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1. FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A MAX MIN FUNCTION MEASURING TIME DISPLAY COMMON EXT AUTO READ 2 HO Move the measuring SINGLE BviaA REF LEVEL LEVEL MTIME 10 MEAS time cursor to 10 s TIME 10s FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A FUNCTION PM 6666 OPERATORS MANUAL OPERATING INSTRUCTIONS Page 15 FUNCTION AND RANGE HINTS AND COMMENTS The timer counter will measure the positive and negative The attenuator will switch in and out automatically when peak voltage an display them as voltage relative to 0 V needed during voltage measurements regardless if AUTO Range 51 V to 51 V LEVEL is selected or not The set Measuring time controls the time during which the If you wish to do one measurement instead of repetitive main gate is opened allowing pulses to enter the counting measurements see DISPL HOLD logic A longer Measuring time gives higher resolution re adouts with more digits displayed When TOT A Bor TOT A B is selected the Measuring time setting will be used to set the display time The time the gate is open is not exactly the preset Measur ing time because the Timer Counter synchronizes the measurement with the input signal in order to measure com plete periods If the period of the input signal is long
2. Cover remowval D DC Selecting Delimiters SEE Separators Device 1 Device Trigger Display hold Operating the button Display hold button LOCallODiu E Earthing SEE Grounding EOI mode SEE Output separator COGES 11 External reference CONNECTION T TT Description of function Location of connector External reference input Connection Free run From GPIB Page 45 Frequency A FIOI GPIB 26 GPIB COG 10 Selecting 10 Frequency 26 Selecting 10 Frequency C FIOI GPIB ai copa be ec Ris 26 GPIB COGS 12 Selecting 12 Function 10 Selecting 10 Function selection GP IB 26 Function selector button m P 6 G Get SEE Triggered GPIB address selector LOCA LOM T TT 5 GPIB interface connector LOGS HOD 5 GPIB INTERFACE 23 36 cH 8 High speed dump GP bp 31 Hold 16 HP controller GPIB example 34 IBM GPIB GPIB example
3. 36 ID GPIB 24 6666 OPERATORS MANUAL 46 Identity of the counter 24 Input A Operation 16 Input B Operation 16 Input C Operation 20 Input separator MP 25 Input settings 27 Input A BNC connector Location 6 Input B BNC connector uates Aide 6 Input C Lo6allOll aera 6 INSTALLATION 7 9 Installing options 8 L LCD display LOCAO RE 6 Listener function 23 LOC cote 16 DC coupling selection buttons 6 M Measuring Frequency 10 Frequency C 12 POO eom 12 Hallo AB ice 12 Time interval 12 Time selection 14 Totali ZE usus iit iris 12 o riz To ER 14 Measuring time From GPIB cssc 27 GPIB COC 14 Selecting 14 Measuring time selector button LOCO 6 Calibration 8 N Normal output format PBs 30 OPERATING INSTRUCTIONS 10 22 Operating the controls 10 Options Installation 8 Output mode GPIB x t 30 Output separator GPIB 26 6
4. 5 CONTENTS a 4 na Ec uci do 4 PRODUCT PRESENTATION 5 INSTALLATION iioii 7 rU 7 Voltage range selection 7 8 Connecting external reference 8 HSAN ite 8 Calibrating the 8 OPERATING INSTRUCTIONS 10 Using the Timer counter esses 10 Battery DIE assi pco Rd t a Co t e Do aed 22 ETI OF COGS e M X Up 22 GPIB INTERFACE 23 23 What do using the bus 23 Connecting the 1 24 Giving the counter an address 24 Checking the 24 Two ways of programming 25 EAEE P 25 Selecting output 26 How to select nnee 26 4822 872 20017 7 October 1996 Page 1 Selecting 27 Selecting Input settings 27
5. Peg 98555B 15 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 formula 2x16 5x16 7 x 107 9x16 8 16 5 16 5 162 5 16 11 600 0006209 This number is multiplied by multiplier O to get the meas uring result 600 0006209 x 10 6000 006209 6 000006209 x 10 Hz How many digits are significant Select the formula for LSD displayed in the Specifications There are different formulas for different measurements Frequency 25x10 x 6000 LSD displayed 0 0015 LSD 0 001 Hz The result is 6 000006 10 Hz Bus Learn Set the counter to LOCAL and select the functions you want from the front panel If required set the counter to Remote and program spe cial bus functions from the controller PM 6666 OPERATORS MANUAL GPIB INTERFACE OPERATION 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 Query Response characters FNC Functions setting e g FREQ AQ 9 MEAC Measurement control MTIME number FRUN ON20 20 TOUT number 9 INPA Input A settings TRGSLP POS ATT OFF 18 COUPL AC AUTO OFF 17 TRGLVL numbers SENS 1 19 INPB Input setti
6. i MEASURING TIME DISPLAY COMMON EXT AUTO READ Switches on or off SINGLE 0 2 s 10s HOLD BviaA REF LEVEL LEVEL DISPL DISPL HOLD when de HOLD pressed FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A MAN MAX MIN FUNCTION Not bus con trollable but Free run OFF will give a similar function See GPIB bus operation Connect the signal to ff INPUT A via a BNC 1MQ o 35pF Cable MAX 30Vrms A B Connect the signal to INPUT B via BNC 1M Q o aspp cable MAX 30Vrms PM 6666 OPERATORS MANUAL OPERATING INSTRUCTIONS FUNCTION AND RANGE Page 17 HINTS AND COMMENTS When reset is depressed the display and counting registers When the counter is controlled from the GPIB Bus the are cleared When reset is released a new measurement is LOCAL button can be disabled via the Local Lock out started The Measuring time Function and display hold settings are not affected If the TOT A MAN function is selected the RESET LOCAL button functions as a START STOP button One press starts the counting and the next press stops it A long de pression results in reset Display hold freezes the display but not until the measure ment in process has been finished A new measurement can always be initiated via the RESET button Use this input for all functions except FREQ C Input data Range DC Hz to 160 MHz Impedance 1 5 pF Mi
7. Check that the counter is operating correctly These procedures ensure unambiguous measurements of the signal voltage at the input of the counter Abnormal bit SEE Status byte AC Selecting 18 AC coupling selection buttons LOCAHOM ed cautes testatus 6 1 coii ta ice 24 Attenuator From eet 27 GPIB code 18 Operating 18 XT iudi e RR AI 18 MAO EH 18 Attenuator buttons LOCAU 6 Auto level From GPIB 27 Auto level button Bere illo D REPE 6 Auto On Off GPIB 6006 Lie ies 18 Selection 18 B Battery unit Operation 22 Preventive maintenance 22 SIOlAG E 22 Bus commands Summary 33 Bus GIriVet s uer ret reete ds 24 Bus learn GPIB babe 32 C Caution statements 4 Check list GPIB program 25 Checking GPIB communication 24 COM B via A button LOCAL OM REM 6 INDEX INDEX Common From GPIB a GPIB code Control function Controller Connecting GPIB Controls Coupling FROME GPIB 0 Selecting
8. 27 GPIB COC 18 Operation 18 SEE Trigger slope Slope selection buttons LO CANON 6 Source and Acceptor Handshake 23 SPECIFICATIONS 37 42 Start Stop Totalize ELO GPIB 27 Operation eee Pt 16 Starting a new measurement SEE Reset Status byte Clg 29 NE 4 T Talk only switch 24 Talker function 23 SUDDOED 6 Time interval GPIB COG iiid idees 12 Selecting 12 Time interval A B From GPIB 26 Time out 28 Totalize A Description of function 13 From GPIB 26 al IB COdG ci Li 12 Selecting 12 Trigger indicators LO Call OM 6 Trigger level FIOR GPIB vacate e 27 GPIB code 18 Trigger slope PROM GPL cuoi eine 27 Triggered mode FIOI GP Bas 28 U Dnpacking eei 7 V Volt max min From GPIB 26 GPIB 14 S6electtg 14 Voltage range Location 5 Selectirig eto ene 7 Warning statements 4
9. Ranges Same as for normal operation with the following ex ceptions Frequency Max measuring time 1 s Period average Max measuring time 1 4 s Time interval average 0 ns to 1 6 s Max measuring time 4 s Ratio 0 and 6x10 to 1 6x10 Ratio B A 0 and 6 10 to 1 6x10 Ratio C A C B 8 to 4x10 Max Data Output Rate Normal Mode Approx 5 readings s High Speed Dump Approx 100 readings s The highest output rate is obtained at SINGLE measuring time Output Time for Measuring Data Normal Mode Approx 9 ms 20 bytes High Speed Mode Approx 4 ms 1 5 bytes Response Time for Addressing Approx 600 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 1ms byte unless input buffer is full Battery Unit PM 9605 The PM 9605 is a rechargeable battery unit for mounting inside the counter The unit contains a standard 6V sealed lead acid battery and an automatic battery charger Battery Capacity 20 C Approx 15 Wh Operating Time When Battery Powered Approx 2 hours of continuous operation Recharging Time 7 hours to approx 75 of full capac ity Battery Protection Overcharge protection and deep discharge auto shut off protection PM 6666 OPERATORS MANUAL 42 Temperature Operating 0 to 40 C Storage
10. Unit Indication MHz kHz Hz mHz ks s ms s ns M m and n GATE Indicator Indicates that the counter is measur ing REMOTE Indicator Indicates when the counter is re motely controlled via an installed GPIB IEEE 488 interface PM 9604 Cursor Indicates selected measuring function se lected Measuring time input triggering display hold and whether an external reference frequency is in use Environmental Data Temperature Operating 0 C to 50 Storage 40 C to 70 Altitude Operating 5000m 53 3 kN m Storage 15 000m 15 2 kN m Humidity Operating 10 to 90 RH no condensation Storage 5 to 95 RH Vibration Test According to IEC 68Fc Bump Test According to IEC 68Eb Handling Test According to IEC 68Ec Mechanical Data Size 186 mm W x 88 mm H x 270 mm L 7 3 W x 3 5 in H x 10 6 in L Weight 2 1 kg 4 6 Ib SPECIFICATIONS Optional Accessories GPIB TEEE 488 Interface PM 9604 Mounting Inside counter cabinet InterfaceFunctions SH1 AH1 5 L4 SR1 RL1 DC1 DT1 E2 Address Setting Switch selectable at rear panel be tween 0 and 30 Factory preset at 10 Programmable Device Functions Measuring functions Measuring time Trig level offset selection 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
