the error status is reset and a new measurement starts Correct the program before resetting the status mes sage Use one of the following bus commands to reset the status byte Go to local GTL Device clear DCL or selective de vice clear SDC Any of the following messages will have the same effect on the counter D FNC MEAC INPA ID or BUS A serial poll will also reset the status message if the SRQ mask is set for SRQ at Programming error Hardware fault is generated when the counter displays the codes described in Error codes in the Operating in structions in this
43. h an IBM General Purpose Interface Bus Adapter instead of the Fluke PM 2201 interface The following set of device parameters is suitable for a PM 6669 with address 10 The device parameters are set with the configuration program IBCONFP see the IBM adapter manual Device Name COUNTER DEVICE PARAMETERS Number D 0 DESCRIPTION NEW VALUE VALID NAME Access Adapter Name GPIBO GPIBx Primary GPIB Address OAH OH to 1E Secondary GPIB Address 00H 60H to 7EH 0H disables Timeout setting T10s T10us to T1000s TNONE disables Ha I EOS Byte OAH OH to FFH or lt character gt Terminate Read on EOS Yes Yes or No Send EOI with EOS byte No Yes or No Use 8 bit Compare on EOS No Yes or No Send EOI w last Byte of Write Yes I I I I Yes or No Example 1 The following program sets up the counter for 10 Period A measurements and presents the average result on the screen 100 DEMO PROGRAM 110 PM6669 AND IBM PC WITH IBM 120 GPIB ADAPTOR AS CONTROLLER 130 CLS CLEAR SCREEN 140 INIT 150 ADNAMES COUNTER 160 CALL IBFIND ADNAMES CNT5 170 SEND SDC 180 CALL IBCLR CNT5 190 SELECT PERIOD A TRIGGED MODE 200 AND MEASURING TIME 1 S 210 WRT PER A TRIG ON MTIME 1 220 CALL IBWRT CNT WRTS 230 INPUT 10 SAMPLES 240 2 0 250 FOR I 1 TO 10 260 CALL IBTRG CNT TRIGGER COUNTER 270 CALL IBRD CNT RD
44. he BLANK DIGITS key once more Page 15 HINTS AND COMMENTS It is often possible for the counter to trigger on unsymmetrical signals even though the symmetrical triggering is selected provided that the sensitivity is high enough This however gives poor noise immunity If you don t know the duty factor of the input signal select Auto If that does not work too low input frequency do as follows Set the sensitivity to max Select Trigger level l Reduce the sensitivity until the gate indicator stops blinking Check if trigger level JU or UL makes the gate indicator start blinking again If it does leave the trigger level in that position otherwise return to trigger level Turn the sensitivity down until the gate indicator stops blinking then up slightly until it starts again The trigger level is now correct This function is used to blank the display of irritating unstable digits PM 6669 OPERATORS MANUAL Page 16 DISPLAY OPERATING INSTRUCTIONS GPIB CODE CONTROL OPERATING THE CONTROL RESET a short LOCAL press is enough for Heset When the remote NH indicator is on a press will cause the counter to ba kar D switch back to LOCAL i e control from the front panel TOTALIZE START STOP one press starts totalizing the next press stops X starts a new measurement GATE OPEN starts and GATE CLOSE stops Totalize MAN
45. he highest output rate is obtained at SINGLE Measur ing time Output Time for Measuring Data Normal operation Approx 10 ms 21 bytes High speed dump Approx 4 ms 15 bytes Response time for addressing Approx 5 us Response Time for Trigger Command GET Normal Operation Approx 10 ms High Speed Dump Approx 2 ms Response Time for Serial Poll Approx 1 5 ms Input Buffer Size 28 bytes Typical Read Time for Programming Data Ap prox 1 ms byte unless input buffer is full Battery Unit PM 9605 The PM 9605 is a rechargeable battery unit for mount ing inside the counter The unit contains a standard 6 V sealed lead acid battery and an automatic battery charger Battery Capacity 20 C Approx 15 Wh Operating Time When Battery Powered 3 hours of continuous operation Recharging Time 7 hours to approx 75 of full capac ity Battery Protection Overcharge protection and auto shut off total discharge protection Temperature Operating O to 40 C Storage 40 to 50 C Weight 0 8 kg Rack Mounting Adapter PM 9606 01 The PM 9606 01 is a 19 wide Rack Mounting Adapter It can host one PM 6662 PM 6665 PM 6666 or PM 6669 Counter only Rack Mounting Adapter PM 9606 02 The PM 9606 02 is a 19 wide Rack Mounting Adapter It can host one PM 6662 PM 6665 PM 6666 or PM 6669 Counter together with a second instrument PM 6669 OPERATORS MANUAL Page 40 That second instrument can be a Philips
46. hese two points You will have a stable reading If the sensitivity is too high the Frequency Counter will be triggered by noise and interference instead of by the signal The filter can also be used to suppress HF interference on signals with higher frequencies than 50 kHz but then the sensitivity of the input will be reduced NOTE Never use the filter when measuring TIME A B since the filter delays the signal on Input A Use external reference when the measurement requires ultra high stability The Frequency Counter must still have the internal time base even if an external reference frequency is used If single is selected the EXT REF indicator on the display is not switched on until after the first measurement PM 6669 OPERATORS MANUAL Page 20 Battery Unit Operation When a battery unit is installed the counter can operate for 3 hours without mains supply The display starts blink ing shortly before the battery is discharged The counter charges the battery automatically when con nected to the mains no matter how the Power switch is set Charging a discharged battery to 75 of full capac ity will take 7 hours and to full capacity 24 hours If the counter is connected to the mains and switched on it will not switch to battery operation if you discon nect the mains You must first switch the counter OFF with the power switch then ON again before the battery unit Supplies the counter
