Agilent Technologies 3458A Guia do Utilizador

Agilent Technologies3458A MultimeterUser’s GuideManual Part Number: 03458-90014Printed in U.S.A

10 ContentsMath Operations ...262Subprogram Definition/Deletion ... 263Subprogram Executi

100 Chapter 4 Making Measurements command is specific to Hewlett-Packard 200/300 controllers using BASlC language). The TRANSFER statement is the fa

Chapter 4 Making Measurements 101Using the SREALOutput FormatThe following program shows how to convert 10 readings output in the SREAL format.10 O

102 Chapter 4 Making Measurements readings to the computer using the DREAL format. The ENTER statement is easier to use since no I/O path is necessa

Chapter 4 Making Measurements 103the output buffer when a new reading is available.)If reading memory is enabled in the FIFO mode and reading memor

104 Chapter 4 Making Measurements * For direct-sampled digitizing, the format used depends on the amplitude of the input signal. Refer to Chapter 5

Chapter 4 Making Measurements 105Frequency or period measurements: The integration time does not affect frequency or period measurements. For these

106 Chapter 4 Making Measurements 70 OUTPUT 722;"TARM SGL" !TRIGGER READINGS80 ENDHigh-Speed DCI Example The following program measures DC

Chapter 4 Making Measurements 10750 OUTPUT 722;"ACV 10" !AC VOLTS, 10V RANGE60 OUTPUT 722;"NPLC 0.1"" !0.1 PLC INTEGRATION

108 Chapter 4 Making Measurements The following program transfers readings directly to the controller at the fastest possible rate. This program con

Chapter 4 Making Measurements 109The following program is an example of transferring readings from reading memory to the controller at the fastest

Contents 11Capturing the Data ...352High Speed Data Transfers ...355Softw

110 Chapter 4 Making Measurements computer's timer.10 REAL Num_readings !CREATE ARRAY20 Num_readings=10000 !NUMBER OF READINGS = 1000030 ASSIGN

Chapter 4 Making Measurements 111the signal's polarity: NEG = low-going, POS = high-going. The events that can generate a signal on the Ext Ou

112 Chapter 4 Making Measurements Reading Complete When specified, the reading complete event (RCOMP event) produces a 1 µs pulse following each rea

Chapter 4 Making Measurements 11310 OUTPUT 722;"PRESET NORM" !DCV,NRDGS,l,AUTO, TARM AUTO, TRIG SYN20 OUTPUT 722;"MEM FIFO" !EN

114 Chapter 4 Making Measurements Input Complete The input complete event (ICOMP event) is similar to the RCOMP event in that it produces a 1µs puls

Chapter 4 Making Measurements 115to assert SRQ (RQS command). The EXTOUT SRQ pulse does not necessarily occur whenever the SRQ bit is set; it occu

116 Chapter 4 Making Measurements Math OperationsEach math operation performs a specific mathematical operation on each reading and/or stores data o

Chapter 4 Making Measurements 117those two operations), send:OUTPUT 722;"MATH CONT" !RE-ENABLES ONE REAL-TIME MATH OPERATIONorOUTPUT 722;

118 Chapter 4 Making Measurements Result = Reading - OFFSETWhere:OFFSET is the value stored in the OFFSET register (typically the first reading).Rea

Chapter 4 Making Measurements 11950 OUTPUT 722;"MMATH NULL" !ENABLE POST-PROCESS NULL OPERATION60 OUTPUT 722;"NRDGS 21" !21 REA

12 Contents

120 Chapter 4 Making Measurements Percent The PERC math operation determines the difference, in percent, between each reading and the value in the P

Chapter 4 Making Measurements 121The following program uses the real-time DB operation to determine an amplifier's voltage gain. Line 40 store

122 Chapter 4 Making Measurements 60 ENTER 722;A !SYN EVENT, ENTER DBM70 PRINT A !PRINT DBM80 ENDFor example, if the input voltage is 10V, the power

Chapter 4 Making Measurements 123operation. That is the readings do not have to be recalled from memory in order to perform the STAT operation. Als

124 Chapter 4 Making Measurements 10 OUTPUT 722;"PRESET NORM" !PRESET,NRDGS 1,AUTO, DCV 10, TRIG SYN20 OUTPUT 722;"MEM FIFO" !

Chapter 4 Making Measurements 125For example (using the first equation), if the reading rate is 200Hz and the DEGREE is 20, the time constant is:Us

126 Chapter 4 Making Measurements The following example performs a temperature measurement using a 10kW thermistor and returns the result in degrees

Chapter 5 Digitizing 127Chapter 5 DigitizingIntroduction ...129Digitizing Methods ...

128 Chapter 5 Digitizing

Chapter 5 Digitizing 129Chapter 5 DigitizingIntroductionDigitizing is the process of converting a continuous analog signal into a series of disc

Chapter 1 Installation and Maintenance 13Chapter 1 Installation and MaintenanceIntroduction ...

