Fluke PM6681R - Manual

Finding Your Way Through This Manual You should use this Programming Manual together with the PM6680B/1/5 Operators Manual. That manual contains specifications for the counter and explanations of the possibilities and limitations of the different measuring functions. Sections The chapters in this ma...

Manual Conventions Syntax Specification Form This manual uses the EBNF (Extended Backus-Naur Form) notation for describ- ing syntax. This notation uses the follow- ing types of symbols: n Printable Characters: Printable characters such as Command headers, etc., are printed just as they are, e.g. per...

used if the command is only four charac- ters. – If the last character in the command is a digit, then this digit is appended to the shortform. Examples: Longform Shortform :MEASURE :MEAS :NEGATIVE :NEG :DREGISTER0 :DREG0 :EXTERNAL4 :EXT4 The shortform is always printed in CAPI- TALS in this manual:...

The address can also be set via a GPIB command or from the AUX MENU on the PM6680B/1/5. The set address is stored in nonvolatile memory and re- mains until you change it. Power-on When turned on, the counter starts with the setting it had when turned off. n Standby When the counter is in REMOTE mode...

n Listener Function, L4 The counter can receive programming in- structions from the controller. L4 means that it has the following functions:– Basic listener. – No listen only. – Automatic un-addressing as listener when addressed as a talker. n Service Request, SR1 The counter can call for attention...

Bus Commands for the Benchtop User 2-2 Error Code :INP:LEV 8 <level> Level can be set to between –5.1 to + 5.1 V when at- tenuator is set to 1X, and –51 to + 51 V when attenu- ator is set to 10X :INP2:COM 8 MON|OFF :INP2:IMP 8 50|1E6 :INP:FILT 8 ON|OFF Switches on or off the 100kHz LP-filter :...

Bus Commands for the Benchtop User Error Code 2-3 :SYST:PRES or * RST Presets the counter to default :ROSC:SOUR 8 INT|EXT* :ACQ:HOFF 8 ON|OFF* :TOT:GAT 8 ON|OFF* :ACQ:HOFF:TIME 8 <time> Time can be set between 200E–9 and 1.6 * :DISPL:ENAB 8 ON|OFF :TEST:CHEC 8 ON|OFF * These commands are from ...

Bus Commands for the Benchtop User 2-4 Error Code :READ? Starts a measure- ment and requests re- sult :ACQ:APER 8 <time> Time can be set to: 0.8E–6, 1.6E–6, 3.2 E–6, 6.4E–6 12.8E–6 and 50E–6 to 400 * :AVER:STAT 8 OFF|ON OFF gives SINGLE ON gives AVER- The functions in the auxiliary menu tree a...

Bus Commands for the Benchtop User Error Code 2-5 T R I G T R I G A D C - 3 0 0 M H z B S I N G L E G A T E M E N U F U N C T I O N R E S T A R T H O L D M E A S U R E M E N T S A V E R E C A L L P R O C E S S D A T A E N T R Y O F F M A X 1 2 V r m s 3 5 0 V p . 1 M . 5 0 M = L = C L E A R 0 + / - ...

Bus Commands for the Benchtop User 2-6 Error Code :FUNC 8 "TOT 8 1,2" :FUNC 8 "VOLT:MIN 8 1" :FUNC 8 "VOLT:PTP 8 1" All commands on this page are from the SENSE subsystem :FUNC 8 "VOLT:MAX 8 1" SRQ This segment is on when the instrument has sent a Service Request via ...

Bus Commands for the Benchtop User Error Code 2-7 * This command is from the SENSE subsystem :ROSC:SOUR 8 INT|EXT * Input 4 :OUTP 8 ON|OFF OUTP:SCAL 8 <scaling factor> :SYST:COMM:GPIB:ADDR 8 <Address> <Address> can be between 1 and 30 I N P U T A I N P U T B I N P U T C RE AR P A N...

Default settings (after *RST) PARAMETER VALUE/ SETTING Input A: Trigger level AUTO Impedance 1 M Ω Manual Trigger level (Controlled by autotrigger) 0V Manual Attenuator (Controlled by autotrigger) 1X Coupling AC Trigger slope Pos Filter OFF Input B: Trigger level AUTO Impedance 1 M Ω Manual Trigger ...

How does SCPI Work in the Instrument? The functions inside an instrument that control the operation provide SCPI com- patibility. Figure 3-3 shows a simplified logical model of the message flow inside a SCPI instrument.When the controller sends a message to a SCPI instrument, roughly the following h...

State Purpose IDLE Wait for messages READ Read and execute mes- sages QUERY Store responses to be sent SEND Send responses RE- SPONSE Complete sending re- sponses DONE Finished sending re- sponses DEADLOCK The device cannot buffer more data Action, Reason Untermin- ated, The controller attempts to r...

Remote Local Protocol n Definitions Remote Operation When an instrument operates in remote, all local controls, except the local key, are disabled. Local Operation An instrument operates in local when it is not in remote mode as defined above. Local Lockout In addition to the remote state, an instru...

The communication between the system controller and the SCPI instruments con- nected to the GPIB takes place through Program and Response Messages. A Pro- gram Message is a sequence of one or more commands sent from the controller to an instrument. Conversely, a Response Message is the data from the...

Most controller programming languages send these terminators automatically, but allow changing it. So make sure that the terminator is as above.Example of a terminated program mes- sage: program message unit terminator program message unit This program message consists of two message units. The unit...

Notation Habit in Command Syntax To clarify the difference between short and longform, the shortform in a syntax specification is shown in upper case let- ters and the remaining part of the longform in lower case letters.Notice however, that this does not specify the use of upper and lower case char...

Command Tree Command Trees like the one below are used to document the SCPI command set in this manual. The keyword (mnemonic) on the root level of the command tree is the name of the subsystem. The follow- ing example illustrates the Command Tree of the INPut1 subsystem. + The keywords placed in sq...

This is the command where: INPut:EVENt is the header path and :HYSTeresis is the first leaf-node and LEVel is the second leaf node because LEVel is also a leaf-node under the header path INPut:EVENt. + There is no colon before LEVel! Parameters Numeric Data Decimal data are printed as numerical valu...

n Example SEND → :SYST:TOUT 8 ON or :SYST:TOUT 8 1 This switches timeout monitoring on. A query, for instance :SYSTem:TOUT? , will return 1 or 0; never ON or OFF. Expression Data You must enclose expression program data in parenthesis (). Three possibilities of expression data are as follows:– <n...

Macros A macro is a single command, that repre- sents one or several other commands, de- pending on your definition. You can define 25 macros of 40 characters in the counter. One macro can address other macros, but you cannot call a macro from within itself (recursion). You can use variable paramete...

n Macros with Arguments You can pass arguments (variable param- eters) with the macro. Insert a dollar sign ($) followed by a single digit in the range 1 to 9 where you want to insert the pa- rameter. See the example below.When a macro with defined arguments is used, the first argument sent will rep...

Retrieve a Macro n * GMC? Get Macro Contents Query This query gives a response containing the definition of the macro you specified when sending the query. Example using the above defined macro: SEND → * GMC? 8 ‘LIMITMON’ READ ← #292:CALC:STAT ON;:CALC:LIM:STAT ON; :CALC:LIM:LOW:DATA $1;STAT 8 ON; :...

Status Reporting System Introduction Status reporting is a method to let the controller know what the counter is do- ing. You can ask the counter what status it is in whenever you want to know. You can select some conditions in the counter that should be reported in the Sta- tus Byte Register. You c...

Error Reporting The counter will place a detected error in its Error Queue. This queue is a FIFO (First-In First-Out) buffer. When you read the queue, the first error will come out first, the last error last.If the queue overflows, an overflow mes- sage is placed last in the queue, and fur- ther err...