47. icate which options are fitted in your Frequency Counter INCLUDED OPTIONS PM9604 PM 9608B O PM9605 O PM9607 Figure 3 Options Label on Rear Panel Voltage Range Selection Set the Frequency Counter to the local line voltage before connecting it As delivered the Frequency Counter may be set to either 115 V or 230 V The setting is indicated on the voltage range selector on the rear panel SUPPORTED a IEEE 488 INTERFACE TALK ONLY FUNCTIONS ON ADDRESS SH1 AH1 168421 T5 dd dd SR1 RL1 Ka a 2 n u nu o INCLUDED OPTIONS EXT REF INPUT VOLTAGE PM9604 O PM 9608B SELECTOR O PM9606 O O PM9607 O 10MHz 0 5 15Vrms THERMAL FUSE IN MAINS TRANSFORMER Figure 4 Location of Voltage Range Selector If the voltage range setting is incorrect set the selector in accordance with the local voltage before connecting the power cable to the line Grounding The Frequency Counter is connected to ground via a sealed three core power cable which must be plugged into a socket outlet with a protective ground terminal No other grounding is permitted for this Frequency Counter Extension cables must always have a protective ground conductor PM 6669 OPERATORS MANUAL Page 6 WARNING Never interrupt the protective ground ing intentionally Any interruption of the protective ground connection inside or out side
48. ing logic A longer Measuring time gives higher resolution readouts with more digits displayed The time the gate is open is not exactly the preset Measuring time because the Frequency Counter syn chronizes the measurement with the input signal in or der to measure complete periods If the period of the input signal is longer than the set Measuring time the main gate does not close again until the period is completed For PER A and WIDTH exactly one period or one time interval is measured The minimum result possi ble is 100 ns The display time will be 100 ms When set to SINGLE FREQ A and RPM A the Measuring time is one cycle of the input signal or 3 ms whichever is longest When set to SINGLE and FREQ B the Measuring time is 3 ms A Frequency A measurement will result in 6 7 digits on the display A Frequency A measurement will result in 7 8 digits on the display A Frequency A measurement will result in 8 9 digits on the display Page 13 HINTS AND COMMENTS If you are interested in the negative pulse width instead first measure the period and make a note of the result then measure the pulse width and substract it from the period reading If you wish to do one measurement instead of repetitive measurements see DISPL HOLD The input frequency is limited to 16 MHz for FREQ A PER A and RPM A If external reference is used the EXT REF indicator will not be switched on until after the first m
49. inute on Input A PER A Period on Input A WIDTH A Pulse width on Input A PWIDTHA Pulse width on Input A TOTM A Totalize A start stop by GATE OPEN CLOSED on the bus FNC Output the current function setting Input Setting Commands TLO AUT Auto trigger level TLO POS Positive trigger level offset JU TLO SYM No trigger level offset U TLO NEG Negative trigger level offset Il TRGSLP POS Triggering on positive slope TRGSLP NEG Triggering on negative slope INPA Output the current Input A settings Measurement Control Commands GATE OPEN Starts the totalizing in TOTM A GATE CLOSE Stops totalizing MTIME num Set Measuring time num 0 01 10 s 0 SINGLE FRUN ON Selects Free Run FRUN OFF Selects Triggered mode TRIG OFF Selects Free Run TRIG ON Selects Triggered mode TOUT num Sets Time Out num 0 1 25 5 s 0 Time Out OFF MEAC Output the current Measurement control settings Bus Related Commands OUTM number High Output MTCXO number speed format compen dump sation 0 OFF NORMAL ON 1 OFF SHORT ON 2 OFF NORMAL OFF 3 OFF SHORT OFF 4 ON FOR HIGH OFF SPEED DUMP MSR num Sets SRQ mask see Service request EOI ON Selects EOI mode ON EOI OFF Selects EOI mode OFF SPR num Select output separator see Output separators X Device trigger starts a new measurement D Device clear returns to default settings BUS Output the current bus related
50. itched off more than three hours you can calibreate it directly PM 6669 OPERATORS MANUAL INSTALLATION Removing the Cover WARNING When you remove the cover you will ex pose live parts and accessible terminals which can be dangerous to life Loosen the two screws NOSES ST f using a Pozidrive No 1 screwdriver ll Figure 5 Loosen These Screws to Remove Cover Make sure that the power cable is disconnected WARNING Although the power switch is in the off position the line voltage is present on the printed circuit board Loosen the two screws in the rear feet Grip around the front panel and pull the Frequency Counter out of the cover Calibration Procedure Remove the cover from the counter Allow the MTCXO to adapt the new ambient tempera ture See Preparations Connect the 10 MHz reference to Input A Switch ON the counter Adjust the sensitivity control so that the counter counts properly Hold down the CALIB button on the main printed circuit board in the counter and press the Reset button INSTALLATION Page 7 Wait about 20 seconds until the display shows 10 0000000 MHz Now the oscillator is calibrated Switch OFF the counter and disconnect the 10 MHz ref CALIB button BA Fit the cover Figure 6 Location of the CALIB Button PM 6669 OPERATORS MANUAL Page 8 OPERATING INSTRUCTIONS OPERATING INST