11. 40 C to 50 C Weight 0 8 kg 1 8 Ib 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 That second instrument can be a Philips 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 Carrying Case PM 9609 The PM 9609 15 a leather like carrying case for protection of the counter during transportation Ordering Information Models PM 6666 Timer Counter Included with the Instrument One year product warranty line cord operator manual and Certificate of Calibration Practices Optional Configurations When ordering select basic PM Model desired from above plus construct a 3 digit suffix by selecting 1 digit in each suffix column to identify Input Frequency Reference Oscillator and Interface Input Frequency Option 0 Standard 160 MHz 4 1 3 GHz PM 9608B 00 Reference Oscillator Option 1 Standard 3 MTCXO PM 9607 00 PM 6666 OPERATORS MANUAL SPECIFICATIONS Interface Option 1 Standard line voltage non GPIB IEEE 488
12. Selects Input A Selects Input B Triggering on positive slope Triggering on negative slope AC coupling DC coupling A and B common via Input A A and B separated num 1 gives 20 mV sensitivity num 2 gives 50 mV sensitivity num gives 100mV sensitivity TRGLVL num AUTO ON AUTO OFF ATT OFF ATT ON INPA INPB Page 33 Trigger level 5 10 V to 5 10 V polarity sign num level in Volt Automatic trigger level selection Trigger level selection via bus Attenuation 1 Attenuation 10 Output the current Input A settings Output the current Input B settings Measurement Control Commands GATE OPEN Starts the totalizing in TOTM A and TOTM B GATE CLOSE Stops totalizing MTIME num Set Measuring time num 0 01 to 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 to 25 5 s 0 Time Out OFF MEAC Output the current Measurement control settings Bus Related Commands OUTM number number High speed Output MTCXO dump format compensation 0 OFF NORMAL ON 1 SHORT ON 2 OFF NORMAL OFF 3 OFF SHORT OFF 4 ON FOR HIGH OFF SPEED DUMP MSR lt num gt Sets SRQ mask see Service request EOI ON Selects EOl mode ON EOI OFF Selects EOl mode OFF SPR lt num gt Select output separator see Output separat
13. 3 Battery PM 9605 00 6 GPIB IEEE 488 PM 9604 00 Example Ordering Configurating To order the PM 6666 with standard 160 MHz input MTCXO Oscillator and standard interface select ConfigurationPM 6666 Option Suffix Input O Oscillator 3 Interface 1 Yields Complete Model Number PM 6666 031 Options and Accessories PM 9581 011 500 Termination 3W PM 9585 011 50 Termination 1W PM 9604 001 GPIB Interface PM 9605 001 Battery Unit PM 9606 011 Rack Kit for PM 6666 PM 9606 021 Rack Kit for 2 Counters or Rack Kit for PM 6666 and 8840A 42A PM 2525 34 35 DMMs PM 9607 001 MTCXO Time Base PM 9608B 001 1 3 GHz HF Input PM 9609 001 Carrying Case All options can be field installed by the user The GPIB interface PM 9604 and the battery unit PM 9605 cannot be installed together in a PM 6666 counter Manuals 4822 872 20017 Operators Manual 4822 872 20018 Operators Manual German 4822 872 20019 Operators Manual French 4822 872 25007 Service Manual 4822 872 20016 GPIB Pocket Guide Customer Support Services Factory Warranty One year product warranty APPENDIX 1 43 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 impedance of 50Q constant output amplitude and the
14. Totalize Start Stop sees 27 Free RuncTEggeregsss 28 Service 28 SAUS DVI a 29 Output 9 29 USMC OM ETE 31 Programming data 31 What happens when switch to local 32 Summary of bus 32 Programming Examples 33 SPEGIFIGATIONS de ve deo 37 Measuring functions 37 Input specifications entente rna nie 38 AUXITIary TU CTONS occus docu rica pacati uda 39 NN ETE m T 39 General information 40 Optional accessories 41 Ordering information 42 Scis edd tee na ane cus 43 Checking the sensitivity of counters 44 Jy p zo d T TO en 45 PM 6666 OPERATORS MANUAL 2 5 FLUKE DECLARATION OF CONFORMITY for FLUKE Timer Counter PM 6666 Fluke Industrial B V Lelyweg 1 7602 EA Almelo The Netherlands Statement of Conformity Based on test results using appropriate standards the product is in conformity with Electromagnetic Compatibility Directive 89 336 EEC Low Voltage Directive 73 23 EEC Sample tests St
15. 10 OPERATING INSTRUCTIONS OPERATING INSTRUCTIONS Using the Timer Counter CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL POWER a two position SINGLE 028 ts HOLD BviaA REF LEVEL LEVEL No control ON mechanical push button A possible but D STAND BY Depressed ON MP gives the same 1 Released OFF LA settings as after power ON FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA MA A BAY N MAX MIN FUNCTION MEASURING TIME DISPLAY COMMON EXT AUTO READ SINGLE 0 25 1s 10s HOLD REF LEVEL LEVEL FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A MAN MAX MIN FUNCTION A short depression of One code for FUNCTION the FUNCTION button each function moves the cursor in the see below m lower edge of the display one step to the right If the button 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 Move function cursor 105 REF EU ENEL FREQ A FUNCTION to FREQ A FREQ m possible via FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A IN MAN MAX MIN FUNCTION PM 6666 OPERATORS MANUAL OPERATING INSTRUCTIONS FUNCTION AND RANGE Switches the power ON and OFF When switched on the built in microproc
16. 710 TO Z FHS COUNT 7500 210 220 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 7 280 GET FORMULA CHARACTER 290 FS B 1 1 300 GET MULTIPLYER CHARACTER 310 MS B 2 2 320 EVALUATE REGISTER 1 330 R1 0 340 FOR I 1 TO 8 350 SZNUM BSI LI 48 360 IF S gt 10 THEN S S 7 370 1 1 16 5 380 NEXTI 390 EVALUATE REGISTER 2 400 R2 0 410 FOR I 9 TO 14 420 SZNUM BS LI 48 430 IF S gt 10 THEN S S 7 440 RI R2 16 S 450 NEXT I 460 EVALUATE RESULT 470 IF F C THEN R 10000000 R2 R1 480 IF F F THEN R R1 16 6 R2 490 IF F G THEN R R2 R1 PM 6666 OPERATORS MANUAL 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 0 THEN R R 10 570 IF M P THEN R R 1 580 DISP B R 590 NEXTK 600 LOCAL 710 610 END Example of a result MEASURING TIME WILL BE SELECTED BY HP85 SINGLE ANSWER Y WHEN READY TO START 9 Y MAKE 500 MEASUREMENTS READY ELAPSED TIME 3 927 FIRST 5 RESULTS JP000000000031 0000049 JP000000000031 0000049 JP000000000030 0000048 JP000000000031 0000049 JP000000000031 0000049 12751 GPIB INTERFACE OPERATION For IBM PC with PM 2201 Example 1 The following example runs on an
17. A MAX MIN FUNCTION Move function cursor to du a ae 10s gy REF LEVEL ed TOTM A FUNCTION TOT A MAN TOTM B also possible via Bus FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A FUNCTION PM 6666 OPERATORS MANUAL OPERATING INSTRUCTIONS FUNCTION AND RANGE Page 13 HINTS AND COMMENTS Reciprocal frequency measurement of the signal at Input C Range 70 to 1300 MHz PM 9608B When you select SINGLE the Timer 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 Timer Counter divides the input frequency by 10 and meas ures the average period for the No of cycles in that time Range 8 ns to 1 s The number of pulses at Input A and the number of pulses at Input B are fed into one register each When the set Measuring time has elapsed register A is divided by regis ter B Range 1 107 to 1 2 10 The Timer Counter measures the time between a positive slope on Input A and a positive slope on Input B default Range 100 ns to 2 10 s SINGLE 0 ns to 20 s average the signal must be asynchronus with the time base The cursor does not stop at FREQ C if no Input C HF input is installed Use SINGLE when the input frequency is low This shortens the measuring time c
18. IBM compatible PC equipped with Fluke PM 2201 GPIB interface The installa tion and starting up of the PC program is not described only the application program Line 1 to 100 must contain the declaration described in the PM 2201 manual The program sets up the counter for 10 Period A measure ments and presents the average result on the screen 100 DEMO PROGRAM NO 1 110 PM6666 AND IBM PC 120 WITH PM2201 GPIB INTERFACE 130 AS CONTROLLER 140 CLS CLEAR SCREEN 150 7 ADAPTOR NUMBER 160 ADDR 710 COUNTER ADDRESS 170 1 SYSTEM CONTROLLER 180 SPACE 25 RESULT 190 ACT 0 READ CHARACTERS IN RES 200 24 MAX CHARACTERS TO READ IN RES 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 SEND A TRIG ON MTIME 1 280 LENGTH LEN SEND 290 CALL IOOUTPUTS ADDR SEND LENGTH 300 7 0 310 INPUT 10 SAMPLES 320 FORi 17TO10 330 CALL IOTRIGGER ADDR TRIGGER COUNTER 340 CALL IOENTERS ADDR RES MAX ACT READ RESULT 350 Zz2Z VAL MIDS RESS 8 13 360 370 PRINT AVERAGE 5Z 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 ou
19. MANUAL 4 SAFETY SAFETY Introduction Read this page carefully before you install and use the PM 6666 Timer Counter This Timer Counter has been designed and tested in ac cordance 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 6666 This knowledge can be gained by thoroughly studying this manual Safety Precautions Use generally accepted safety procedures in addition to the safety precautions stated in this manual to ensure per sonal safety and safe operation of the Timer 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 Timer Counter without read ing the Service Manual which contains the relevant warn ings for such activities CAUTION Indicates where incorrect operating pro cedures can cause damage destruction of equipment or other property WARNING Indicates a potential danger that re quires correct procedures or practices in order to prevent personal injury PM 6666 OPERATORS MANUAL Symbols Indicates where the protective ground lead is connected inside the instrument Never un screw or loosen this screw pu Signal Ground symbol This symbol indicates that the signal ground of the connectors are in ternally connect
20. 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 select short output format the number of digits may vary depending on the measurement result The example below shows a re sult 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 1 667 4 Overflow 9 99999999 9 High speed Dump The most time consuming part of a measuring cycle is cal culating the result The calculations limit the number of possible results second to about 5 even when the ing time is short GPIB INTERFACE OPERATION 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 measure ments second High speed dump cannot be used for voltage measure ments nor for Totalize manually compensation 1 not possible Starting NOTE Allways 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 pro grammed the counter will immediately start transmitting