Initialization and Resetting Reset Strategy There are three levels of initialization:– Bus initialization – Message exchange initialization – Device initialization n Bus Initialization This is the first level of initialization. The controller program should start with this which initializes the IEEE...

Introduction Each program example in this chapter is written for IBM-PC compatible comput- ers equipped with the National Instru- ments PC-IIA. In addition to that, many of the examples are written in both ‘GW-BASIC’ and ‘C’.Even if you do not have these interface board or use these computer languag...

GW-Basic for National Instruments PC-IIA Setting up the interface All these programs start with a declaration containing three lines of setup information for the interface. This declaration must be merged with the programs prior to running them. The declaration is printed below, but it is also avail...

3. Frequency Profiling Frequency profiling visualizes frequency variations for a certain time. This program gives an output file called: PROFILE.DAT. If this file is imported to a spreadsheet program, for instance Excel, you can create a graph like the one in the figure below. 50 ‘ 60 OPEN “O”, 1, “...

6. Statistics (Only for PM6680B and PM6681)In this example, the counter makes 10000 measurements and uses the statistical func- tions to determine MAX, MIN, MEAN, and Standard Deviation. All four results are sent to the controller. 50 CNTNAME$ = “DEV10" 60 CALL IBFIND (CNTNAME$, CNT%) 70 ‘ 80 ‘ ...

‘C’ for National Instruments PC-IIA Programming Examples ‘C’ for National Instruments PC-IIA

2. REAL Data Format This program uses the REAL data format to speed up the measurement./* IEEE 488.2 binary real format follows the ‘little-endian’ format with the most-significant byte first and the least-significant byte last. Intel processors use the ‘big-endian’ format, with the least-significan...

Introduction The figure below shows how the instru- ment functions are categorized. This in- strument model is fully compatible with the SCPI generalized instrument model.The generalized SCPI instrument model, contains three major instrument catego- ries as shown in the following table: Function Ins...

Measurement Function Block The measurement function block converts the input signals into an internal data for- mat that is available for formatting into GPIB bus data. The measurement func- tion is divided into three different blocks: INPut, SENSe and CALCulate. See Figure 5-3. n INPut The INPut bl...

Other Subsystems In addition to the major functions (sub- systems), there are several other subsys- tems in the instrument model. The different blocks have the following functions. n CALibration This subsystem controls the calibration of the interpolators used to increase the res- olution of the CNT...

MEASurement Function In addition to the subsystems of the in- strument model, which controls the in- strument functions, SCPI has signal-oriented functions to obtain mea- surement results. This group of MEASure functions has a different level of compati- bility and flexibility. The parameters used w...

READ? starts the acquisition and returns the result.This sequence does the same as the MEA- Sure command, but now it is possible to insert commands between CONFigure and READ? to adjust the setting of a par- ticular function (called fine tuning). For instance, you can set an input attenuator at a re...

Introduction Although SCPI is intended to be self ex- planatory, we feel that some hints and tips on how to use the different subsys- tems may be useful. This chapter does not explain each and every command, but only those for which we believe extra explanations are necessary. 6-2 Using the Subsyste...

Calculate Subsystem The calculate subsystem processes the measuring results. Here you can recalcu- late the result using mathematics, make statistics (not PM6685) and set upper and lower limits for the measuing result that the counter itself monitors and alerts you when the limits are exceeded. n Ma...

Calibration Subsystem The interpolators used to increase the res- olution of the measurement result in the counter must be calibrated to maintain the highest possible accuracy of the counter.The calibration method of the PM6681 differs from the method used in PM6680B and PM6685. n PM6680B, PM6685 Th...

Configure Function The CONFigure command sets up the counter to make the same measurements as the MEASure query, but without initi- ating the measurement and fetching the result. Use configure when you want to change any parameters before making the measurement.Read more about Configure under MEA- S...

Format Subsystem Time Stamp Readout Format It is not trivial to decide how time stamped measurements are to be pre- sented on the bus. If the ‘ADIF’ format defined by SCPI is adopted, it should be adopted for all data readout, and switched on and off by the already standardized :FORMat:DINTerchange ...

Input Subsystems PM6685 Using the Subsystems Input Subsystems 6-7 INP:IMP 1E6 INP:SLOP POS INP:SLOP NEG INP:FILT OFF INP:FILT ON A 1 INP:IMP 50 0V Trigger points Reset points INP:HYST <value in Volt> t INP:LEV <value in Volt> Comparator Figure 6-1 Summary of PM6685 input amplifier settin...

Measurement Function The Measure function group has a differ- ent level of compatibility and flexibility than other commands. The parameters used with commands from the Measure group describe the signal you are going to measure. This means that the Measure functions give compatibility between in- st...

n Example: SEND → CONFigure:FREQ 8 2E6,1 2E6 is the expected value 1 is the required resolution (1Hz) SEND → INPut:IMPedance50 8 OHM Sets input impedance to 50 Ω SEND → READ? Starts the measurement and returns the result. CONFigure;INITiate;FETCh? The READ? command can be divided into the INITiate c...

Output Subsystem The analog output is turned off as a de- fault. You turn it on/off and set the scal- ing factor under ANALOG OUT in the aux menu. Scaling Factor The scaling factor has two functions:– Its exponent selects which digits to output on the analog output. – Its value sets what reading sho...

– This is the value that will determine the output voltage; .00 will give 0 V and .99 will give 5 V. This means that the reading will give: .67890*5=3.3945 V. This is ouput as 3.38 V due to the 0.02 V resolution of the analog output. n Resolution The analog output range is 0 to 5 V in 250 steps, so ...

Sense Command Subsystems Depending on application, you can select different input channels and input charac- teristics. n Switchbox In automatic test systems, it is difficult to swap BNC cables when you need to mea- sure on several measuring points. With PM6680B/1 you can select from three different...

Status Subsystem Introduction Status reporting is a method to let the controller know what the counter is do- ing. You can ask the counter what status it is in whenever you want to know.You can select some conditions in the counter that should be reported in the Sta- tus Byte Register. You can also ...

Example: The counter answers 40 when you ask for the contents of the Standard Event Status Register. – Convert this to binary form. It will give you 101000. – Bit 5 is true showing that a command error has occurred. – Bit 3 is also true, showing that a device de- pendent error has occurred. Use the ...

request, it may regularly test the SRQ-line, it may regularly make serial poll or *STB?, or the controller may not react at all. The preferred method is to use SRQ because it presents a minimum of disturbance to the measurement pro- cess. Selecting Summary Message to Gen- erate SRQ The counter does ...

as long as there is unfetched data in any of the status event registers.– The Requested Service bit, RQS, is set true when a service request has been signalled. If you read the status byte via a Serial Poll, bit 6 represents RQS. Reading the status byte with a serial poll will set the RQS bit false,...

– *ESR? Reads the Standard Event Status register – :STATus:OPERation? Reads the Operation Status Event register – :STATus:QUEStionable? Reads the Questionable Status Event register – :STATus:DREGister0? Reads Device Event register When you read these registers, you will clear the register you read a...

– When you find it, check which bits in the Status Byte Register are true. – Let’s say that bit 7, OPR, is true. Then read the contents of the Opera- tion Status Register. In this register you can see what caused the SRQ. – Take appropriate actions depending on the reason for the SRQ. Standard Statu...

ESR? Reading and clearing the event register of the Standard Event structure. SCPI-defined Status Registers CNT-8X has two 16-bit SCPI-defined status structures: The operation status and the questionable data structure. These group is 16-bits wide while the status byte and the standard status groups...