51. itches are located to the right of the interface connector The OFF position means 0 and the ON position means 1 PM 6669 OPERATORS MANUAL GPIB INTERFACE OPERATION Ad Switch Ad Switch Ad Switch dress settings dress settings dress settings 0 00000 10 01010 20 10100 1 00001 11 01011 21 10101 2 00010 12 01100 22 10110 3 00011 13 01101 23 10111 4 00100 14 01110 24 11000 5 00101 15 01111 25 11001 6 00110 16 10000 26 11010 i 00111 17 10001 27 11011 8 01000 18 10010 28 11100 9 01001 19 10011 29 11101 30 11110 Factory setting NOTE 31 is the bus command for Untalk and should not be used If 31 is selected the counter will work as if address O is selected Talk Only The leftmost switch in the address switch block is the TALK ONLY switch If you set it to 1 the counter will output measurement results on the bus continuously It will not react to any incoming commands This setting may only be used if the counter is con nected to a Listen only device such as a printer Set the switch to 0 when you want normal bus communication Talk only is set to 0 on delivery The counter is now ready for bus control Checking the Communication To check if the counter and the controller can communi cate address the counter and execute the following se quence The programming example is for an HP 85 controller Type on Controller This Should Happen The remote indicator sho
52. l Valle Mexico C P 03100 Phone 52 5 682 8040 Fax 52 5 682 8040 Ext 404 New Zealand Philips Scientific amp Industrial Pty Ltd Service Center Private Bag 41904 St Lukes 2 Wagener Place Mt Albert Auckland 3 Phone 64 9 849 4160 Fax 64 9 849 7814 Norway Fluke Norge A S Customer Support Services P O Box 6054 Etterstad N 0601 Oslo Phone 47 22 65 3400 Fax 47 22 65 3407 Pakistan Philips Electrical Industries Of Pakistan Ltd Islamic Chamber of Commerce St 2 A Block 9 KDA Scheme 5 Clifton Karachi 75600 Phone 92 21 587 4641 Fax 492 21 577 035 Peru Importaciones amp Representaciones Service Center Jr Pumacahua 955 Lima 11 Phone 51 14 235099 Fax 51 14 310707 Philippines Spark Electronics Corporation P O Box 610 Greenhills Metro Manila 1502 Phone 63 2 700 621 Fax 463 2 700 709 Poland Electronic Instrument Service E 1 S Philips Consumer Service UL Malechowska 6 60 188 Poznan Phone 48 6 1 681998 Fax 48 61 682256 Portugal Fluke Ib rica S L Sales amp Services Department Campo Grande 35 7ob 1700 Lisboa Phone 351 1 795 1712 Fax 351 1 795 1713 Romania RONEXPRIM S R L Customer Support Services Str Transilvaniei Nr 24 70778 Bucharest Phone 40 1 6143597 Fax 40 1 6594468 Russia C 1 S Infomedia UL Petrovsko Razumovsky Proezd 29 103287 Moscow Phone 7 095 2123833 Fax 7 095 2123838 Saudi Arabia A Rajab amp
53. lable FILTER 50kHz Jo the FILTER and relase to switch it off EXT REF INPUT 6 10MHz 0 5 15Vrms Connect an external SNGLE 029 15 sibs HOLD RUTOD ats Ta Not bus 10 MHz frequency controllable source to the BNC connector on the rear panel of the Frequency J Counter marked EXT FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A A0 A A0 A A A An REF REF INPUT FUNCTION PM 6669 OPERATORS MANUAL OPERATING INSTRUCTIONS FUNCTION AND RANGE For frequency period and ratio measurements Select AC coupling and set the sensitivity so that the hysteresis band of the Frequency Counter is about half the amplitude of the signal For time measurements Select DC coupling and set the trigger level to the de sired level using the 1 V divistion scale on the front panel The filter works on Input A where it suppresses sig nals with higher frequencies than 50 kHz Filter suppression 40 dB at 1 MHz The Frequency Counter automatically detects if a suit able signal is connected to the EXT REF Input con necior Suitable signal 10 0 1 MHz 0 5 to 15 Vrms Sine wave Page 19 HINTS AND COMMENTS Set the sensitivity knob fully counter clockwise 2 Turn it until the input triggers 3 Continue turning to the 20 mVrms position or to the position where the display turns unstable due to noise 4 Set the knob to the position inbetween t
54. le battery for field C External reference input BNC connector MES D Voltage range selector A rack mount kit and a carrying case are also available as E Power inlet socket accessories F GPIB interface connector optional G GPIB address selector option SUPPORTED IEEE 4 8 INTERFACE TALK ONLY FUNCTIONS SH1 AH1 T5 L4 SR1 RL1 DC1 DT1 E2 etus O PM9605 O O PM9607 O INCLUDED OPTIONS EXT REF INPUT ONCE Qo PM9604 O PM 9608B SELECTOR Figure 1 Rear View PM 6669 OPERATORS MANUAL Page 4 PRODUCT PRESENTATION PM 66 9 UNIVERSAL FREQUENTY COUNTER 160MH 1 3GHZ MEASURING TIME DISPL TRIGS SINGLE 0 2s 1s 0s HOLD AUTO ny an INPUT A INPUT B zULTER 50kE OPTION FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A ASL REF EH 200mVrms A i ON RESET MEAS FUNCTION DISPL BLANK TRIGGER Wi STANDBY LOCAL TIME HOLD DIGITS LEVELA OHz 160MHz HOME pagba a mam J J A ma SY TOT ALIZE A STAI T STOP MAX 350Vp MAX 12Vrms Figure 2 Front View Front View P Measuring time selector button H Large LCD display R Function selector button J Input A BNC connector S Display hold button Freezes the display The but ton is also used for storing Ao K d control with dual range push in pull out T Blank digits button Blanks out one digit for each ides depression of the button from the right to the
55. list GPIB program 23 Checking GPIB communication 22 Control function 21 Controller Connecting GPIB 22 Controls operation AAAH 8 Coupling SIT en 18 Cover remowval eene 6 Crystal oscillator Specification 37 D DC Selecting i is 18 Default settings Specification 38 Delimiters See Separators INDEX INDEX Device clear s Device Trigger Dimensions eeeeseee Display Specification Display hold Operating the button SDecIfICallOIzs aaa Display time Specification anin Display hold button LOCAMO Miec ETT E Earthing See Grounding Environmental specification EOI mode See Output separator EITODIGOCOS trinaa a 9 External reference input Connection 6 Description of function Location of connector Specification F Filter Specification Filter On Off Selection eeesss Free run From GPIB FREQ A AO GPIB COE icd creta etos Frequency A FIOM GPIB LS GPIB COGO Gaertn btts Seleclilig aren teneis Specification