21. Program data out queries Device identity query Programming Code Format 7 bit ISO code ASCII characters Both upper and lower case char acters are ac cepted Output Format Function code to 6 characters Normally space 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 FFFFFFOXXXXXXXXXXE XS S 21 22 characters When you select Short output format FFFFFF and lea ding zeroes are omitted 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 except 27 ESC In addition the combination 132 10 CR LF can be pro grammed The EOI line can be programmed to be active to gether with the last output byte sent Page 41 Input Separator The counter accepts the following characters as separators ETX ETB CR LF space comma colon semicolon High Speed Dump The contents of the counting regis ters are transferred to the controller without being proc essed by the counter The processing must be done in the controller instead The output format is FMXXXXXXXXXXXXS S where F is calculation formula M is multiplier X X 12 hex digits representing the register contents and S S is the set out put separator
22. REF indicator on the display is not switched on until after the first measurement PM 6666 OPERATORS MANUAL 22 Battery Unit Operation When a battery unit is installed the counter can operate for 2 hours without mains supply WARNING When battery operated the counter is not grounded You must not connect the counter to any signal that is higher than 30Vrms from ground potential If you do the counter will be dangerous The display starts blinking shortly before the battery is dis charged 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 capacity 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 disconnect the mains You must first switch the counter OFF with the power switch then ON again before the battery unit sup plies the counter 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 cy cling the battery a number of times but a restored battery will never reach the capacity of a new one If you must store your counter for some time without using it
23. has occurred When the event occurs the bit is set to 1 It is not reset to O until a new measurement starts The different bits indicate the following information Bit Function Always 0 1 has been sent otherwise 0 Event bit Abnormal bit Always 0 1 if something is wrong during normal Affects bit 0 3 measurements 4 0 Main Gate closed 1 Main Gate open 3 0 Depends on Abnormal below Event bits bit Bit Abnormal bit 1 3 Not Used 2 Time Out 1 0 O N Abnormal bit 0 Measuring stop enable Measuring start enable Ready for triggering Measuring result ready Hardware fault Programing error Only if SRQ mask is set for Service Request This is a conditional bit that monitors the Main Gate in the counter When TOT MAN is selected the bit will always be 0 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 measure ment and the status byte stops at XX00X1XX input signal The measurement is ready to start bit 2 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 2 don t care NOTE SRQ is normally not use
24. micro processor on the interface board has made it possible to add functions You can obtain continuously variable Meas uring time bus learn high speed dump etc but these func tions are only accessible 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 remem ber E g the command to select Frequency C is FREQ C and the command to select Ratio A B is RATIO A B NOTE The characters in a command can be in both upper and lower case What can I do using the Bus All the capabilities of the interface for the PM 6666 are ex plained below If you want a complete description of all GPIB interface functions read the Fluke Instrumentation Systems Reference Manual Summary Description Code Source handshake SH1 Acceptor handshake Control function CO Talker Function 5 Listener function L4 Service request SR1 Remote local function 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 Control Function CO The counter does not function as a controller Talker Function 5 The counter can send responses and the results of its measurements to other devices or
25. store itin cool and dry place Leave the counter with the mains cable connected if possible If not don t discon nect 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 6666 OPERATORS MANUAL OPERATING INSTRUCTIONS Error Codes The counter can display the following error codes if some thing 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 03 per sists call Fluke service Look on the last page in this man ual for Phone No and address GPIB INTERFACE OPERATION Page 23 GPIB INTERFACE OPERATION Introduction The PM 6666 can be controlled by a computer controller 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 the power switch The additional
26. to the controller 5 means that it has the following functions Basic talker Talk only mode 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 listen only Automatic un addressing as listener when addressed as a talker Service Request SH1 The counter can call for attention from the controller e g when a measurement is completed and a result is available Remote Local RL1 You can control the counter manually locally from the front panel or remotely from the controller The LLO local lock out function can disable the LOCAL button on the front panel PM 6666 OPERATORS MANUAL 24 Parallel Poll PPO 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 no
27. 0 MHz to 1 3 GHz LSD Displayed Ratio A B 25 meas time x FREQ B 0 2 1 or 10 s measuring times LSD Displayed Ratio B A 2 5 meas time x FREQ B 0 2 1 or 10 s measuring time LSD Displayed Ratio A B Single and Ratio B A Single 1 RATIO 10 5x RATIO TE RATIO gt 10 LSD Displayed Ratio C A or 640 meas time x FREQ A or B Time Interval A B time interval B A via GPIB IEEE 488 only Range 100nsto2x 109s SINGLE 0 ns to 20s aver age Mode Single time interval SINGLE for time interval measurements at 0 25 1s or 10s measuring times PM 6666 OPERATORS MANUAL 38 LSD Displayed SINGLE time interval measurement 100ns Time lt 1005 XT Time gt 1005 10 s ina 25 10 Average time interval measurements LM Averaged Number of Intervals N measuring time pulse repetition time Note Input signals must be repetitive and asynchronous with respect to the time base Min Dead Time from Stop to Start 250 ns Timing Difference A B Channels 4 ns max Totalize A totalize B via GPIB IEEE 488 only Range 0 Ix 10 with indication of or M kilopulses or Megapulses the result is truncated if out of display range Frequency Range 0 Hz to 12 MHz Pulse Pair Resolution 80 ns LSD Displayed 1 unit count counts lt 10 5 x counts 10 counts 21 0 Gated by B A Mode Event counting on input A B during the duration of a pulse on input B A Start St
28. 230 INPUT 10 SAMPLES 240 Z 0 250 FOR 1 I TO 10 260 CALL IBTRG CNT TRIGGER COUNTER 270 CALL IBRD CNT RD READ RESULT STRING 280 Z Z VAL MIDS RDS 8 13 200 NEXTI 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 37 SPECIFICATIONS Measuring Functions Frequency A or C frequency B via GPIB IEEE 488 only Range Freq A 0 1 Hz to 160 MHz 1 20 MHz to 160 MHz with limited temperature range typical 23 5 Freq B 0 1 Hz to 16 MHz via GPIB IEEE 488 only Freq C 70 MHz to 1 3 GHz optional Mode Reciprocal frequency counting 25x10 x FREQ LSD Displayed _ _ measuring time Period A Range 8ns to 2 x 103 Mode Single period measurement SINGLE or average period measurement at 0 2s Is or 10s measuring times LSD Displayed SINGLE period measurement 100 ns Time lt 100s 5 x PERIOD Time gt 100s 10 s Average period measurement 25 10 x PERIOD measuring time Ratio A B ratio B A C A or C B via GPIB IEEE 488 only Range 1 10 to 2 x 10 1 x 10 to 2 x 10 B A 0 to 1 x 10 SINGLE and B A SINGLE 8 to 6 x 10 C A C B Frequency Range Input A 0 MHz to 160 MHz 0 MHz to 16 MHz B A C A A B SINGLE 120 MHz to 160 MHz with limited tem perature range typical 23 5 Input B 0 MHz to 16 MHz Input C 7
29. 666 OPERATORS MANUAL INDEX Parallel poll 24 Period Fom GPIB 26 Period A GPIB COdC antec 12 Selecting sss 12 PM 2201 GPIB example 35 Power switch LOCATION NET TER 6 Operating 10 Power inlet socket Location 5 PRODUCT PRESENTATION 5 6 Programming check list 25 Queries 32 R Ratio A B From GPIB 26 GPIB COJE 12 Selecting esse 12 Read 20 GPIB 20 Head level button LOCATON 6 Rear 5 Hemote local 23 Removing the cover 8 Heset Description of function 17 Operating the button 16 Reset button Location ne etn 6 S ACL 4 Screws for removing the cover 5 Selecting function GPIB 26 Sensitivity 27 GPIB COG itii 18 Separators FERRE 25 26 Service 23 GPIB 28 Set value Description of function 19 Operation 18 Set value button Location 6 Short output format GPIB odisti ditus 30 Slope From GPIB
30. 8 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 0 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 out put measurement results on the bus continuously It will not react to any incoming commands This setting may only be used if the counter is connected 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 con troller Type on controller REMOTE 710 This should happen The remote indicator should be switched on OUTPUT TIO AIDT Ask for the counter identity ENTER 710 Input result from counter DISP AS The response on the display of the controller is the identity of the counter If everything is OK the counter will identify itself as PM6666 YZW MN where Y Aifthe counter has an HF input otherwise 0 Z for MTCXO otherwise 1 W 6 GPIB bus is installed Revision No of counter firmware N Revision No of GPIB bus firmware GPIB INTERFA
31. ANSWER PER A MTIME 0 RESULT READ AS PER 0000001 00E 5 INPUT YOUR PROGRAMMING MESSAGE TO QUIT THE PROGRAM ANSWER PM 6666 OPERATORS MANUAL For IBM PC with IBM GPIB This example runs on an IBM PC with 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 6666 with address 10 The device parameters are set with the configuration program IBCONF see the IBM adapter manual Device Name COUNTER DEVICE PARAMETERS DESCRIPTION NEW VALUE VALID NAME Access Adapter Name GPIBx Primary GPIB Address OH to 1EH Secondary GPIB Address 60H to 7EH OH disables Timeout setting T10us to T1000s TNONE disables EOS Byte OH to FFH or character Terminate Read on EOS Yes or No Send EOI with EOS byte Yes or No Use 8 bit Compare on EOS Yes or No I 1 o Send EOI w last Byte of Write 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 6666 AND IBM PC WITH IBM 120 GPIB ADAPTOR AS CONTROLLER 130 CLS CLEAR SCREEN 140 INIT 150 ADNAMES COUNTER 160 CALL IBFIND ADNAME CNT 170 SEND SDC 180 CALL IBCLR CNT 190 SELECT PERIOD TRIGGED MODE 200 AND MEASURING TIME 1 210 WRT A TRIG ON MTIME 1 220 CALL IBWRT CNT WRTS