Questionable Data/Signal Status Group This group reports when the output data from the CNT-8X may not be trusted. Bit 14 (weight 16384) — Unexpected Parameter (UEP) This bit shows that CNT-8X has received a parameter that it cannot execute, al- though the parameter is valid according to SCPI. This m...

Device-defined Status Structure CNT-8X has one device-defined status structure called the Device Register 0. It summarizes this structure in bit 0 of the status byte. Its purpose is to report when the measuring result has exceeded pre- programmed limits. Using the Subsystems Status Subsystem 6-25 Lo...

You set the limits with the following commands in the calculate subsystem. :CALCulate:LIMit:UPPer and :CALCulate:LIMit:LOWer An example on how to use limit monitor- ing is available in Chapter 4, ‘Program Examples.’ Bit Definition Bit 2 (weight 4) — Monitor of Low Limit This bit is set when the low ...

Trigger/Arming Subsystem The SCPI TRIGger subsystem enables syn- chronization of instrument actions with specified internal or external events. The following list gives some examples. Instrument Action Some examples of events to synchronize with are as follows:– measurement – bus trigger – external ...

This trigger configuration is sufficient for most instruments. More complex instru- ments, such as the CNT-8X, have more ARM layers.The ‘Wait for TRIG’ event-detection layer is always the last to be crossed be- fore instrument actions can take place. Structure of the IDLE and INITIATED States When y...

layer). This delay can be programmed by using the <layer>:DELay command. n Backward Traversing an Event-detection Layer The number of times a layer event has to initiate a device action can be pro- grammed by using the <layer>:COUNt command. For example: :TRIGger:COUNt 3 causes the in- s...

Using the Subsystems 6-30 Trigger/Arming Subsystem E v e n t d e t e c t i o n < l a y e r > : S O U R c e I M M e d i a t e B U S S e l e c t S o u r c e E v e n t d e t e c t i o n l a y e r L a y e r l o o p c o u n t e r = 0 E v e n t d e t e c t i o n : S L O P e < l a y e r > : S O...

Introduction The CNT-8X counters can complete a measurement cycle in many different ways, each with its own advantage. This means that your first step is to select a ba- sic “measurement scenario” based on the requirements of the measurement. This chapter contains some measurement sce- narios that y...

*OPC reports when operation is com- plete, via the Status Subsystem described on page 6-14. Rough Trigger Subsystem Description The trigger subsystem is the functional part of the CNT-8X that controls the start and stop of measurements. This is the function that the controller interacts with when it...

Some Basic Commands Here follows a description of some basic CNT-8X commands that control the mea- surement sequence. CONFigure The CONFigure command sets up the counter to do the measurement specified by the parameters of the command. The command gives a limited number of pa- rameter options such a...

Examples: – Get one measurement: FETCh? – Get 100 measurements: FETCh:ARRay? 8 100 + The number of measurements is defined by the setting of the ARM and TRIG counters. The ARM counter can be set directly by the :CONF and :MEAS commands. The :FETCh:ARRay? query pa- rameter only decides how many measu...

Basic Measurement Method A basic measurement method for a sys- tem composed of signal sources, measur- ing object, and measuring devices will be a simple step-by-step procedure. This procedure goes as follows:Step 1: Set up signal sourcesStep 2: Set up measurement devicesStep 3: Trigger measurement ...

the counter by yourself. This is primarily why we recommend the READ? query. Block Synchronized Measurements In the block synchronized mode, the con- troller only starts a sequence of measure- ments. The counter then measures, without any controller intervention, at the highest possible speed. It “d...

interpolators by using the CAL:INT:AUTO ONCE command. Block Measurements When dumping measurement results into the internal memory, it is important to program the arming and triggering coun- ters in the best way. For maximum mea- surement rate use the block armed mode. To do this set: :ARM:STARt:LAY...

Supervising a Process One typical use of a counter in the indus- try is to measure a parameter and alert the adjusting machinery when the parameter gets close to the correct value. The ma- chinery now slows down for an accurate final adjustment of the parameter, and stops the adjustment procedure wh...

Speed Summary The following table summarizes the time that can be gained when fine tuning the measurement process.The normal dead time between frequency measurements is approximately as fol- lows: 48.8 ms for the PM6680B. 85 ms for the PM6681. 75 ms for the PM6685. If you should read out the measuri...

How to Measure Fast Speed Summary 7-13 Block Synchronized Measurements (:ARM:STARt:LAYer:COUNt 1 and TRIG:COUNt <N>) Speed Improvement Actions Dead Time Between Measurements CAL:INT :AUT O OFF Display OFF Realtime calculations OFF ([SENS]:INT:FORM PACK) Low resolution ([SENS]:ACQ:RES LOW) PM66...

Calculating the Measurement Speed When opimizing your program for speed, add the measuring time you use to the dead time, and subtract the time gain for the timesaving commands you intend to use; all times should be expressed in sec- onds: 1 Meas time DeadTime TimeGain . + - = å = number of measurem...

How to Measure Fast Speed Summary 7-15 Timesaving Com- mands Time Gain in ms Sacrifice PM6680B PM6681 PM6685 Freq Freq Freq FREQ:RANG:LOW 8 MAX (23) (23) 10kHz lower freq. limit for AUTO. ThisTimesaving is only possible whenAUTO is on. (55) 50kHz lower freq. limit for AUTO. ThisTimesaving is only po...

Single “Speed Switch” Command for PM6680B/85 Since many parameters must be set to get the highest measuring speed, it is simpler if you use the macro function:Send the following lines to turn on mac- ros; define one macro called FASTFREQ and one macro called SLOWFREQ . SEND → *EMC 8 1 SEND → *DMC 8 ...

Command Errors Error Number Error Description Description/Explanation/Examples 0 No error –100 Command error This is the generic syntax error for devices that can- not detect more specific errors. This code indicates only that a Command Error defined in IEEE-488.2, 11.5.1.1.4 has occurred. –101 Inva...

CNT-8X Device specific errors (leading 1 only for PM6681) Error Number Error Description description/explanation/examples (1)214 Hash table overflow The hash table was too small to hold all mnemon- ics. Ordinarily indicates a failure to read (RAM or ROM) correctly. Contact your local service center....

9-2 Command Reference This page is intentionally left blank.

9-4 Command Reference :ABORt PM6680B/81/85 Abort Measurement The ABORt command terminates a measurement. The trigger subsystem state is set to “idle-state”. Type of command: Aborts all previous measurements if * WAI is not used. Complies to standards: SCPI 1991.0, confirmed.

Command Reference 9-5 [ :LAYer [ 1 ] ]:DELay 8 <Numeric value> | MIN | MAX (Only PM6680B / PM6681) :ECOunt 8 <Numeric value> | MIN | MAX (Only PM6680B / PM6681) :SLOPe 8 POSitive | NEGative :SOURce 8 EXTernal2 | EXTernal4 | IMMediate | TIMerf Arming Subsystem :ARM[ :STARt / :SEQuence [ 1...

9-6 Command Reference :ARM :COUNt PM6680B/81/85 8 «<Numeric value>|MIN|MAX» No. of Measurements on each Bus arm This count variable controls the upward exit of the “wait-for-bus-arm” state ( :ARM:STARt:LAY1 ). The counter loops the trigger subsystem downwards COUNt number of times before it ex...

Command Reference 9-7 :ARM :DELay PM6680B/81/85 8 «<Numeric value> | MIN | MAX» Delay after External Start Arming This command sets a delay between the pulse on the arm input and the time when the counter starts measuring. The delay is only active when the following is se- lected: :ARM:STARt:S...