56. manual Time Out is generated when the set time out period has elepsed Possible Status Messages Normal Measurement The status byte changes as follows during a normal measurement 0 2 6 22 30 14 15 0 ses Important Deci Binary bits X mal 76543210 don t care Comment 0 00000000 Preparing a measurement or High speed dump or Volt measurements in progress 2 00000010 XXOXXX1X Preparations ready If Free run OFF Page 27 Important Deci Binary bits X mal 76543210 don t care Comment 6 00000110 XXOXX1XX Measuring start enable 22 00010110 XXO1XXXX Main Gate open 30 00011110 XXOX1XXX Measuring stop enable 14 00001110 Calculating the measuring result 15 00001111 XXOXXXX1 Measuring result ready Error Conditions Important Deci Binary bits X mal 76543210 don t care Comment 33 00100001 XX1XXXX1 Programming error 34 00100010 XX1XXX1X Hardware fault 36 00100100 XX1XX1XX Time out f Service request SRQ is enabled for an event the decimal value of the status message for that event will be increased by 64 The reason for this is that bit 6 will be set to one at the same time as the bit indicating the event Output Mode Setting the output mode selects the format in which the counter will output measuring results to the controller Select output mode by sending OUTM number where number is a decimal value between 0 and 4 depend ing on the selected output mode
57. ncy Counter cece 8 PC TAMU OUNS ense aa a A MM DL 36 Battery Aa RR aaa NU Aa nome eae een eee cece 20 Input specifications E 36 BIO CO CCS us anG Ak Bas baa ucc oom det uda naan 20 General INFOrMAtION cccccccccccccucccccaccccecccceccccacceceece 37 Anila FUNCIONS iocari aree NT 38 GPIB INTERFACE OPERATION eene 21 Optional ACCeSSOFIGS a5 oder nA e Dis 38 ATON ERR REPE 21 Ordering Information ccc cccescccssessecececsesesseseseeseseeseseee 40 What Can Do Using the Bus 21 Connecting the Controller sss 22 APPENDDCT Canaan aaa naaa span aasa 41 Giving the Counter an Address esee 22 Checking the Sensitivity Of Counters ss 41 Checking the Communication 22 Two Ways of Programming sssssse 23 INDEX er 43 OVITA AA 23 4822 872 20021 5 12 April 1995 PM 6669 OPERATORS MANUAL Page 2 SAFETY SAFETY Introduction Read this page carefully before you install and use the PM 6669 Frequency Counter This Frequency Counter has been designed and tested in accordance with IEC publication 1010 1 and CSA 22 2 No 231 and has been supplied in a safe condition The user of this instrument must have the required knowledge of PM 6669 This knowledge can be gained by thoroughly studying this manual Safety Precautions Use generally accepted s
58. ncy measurement of the signal at In put B Range 70 to 1300 MHz PM 9608B The counter divides the frequency on Input A by a constant Ao that is stored in the counter in the follow ing way 1 Connect a signal with the frequency to be stored as Ao to Input A 2 Select FREQ A 3 Depress the DISPL HOLD key and hold it de pressed until the DISPL HOLD indicator is switched off again Now Ao is stored 4 Select FREQ A A 5 Connect the frequency to be measured to Input A The counter substracts a constant Ao from the fre quency at Input A You can read about how to store Ao in the description for FREQ A Ao The frequency on Input A is multiplied by 60 and dis played as Revolutions Per Minute Range 6 RPM to 720 000 000 RPM When you select SINGLE the Frequency Counter measures one period the range is 100 ns to 200 000 000 s about 6 years and four months When you select 0 2 1 and 10 s Measuring time the Frequency Counter divides the input frequency by 10 and measures the average period for the No of cy cles in that time Range 8 ns to 1 s The Frequency Counter counts the total number of pulses fed to Input A You start and stop the totalizing with the TOTALIZE START STOP key RESET LO CAL If you keep this key depressed for more than one second the total sum will be reset Range 0 to 1 10 pulses Page 11 HINTS AND COMMENTS The cursor does not stop at FREQ B if no Input B HF i
59. ng in a program made using bus learn or add functions which are not selectable from the front panel these program messages can easily be edited in the controller NOTE MEAC and BUS result in a response sent as two lines each terminated by the selected separator NOTE The counter will stop measuring until all lines of the response have been read or the response has been terminated NOTE The query command must always be the last command in a program message Terminating a Response It is not necessary to read all output lines Any program message will terminate the response PM 6669 OPERATORS MANUAL GPIB INTERFACE OPERATION Programming Data Out Any one of the queries used for Bus Learn can be used to ask the counter about its current setting see Bus Learn above What Happens When I Switch to Local Switching to LOCAL causes the counter to adapt the set tings indicated on the display see How to select func tion This means that the counter will never have set tings in LOCAL which are not possible to set via the front panel When switching to remote again the LOCAL setting will remain Bus functions like SRQ mask output separator EOI etc will not be altered by switching to LOCAL and back again GPIB INTERFACE OPERATION Page 31 Summary of Bus Commands Function Selecting Commands FREQ A Frequency measurement on Input A FREQ B Frequency measurement on Input B RPM A Revolutions m
60. nput is installed If you select this function without storing Ao Frequency A will be displayed This function is convenient when an oscillator is to be tuned to the frequency of a reference oscillator It is much easier to adjust until the display shows 1 0000000 than 7 1223678 If you select this function without storing AO Frequency A will be displayed This function can e g be used in a radio to display the received frequency Set the intermediate frequency as the constant Ao Select FREQ A Ao and measure the frequency of the local oscillator and the display will show the received frequency Use SINGLE when the input frequency is low This shortens the measuring time considerably since one cycle is measured instead of 10 k on the display indicates kilo pulses 1000 and M in dicates Mega pulses 1 000 000 The Measuring time indicator is switched off in TOT A MAN PM 6669 OPERATORS MANUAL Page 12 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL Move function cursor to SINGLE 029 ie iog HOLD AUTO enr OANA el i WIDTH A or FUNCTION WIDTH A l PWIDTH A s FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION MEAS TIME is operated MTIME lt