130 Chapter 5 Digitizing For most digitizing applications, the multimeter enters its high-speed mode whenever sampling is initiated. In the high-spe

Chapter 5 Digitizing 131high-speed mode, the multimeter writes-over any sample still in the output buffer when a new sample is available.) For more

132 Chapter 5 Digitizing Level TriggeringWhen digitizing, it is important to begin sampling at some defined point on the input signal such as when t

Chapter 5 Digitizing 133can select the level triggering shown in Figure 27 merely by specifying the LEVEL trigger event (TRIG LEVEL command).The fo

134 Chapter 5 Digitizing this case, a negative percentage of the range (-25%) is used to level trigger at -2.5V. positive slope. Figure 29 shows the

Chapter 5 Digitizing 135The PRESET DIG command configures the multimeter for DC voltage measurements with a sampling rate of 50,000 samples per sec

136 Chapter 5 Digitizing • The multimeter’s triggering hierarchy (trigger arm event, trigger event, and sample event) applies to DCV digitizing. Ref

Chapter 5 Digitizing 13710OPTION BASE 1 !COMPUTER ARRAY NUMBERING STARTS AT 120Num_samples=256 !SPECIFY NUMBER OF SAMPLES30INTEGER Int_samp(l:256)

138 Chapter 5 Digitizing sampling, the minimum possible interval between samples is 20µs.Direct SamplingRemarks• You cannot use autorange for direct

Chapter 5 Digitizing 139uses whichever command was specified last. (When using the SWEEP command, the sample event is automatically set to TIMER.)•

14 Chapter 1 Installation and Maintenance

140 Chapter 5 Digitizing composite waveform with a period equal to that of the input signal.The advantage of sub-sampling is that samples can be eff

Chapter 5 Digitizing 141The Sync SourceEventIn the preceding sub-sampling example, it was assumed that the multimeter could somehow synchronize its

142 Chapter 5 Digitizing The LEVEL sync source event (which is the power-on/default sync source event) occurs when the input signal reaches a specif

Chapter 5 Digitizing 143Sub-SamplingRemarks• For sub-sampling, the trigger event and sample event requirements are ignored (these events are discus

144 Chapter 5 Digitizing source event and the first sample in each burst; the default delay for sub-sampling is 0 seconds.)Sending Samples toMemoryW

Chapter 5 Digitizing 145the multimeter to take 1000 samples (Num_samples variable) with a 2µs effective_interval (Eff_int variable). The measuremen

146 Chapter 5 Digitizing Viewing Sampled DataThe program on the following page plots digitized data to the controller’s CRT (this particular program

Chapter 5 Digitizing 147101!FAST OPERATION, TARM SYN, SUB-SAMPLING (SINT OUTPUT FORMAT), 10V RANGE102!2ms EFFECTIVE INTERVAL, 1000 SAMPLES110TRANSF

148 Chapter 5 Digitizing 670 DRAW Wave_x,Wave_form(Wave_y)680NEXT Wave_y690IF Wave_x>l0*Time_div THEN DISP "More samples taken than displaye

Chapter 6 Command Reference 149Chapter 6 Command ReferenceIntroduction ...151Language Convention

Chapter 1 Installation and Maintenance 15Chapter 1 Installation and MaintenanceIntroductionThis chapter contains information on initial inspectio

150 Chapter 6 Command ReferenceSWEEP ...248T ...

Chapter 6 Command Reference 151IntroductionChapter 6 Command ReferenceIntroductionThe first part of this chapter discusses the multimeter's

Introduction152 Chapter 6 Command Reference LanguageConventionsThe multimeter communicates with a system controller over the GPIB bus.1 Each instrum

Chapter 6 Command Reference 153IntroductionorOUTPUT 722;"ACV 10,-1"From remote only, you can use two commas to indicate a default value.

Introduction154 Chapter 6 Command Reference command specifies integration time in seconds. The range of values for this command is 500ns to 1s. When

Chapter 6 Command Reference 155Commands by Functional GroupCommands by Functional GroupThe following is a list of al1 commands recognized by the mu

Commands vs. Measurement Functions156 Chapter 6 Command Reference Commands vs. Measurement FunctionsTable 6-1 shows the multimeter commands that app

Chapter 6 Command Reference 157ACALACALAutocal. Instructs the multimeter to perform one or all of its self calibrations.Syntax ACAL [type][,securit

ACBAND158 Chapter 6 Command Reference • The time required to perform each autocal routine is:ALL : 11 minutesDCV : 1 minuteAC : 1 minuteOHMS : 10 mi

Chapter 6 Command Reference 159ACDCI, ACDCV, ACI, ACVACBAND parameters.• Query Command. The ACBAND? query command returns two numbers separated by

16 Chapter 1 Installation and Maintenance Options and AccessoriesTable 1 lists the available options, and Table 2 lists the available accessories for