9-8 Command Reference :ARM :LAYer2 PM6680B/81/85 Bus Arming Override This command overrides the waiting for bus arm, provided the source is set to bus. When this command is issued, the counter will immediately exit the “wait-for-bus- arm” state.The counter generates an error if it receives this comm...

Command Reference 9-9 :ARM :SLOPe PM6680B/81/85 8 «POSitive|NEGative» External Arming Start Slope Sets the slope for the start arming condition. Returned format: POS|NEG ¿ Example: SEND ® :ARM:SLOP 8 NEG ¿ *RST condition: POS Complies to standards: SCPI 1991.0, confirmed. :ARM :SOURce PM6680B/81/85 ...

9-10 Command Reference :ARM :STOP :DELay PM6680B PM6681 8 «<Numeric value> | MIN | MAX» Delay after External Stop Arming This command sets a delay between stop slope of the pulse on the arm input and the time when the counter stops measuring. The delay is only active when the fol- lowing is se...

Command Reference 9-11 :ARM :STOP :SLOPe PM6680B/81/85 8 «POSitive | NEGative» External Stop Arming Slope Sets the slope for the stop arming condition. Returned format: POS|NEG ¿ Example: SEND ® :ARM:STOP:SLOP 8 NEG ¿ *RST condition: POS Complies to standards: SCPI 1991.0, confirmed. :ARM :STOP :SOU...

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Command Reference 9-13 Calculate Subsystem :CALCulate :STATe 8 ON|OFF :DATA?:IMMediate:MATH [:EXPRession] 8 <Numeric expression> :STATe 8 ON|OFF :AVERage [:STATe] 8 ON|OFF :TYPE 8 MIN|MAX|SDEViation|MEAN :COUNt 8 <Numeric value>|MIN|MAX :LIMit [:STATe] 8 ON|OFF :UPPer [:DATA] 8 <Numer...

9-14 Command Reference :CALCulate :AVERage :COUNt PM6680B PM6681 8 < No. of samples> Sample Size for Statistics Sets the number of samples to use in statistics sampling. Parameters: <No. of samples> is a number in the range of 1 to 65535. Returned format: < No. of samples> ¿ *RST c...

Command Reference 9-15 :CALCulate :AVERage :TYPE PM6680B PM6681 8 «MAX|MIN|MEAN|SDEViation» Statistical Type Selects the statistical function to be performed. + You must use :CALC:DATA? t o read the result of statistical operations. :READ?, :FETC? will only send the results that the statistical oper...

9-16 Command Reference :CALCulate :IMMediate PM6680B/81/85 Recalculate Data This event causes the calculate subsystem to reprocess the statistical function on the sense data without reacquiring the data. Query returns this reprocessed data. + This command is not very useful in PM6685, but is accepte...

Command Reference 9-17 :CALCulate :LIMit :FAIL? PM6680B/81/85 Limit Fail Returns a 1 if the limit testing has failed (the measurement result has passed the limit), and a 0 if the limit testing has passed.The following events reset the fail flag: – Power-on – * RST – A :CALC:LIM:STAT OFF ® :CALC:LIM:...

9-18 Command Reference Calculate :CALCulate :LIMit :LOWer :STATe PM6680B/81/85 8 <Boolean> Check Against Lower Limit Selects if the measured value should be checked against the lower limit. Parameters <Boolean> = ( 1/ON | 0/OFF ) Returned format: 1| 0 ¿ *RST condition: 0 Complies to stan...

Command Reference 9-19 :CALCulate :LIMit :UPPer :STATe PM6680B/81/85 8 <Boolean> Check Against Upper Limit Selects if the measured value should be checked against the upper limit. Parameters <Boolean> = ( 1/ON | 0/OFF ) Returned format: 1| 0 ¿ *RST condition: 0 Complies to standards: SCP...

9-20 Command Reference :CALCulate :MATH PM6685 8 (<expression>) Select Mathematical Expression Defines the mathematical expression used for mathematical operations. This func- tion equals the nulling function from the front panel. + The data type <expression data> must be typed within pa...

Command Reference 9-21 :CALCulate :MATH PM6680B PM6681 8 (<expression>) Select Mathematical Expression Defines the mathematical expression used for mathematical operations. This func- tion equals the nulling function from the front panel. + The data type <expression data> must be typed w...

9-22 Command Reference Calculate :CALCulate :STATe PM6680B/81/85 8 <Boolean> Enable Calculation Switches on/off the complete post-processing block. If disabled, neither mathemat- ics or limit-monitoring can be done. Parameter <Boolean> = ( 1/ON | 0/OFF ) SEND ® :CALC:STAT 8 1 Switches on...

Command Reference 9-23 Calibration Subsystem :CALibration :INTerpolator :AUTO 8 <Boolean>|ONCE (Only PM6680B, PM6685) + PM6681 has factory calibrated interpolators, and calibration cannot be changed by the operator. Calibration of the PM6681 input hysteresis is done in the Diagnostis subsystem...

9-24 Command Reference :CALibration :INTerpolator :AUTO PM6680B/85 8 <Boolean>| ONCE Calibration of Interpolator The PM6680B/85 are reciprocal counters that uses an interpolating technique to increase the resolution. In time measurements, for example, interpolation in- creases the resolution f...

Command Reference 9-25 Configure Function Set up Instrument for Measurement :CONFigure [:SCALar]<Measuring Function> 8 <Parameters>,(<Channels>)] :ARRay<Measuring Function> 8 (<Array Size>)[,<Parameters>,(<Channels>)] + The array size for :MEASure and :CONFi...

9-26 Command Reference :CONFigure :<Measuring Function> PM6680B/81/85 [ 8 <parameters>[,(<channels>)]] Configure the counter for a single measurement Use the configure command instead of the measure query when you want to change other settings, for instance, the input settings befo...

Command Reference 9-27 :CONFigure :ARRay :<Measuring Function> 80B/81/85 8 (<array size>)[,<parameters> [,(<channels>)]] Configure the counter for an array of measurements The :CONFigure:ARRay command differs from the :CONFigure command in that it sets up the counter to perfo...

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Command Reference 9-29 Diagnostics Subsystem :DIAGnostic :CALibration :INPut[1] :HYSTeresis 8 OFF | ONCE :INPut2 :HYSTeresis 8 OFF | ONCE

9-30 Command Reference Fetch :DIAGnostic:CALibration:INPut[1|2]:HYSTeresis 81 8 «OFF | ONCE» Input comparator hysteresis calibration These two commands measure and save the hysteresis levels of the input com- parator. This makes it possible to achieve a trig level accuracy of 2.5 mV, which is import...

Command Reference 9-31 Display Subsystem :DISPlay :ENABle 8 ON OFF

9-32 Command Reference :DISPlay :ENABle PM6680B/81/85 8 < Boolean > Display State Turns On/Off the updating of the entire display section. This can be used for secu- rity reasons or to improve the GPIB speed, since the display does not need to be updated. Turning off the display reduces the de...

Command Reference 9-33 Fetch Function :FETCh [:SCALar]?:ARRay? 8 <Array Size>|MAX

9-34 Command Reference :FETCh? PM6680B/81/85 Fetch One Result The fetch query retrieves one measuring result from the measurement result buffer of the counter without making new measurements. Fetch does not work unless a measurement has been made by the :INITiate , :MEASure? , or :READ? com- mands.I...

Command Reference 9-35 :FETCh :ARRay? PM6680B/81/85 8 «<fetch array size>|MAX» Fetch an Array of Results :FETCh:ARRay? query differs from the :FETCh? query by fetching several mea- suring results at once.An array of measurements must first be made by the commands. :INITiate, :MEASure:ARRay? or...