61. nter receives a read command will be sent to the controller When the result has been read the output buffer is reset to zero until a new re sult is ready One and the same measuring re sult can only be read once 2 Triggered where the counter waits for trigger com mand GET or X from the controller before it starts a measurement When the measurement is completed the counter will wait until the con troller reads the measuring results then the out put buffer is reset The function is the same as when Displ Hold is selected from the front panel and you start a new measurement by pressing the reset button Free Run Command Comment Off FRUN OFF This function is sometimes called Triggered Mode so the TRIG ON command will also result in the same function On FRUN ON TRIG OFF gives the same result Default Free Run ON or OFF will not be indicated on the dis play When the counter switches to LOCAL Free Run will always be ON but when the counter switches back to remote it will return to its previously programmed set tings Time Out When Free Run is switched off it is possible to set a time limit time out between the start of a measurement and the time when a result is expected to be ready If no result is achieved before the set time is out the counter can output a Service Request SRQ Time Out must be selected in the SRQ mask see Service Request The programming command is TOUT lt number gt The timeout can
62. num gt pagasa in the same way as the where lt num gt func tions control see is the time in m page 8 seconds Range 10 ms to 10 s 0 Single Move the measuring SINGLE 028 1s 10s HOLD AUTO en MTIME 0 H N MEAS time cursor to SINGLE a nnnn m 1 LILELILI J FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION Move the measuring SINGLE 029 is 10s HOLD AUTO en MTIME 0 2 H N MEAS time cursor to 0 2 s a TIME qa lt a A A say m kHz b SISI NAIA NA NT Oa LILILILILILI d FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION Move the measuring SINGLE 029 Sie 10s HOLD AUTO in MTIME 1 1 5 ae time cursor to 1 s a SENA SENA SENA SE Ct Ct HY kHz SINAINAINAINANI NT LOLOL Le J FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF FUNCTION Move the measuring SINGLE 029 is 10s HOLD auto in MTIME 10 MEAS time cursor to 10s TIME Na Na D jl jl E M kHz N AHAHAHAH Hi FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT A B A Ao A Ao A A A A REF a Wey L Wy Wy 1 Wy ww I I I i I L FUNCTION PM 6669 OPERATORS MANUAL OPERATING INSTRUCTIONS FUNCTION AND RANGE The counter measures the positive pulse width of the signal on Input A Range 100 ns to 200 000 000 s The set Measuring time controls the time during which the main gate is opened allowing pulses to en ter the count
63. or 3 8 Measuring stop enable 2 4 Measuring start enable 1 2 Ready for triggering 0 1 Measuring result ready If SRQ for Measuring result ready is selected the counter will stop and wait until the controller fetches the result before a new measurement can start Write down the binary word for the required SRQ then convert it to a decimal value and insert the value as numbers EXAMPLE If you want SRQ to be sent when the time out elapses when the counter is ready for triggering and when the result is ready the binary word required is 01000011 which is decimal 67 see table below Bit Value if Example the bitis 1 Binary Decimal word value 7 128 0 0 6 64 1 64 Time Out 9 392 0 0 4 16 0 0 3 8 0 0 2 4 0 0 1 2 1 2 Ready to trigger O0 1 1 1 Meas result ready 67 Send MSR 67 to the counter PM 6669 OPERATORS MANUAL GPIB INTERFACE OPERATION Status Byte The counter sends its status byte to the controller on a serial poll The bits in the status byte reflects different events or conditions in the counter There are two types of status bits A conditional bit indicates the current condition of what its monitoring all the time An event bit indicate that an event has occurred When the event occurs the bit is set to 1 It is not reset to O un tila new measurement starts The different bits indicate the following information Bit Function Always 0 1 SRQ has been sent otherwise O
64. r 10 Period A meas urements and presents the average result on the screen 100 DEMO PROGRAM NO 1 110 PM6669 AND IBM PC 120 WITH PM2201 GPIB INTERFACE 130 AS CONTROLLER 140 CLS CLEAR SCREEN 150 AD 7 ADAPTOR NUMBER 160 ADDR 710 COUNTER ADDRESS 170 SC 1 SYSTEM CONTROLLER 180 RESS SPACES 25 RESULT 190 ACT 0 READ CHARACTERS IN RESS 200 MAX 24 MAX CHARACTERS TO READ IN RESS 210 CALL IOINIT AD SC INIT INTERFACE 220 TIME 10 TIMEOUT AFTER 10 SECONDS 230 CALL IOTIMEOUT AD TIME SET TIMEOUT 240 CALL IOCLEAR ADDR SEND SDC 250 SELECT PERIOD A TRIGGERED MODE 260 AND 1 S MEASURING TIME 270 SENDS PER A TRIG ON MTIME 1 280 LENGTH LEN SENDS 290 CALL IOOUTPUTS ADDR SENDS LENGTH 300 Z 0 310 INPUT 10 SAMPLES 320 FOR i 1 TO 10 330 CALL IOTRIGGER ADDR TRIGGER COUNTER 340 CALL IOENTERS ADDR RESS MAX ACT READ RESULT 350 Z Z VAL MIDS RESS 8 13 360 NEXT I 370 PRINT AVERAGE Z 10 S 380 CALL IOLOCAL ADDR GO TO LOCAL 390 END Example of a result AVERAGE OK 9 98004E 06 S Example 2 This program example illustrates the program data out feature of PM 6669 By asking a set of queries the counter responds with its current setup The output for mat of these answers to the queries is identical to the programming command format The answers can be stored and used later for reprogramming bus learn 100 DEMO PROGRAM 110 PM6669 AND IBM