32. C connector C Measuring time selector button M Trigger indicators D Function selector button N Attenuator buttons E Display hold button Freezes the display O Slope selection buttons F COMB via A button connects the signal on input A P DC or AC coupling selection buttons to The Input A attenuator and AC DC Q Large LCD display switch affect both inputs Tilting support G Input C BNC connector optional Input A BNC connector l Set value button depress to set sensitivity AC or trig The selected function is indicated on the display A short ger level DC press on the button moves the cursor one step to the right A long press makes the cursor scroll PM 6666 OPERATORS MANUAL INSTALLATION Page 7 INSTALLATION Unpacking If the Timer Counter is cold leave it in the cardboard box until it has reached normal room temperature Lift the Timer Counter out of the box Remove the polystyrene supports Unpack the Timer Counter from the plastic bag Reverse the procedure to pack Check List Has the Timer 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 re placement of the instrument easier Check that the package contains the following items in addition to the Timer Counter This Operators Manual power cable with protective ear
33. CE OPERATION Two Ways of Programming The simplest way of programming the counter is by manu ally 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 measurement 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 Checklist Check that the following steps have been taken to ensure 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 slopes Default on Input A and Input B Positive Select Coupling Default on Input A AC Default on Input B DC Select Trigger level Default AUTO For advanced programming check the following steps 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 O s Set Output mode Default Norma
34. NUAL 20 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL The READ LEVEL push LEVEL LEVEL B Use INPA and v button When the EF LEVEL LEVEL INPB to read indicator is on the input settings to display shows the T the controler READ trigger levels on the dnm display COM The COMMON B via A SINGLE 4s HOLD BviaA REF LEVEL LEVEL COM ON vee push button When the COM OFF indicator is on the signal on Input A is also connected to Input B om CIN Connect the signal to INPUT C via BNC 50 0 cable 12Wms EXT REF INPUT Connect an external SINGLE 02s 10s HOLD BviaA REF LEVEL LEVEL Not bus y 10 MHz frequency controllable 10MHz 0 5 15Vrms source to the BNC connector on the rear panel of the Timer Counter marked EXT REF INPUT PM 6666 OPERATORS MANUAL FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A ININ MAN MAX MIN FUNCTION OPERATING INSTRUCTIONS Page 21 FUNCTION AND RANGE HINTS AND COMMENTS When active trigger levels will be displayed according to Use Read Level to check what trigger levels Auto Level has this table selected Auto Level Manual DC Level selected Level set using by Auto Set Value AC Level selected 0 V by auto When active the signal on Input A is also connected to In You can use COM B via A
35. PM9607 V A 10MH 0 5 15Vrms Figure 1 Hear View ON OF Rear View S Rear feet T Screws for removing the cover U External reference input BNC connector V Voltage range selector W Power inlet socket X GPIB interface connector optional Y GPIB address selector option SUPPORTED FUNCTIONS SH1 AH1 T5 L4 SR1 RL1 DC1 DT1 E2 VOLTAGE SELECTOR 5 N D LR 39484 THERMZZ FUSE IN MAINS JAANSFORMER PM 6666 OPERATORS MANUAL 6 PRODUCT PRESENTATION PROGRAMMABLE TIMER COUNTEN MEASURING TINE DISPLAY EXT AUTO READ SINGLE 0 25 HOL B via A REF LEVEL LEVEL DC TRIGGER LEVEL AC SENSITIVITY a bd FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A A B B MAN 4 ON RESET MEAS DISPL COMMON OPTION 4 STANDBY LOCAL TIME FUNCTION BviaA J J J J y _ JARTSTO MAXJi2Vrms WV 7 O Figure 2 Front View Front View J Auto level starts automatic trigger level setting If Set A Power switch Value is selected this button is used to increase the value B Reset button doubles as Local button if the Timer Counter is equipped with an GPIB interface K Read level displays trigger levels If Set Value is de Starts and stops counting if the TOT A MAN func pressed this button is used to decrease the value tion is selected L Input B BN
36. PRINT B 620 NEXTI 630 RETURN Example of a result COUNTER SETTING TIME A B MTIME 1 00 FRUN ON TOUT 00 0 MSR 000 0UTM 000 EIO OFESPR 010 INPA TRGSLP NEG INPB TRGSLP POS COUTER TYPE 6666 016 22 6666 OPERATORS MANUAL 36 GPIB INTERFACE OPERATION Example 3 This program prompts the user to input a programming se quence The sequence is then sent to the PM 6666 and the corresponding measuring result is read 100 DEMO PROGRAM 110 PM6666 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 8 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 S L OUTPUT STRING 290 TO BE SURE TRIGGER COUNTER 300 CALL IOTRIGGER ADDR 310 THE MEASURING RESULT 320 MAX 25 330 ACT 20 340 RESSZSPACES 25 350 CALL IOENTERS ADDR RES MAX ACT 360 PRINT 370 PRINT RESULT READ AS RES 380 PRINT 390 GOTO 210 Example of a result INPUT YOUR PROGRAMMING MESSAGE TO QUIT THE PROGRAM
37. Q 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 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 meas urement 0 2 6 22 30 14 15 0 Important Decimal Binary bits X 76543210 don t care Comment 0 00000000 Preparing a measurement or High speed dump or Volt measurements in progress Preparations ready If Free run OFF Measuring start enable Main Gate open Measuring stop enable Calculating the measuring result Measuring result ready 2 00000010 XXOXXX1X 6 00000110 XXOXX1XX 22 00010110 30 00011110 XX01XXXX XXOX1XXX 14 00001110 15 00001 111 XXOXXXX1 PM 6666 OPERATORS MANUAL 30 Error conditions Important Decimal Binary bits X 76543210 don t care Comment 33 00100001 XX1 XXXX1 Programming error 34 00100010 XX1 XXX1X Hardware fault 36 00100100 XX1XX1 XX Time out If 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 resu
38. REQ C FUNCTION FREQ C FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A MAN MAX MIN FUNCTION MEASURING TIME DISPLAY COMMON EXT AUTO READ Move function cursor to SINGLE 0 25 1s 10s HOLD BviaA REF LEVEL LEVEL PERA FUNCTION PER A FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A MAN MAX MIN FUNCTION Move function cursor to anae S Sie We Bara RATIO A B FUNCTION RATIO A B RATIO B A RATIO C A and RATIO C B also possible FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA Vi a bu S A C A MAN MAX MIN FUNCTION Move function cursor to gt ee TIME A B FUNCTION TIME A B TIME B A also possible via bus FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A MAN MAX MIN FUNCTION Move function cursor to ue a cus ode PER TOTG A B FUNCTION TOTA B TOTG B A also possible via bus FREQ FREQ PERIOD RATIO TIME VOLTA BA MAN MAX MIN FUNCTION Move function cursor to ine noD LEVEL LEVEL TOTS A B FUNCTION TOTA B TOTS B A also possible m via bus FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C
39. a result is expected to be ready If no result is achieved before the set time is out the counter can out put a Service Request SRQ Time Out must be selected in the SRQ mask see Service Request The program ming command is TOUT numbers The timeout can 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 Time out can be switched on when free run is on but it will not serve any purpose PM 6666 OPERATORS MANUAL GPIB INTERFACE OPERATION 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 te
40. and the manual trigger level put B settings to make accurate rise time measurements The DC AC and Attenuator switches for Input A affects both 1 Input A and B The Input B DC AC and Attenuator switches have no effect See figure 7 2 Trigger level sensitivity and Slope can be selected sepa 3 rately 4 5 6 Select AC coupling COM B via A and positive slope for input A and B Select VOLT A MAX MIN and read the amplitude of the signal Calculate 10 96 of the peak to peak voltage Depress SET A use and to set trigger level A to the MIN reading plus the 10 96 of Vpp Depress SET B use and to set trigger level B to the MAX reading minus the 10 96 of Vpp Select TIME A B This is the HF input which must be used when the FREQ C RATIO C A and RATIO C B can be selected via the bus function is selected If the Timer Counter does not include the Input C option the BNC connector is replaced by a plas tic plug Range 70 to 1300 MHz Impedance 500 Sensitivity 10 mVprms up to 900 MHz 15 mVrms 900 1100 MHz and 40 mVnws above Max voltage 12 VRMS The Timer Counter automatically detects if a suitable signal Use external reference when the measurement requires is connected to the EXT REF Input connector ultra high stability Suitable signal The Timer Counter must still have the internal time base 10 0 1 MHz 0 5 to 15 Vrms Sine wave even if an external reference frequency is used If single is selected the EXT
41. andards used IEC 348 1978 Safety Requirements for Electronic Measuring Apparatus EN 50081 1 1992 Electromagnetic Compatibility Generic Emission Standard EN55011 EN 50082 1 1992 Electromagnetic Compatibility Generic Immunity Standard IEC801 2 3 4 The tests have been performed in a typical configuration This Conformity is indicated by the symbol C i e Conformit europ enne DMB70 08 95206 PM 6666 OPERATORS MANUAL 5 Page 3 Guarantee Statement This Fluke guarantee is in addition to all rights which the buyer may have against his supplier under the sales agreement be tween the buyer and the supplier and according to local legislation Fluke guarantees this product to be free from defects in material and workmanship under normal use and service for a pe riod of one 1 year from the date of shipment This guarantee does not cover possible required re calibration and or stand ard maintenance actions This guarantee extends only to the original end purchaser and does not apply to fuses batteries or to any product or part thereof that has been misused altered or has been subjected to abnormal conditions of operation and handling Fluke supplied software is guaranteed to be properly recorded on non defective media We will replace improperly recorded media without charge for 90 days after shipment upon receipt of the software Our software is not guaranteed to be error free Fluke obliga