9-36 Command Reference Returned format: <data>[,<data>] ¿ The format of the returned data is determined by the format commands :FORMat and :FORMat:FIXed . Example: If :MEAS:ARR:FREQ? 8 (4) gives the results 1.1000,1.2000,1.3000,1.4000 :FETC:ARR 8 2 fetches the results 1.1000,1.2000 :FETC...

Command Reference 9-37 Format Subsystem :FORMat [:DATA] 8 ASCii REAL[, <Numeric value> | AUTO] :FIXed 8 ON OFF :SREGister 8 ASCii | BINary | HEXadecimal | OCTal :TINFormation[:STATe] 8 <Boolean>

9-38 Command Reference :FORMat PM6680B/85 8 «ASCii|REAL» Response Data Type Sets the format in which the result will be sent on the bus. Parameters ASCii will send the measurement result in ASCii form.<sign><mantissa value>E<sign><expo- nent value> <sign> = + or – <m...

Command Reference 9-39 :FORMat :FIXed PM6680B/81/85 8 <Boolean> Response Data Format Sets the ASCii format to fixed. This results in the following response format: <sign><mantissa value>E<sign><exponent value> Where: <sign> = +|– <mantissa value> = 12 digits...

9-40 Command Reference :FORMat :TINFormation PM6681 8 Boolean Timestamping On/Off Timestamping;On/Off This command turns on/off the time stamping of measurements. Time stamping is always done at the start of a measurement with a resolution of 125 ns, and is saved in the measurement buffer together w...

Command Reference 9-41 Initiate Subsystem :INITiate [:IMMediate ]:CONTinuous 8 ON | OFF

9-42 Command Reference :INITiate PM6680B/81/85 Initiate Measurement The :INITiate command initiates a measurement. Executing an :INITiate com- mand changes the counter’s trigger subsystem state from “idle-state” to “wait-for-bus-arm-state” (see Figure 6-15). The trigger subsystem will continue to th...

Command Reference 9-43 n INPUT B (Not PM6685) :INPut2 :ATTenuation 8 <Numeric value>|MIN|MAX (1|10) :COUPling 8 AC|DC :IMPedance 8 <Numeric value>|MIN|MAX [:EVENt] :LEVel 8 <Numeric value>|MIN|MAX :AUTO 8 ON|OFF|ONCE :SLOPe 8 POS|NEG :COMMon 8 ON|OFF n INPUT E :INPut4 [:EVENt] :SLO...

9-44 Command Reference :INPut«[1]|2» :ATTenuation PM6680B PM6681 8 «<Numeric value>|MAX|MIN» Attenuation Attenuates the input signal with 1 or 10. The attenuation is automatically set if the input level is set to AUTO. Parameters: <Numeric values> â 5, and MIN gives attenuation 1. <Nu...

Command Reference 9-45 :INPut :HYSTeresis PM6685 8 «<Decimal data>|MAX |MIN» Sensitivity The sensitivity setting on the front panel is called HYSTeresis from the bus. The range is 27.12 mV to 75.4 V. This setting has no effect unless autosensitivity is turned off, see the following page.Note t...

9-46 Command Reference :INPut :HYSTeresis :AUTO PM6685 8 «<Boolean>|ONCE» Auto Sensitivity AUTO from the front panel turns on both auto sensitivity (hysteresis) and auto waveform compensation(trigger level). From the bus there are two commands, one for auto hysteresis and one for auto trigger ...

Command Reference 9-47 :INPut«[1]|2» :IMPedance PM6680B/81/85 8 «<Decimal data>|MAX|MIN» Input Impedance The impedance can be set to 50 W or 1 M W . Parameters MIN or <Decimal data> that rounds off to 50 or less, sets the input impedance to 50 MAX or <Decimal data> that rounds off ...

9-48 Command Reference :INPut :LEVel PM6685 8 «<Decimal data>|MAX|MIN» Waveform compensation The three-position waveform compensation on the front panel is not available from the bus. Instead, you can set the trigger level, that is, the level on which the hysteresis band is centered. How to se...

Command Reference 9-49 :INPut :LEVel :AUTO PM6680B PM6681 8 «<Boolean>|ONCE» Autotrigger If set to AUTO, the counter automatically controls both the trigger level and the at- tenuation 1 . If you have a stable amplitude, use the :AUTO 8 ONCE , and the autotrigger will determine the trigger lev...

9-50 Command Reference :INPut :LEVel :AUTO PM6685 8 «<Boolean>|ONCE» Autotrigger:INPut:AUTO? If auto is on, the counter automatically controls the trigger level 1 and the hyster- esis. If you have a stable amplitude, use the :AUTO ONCE , and auto will determine the trigger level once, and then...

Command Reference 9-51 :INPut«[1]|2|4» :SLOPe PM6680B/81/85 8 «POS|NEG» Trigger Slope Selects if the counter should trigger on a positive or a negative transition. Selecting negative slope is useful when measuring negative pulse width and negative duty cycle.When you select negative slope, the count...

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Command Reference 9-53 Measurement Function Set up the Instrument, Perform Measurement, and Read Data :MEASure [:SCALar]<Measuring Function>? [<Parameters>][,(<Channels>)] :ARRay<Measuring Function>? 8 (<Array Size>)[,<Parameters>][,(<Channels>)] :MEMory? [&...

9-54 Command Reference PM6680B PM6681 :MEASure|:CONFigure [:VOLTage] [:SCALar] :FREQuency [:CW]? [ _ [<expected value>[,<resolu- tion>],][( @1 |@2|@3|@4|@5|@6|@7)]] :RATio? [ _ [<exp. value>[,<resol.>],][( @1 |@2|@3|@4),(@1| @2 |@3|@4)]] :BURSt? [ _ [<exp. value>[,<r...

Command Reference 9-55 PM6685 :MEASure|:CONFigure [:VOLTage] [:SCALar] :FREQuency [:CW]? [ 8 [<expected value>[,<resolu- tion>]][,( @1 |@3|@4|@5|@6)]] :RATio? [ 8 [<exp. value>[,<resol.>]][,( @1 |@3|@4|@5|@6), (@1|@3| @4|@5|@6 )]] :BURSt? [ 8 [<expected value>[,<reso...

9-56 Command Reference :MEASure :<Measuring Function>? PM6680B/81/85 [ 8 [<parameters>][ ,(<channels>)]] Make one measurement The measure query makes a complete measurement, including configuration and readout of data. Use measure when you can accept the generic measurement without...

Command Reference 9-57 :MEASure :ARRay :<Measuring Function>? 80B/81/85 [ 8 (<array size>)[,[<parameters>] [,(<channels>)]] Make an array of measurements The :MEASure:ARRay query differs from the :MEASure query in that it performs the number of measurements you decide in the ...

9-58 Command Reference :MEASure:MEMory<N>? PM6681 Memory Recall, Measure and Fetch Result Use this command when you want to measure several parameters fast . :MEAS:MEM1? recalls the contents of memory 1 and reads out the result, :MEAS:MEM2? recalls the contents of memory two and reads out the ...

Command Reference 9-59 :MEASure_«:DCYCle/:PDUTycycle» PM6680B/81/85 [ 8 [<threshold>] [,(@«1|2|4|6»)]] Positive Duty Cycle Traditional duty cycle measurement is performed. That is, the ratio between the on time and the off time of the input pulse is measured. Parameters <threshold> param...

9-60 Command Reference (@5) means input A prescaled by 2 (@6) means the internal reference @7) means input A with the variable hysteresis mode (Only PM6680B and PM6681) If you omit the channel, the instrument measures on input A (@1). 1 The A input is always prescaled by 2 when measuring Frequency A...