65. ronmental Conditions Temperature Operating OC to 50 C Storing 40 C to 70 C Altitude Operating 5000 m 53 3 kN m Storing 15000 m 15 2 kN m Humidity Operating 10 to 90 RH no condensation Storing 5 to 95 RH Vibration Test According to IEC 68Fc Bump Test According to IEC 68Eb Handling Test According to IEC 68Ec Display Read Out 9 digit LCD display with unit indication Unit Indication M k m t and n MHz kHz Hz mHz ks s ms us ns GATE Indicator measuring Indicates that the counter is busy REMOTE Indicator Indicates when control over the counter is taken over by an installed GPIB interface PM 9604 Cursor Indicates selected measuring function selected Measuring time input triggering display hold and whether an external reference frequency is in use Time Base Crystal Oscillator Choice of Uncompensated crystal oscillator order no PM 6669 1 MTOXO i e Mathematically Temperature Compen sated Crystal Oscillator order no PM 6669 3 The MTCXO can be ordered separately for later upgrading of the counter option PM 9607 MTCXO Working Principle The temperature of the crystal is measured The built in microprocessor calcu lates the frequency deviation for that particular tempera ture from a stored table The measuring result is mathe PM 6669 OPERATORS MANUAL Page 38 matically corrected for the time base frequency tempera ture error be
66. s Colonial Way Watford Hertfordshire WD2 4TT Phone 44 1923 240511 Fax 44 1923 225067 E Mail kgarner uk fluke nl Uruguay Coasin Uruguaya S A Service Center Casilla de Correo 1400 Libertad 2529 Montevideo Phone 598 2 789015 Fax 598 2 492199 Venezuela Coasin C A Service Center Calle 9 Con Calle 4 Edif Edinurbi Apartado de Correos NR 70 136 Los Ruices Caracas 1070 A Phone 58 2 241 0309 Fax 58 2 241 1939 Vietnam Schmidt Vietnam Co Ltd 6 FI Pedalogical College Bldg Dich Vong KM 8 Highway 32 Tu Liem Hanoi Phone 84 4 346186 Fax 484 4 346 188 Countries not listed For Eastern Europe And Middle East Export Sales Science Park Eindhoven 5110 5692 EC Son The Netherlands Phone 31 40 644265 Fax 31 40 644260 All other countries Fluke Corporation P O Box 9090 Mail Stop 268C Everett WA 98206 9090
67. s when RESET button is pressed STORE Ag This function is active in FREQ A measure ments only When the button is pressed for gt 1 s the re sult on the display is stored as the constant Ao which is used for the calculation of frequency difference A Ao and ratio A Ao Blank Digits This function blanks any number of least significant dig its on the display in order to hide unstable digits on the display Optional Accessories GPIB Interface PM 9604 Mounting Inside counter cabinet Interface Functions DC1 DT1 E2 SH1 AH1 T5 L4 SR1 RL1 Address Setting Switch selectable at rear panel be tween 0 and 30 Factory preset at 10 Programmable Device Functions Measuring functions Measuring time Trigger slope Manual Totalize gate control Output separator selection Device clear Device trigger High speed dump MTCXO on off Short output format Free run Triggered measurements Set SRQ mask Program data out queries Device identity query Programming Code Format 7 bit ISO code ASCII characters Both upper and lower case characters are accepted Input Separator The counter accepts the following characters as separators ETX ETB CR LF space comma colon 5 semicolon SPECIFICATIONS Output Data Separator Default separator at power on is LF The separator can be programmed to be any non printable ASCII code with decimal equivalent 0 31 ex cept 27 ESC In addition the combination
68. separators terminate messages from the counter to the controller The separator needed is different for dif ferent controllers see the Operators Manual for your controller At power on the output separator of the counter is line feed LF 10 decimal The output separator can be changed by sending SPR numbers to the counter number is the decimal value of the ISO ASCII code for the desired separator It can be 0 26 28 31 ESC code 27 is not accepted Only one lt number gt can be entered as separator If you want the combination of CR LF 13dec 10dec it is se lected by SPR 255 EXAMPLE SPR 13 changes the output separator to CR SPR 255 changes the output separator to CR LF The counter can signal EOI together with the last output separator in responses and output data EOI ON switches on the function EOI OFF switches it off Default setting is EOI OFF The selected separator and EOI will not be altered by LOCAL from the front panel nor by LOCAL or Device clear from the bus PM 6669 OPERATORS MANUAL GPIB INTERFACE OPERATION How to Select Function Standard Functions Functions are selected by sending the appropriate func tion command to the counter e g FREQ A The space between FREQ and A indicates the input separator that you always must insert Function Command Comment Frequency A FREQA Default Frequency FREQ B Bx Frequency A Ag Make a FREQ A measurement and th
69. settings ID Output identity and which options are installed x This command must be placed at the end of a pro gram message PM 6669 OPERATORS MANUAL Page 32 Programming Examples For HP 85 Controller This program illustrate high measuring rate obtained with High speed dump The actual measuring function is selected by the user in Local mode When the program runs two beep s can be heard from the HP 85 Between these beep s the counter performs 500 measurements and the result of each measurement is transferred from the counter to the HP 85 The output rate is approximately 125 readings second in this example 10 DEMO PROGRAM DUMP MODE 20 PM6669 WITH HP85 AS 30 CONTROLLER 40 DUMP MODE WITH FREE RUN ON 50 CLEAR 60 DIM Z 7508 BUFFER FOR 500 MEASUREMENTS WITH 15 BYTES 70 DIM B 14 80 IOBUFFER Z 90 LOCAL 710 100 DISP SELECT FUNCTION IN LOCAL MODE 110 DISP MEASURING TIME WILL BE 120 DISP SELECTED BY HP85 SINGLE 130 DISP ANSWER Y WHEN READY TO START 140 INPUT AS 150 IF A Y THEN 130 160 DISP MAKE 500 MEASUREMENTS 170 OUTPUT 710 TRIG OFF MTIME 0 OUTM 4 180 BEEP 190 E TIME 200 TRANSFER 710 TO Z FHS COUNT 7500 210 F TIME 220 TIME 230 DISP READY ELAPSED TIME F E s 240 SHOW 5 RESULTS 250 DISP FIRST 5 RESULTS 260 FOR K 1 TO 5 270 ENTER Z B 280 GET FORMULA CHARACTER 290 FS BS 1 1 300 GET MULTIPLYER CHARACTER 310 MS BS 2