42. counter has a 50Q input impedance the input signal of the counter is in theory independent of the cable length However if the in put impedance deviates from 50Q there will be standing wave reflections which will cause changes in the ampli tude of the signal between the signal 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 50Q ca pacitive load at 100 MHz Consequently it is of the utmost importance to know how sensitivity is measured Recommended Instruments Signal source with a 50Q output impedance gt 350 MHz oscilloscope with a 500 input impedance BNC Fpiece Two BNC cables one short and one long High Impedance Inputs 1 MQ Counter Oscilloscope under test gt 350 MHz Signal source 1 directly on counter Shortest cable if required possible Figure 9 Connect the instruments like this Preparations Connect the instruments as illustrated in the figure above Turn off AUTO and set the counter to maximum sensitivity Method 1 Adjust the amplitude of the signal source to the minimum 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 amp
43. d for these bits Ready For Triggering indicates that all preparations for a measurement is completed The preparation time depends on selected functions It can be up to 700 ms when auto triggering 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 ing This way the controller knows when it is possible to trigger the counter Page 29 Measuring Result Ready indicates that the measurement and calculation of the result is completed and that the re sult is present in the output buffer If SRQ for is selected for this event or Free run is OFF the counting will stop un til 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 pro gramming messages and use them when the error status is reset and a new measurement starts Correct the program before resetting the status message Use one of the following bus commands to reset the status byte Go to local GTL Device clear DCL or selective device clear SDC Any of the following messages will have the same effect on the counter D FNC MEAC INPA INPB ID or BUS A serial poll will also reset the status message if the SR
44. different calculations must be made to convert the register contents to readable measuring results The first letter F in the output data indicates which for mula you must use If F Use this formula Reg 2 x10 Reg 1 F Reg 3 G Reg 2 x 107 Heg 1 1 107 Reg 2 Reg 3 x107 K Reg 2 x10 Reg 1 Multiplier The second letter M in the output data repre sents 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 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 A PER 000001 667E 4 OUTPUT 710 0UTM 4 ENTER 710 A A JP000000000683 J means that you must use formula J which is Reg 3 107 6666 OPERATORS MANUAL 32 000000000683 1 the hex contents of register 3 The regis ter contents must be converted to a decimal number and entered in the formula 683 5 6X16 8X16 3 1667 pecimal The result is 1667107 which you must multiply by Multi plier P which is 1 to get the measuring result 1667 x10 x12 1667 x10 s 166 715 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 I ENTER 710 A A FREQ 006 000006E3 OUTPUT 710 0UTM 4 ENTER 710 A A CO98555B000257 Reg 2 x107 Formula
45. eas Command Comment Time 0 2 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 2ms MTIME 0 002 Out of range SINGLE MTIME A display time of 50 ms is set so that you can see the Gate indicator 255 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 The Measuring time cursor on the display will indicate 0 2 s for all programmed Measuring times except SIN GLE which will be indicated as usual Selecting Input settings Before selecting input settings you must tell the counter which input you want to address Input Command Comment A INPA Default setting B INPB Now you can send the input setting commands Attenuator Command Comment 1 Default 10 ATT ON Trigger slope Command Comment Positive TRGSLP POS Negative TRGSLP NEG Coupling Command Comment AC COUPL AC Default on A DC COUPL DC Default on B Sensitivity Command Comment SENS number 20 mV SENS 1 Default 50 mV SENS 2 100 mV SENS 3 If ATT10 is selected sensitivity will be 0 2 V 0 5 V and 1 0 V Page 27 Trigger level Command Comment Volt TRGLVL lt num gt lt num gt trigger level in Volts Range 5 10V to 5 10V Minimum increment 0 02 V Default 0 V If ATT10 is selected Trigg
46. ed to the other connectors with the same symbol and to parts that are easily ac cessible for the user Warning the metallic BNC s will carry the same voltage Applying signals with a common potential of more than 30Vrms 42Vpk or 60Vdc above ground potential will make the instrument dangerous Indicates that the operator should consult the manual Such symbols are printed near the input connectors This symbol on the instrument should encourage the user to use the correct procedure for common instrument ground and maximum input voltages as described in the Installa tion Chapter Specification and Battety Unit description 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 servicing department E g The instrument is likely to be unsafe if it is visibly damaged PRODUCT PRESENTATION Page 5 PRODUCT PRESENTATION General The PM 6666 1 a compact high resolution reciprocal Timer Counter which performs many functions A number of options are available i e HF input GPIB interface high stability oscillator and rechargeable battery for field use A rack mount kit and a carrying case are also available as accessories IEEE 488 II TERFACE TALK Z ADDRESS 168421 INCLUDED OPTIONS EXT REF INPUT 9604 PM9608B 9605
47. elected as output separator as well as an active EOl signal Order of Commands in a Program Message Normally the programming commands in a programming message can be placed in any order However the following commands must always be placed at the end of a program message since any command sent after them will disable the selection INPA MEAC FNC X INPB 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 numeri cal value lt number gt can be entered any format you like PM 6666 OPERATORS MANUAL 26 e g 1 23 can also be entered as 0 000000123 1 0 or 1230000107 If you enter more digits than the counter needs your entry will be truncated The counter will stop if an entry is out of the counters range To proceed the status message Programming error must be reset see Status byte Selecting Output Separator Output separators terminate messages from the counter to the controller The separator needed is different for dif ferent controllers see the Operators Manual for your con troller At power on the output separator of the counter 1 line feed LF 10decimal The output separator can be changed by sending SPR numbers to the counter number is the decimal value of the ISO ASCII code for
48. er level range will be 51 V to 51 V and the minimum increment 0 2 V The following commands affect both inputs regardless of which input is selected Auto level Command Comment Automatic AUTO ON Default Manual AUTO OFF If AUTO is ON the attenuator trigger level and sensitivity settings are controlled by AUTO If any of these parame ters are reprogrammed when AUTO is ON the new setting will be stored and used when AUTO is switched OFF If the controller asks for program data out during AUTO the an swer will be the selections made by AUTO Common B via A Command Comment on COM ON off COM OFF Default When COM ON is selected the AC DC and attenuator set tings of Input A will affect both channels If AC DC or the attenuator of input B is reprogrammed during COM ON the setting will be stored and used when COM is switched OFF The program data out for Input B will be the pro grammed settings not the Input A settings used during COM ON Totalize Start Stop When TOT A or TOT B manual is 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 se lecting TOTM A or TOTM B 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 accumu late the results in the counting registers Any other command but GATE OPEN GATE CLOSE will s
49. er than the set Measuring time the main gate does not close again until the period is completed For PER A and TIME A B exactly one period or one time in The input frequency is limited to 16 MHz for FREQ A and terval is measured The minimum result possible is 100 ns PERA The display time will be 100 ms If external reference is used the EXT REF indicator will not be switched on until after the first measurement When set to SINGLE and FREQ A the Measuring time is one cycle of the input signal or 3 ms whichever is longest When set to SINGLE and FREQ C the Measuring time is 3 ms A Frequency A measurement will result in 6 to 7 digits on the display A Frequency A measurement will result in 7 to 8 digits on the display A Frequency A measurement will result in 8 to 9 digits on the display PM 6666 OPERATORS MANUAL 16 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL RESET RESET LOCAL a short SINGLE 028 1 HOLD BvA REF LEVEL LEVEL X starts a new LOCAL press 15 enough for measurement Reset When the remote a indicator is on a press GATE OPEN TOTALIZE A will cause the counter to starts and START STOP switch back to LOCAL FREQ FREQ PERIOD RATIO TIME VOLT A GATE CLOSE i e control from the front FUNCTION stops Totalize panel MAN TOTALIZE START STOP one press starts totalizing the next press stops