Command Reference 9-61 :MEASure :FREQuency :BURSt? PM6680B/81/85 [ 8 [<expected value>[,<resolution>]] [,<(@«1|2|3|4|5|6|7»)>]] Burst Carrier Frequency Measures the carrier frequency of a burst. The burst duration must be less than 50% of the pulse repetition frequency (PRF).How to...

9-62 Command Reference :MEASure :FREQuency :PRF? PM6680B/81/85 [ 8 [<exp. val.>[,<res.>]][,<(@«1|2|3|4|5|6|7»)>]] Pulse Repetition Frequency Measures the PRF (Pulse Repetition Frequency) of a burst signal.The burst dura- tion must be less than 50% of the pulse repetition frequency ...

Command Reference 9-63 :MEASure :FALL :TIME? PM6680B PM6681 [ 8 [<lower threshold> [,<upper threshold>[,<expected value>[,<resolution>]]]] [,(@1)]] Fall-time The transition time from 90% to 10% of the signal amplitude is measured.The measurement is always a single measurement...

9-64 Command Reference :MEASure [:VOLT] :MAXimum? PM6680B PM6681 [ 8 («@1|@2»)] Positive Peak Voltage This command measures the positive peak voltage with the input DC coupled. Parameters: («@1|@2») is the channel to measure on (@1) means input A (@2) means input B Complies to standards: SCPI 1991.0...

Command Reference 9-65 :MEASure :NWIDth? PM6680B/81/85 [ 8 [<threshold>] [,<(@«1|2|4|6»)>]] Negative Pulse Width A negative pulse width measurement is performed.This is always a single measurement. If you need an average pulse width mea- surement, use the :SENSe subsystem instead. Parame...

9-66 Command Reference :MEASure_«:PDUTycycle/ :DCYCle»? PM6680B/81/85 [ 8 [<threshold>] [,(@«1|2|4|6»)]] Positive duty cycle: Duty Factor Traditional duty cycle measurement is performed. That is, the ratio between the on time and the off time of the input pulse is measured. Parameters <thre...

Command Reference 9-67 :MEASure :PERiod? PM6680B/81/85 [ 8 [<expected value> [,<resolution>]][,<(@«1|2|3|4|5|6|7»)>]] Period A traditional period measurement is performed.The <expected value> and <resolution> are used to calculate the Measurement Time ( [:SENSe]:ACQuisi...

9-68 Command Reference :MEASure [:VOLT] :PTPeak? PM6680B PM6681 [ 8 (@«1|2»)]. Peak-to-Peak Voltage This command make measures the peak-to-peak voltage with the input DC cou- pled. Parameters: (@«1|2») is the channel to measure on (@1) means input A (@2) means input B Complies to standards: SCPI 199...

Command Reference 9-69 :MEASure :TINTerval? PM6680B PM6681 8 (@«1|2|4»),(@«1|2|4»)] Time-Interval Traditional time-interval measurements are performed. The trigger levels are set automatically, and positive slope is used. The first channel in the channel list is the start channel, and the second is ...

9-70 Command Reference :MEASure :TOTalize :ACCumulated? PM6680B PM6681 [ 8 <time for gate open>][,(@«1|2|4|5|6») [,(@«1|2|4|5|6»)]] Totalize X gated by Y, accumulated The counter totalizes the pulses on the primary channel. The totalizing starts when the gate signal on the secondary channel go...

Command Reference 9-71 :CONFigure :TOTalize :CONTinuous PM6680B/81/85 [ 8 (@«1|2|4|6»)][,(@«1|2|4|6»)] Totalize Manually This is a count/totalize function controlled from the GPIB interface using the com- mand SENS:TOT:GATE 8 ON|OFF. The counter counts up for each event on the primary input channel....

9-72 Command Reference :MEASure :TOTalize :GATed? PM6680B PM6681 [ 8 (@«1|2|4|5|6») [,(@«1|2|4|5|6»)]] Totalize X gated by Y The counter totalizes the pulses on the primary channel. The totalizing starts when the gate signal on the secondary channel goes on and stops when the gate signal goes to off...

Command Reference 9-73 :MEASure :TOTalize :TIMed? PM6680B PM6681 [ 8 [<time for gate open> [,(@«1|2|4»)][,(@«1|2|4»)]]] Totalize X-Y During a Preset Time This is a count/totalize function during a predefined time. The start/stop signal is generated by the counter and set by <time for gate o...

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Command Reference 9-75 Memory Subsystem :MEMory :DELete :MACRo 8 ‘<Macro name>’ :FREE:SENSe?:NSTates?:MACRo? Related Common Commands: *DMC*EMC*GMC?*LMC?*LRN?*PMC*RCL*RMC*SAV

9-76 Command Reference :MEMory :DELete :MACRo PM6680B/81/85 8 ‘<Macro name>’ Delete one Macro This command removes an individual MACRo 1 . Parameters ‘<Macro name>’ is the name of the macro you want to delete. + <Macro name> is String data that must be surrounded by quotation marks...

Command Reference 9-77 :MEMory :FREE :MACRo? PM6680B/81/85 Memory Free for Macros This command gives information of the free memory available for MACRos in the counter. If no macros are specified, 1160 bytes are available. Returned format: <Bytes available>, <Bytes used> ¿ Complies to st...

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Command Reference 9-79 Output Subsystem :OUTPut [:STATe] 8 ON | OFF :SCALe 8 <Numeric value>

9-80 Command Reference :OUTPut PM6680B/81/85 8 <Boolean> Enable Analog Out This command switches on/off the analog output. See also :OUTput:SCALe com- mand on the next page. Parameters <Boolean> = ( 1/ON | 0/OFF ) Returned format: <1|0> ¿ Example: Send ® :OUTP 8 1 Switches on the a...

Command Reference 9-81 Read Function Perform Measurement and Read Data :READ [:SCALar]?:ARRay? 8 <Array Size>|MAX

9-82 Command Reference Complies to standards: SCPI 1991.0, confirmed. :READ? PM6680B/81/85 Read one Result The read function performs new measurements and reads out a measuring result without reprogramming the counter. Using the :READ? query in conjunction with the :CONFigure command gives you a mea...

Command Reference 9-83 This example configures the counter to make an array of 10 standard measure- ments. The counter is triggered and data from the first five measurements are read out with the :READ? query. Type of command: Aborts all previous measurement commands if * WAI is not used. Complies t...

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Command Reference 9-85 8 TIME | COUNts :STATe 8 ON|OFF :FREQuency :RANGe :LOWer 8 <Minimum frequency for autotrigger> | MIN | MAX :FUNCtion 8 ‘Measuring function [ Primary channel [ , Secondary channel ] ] ‘ :INTernal :FORMat 8 REAL | PACKed :ROSCillator :SOURce 8 INTernal | EXTernal :TOTalize...

9-86 Command Reference 2 Alias commands fot the: SDELay command for compatibility with the PM6680B. n Sense Subsystem command tree for PM6685 [:SENSe] :FUNCtion 8 ‘Measuring function [_ Primary channel [ , Secondary channel ] ] ‘ :EVENt 1 :LEVel 8 <Trigger level in Volts> | MIN | MAX :AUTO 8 O...

Command Reference 9-87 :ACQuisition :APERture PM6681 8 «<Decimal value > | MIN | MAX» Set the Measurement Time Sets the gate time for one measurement.Measurement Times of 80 to 1280 ns work in :FREQ:CW , FREQ:BURST, :FREQ:PRF, 8 :FREQ:RAT and :PERiod . If one of these short times is selected w...