70. t data indicates which for mula you must use If Fz Use this formula C Reg 2 107 Reg 1 F Reg 3 G Reg 2 Reg 1 Reg 1 107 Reg 2 J Reg 3 107 K Reg 2 107 Reg 1 Multiplier The second letter M in the output data represents a multiplier which you must multiply the results by before presenting it If M Multiply results by H 60 L 256 N 0 1 O 10 P 1 EXAMPLE 1 The following HP 85 program sets up a High Speed dump Single period measurement OUTPUT 710 PER A MTIME 0 ENTER 710 A AS PER 000001 667E 4 OUTPUT 710 OUTM 4 ENTER 710 A Page 29 AS JP000000000683 J means that you must use formula J which is Reg 3 107 000000000683 is the hex contents of register 3 The reg ister contents must be converted to a decimal number and entered in the formula 683Hex 6 16 8 16 3 1667 decimal The result is 1667 10 which you must multiply by Mul tiplier P which is 1 to get the measuring result 1667 10 1 1 667 10 s 166 7 us EXAMPLE 2 The following HP 85 program sets up a High Speed dump Frequency A measurement with 1 s Measuring time OUTPUT 710 FREQ A MTIME 1 ENTER 710 A AS FREQ 006 000006E3 OUTPUT 710 0UTM 4 ENTER 710 A AS CO98555B000257 Reg 2 10 Reg 1 98555B is the hex contents of register 1 and 000257 is the hex contents of register 2 Both register contents must be converted to decimal numbers and put into the form
71. tance to know how sensitivity is measured Recommended Instruments Signal source with a 50Q output impedance gt 350 MHz oscilloscope with a 50Q input impedance BNC T piece Two BNC cables one short and one long High Impedance Inputs 1 MQ Counter under test Oscilloscope 2350 MHz Signal source 50 ohm 7 directly on counter Attenuator if required Shortest cable possible Preparations Connect the instruments as illustrated in the figure above Set the counter to maximum sensitivity Method 1 Adjust the amplitude of the signal source to the mini mum level accepted by the counter Read the amplitude on the oscilloscope Check that the reading is the same as or less than the sensitivity level in the counter specifications Method 2 Adjust the amplitude of the signal source until the oscil loscope indicates the sensitivity limit in the counter specifications Check that the counter is operating correctly Low Impedance Inputs 502 If you have a calibrated signal source Adjust the signal source to the sensitivity limit of the counter PM 6669 OPERATORS MANUAL Page 42 Connect it directly to the input of the counter Check that the counter is operating correctly If you dont have a calibrated signal source Use either of the following methods Method 1 Connect the output of
72. tarting from the right uw o TEN CM Least Sig nificant Digit J When all digits are FREQ FREQ FREQ FREQ RPM PER TOT WIDTH EXT blanked out the next FUNCTION depression removes the blanking PM 6669 OPERATORS MANUAL OPERATING INSTRUCTIONS FUNCTION AND RANGE The normal trigger level of the AC coupled Input A is 0 V This is ideal for symmetrical signals like sine waves since their average DC component is 50 of Vp p Non symmetrical signals however might fail to trigger if the trigger level is O V Therefore there are three trigger level settings available one for small duty fac tors one for symmetrical wave forms and one for large duty factors When set to Auto the counter first tries the trigger level for symmetrical signals If that does not work it tries the other settings Auto does not work if TOT A is selected Range Auto works with input frequencies from 100 Hz and up Use this setting if the duty factor is below 25 A positive offset voltage is added to the trigger level Use this setting if the duty factor is between 25 and 75 The trigger level is 0 V Use this setting if the duty factor is below 75 A negative offset voltage is added to the trigger level Each digit that is blanked out is removed and re placed by a The numerical value on the display is not rounded off The blanking is cleared by reset changing settings or when all digits are blanked and you press t
73. the instrument or disconnection of the protective ground terminal is likely to make the instrument dangerous Connecting External Reference If you wish to use an external 10 MHz reference frequency source connect it via a BNC cable to the EXT REF INPUT on the rear panel of the Frequency Counter When the Frequency Counter starts measuring it automat ically detects the external reference and begins to use it The EXT REF indicator on the display is switched on Installing Options Introduction The options ordered at the same time as the Frequency Counter are normally factory installed Other options can be fitted when needed The options fit inside the Frequency Counter but not all at the same time The HF input the high stability oscillator and either of the GPIB interface or the Battery unit can be installed in one and the same Frequency Counter Calibrating the MTCXO The MTCXO Time base can easily be recalibrated to any 10 MHz reference To maintain the accuracy of the MTCXO use a reference with an accuracy of 3x108 The PM 9691 oven enclosed oscillator used in Fluke counters version 5 meet this requirement if calibrated Preparations If you remove the cover when counter has been switched on the temperature of the MTCXO will rapidly drop about 10 C Since the MTCXO must have a stable temperature when calibrated you must wait an hour between removing the cover and calibrating If the counter has been sw
74. the signal source directly to the input of the counter Turn off AUTO and Set the counter to maximum sensi tivity if adjustable Adjust the amplitude of the signal source to the mini mum level accepted by the counter Disconnect the cable from the counter and connect it to the oscilloscope Read the amplitude on the oscilloscope PM 6669 OPERATORS MANUAL APPENDIX 1 Check that the reading is the same as or less than the sensitivity level in the counter specifications Method 2 Connect the signal source to the oscilloscope Adjust the output amplitude of the signal source until the oscilloscope indicates the sensitivity limit in the counter specifications Disconnect the cable from the oscilloscope and con nect it to the counter Set the counter to maximum sensitivity if adjustable Check that the counter is operating correctly These procedures ensure unambiguous measurements of the signal voltage at the input of the counter A Abnormal bit See Status byte AC Selects es teo cette des 18 Accessories eeeeeenne 40 Addres Selaa 22 B Battery unit Operation 20 Preventive maintenance 20 Specification 39 Storage Ante dictata iin deed 20 Blank digits button LOCANON NONEM 4 Bus commands Summary ul 31 BUSOG ee oho he cess 22 Bus learn GPIB akma ooo 30 C Caution statements 2 Check