50. esolution FREQ PERIOD RATIO or TIME relative trigger error relative time base error trelative systematic error Relative Trigger Error Freq A Period A noise voltage A Vp p signal slope A V s x meas time Ratio A B noise voltage B Vp p _ signal slope B V s x meas time Totalize A Gated or Start Stop by B noise voltage B Vp p _ signal slope B V s x gate time Time A B noise voltage A Vp p signal slope x TIME noise voltage B Vp p signal slope V s x TIME x JN Relative Time Base Error n deviation from 10 MHz 10 MHz Relative Time Systematic Error caused by timing difference between A and B channels lt 4 ns TIME General Specifications Power Requirements Line Voltage 115V or 230Vrms 15 45 Hz to 440 Hz 20 VA PM 6666 including all options Safety In accordance with IEC 348 Class 1 and CSA 556B CE Line Interference Below VDE 0871 and MIL STD 461 CE Battery Unit See PM 9605 option PM 6666 OPERATORS MANUAL Time Base Crystal oscillator Stability Oscillator Version Against Standard MTCXO Aging Per Month lt 5 x 10 1x 1077 1Hz Per Year lt 5 x 10 6 50 2 5 x 10 bHz Temperature 0 to 50 C lt 1 x 10 100Hz 2x10 2Hz Line Voltage Changes 10 lt 1 x 10 8 0 1 2 1 x 10 0 01Hz Display Readout 9 digit LCD with unit and cursor indication
51. essor switches on all segments of the dis play then it runs a power up test checking the measuring logic of the Timer Counter before the counter starts work ing This test takes about 2 seconds If an error is found an error code will be displayed Try switching the Timer Counter off and on again If error code 01 03 persists call Fluke service Look on the last page in this manual for Phone No and address Selects one of the nine measuring functions available Reciprocal frequency measurement of the signal at Input A Range 0 1 Hz to 16 MHz SINGLE measuring time 1 Hz to 160 MHz 0 2 1 and 10 s measuring time Page 11 HINTS AND COMMENTS WARNING The power switch operates on the secondary side of the transformer The power cable must be disconnected from the line outlet socket if it is necessary to completely isolate the Timer Counter from the line Error 01 RAM memory error Error 02 Measuring logic error Error 03 Internal bus error Error OF Overflow in the counting registers The cursor does not stop at FREQ if no Input C HF input is installed If the signal is sine shaped and the input AC coupled the minimum input frequency is 20 Hz at specified sensitivity PM 6666 OPERATORS MANUAL 12 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL MEASURING TIME DISPLAY COMMON EXT AUTO READ Move function cursor to SINGLE 0 25 15 10s HOLD BviaA REF LEVEL LEVEL F
52. he counter will never have settings in LO CAL which are When switching to remote again the LOCAL setting will re not possible to set via the front panel main Bus functions like SRQ mask output separator EOI etc will not be altered by switching to LOCAL and back again Summary of Bus Commands Function Selecting Commands FREQ FREQ FREQ PERA TIME A B TIME B A TOTS RATIO A RATIO A RATIO C RATIO C B VMAX A VMIN A VMAX B VMIN B FNC Frequency measurement on Input A Frequency measurement on Frequency measurement on Input C Period on Input A Time interval A to B Time interval B to A Totalize A gated by Input B Totalize B gated by Input A Totalize A started and stopped by B Totalize B started and stopped by Totalize A start stop by GATE OPEN CLOSED on the bus Totalize B start stop by GATE OPEN CLOSED on the bus No of pulses on A No of pulses on B No of pulses on B No of pulses on A No of pulses on No of pulses on A No of pulses on C No of pulses B Positive peak voltage on Input A Negative peak voltage on Input A Positive peak voltage on Input B Negative peak voltage on Input B Output the current function setting Input Setting Commands INPA INPB TRGSLP POS TRGSLP NEG COUPL AC COUPL DC COM ON COM OFF SENS num
53. icator on or off AUTO LEVEL FREQ FREQ PERIOD RATIO TIME TOT A TOT A TOTA VOLTA SET Depress the SET SINGLE 025 10s HOLD BwiaA REF LEVEL LEVEL Separate 2 VALUE button once and Codes for the indicator in the trigger level button switches on Now and sensitivity the auto level and Read SENS1 20 mV level buttons have the FREQ 10 PERIOD RATO TME VOLTA SENS2 50 mV red arrow up and down FUNCTION SENS3 100mV function Another press SINGLE 0 is HOLD BviaA REF LEVEL LEVEL TRGLVL will switch off the num function num 5 1 to 45 1 V NOTE Sensitivity can You must first be set when AC coupled select input and Trigger Level when with INPA or DC coupled INPB OPERATING INSTRUCTIONS FUNCTION AND RANGE When the indicator in the button is OFF the signal is un at tenuated the trigger level range is 5 V to 5 V and the sensitivity can be 0 02 0 05 or 0 1 V When the indicator is ON the signal is attenuated 10 times the Trigger level range becomes 50 V to 50 V and the sensitivity becomes be 0 2 V 0 5 or 1 0 V When the button indicator is ON the active slope of the in put is changed from positive to negative Dual functions 1 2 Selection of variable sensitivity AC with 0 V trigger level or selection of variable trigger level DC with maxi mum sensitivity AC or DC coupled input NOTE AC coupling together with Auto Level results in maximum sensi
54. l 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 pre vious set up Syntax What is a Programming Command A programming command consists of a header address ing the function you want and a body instructing the func tion what to do Page 25 EXAMPLE IRGSLP POS HEADER addressing BODY switching Trigger Slope slope to positive NOTE Some programming commands consists only of the Header e g trigger command xX 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 controller 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 end a header and separator program program body between commands message bodies space comma semicolon lt linefeed gt Bs TIME A B FRUN ONJ 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 s
55. litude of the signal source until the oscil loscope indicates the sensitivity limit in the counter specifications Check that the counter is operating correctly PM 6666 OPERATORS MANUAL 44 Low Impedance Inputs 50Q If You Have a Calibrated Signal Source Adjust the signal source to the sensitivity limit of the counter Connect it directly to the input of the counter Check that the counter is operating correctly If You Don t Have a Calibrated Signal Source Use either of the following methods Method 1 Connect the output of the signal source directly to the in put of the counter Turn off AUTO and Set the counter to maximum sensitiv ity if adjustable Adjust the amplitude of the signal source to the minimum level accepted by the counter PM 6666 OPERATORS MANUAL APPENDIX 1 Disconnect the cable from the counter and connect it to the oscilloscope 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 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 connect it to the counter Turn off AUTO and set the counter to maximum sensitiv ity if adjustable
56. lling the instrument which conditions will cause SRQ Comment number is a decimal value depending on selected SRQ reasons Command MSR number Decimal Bit value Reason for SRQ 7 128 Not used 6 64 Time Out 5 32 Hardware fault 4 16 Programming error 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 be fore 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 lt number gt 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 Value if the Bit bit is 1 Example Binary Decimal word X value 7 128 0 0 6 64 1 64 Time Out 5 32 0 0 4 16 0 0 3 8 0 0 2 4 0 0 1 2 1 2 Ready to trigger 0 1 1 1 Meas result ready 67 Send MSR 67 to the counter 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 con ditions 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
57. lowing new functions Function Function Command cursor indicates Frequency B FREQ B FREQ Time interval B A TIME B A TIME A B Totalize B Manu TOTM B TOT A MAN ally Totalize B Gated TOTG B A by A Totalize B TOTS B A TOT A B Start stop by A Ratio B A RATIO B A RATIO A B Ratio RATIO C A RATIO A B Ratio C B RATIO C B RATIO A B Volt B max VMAX B VOLT A MAX MIN Volt B min VMIN B VOLT A MAX MIN A Only possible if Input C option PM 9608B is installed Don t use VMAX B or VMIN B together with COM B via A to measure the voltage on input A The re sults will be unreliable When the counter switches to LOCAL the function indi cated by the Function cursor will be selected The counter will not return to the bus only function when it returns to remote To return to the bus only function you must re program the counter The specifications of some bus only functions differ from the specifications of it s similar front panel selectable func tion See Specifications GPIB INTERFACE OPERATION Selecting Measuring Time The Measuring time can be set to any value between 10 ms and 10 s or SINGLE measuring Any value below 10 ms will be interpreted as SINGLE Values above 105 will be out of range and cause an error The program com mand is MTIME lt gt Always enter the Measuring time in seconds The entered value will be trunkated to the nearest 10 ms increment M
58. lts to the controller Se lect output mode by sending OUTM number where number is a decimal value between 0 and 4 depending on the selected output mode number High speed Output MTCXO dump format compensati on 0 OFF NORMAL ON 1 SHORT ON 2 OFF NORMAL OFF 3 OFF SHORT OFF 4 ON FOR HIGH OFF SPEED DUMP Default number is 0 when switching to local and back again the number will be reset to 0 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 Must be in the end of a program message PM 6666 OPERATORS MANUAL GPIB INTERFACE OPERATION 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 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 FFFFFFOXXXXXXXXXXE XS S 21 22 characters EXAMPLE
59. measurements s Approx 2 measurements s when AUTO trigger level is switched on Display time Normally the display time equals the set Measuring time When SINGLE is selected a display time of 0 1 seconds is used Display Hold The current measuring result is frozen on the display A new measurement starts when the RESET button is pressed Definitions LSD Displayed LSD unit value of the least significant digit displayed All calculated LSDs see Measuring Functions section should be rounded to the nearest decade 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 Freq C Period A Resolution can be 1 LSD or 2 LSD if LSD x measuring time 7 FREQ or PERIOD the resolution is 2 LSD units 80 probability Otherwise resolution is 1 LSD unit 70 probability Ratio A B Resolution be 1 LSD or 2 LSD If LSD x measuring time 10 RATIO FREQ the resolution is 2 LSD units 80 probability Otherwise resolution is LSD unit 70 probability SINGLE Period A and SINGLE Ratio A B Resolu tion equals 1 LSD unit Time A B Resolution 95 confidence level equals 1 LSD unit or 100 ns N whichever is greater PM 6666 OPERATORS MANUAL 40 SPECIFICATIONS Inaccuracy Inaccuracy i e the relative error depends on the follow ing factors r