9-88 Command Reference :ACQuisition :HOFF PM6680B PM6681 8 <boolean> Hold Off On/Off Switches the Hold Off function On/Off. Parameters: <Boolean> = 1 / ON | 0 / OFF Returned format: 1 | 0 ¿ *RST condition: OFF :ACQuisition :HOFF: ECOunt PM6680B PM6681 8 «<Decimal value>|MIN|MAX» Ho...

Command Reference 9-89 :ACQuisition :HOFF :TIME PM6680B PM6681 8 «<Decimal value> |MIN|MAX» Hold Off Time Sets the Hold Off time value. Parameters: <Decimal data> = a number between 200E–9 and 1.6777215 for PM6680B, and between 40E–9 and 1.34217727 for PM6681. Returned format: <Decima...

9-90 Command Reference :ACQuisition :RESolution PM6680B 8 «HIGH|LOW» Resolution Selects basic measurement mode for all time-related measurements.Parameters:HIGH: The resolution is the full 0.25 nsLOW: The resolution is limited to a 100-ns clock. You can use this to increase the bus speed. Saves abou...

Command Reference 9-91 <Decimal data> is a number between 1and 65535. Returned format: <Decimal data> ¿ *RST condition: 100 :AVERage :COUNt PM6680B PM6681 8 «<Decimal data>|MIN| MAX» Average Samples Sets the number of samples to use when doing time-interval averaging measure- ments...

9-92 Command Reference :AVERage :STATe PM6680B/81/85 8 <Boolean> Average or Single? Switch on/off the average function. Parameters: <Boolean> = 1 | ON / 0 | OFF ON means multiple period measurements for period related measurements and time-interval av- erage for Time-Interval measurement...

Command Reference 9-93 n Functions and channels in PM6685 :FREQuency [ :CW ] [ 8 ‘ 1 | 3 | 4 | 5 | 6 ‘ ] :FREQuency [ :CW ] :RATio [ 8 ‘ 1 | 3 | 4 , 1 | 3 | 4 ‘ ] :FREQuency :BURSt [ 8 ‘ 1 | 3 | 4 ‘ ] :FREQuency :PRFrequency [ 8 ‘ 1 | 3 | 4 ‘ ] :PERiod [ 8 ‘ 1 | 3 | 4 ‘ ] :NWIDth [ 8 ‘ 1 | 4 ‘ ] :PW...

9-94 Command Reference n Input channels PM6680B and PM6681 1 means input A 2 means input B 3 means input C (HF-input option) 4 means input E (Rear panel arming input) 5 means input A prescaled by 2 6 means the internal reference 7 means input A with the variable hysteresis mode n Functions and chann...

Command Reference 9-95 :INTernal :FORMat PM6680B/81/85 «REAL|PACKed» Internal Format This command selects the internal data format of the measurement result from the SENSe block. The purpose of the command is to increase the measurement speed. Parameters: REAL means that the result is calculated in ...

9-96 Command Reference :ROSCillator :SOURce PM6680B/81/85 8 «INT|EXT» Select Reference Oscillator Selects the signal from the external reference input as timebase instead of the in- ternal timebase oscillator. Returned format: <INT|EXT> ¿ *RST condition: INT Complies to standards: SCPI 1991.0,...

Command Reference 9-97 :TOTalize :GATE PM6680B/81/85 8 <Boolean> Gate On/Off Open/closes the gate for :TOTalize[:CONTinuous] . + Before opening the gate with this command, the counter must be in the ‘contin- uously initiated’ state , ( :INIT:CONT 8 ON ) or else the totalizing will not start. P...

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Command Reference 9-99 Status Subsystem :STATus :DREGister0 :ENABle 8 <bit mask> [:EVENt]? :OPERation :CONDition?:ENABle 8 <bit mask> [:EVENt]? :QUEStionable :CONDition?:ENABle 8 <bit mask> [:EVENt]? :PRESet n Related Common Commands: *CLS *ESE 8 <bit mask> *ESR?*PSC 8 <bi...

9-100 Command Reference :STATus :DREGister0? 80B/81/85 Read Device Status Event Register This query reads out the contents of the Device Event Register. Reading the De- vice Event Register clears the register. See Figure 6-14. Returned format: <dec.data> = the sum (between 0 and 6) of all bits...

Command Reference 9-101 :STATus :OPERation :CONDition? 80B/81/85 Read Operation Status Condition Register Reads out the contents of the operation status condition register. This register re- flects the state of the measurement process. See figure below. Note that bits 0 to 3, 7, and 9 to 15 are not ...

9-102 Command Reference :STATus :OPERation :ENABle 80B/81/85 8 <Decimal data> Enable Operation Status Reporting Sets the enable bits of the operation status enable register. This enable register contains a mask value for the bits to be enabled in the operation status event reg- ister. A bit th...

Command Reference 9-103 :STATus:OPERation? 80B/81/85 Read Operation Status, Event Reads out the contents of the operation event status register. Reading the Opera- tion Event Register clears the register. See figure on page 9-101. Returned Format: <Decimal data> ¿ <dec.data> = the sum (b...

9-104 Command Reference :STATus :QUEStionable :CONDition? PM6680B/81/85 Read Questionable Data/Signal Condition Register Reads out the contents of the status questionable condition register. Returned Format: <dec.data> = the sum (between 0 and 17920) of all bits that are true. See table below:...

Command Reference 9-105 :STATus :QUEStionable? PM6680B/81/85 Read Questionable Data/Signal Event Register Reads out the contents of the status questionable event register. Reading the Status Questionable Event Register clears the register. See figure on page 9-104. Returned Format: <dec.data> ...

Command Reference 9-107 :TIME 8 <timeout value> :UNPRotect:VERSion? n Related common command: *IDN?*OPT?*PUD 8 <arbitrary block program data> *RST System Subsystem :SYSTem :COMMunicate :GPIB :ADDRess 8 <Numeric value> | MIN | MAX :ERRor?:PRESet:SYSTem:SDETect[:ENABle] 8 ON | OFF (O...

9-108 Command Reference :SYSTem :COMMunicate: GPIB: ADDRess 80B/81/85 8 «<Numeric value>|MAX|MIN» [,«<Numeric value>|MAX|MIN»] Set GPIB Address This command sets the GPIB address. This selection overrides the switches on the rear panel of the counter. The set address is valid until a new...

Command Reference 9-109 :SYSTem :PRESet PM6680B/81/85 Preset This command sets the counter to the same default settings as when the front panel key LOCAL/PRESET is pressed in local mode. + These are not exactly the same settings as after *RST , SYST:PRES gives 200 ms Measurement Time and signal dete...

9-110 Command Reference :SYSTem :SET PM6680B/81/85 8 <Block data> Read or Send Settings Transmits in binary form the complete current state of the instrument. This data can be sent to the instrument to later restore this setting. This command has the same function as the * LRN? c ommon command...

9-112 Command Reference :SYSTem :UNPRotect PM6680B/81/85 Unprotect This command will unprotect the user data (set/read by * PUD ) and front setting memories 10-19 until the next PMT (Program message terminator) or Device clear or Reset (* RST) . This makes it necessary to send an unprotect command i...

Command Reference 9-113 Test Subsystem :TEST :CHECk 8 ON | OFF :SELect 8 RAM | ROM | LOGic | DISPlay | ALL n Related common command: *TST

9-114 Command Reference :TEST:CHECk PM6680B/81/85 8 <Boolean> Select Check signal This command connects the internal reference signal to the measuring logic, in- stead of an external measuring signal. This makes it possible to test all functions.The frequency of the reference is 10 MHz for PM6...