75. ula Formula C is 2 165 5 x 16 7 107 E 9 16 8 16 5 16 5 16 5 16411 600 0006209 This number is multiplied by multiplier O to get the measuring result 600 0006209 10 6000 006209 6 000006209 10 Hz How Many Digits are Significant Select the formula for LSD displayed in the Specifica tions There are different formulas for different measure ments Frequency 2 5x10 FREQ LSDdisplayed d Measuring time 2 5110 7 x T LSDdisplayed EU PME 0 0015 LSD 0 001 Hz The result is 6 000006 10 Hz PM 6669 OPERATORS MANUAL Page 30 Bus Learn Set the counter to LOCAL and select the functions you want from the front panel required set the counter to Remote and program spe cial bus functions from the controller Check that the counter controller performs the intended functions f it does send the five queries from the controller to the counter and store the responses in the controller for later use These are the five queries Max No of Char Query Response acters FNC Functions setting e g FREQ A 9 MEAC Measurement control MTIME lt number gt FRUN ON 20 TOUT number 9 INPA Input A settings TRGSLP POS 10 BUS Bus interface commands MSR znumbers OUTM number 16 EOI OFF SPR number 15 As you can see the responses are the same commands as you use for normal programming So if you have to change anythi
76. uld be switched on Ask for the counter identity Input result from counter The response on the display of the controller is the identity of the counter If everything is OK the counter will identify itself as PM6669 YZW MN where Y difthe counter has an HF input otherwise 0 Z 3for MTCXO otherwise 1 W 6 GPIB bus is installed M Revision No of counter firmware N Revision No of GPIB bus firmware REMOTE 710 OUTPUT TIO VID ENTER 710 AS DISP AS GPIB INTERFACE OPERATION Two Ways of Programming The simplest way of programming the counter is by manually setting up the measurement you want from the front panel of the counter then let the controller ask the counter how it is set up The data the controller gets from the counter can be used to set up the same meas urement over and over again This method is called Bus learn and will be explained later The other method is to make a program message where each step of the set up is separately specified Programming Check List Check that the following steps have been taken to en sure correct programming of the instrument Normally only the six first steps must be programmed Do you know the current setting of the counter If not send device clear D to get the default settings Select Measuring function Default Frequency A Select Measuring time Default 0 2 s Select Trigger level offset Default Positive For
77. unction L4 Service request SR1 Description Code Remote local function RL1 Parallel poll PPO Device clear function DC1 Device trigger function DT1 Bus drivers E2 Source and Acceptor Handshake SH1 AH1 SH1 and AH1 simply means that the counter can ex change data with other instruments or a controller using the bus handshake lines DAV NRFD NADC Control Function CO The counter does not function as a controller Talker Function T5 The counter can send responses and the results of its measurements to other devices or to the controller T5 means that it has the following functions Basic talker Talk only mode It can send out a status byte as response to a serial poll from the controller Automatic un addressing as talker when it is addressed as a listener Listener Function L4 The counter can receive programming instructions from the controller L4 means the following functions Basic listener No listen only Automatic un addressing as listener when addressed as a talker Service Request SR1 The counter can call for attention from the controller e g when a measurement is completed and a result is avail able PM 6669 OPERATORS MANUAL Page 22 Remote Local RL1 You can control the counter manually locally from the front panel or remotely from the controller The LLO lo cal lock out function can disable the LOCAL button on the front panel Parallel Poll P
78. wer switch operates on the the built in microprocessor switches on all segments secondary side of the transformer The power cable of the display then it runs a power up test checking must be disconnected from the line outlet socket if it the measuring logic of the Frequency Counter before is necessary to completely isolate the Frequency the counter starts working This test takes about 2 Counter from the line seconds If an error is found an error code will be displayed Error 01 RAM memory error Try switching the Frequency Counter off and on Error 02 Measuring logic error again If error code 01 03 persists call Fluke serv Error 03 Internal bus error ice Look on the last page in this manual for Phone Error OF Overflow in the counting registers No and address Selects one of the nine measuring functions available The cursor does not stop at FREQ C if no Input C HF input is installed Reciprocal frequency measurement of the signal at In If the signal is sine shaped and the input AC coupled put A the minimum input frequency is 20 Hz at specified sensitivity Range 0 1 Hz to 16 MHz SINGLE measuring time 1 Hz to 160 MHz 0 2 1 and 10 s measuring time PM 6669 OPERATORS MANUAL Page 10 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL MEASURING TIME Move function cursor to SINGLE 0 2s 1s 10s HOLD AUTO Honga apes em FREQ B FUNCTION FREQ B l v

Fluke Universal Frequency Counter PM6669 Operator`s Manual

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