60. ms OHz to 30 MHz 40 mVrms 30 MHz to 120 MHz 60 mVrms typ 120 MHz to 160 MHz at room temperature Pulse 60 mVp p OHz to 30 MHz 110 mVp p 30 Hz to 120 MHz sensitivity decreases to 60 mVrms at 160 MHz typically Sensitivity AC Coupled Sensitivity is selectable in 6 steps 20 mV 50 mV 100 mV 200 mV 500 mV and 1Vrms sine nominal Maximum Sensitivity 20 mVrms 20 Hz to 30 MHz 40 mVrms 30 MHz to 120 MHz sensitivity decreases to 60 mVrms typ 120 MHz to 160 MHz at room tempera ture Attenuation xl or x10 switch selectable or AUTO Trigger Slopes Positive or negative Trigger Level Range DC Coupled 51V to 51V adjustable via up down control AC Coupled OV fixed or AUTO level Trigger Level Resolution 20 mV signals within 5V 200 mV signals outside 5V Trigger Level Setting Accuracy 10mV 1 of setting AUTO Trigger Level Trigger Level on input A and B when required is automatically set to 50 of input signal amplitude Frequency Range 100 Hz to 160 MHz 120 MHz to 160 MHz with limited temperature range typical 23 5 Sensitivity 150 mVpp Trigger Indicators Tri state LED indicators On Signal above set trigger level SPECIFICATIONS Off Signal below set trigger level Blinking Triggering occurs Input Channel Selection Separate A and B or A and B common via input A Input C Option PM 9608B Frequency Range 70 MHz to 1 3 GHz Coupling AC Operating Inpu
61. n pulse duration 4 ns This input is used for Ratio A B Time A B and TOT A start stop or gated by B measurements Range Identical to Input A command At higher frequencies use 50Q termination type PM 9585 to avoid interference caused by impedance mismatch The illustration below shows which function block each of the input controls affect DC AC Switch DC Trigger level DC Trigger level DC AC Switch Figure 7 Input Circuit Block Diagram PM 6666 OPERATORS MANUAL 6666 OPERATORS MANUAL 18 OPERATING INSTRUCTIONS CONTROL OPERATING THE GPIB CODE CONTROL ATTx1 One ATTx1 x10 push ATT ON button for each of input ATT OFF A and B Switch the You must first indicator ON to select select input 10 times attenuation and with INPA or OFF to switch off the INPB attenuator 2 One SLOPE push TRGSLP POS S button for each of input TRGSLP NEG A and B Switch the You must first indicator ON to select select input negative slope and OFF with INPA or to select positive slope INPB DC One DC AC push button COUPL AC AR for each of input A and COUPL DC B Switch the indicator You must first ON to select AC and select input OFF to select DC with INPA or INPB NOTE Sensitivity can be set when AC coupled and Trigger Level when DC coupled A depression switches AUTO ON the AUTO LEVEL AUTO OFF ind
62. n calibrated you must wait an hour between removing the cover and calibrating If the counter has been switched off more than three hours you can calibreate it directly 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 using a Pozidrive No 1 screwdriver A 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 gently pull the Timer Counter out of the cover Calibration Procedure INSTALLATION Page 9 Remove the cover from the counter Allow the MTCXO to adapt the new ambient tempera gt ture See Preparations N CALIB button 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 Figure 6 Location of the CALIB Button 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 erence Fit the cover PM 6666 OPERATORS MANUAL
63. ng time indicator is switched off in TOT A MAN PM 6666 OPERATORS MANUAL 14 OPERATING INSTRUCTIONS CONTROL OPERATING THE DISPLAY GPIB CODE CONTROL Move function cursor to MAX VOLTAGE MIN VOLTAGE VMAX A FUNCTION VOLT A MAX MIN ws MOLD LeveL LEVEL VMIN A VMAX B and um VMIN B fa al possible via Bus FREQ FREQ PERIOD RATIO TIME TOT A TOT A TOTA VOLTA A C A MAN MAX MIN FUNCTION MEAS TIME is operated MTIME num MEAS in the same way as the where num DNE functions control see is the time in a page 8 seconds Range 10 ms to 10 s 0 Single MEASURING TIME Move the measuring SINGLE 02s MEAS time cursor to SINGLE TIME DISPLAY EXT AUTO READ HO BviaA REF LEVEL LEVEL MTI M E 0 10s FREQ FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A MAX MIN FUNCTION MEASURING TIME DISPLAY COMMON EXT AUTO READ 0 2 HO BviaA REF LEVEL LEVEL MTI M E 0 2 10s Move the measuring SINGLE MEAS time cursor to 0 2 TIME FREQ PERIOD RATIO TIME TOTA TOTA TOTA VOLTA A C A FUNCTION MEASURING TIME DISPLAY COMMON EXT AUTO READ 2 HO BviaA REF LEVEL LEVEL MTI M E 1 10s Move the measuring SINGLE MEAS time cursor to 1 s TIME
64. ngs TRGSLP POS ATT OFF B 18 COUPL DC COM OFF 16 TRGLVL numbers SENS 1 19 BUS Bus interface commands MSR number OUTM 16 number 15 EOI OFF SPR number As you can see the responses are the same commands as you use for normal programming So if you have to change anything 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 INPA and INPB result in a response sent as a three line messages 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 com mand in a program message AUTO or COM is switched ON the responses to INPA and INPB must be interpreted in a different way see Se lecting Input settings Terminating a Response It is not necessary to read all output lines Any program message will terminate the response 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 GPIB INTERFACE OPERATION 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 function This means that t
65. onsiderably since one cycle is measured instead of 10 The signal with the lowest frequency must always be connected to Input B Use the SLOPE buttons if you wish to measure between any other combination of slopes The Timer Counter counts the total number of pulses fed to Input A The positive slope of the Input B signal starts the totalizing and the negative slope stops it This is always a SINGLE measurement Range 0 to 1 10 pulses The Timer Counter counts the total number of pulses fed to Input A The positive slope of the first pulse on Input B starts the totalizing and the positive slope of the next pulse stops it This is always a SINGLE measurement Range 0 to 1 10 pulses The Timer Counter counts the total number of pulses fed to Input A You start and stop the totalizing with the TOTAL IZE START STOP button RESET LOCAL If you keep this button depressed for more than one second the total sum will be reset Range 0 to 1 10 pulses k on the display indicates kilo pulses 1000 and M indicates Mega pulses 1 000 000 Use the Input B SLOPE button if you wish to measure during a negative pulse on Input B k on the display indicates kilo pulses 1000 and M indicates Mega pulses 1 000 000 Use the Input B SLOPE button if you wish to measure between two consecutive negative pulses on Input B k on the display indicates kilo pulses 1000 and M indicates Mega pulses 1 000 000 The Measuri
66. op by B A Mode Event counting on input A B between two consecutive pulses on input B A Manual Mode Event counting is controlled by the START STOP button Sequential start stop counts are ac cumulated RESET closes the gate and resets the timer counter to zero Volt Max Min A Volt max min B via GPIB IEEE 488 only Range 51V to 51V Frequency Range DC and 100 Hz to 50 MHz input A dc and 100 Hz to 5 MHz input B Resolution Input signals within 5V 20 mV input sig nals outside 5V 200 mV Inaccuracy DC and 100 Hz to 12 MHz A or to 1MHz B Input sig nals within 5V 30 mV 1 96 of reading 3 of Vp p input signals outside 5V 300 mV 3 of reading 3 of Vp p Inaccuracy 12 MHz to 50 MHz A or 1MHz to 5 MHz B PM 6666 OPERATORS MANUAL SPECIFICATIONS Input signals within 5V 30 mV 10 of reading 10 of Vp p input signals outside 5V 300 mV 10 of react ing 10 of Vp p Input A and Input B Frequency Range DC Coupled DC to 160 MHz 120 MHz to 160 MHz with limited temperature range typical 23 C 5 C AC Coupled 20 Hz to 160 MHz 120 MHz to 160 MHz with limited temperature range typical 23 C 5 Minimum Pulse Duration 4 ns Coupling AC or dc Impedance 1M 35 pF Channel Input Separate A and B or common via A Maximum Voltage Without Damage 350V dc ac peak between 2 and 440 Hz falling to 8V rms at 1MHz Sensitivity DC Coupled Sine 20 mVr
67. ors X Device trigger starts a new measurement D Device clear returns to default settings BUS Output the current bus related settings ID Output identity and which options are installed A Not available in LOCAL mode Affect both inputs independent of INPA INPB his command must be placed at the end of a pro gram message PM 6666 OPERATORS MANUAL 34 GPIB INTERFACE OPERATION 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 the counter performs 500 measurements and the result of each meas urement 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 PM6666 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 7 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 lt gt Y THEN 130 160 DISP MAKE 500 MEASUREMENTS 170 OUTPUT 710 TRIG OFEMTIME 0 0UTM 4 180 190 E TIME 200 TRANSFER
68. re sults so the OUTM 4 command must always be placed at the end of the program message If Triggered Mode is ON After receiving OUTM 4 the counter waits for bus command GET before it starts NOTE The minimum time between OUTM 4 and GET is 0 ms Stopping Any programming command from the controller will end High Speed dump High speed dump is stopped inbetween two measurements 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 button 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 controller how to evaluate the twelve hex digits which represent the contents in the internal registers of the counter Formula Multiplier Hex digits Separators FM111111222222S S 15 16 characters The counter cannot signal together with the out put separator when High speed dump is selected Page 31 Hex digits All 12 digits together represent register 3 MSB 111111222222 333333333333 When the digits are divided into two groups the first six digits represents register 1 and the last six digits represent register 2 MSB MSB 111111 222222 Formula Depending on the selected measuring function