Command Reference 9-115 Trigger Subsystem :TRIGger [ STARt / :SEQuence [ 1 ] ] [ :LAYer [ 1 ] ] :COUNt 8 <Numeric value> | MIN | MAX n Related common command: *TRG

9-116 Command Reference :TRIGger:COUNt PM6680B/81/85 8 «<Numeric value> | MIN | MAX» No. of Triggerings on each Ext Arm start Sets how many measurements the instrument should make for each ARM:STARt condition, (block arming).These measurements are done without any additional arming conditions ...

Command Reference 9-117 Common Commands *CLS*DMC 8 <Macro label> , <Program messages> *EMC 8 <Decimal data> *ESE 8 <Decimal data> *ESR?*GMC? 8 <Macro label> *IDN?*LMC?*LRN?*OPC*OPC?*OPT? *PMC*PSC 8 <Decimal data> *PUD 8 <Arbitrary block program data> *RCL 8 ...

9-118 Command Reference *CLS PM6680B/81/85 Clear Status Command The * CLS common command clears the status data structures by clearing all event registers and the error queue. It does not clear enable registers and transition fil- ters. It clears any pending * WAI , * OPC , and * OPC? . Example: Sen...

Command Reference 9-119 * DMC PM6680B/81/85 8 <Macro label> , <Program messages> Define Macro Allows you to assign a sequence of one or more program message units to a macro label. The sequence is executed when the macro label is received as a command or query. Twenty five macros can be ...

9-120 Command Reference *EMC PM6680B/81/85 8 <Decimal data> Enable Macros This command enables and disables expansion and execution of macros. If mac- ros are disabled, the instrument will not recognize a macro although it is defined in the instrument. (The Enable Macro command takes a long ti...

Command Reference 9-121 *ESE PM6680B/81/85 8 <Decimal data> Standard Event Status Enable Sets the enable bits of the standard event enable register. This enable register contains a mask value for the bits to be enabled in the standard event status regis- ter. A bit that is set true in the enab...

9-122 Command Reference ∗ ESR? PM6680B/81/85 Event Status Register Reads out the contents of the standard event status register. Reading the Stan- dard Event Status Register clears the register. Returned Format: <dec.data> = the sum (between 0 and 255) of all bits that are true. See table on p...

Command Reference 9-123 *IDN? PM6680B/81/85 Identification query Reads out the manufacturer, model, serial number, Firmware level for main and GPIB program in an ASCii response data element. The query must be the last query in a program message.Response is <Manufacturer> , <Model> , <...

9-124 Command Reference *LRN? PM6680B/81/85 Learn Device Setup Learn Device Setup Query. Causes a response message that can be sent to the instrument to return it to the state it was in when the * LRN? query was made. Returned Format: :SYST:SET_<Block data> ¿ Where: <Block data> is #292&...

Command Reference 9-125 *OPC? PM6680B/81/85 Operation Complete Query Operation Complete query. The Operation Complete query places an ASCii char- acter 1 into the device’s Output Queue when all pending selected device opera- tions have been finished. Returned Format: 1 ¿ See also: Example 6 is Chapt...

9-126 Command Reference *PMC PM6680B/81/85 Purge Macros Removes all macro definitions. Example: *PMC See also: :MEMory:DELete:MACRo 8 ‘<Macro-name>’ if you want to remove a single macro. Complies to standards: IEEE 488.2 1987. *PSC PM6680B/81/85 8 <Decimal data> Power-on Status Clear Ena...

Command Reference 9-127 *PUD PM6680B/81/85 8 <Arbitrary block program data> Protected User Data Protected user data. This is a data area in which the user may write any data up to 64 characters. The data can always be read, but you can only write data after un- protecting the data area. A typi...

9-128 Command Reference ∗ RMC PM6680B/81/85 8 ‘<Macro name>’ Delete one Macro This command removes an individual MACRo. Parameters: ‘<Macro name>’ is the name of the macro you want to delete. + <Macro name> is String data that must be surrounded by quotation marks. See also: * PMC ...

Command Reference 9-129 *SAV PM6680B/81/85 _ <Decimal data> Save Saves the current settings of the instrument in an internal nonvolatile memory. Nineteen memory locations are available. Switching the power off and on does not change the settings stored in the registers.Note that memory positio...

9-130 Command Reference *SRE PM6680B/81/85 8 <Decimal data> Service Request Enable The Service Request Enable command sets the service request enable register bits. This enable register contains a mask value for the bits to be enabled in the status byte register. A bit that is set true in the ...

Command Reference 9-131 *STB? PM6680B/81/85 Status Byte Query Reads out the value of the Status Byte. Bit 6 reports the Master Summary Status bit (MSS), not the Request Service (RQS). The MSS is set if the instrument has one or more reasons for requesting service. Returned Format: <Integer> = ...

9-132 Command Reference *TST? PM6680B/81/85 Self Test The self-test query causes an internal self-test and generates a response indicat- ing whether or not the device completed the self-test without any detected errors. Returned Format: <Integer> ¿ Where: <Integer> = a number indicating ...

Clearing queue · · · · · · · · · · · · · 9-118Command · · · · · · · · · · · · · · · · · · · 8-2Device specific, code list · · · · · · · 8-13Escape from condition· · · · · · · · · 3-19Execution · · · · · · · · · · · · · · · · · · · · 8-7In self test · · · · · · · · · · · · · · · · · 9-132Message avai...

Totalize X · · · · · · · · · · · · · · · · · · · 9-72 Gated Voltage Measurement · · · · · 9-97GET · · · · · · · · · · · · · 6-29,7-6,9-8,9-131Get Macro · · · · · · · · · · · · · · · · · · · 9-122GPIB Address · · · · · · · · · · · · · 1-4,9-108Group Execute Trigger · · · · · · · · · 9-131 H Header pa...

Passed· · · · · · · · · · · · · · · · · · · · 9-100Set lower · · · · · · · · · · · · · · · · · · · 9-17Set upper · · · · · · · · · · · · · · · · · · · 9-18 Listener function · · · · · · · · · · · · · · · · 1-6Local · · · · · · · · · · · · · · · · · · · · · · · · · 1-5 Control · · · · · · · · · · · ·...

Pmt · · · · · · · · · · · · · · · · · · · · · · 3-7,3-10PON-bit · · · · · · · · · · · · · · · · · 6-21,9-121Positive slope · · · · · · · · · · · · · · · · · 9-51Power On · · · · · · · · · · · · · · · 6-21,9-121 Status Clear · · · · · · · · · · · · · · · · 9-126 Preset · · · · · · · · · · · · · · · ·...

S Sample Size for Average · · · · · · · · 9-91Sample Size for Statistics · · · · · · · · 9-14Save · · · · · · · · · · · · · · · · · · · · 2-5,9-129Scaling Factor Analog Output · · · · · · · · · · · 6-11,9-80 SCPI · · · · · · · · · · · · · · · · · · · · · · · · · 3-2 Compliance of instrument · · · · ...

Measurement stopped · · · · · · · 9-102Operation event · · · · · · · · · · · · · 9-103Overflow · · · · · · · · · · · · · · · · · · 9-104Preset · · · · · · · · · · · · · · · · · · · · 9-103Questionable Data/signal · · · · · 9-104Questionable Data/signal, Event · · · · · · · · · · · · · · · · · · · · ...

Start/stop · · · · · · · · · · · · · · · · · · · · 2-3X gated by Y · · · · · · · · · · · · · · · · 9-72X gated by Y, accumulated · · · · · 9-70X start/stop by Y · · · · · · · · · · · · · 9-72 Transition time · · · · · · · · · · · · · · · · 9-91Trigger · · · · · · · · · · · · · · · · · · · · · · · 6-...