69. rruption of the protec tive ground connection inside or outside the instrument or disconnection of the pro tective 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 BNC cable to the EXT REF INPUT on the rear panel of the Timer Counter When the Timer Counter starts measuring it automatically 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 Timer Counter are normally factory installed Other op tions can be fitted when needed The options fit inside the Timer 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 in Stalled in one and the same Timer Counter PM 6666 OPERATORS MANUAL INSTALLATION 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 3 1 0 8 The 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 whe
70. t feature of PM 6666 By asking a set of queries the counter responds with its current setup The output format of these answers to the queries is identical to the program ming command format The answers can be stored and used later for reprogramming bus learn 100 DEMO PROGRAM 110 6666 AND IBM PC WITH 2201 120 GPIB INTERFACE AS CONTROLLER 130 AD 7 ADAPTOR NUMBER 140 ADDR 710 COUNTER ADDRESS 150 8 1 SYSTEM CONTROLLER 160 CALL IOINIT AD SC INIT INTERFACE Page 35 170 TIME 10 TIMEOUT AFTER 10 SECONDS 180 CALL IOTIMEOUT AD TIME 190 CLS CLEAR SCREEN 200 ASK FOR AND PRINT PROGRAM DATA 210 PRINT COUNTING SETTING 220 S FNC 230 GOSUB 520 240 1 250 550 260 85 MEAC 270 520 280 A22 290 GOSUB 550 300 S BUS 310 GOSUB 520 320 A22 330 550 340 S INPA 350 PRINT INPA 360 520 370 1 380 GOSUB 550 390 5 INPB 400 PRINT INPB 410 GOSUB 520 4200 1 430 550 440 S ID 450 PRINT 460 PRINT COUNTER TYPE 470 GOSUB 520 480 1 490 550 500 CALL IOLOCAL ADDR GO TO LOCAL 510 END 520 L LEN S LENGTH OF STRING TO SEND 530 CALL IOOUTPUTS ADDR S L OUTPUT STRING 540 RETURN 550 FORI 1TOA 560 25 570 0 580 RES SPACES 25 590 CALL IOENTERS ADDR RES MAX ACT 600 B LEFTS RESS ACT 610
71. t Voltage Range 10 mVrms to 12Vrms 70 MHz to 900 MHz 15 mVrms to 12Vrms 900 MHz to 1100 MHz 40 mVrms to 12Vrms 1100 MHz to 1300 MHz AM Tolerance 94 at max 100 kHz modulation fre quency minimum signal must exceed minimum operating input voltage requirement Input Impedance 500 nominal VSWR 1 Max Voltage Without Damage 12V rms overload protection with pin diodes External Reference Input D Input Frequency 10 MHz 0 1 MHz Coupling AC Sensitivity 500 mV rms Input Impedance Approx 3000 at 10 MHz Maximum Input Voltage 15Vrms 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 FREQ A Measuring Time 0 2 s Coupling AC on Input A DC on Input B Trigger level Auto Trigger slope Positive on A and B RESET The RESET button has three functions RESET Starts a new measurement The settings are not changed LOCAL Page 39 Makes the counter go to LOCAL operation when in remote operation unless Local Lock Out is programmed START STOP Opens closes the gate in TOTALIZE A manual mode Measuring Time measuring time of 0 25 1s 10s or SINGLE can be selected NOTE When SINGLE is selected together with PERIOD RATIO or TIME the result is a single cycle meas urement but SINGLE together with FREQUEN CY results in a fixed 3 ms Measuring time Measuring rate Approx 5
72. t have any connector you must install the GPIB interface option see installation GPIB connector Address switch UPPORTED UNCTIONS H1 AH1 T5 L4 R1 S IEEE 488 INTERFACE TALK ONLY S A 11 INCLUDED OPTIONS EXT REF INPUT VOLTAGE 9604 9608B SELECTOR PM9605 9607 O J e 10MHz 0 5 15Vrms S D 2 1 DT1 THERMAL FUSE IN MAINS TRANSFORMER Figure 8 GPIB connector and address switch the numbers above the switches indicate the sig nificance of each switch Connect the controller via an IEEE 488 cable to the bus connector If you use IEC 625 cables an adapter is avail able see ordering information at the end of this manual Giving the Counter an Address The counter must have a unique address so that the con troller can communicate with it The address is selected by setting switches to the binary equivalent of the address you want The switches are located to the right of the inter face connector The OFF position means 0 and the ON po sition means 1 PM 6666 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 7 00111 17 10001 27 11011 8 01000 18 10010 2
73. th conductor A Battery unit if ordered oscillator if ordered A GPIB interface if ordered An HF input if ordered Labels on the rear panel indicate which options are fitted in your Timer Counter INCLUDED OPTIONS V 9604 PM 9608B O PM9605 PM9607 Figure 3 Options Label on Rear Voltage Range Selection Set the Timer Counter to the local line voltage before con necting it As delivered the Timer Counter may be set to either 115 V or 230 V The setting is indicated on the volt age range selector on the rear panel IEEE 488 INTERFACE TALK ONLY INCLUDED OPTIONS EXT REF INPUT VOLTAGE PM9604 PM 9608B SELECTOR O PM 9605 9607 ___ 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 PM 6666 OPERATORS MANUAL 8 Grounding The Timer 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 Timer Counter Extension cables must always have a protective ground conductor WARNING Never interrupt the protective grounding intentionally Any inte
74. the desired separator It can be 0 26 28 31 ESC code 27 is not accepted Only one number 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 LO CAL from the front panel nor by LOCAL or Device clear from the bus 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 be tween FREQ and A indicates the input separator that you always must insert PM 6666 OPERATORS MANUAL GPIB INTERFACE OPERATION Function Command Comment Frequency A FREQ A Default Frequency C FREQ C Period A PER A Ratio A B RATIO A B Time A B TIME A B Totalize AGated TOTG by B Totalize A TOTS Start stop by B Totalize A TOTM A See Totalize Manually start stop Volt A max VMAX A Volt A min VMIN A The function cursor on the display of the counter will jump to the selected function Only possible if Input C option PM 9608B is installed Functions Accessible via Bus Only When you have a GPIB interface you will get the fol
75. tion under this guarantee is limited to have repaired or replace a product that is returned to an authorized Fluke Service Center within the guarantee period provided that Fluke determines that the product is defective and that the failure has not been caused by misuse alteration or abnormal operation Guarantee service for products installed by Fluke will be performed at the Buyer s facility at no charge within Fluke service travel area outside this area guarantee service will be performed at the Buyer s facility only upon Fluke prior agreement and the Buyer shall pay Fluke round trip travel expenses If a failure occurs send the product freight prepaid to the Service Center designated by Fluke with a description of the diffi culty At Fluke option repairs will be made or the product replaced Fluke shall return the product F O B Repair Center trans portation prepaid unless the product is to be returned to another country in which case the Buyer shall pay all shipping charges duties and taxes Fluke assume NO risk for damage in transit Disclaimer The foregoing guarantee is exclusive and is in lieu of all other guarantees expressed or implied including but not limited to any implied guarantee of merchantability fitness or adequacy for any particular purpose or use We shall not be liable for any direct indirect special incidental or consequential damages whether based on contract tort or otherwise PM 6666 OPERATORS
76. tivity and automatic trigger level setting The auto level function always sets the DC trigger level to 50 of the amplitude it does also switch on the attenuators when needed Auto level is selected simultaneously for both A and B inputs The measuring rate is reduced to about two measurements second when using Auto Level The sensitivity is decreased to 150 mVpp and the minimum frequency is 100Hz For frequency period and ratio measurements Select AC coupling and set the sensitivity so that the hyster esis band of the Timer Counter is about half the amplitude of the input signal For time measurements Select DC coupling and set the trigger level to the desired level Page 19 HINTS AND COMMENTS If Auto Level or Volt is selected the correct attenuator setting will be selected automatically You can remove any DC component with AC coupling For frequency period and ratio measurements Select AC coupling and set the sensitivity so that the hysteresis band of the Timer Counter is about half the amplitude of the input signal For time measurements Select DC coupling and set the trigger level to the desired level NOTE Auto level gives automatic trigger level setting to AC coupled inputs also Use Read Level to check what trigger levels Auto Level has selected If the sensitivity is too high the Timer Counter will be triggered by noise and interference instead of by the signal PM 6666 OPERATORS MA
77. top the totalizing and reset the counting reg isters to zero PM 6666 OPERATORS MANUAL 28 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 counter re ceives 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 result is ready One and the same measuring result 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 controller reads the measuring results then the output buff er 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 re set button Free Run Command Comment Off FRUN OFF This function is sometimes called Triggered Mode TRIG OFF gives the same result Default Free Run ON or OFF will not be indicated on the display When the counter switches to LOCAL Free Run will al ways be ON but when the counter switches back to re mote it will return to its previously programmed settings On FRUN ON 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

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