APER160 Chapter 6 Command Reference APERAperture. Specifies the A/D converter integration time in seconds.Syntax APER [aperture]aperture Specifies t

Chapter 6 Command Reference 161AUXERR?Power-on control = ON.Default control = ON.Remarks • With autorange enabled, the multimeter samples the input

AZERO162 Chapter 6 Command Reference Remarks • The auxiliary error register indicates hardware related errors. If one or more bits are set, the mult

Chapter 6 Command Reference 163AZEROcontrol The control parameter choices are:Power-on control = ONDefault control = ONRemarks • When autozero is O

BEEP164 Chapter 6 Command Reference BEEPControls the multimeter's beeper. When enabled, the beeper emits a 1 kHz beep if an error occurs.Syntax

Chapter 6 Command Reference 165CALNUM?Default name = 0.Remarks • Subprograms are created with the SUB command.• The multimeter sets bit 0 in the st

COMPRESS166 Chapter 6 Command Reference Syntax CALSTR string[,security_code]string This is the alpha/numeric message that will be appended to the ca

Chapter 6 Command Reference 167CONT• Related Commands: CALL, CONT, DELSUB, PAUSE, SCRATCH, SUB, SUBENDExampleThe following program statement compre

DCI, DCV168 Chapter 6 Command Reference DCI, DCVRefer to the FUNC command.DEFEATEnables or disables the multimeter's input protection algorithm

Chapter 6 Command Reference 169DEFKEYExample OUTPUT 722;"DEFEAT ON" !DISABLES PROTECTION, SYNTAX & ERROR ALGORITHMSDEFKEYDefine Key.

Chapter 1 Installation and Maintenance 17Installing the MultimeterThis section discusses the multimeter's grounding and power requirements and

DELAY170 Chapter 6 Command Reference Examples DEFKEYOUTPUT 722;"DEFKEY 1,'DCI 1;AZERO 0FF;NPLC 0'" !ASSIGNS COMMANDS TO F1Cleari

Chapter 6 Command Reference 171DELSUBDELSUBDelete Subprogram. Removes a single subprogram from memory.Syntax DELSUB namename Subprogram name. A sub

DSAC, DSDC172 Chapter 6 Command Reference Power-on control = ON.Default control = ON.message The message parameter is the message to be displayed. T

Chapter 6 Command Reference 173DSAC, DSDCfollowing table shows the max._input parameters and the ranges they select.Power-on max._input= not applic

EMASK174 Chapter 6 Command Reference memory/output format, no format conversions are necessary.)• Related Commands: DSDC, FUNC, LEVEL, LFILTER, SLOP

Chapter 6 Command Reference 175EMASKweights. The error conditions and their weights are:Power-on value = 32767 (all enabled).Default value = 32767

END176 Chapter 6 Command Reference ENDThe END command enables or disables the GPIB End Or Identify (EOI) function.Syntax END [control]control The co

Chapter 6 Command Reference 177ERR?ERR?Error Query. When an error occurs, it sets a bit in the error register and illuminates the display's ER

ERRSTR?178 Chapter 6 Command Reference 30 PRINT A !PRINTS RESPONSE40 ENDERRSTR?Error String Query. The ERRSTR? command reads the least significant s

Chapter 6 Command Reference 179EXTOUTevent The event choices are:Power-on event = ICOMP.Default event = ICOMP.polarity Specifies the polarity of th

18 Chapter 1 Installation and Maintenance Setting the LineVoltage SwitchesThe line voltage selection is pre configured according to the country to wh

FIXEDZ180 Chapter 6 Command Reference • Related Commands: NRDGS, SRQ, STB?, SWEEP, TBUFFExample OUTPUT 722;"EXTOUT APER" !SETS EXTOUT E

Chapter 6 Command Reference 181FREQFREQFrequency. Instructs the multimeter to measure the frequency of the input signal. You must specify whether t

FSOURCE182 Chapter 6 Command Reference • The leftmost digit which is a half digit for most measurement functions, is a full digit (0 - 9) for freque

Chapter 6 Command Reference 183FUNCFUNCFunction. Selects the type of measurement (AC voltage, DC current. etc.). lt also allows you to specify the

FUNC184 Chapter 6 Command Reference To select autorange, specify AUTO for max._input or default the parameter. In the autorange mode, the multimeter

Chapter 6 Command Reference 185FUNC%_resolution For most measurement functions, you specify the %_resolution as a percentage of the max._input para

ID?186 Chapter 6 Command Reference Examples In the following program, line 10 allows %_resolution in line 20 to control the resolution. The resoluti

Chapter 6 Command Reference 187ISCALE?control The control parameter choices are:Power-on control = OFF.Default control = ON.Remarks • Turning the i

ISCALE?188 Chapter 6 Command Reference Syntax ISCALE?Remarks • The scale factor is always 1 for the ASCII, SREAL, and DREAL output formats.• Reading

Chapter 6 Command Reference 189LEVEL30 Num_readings=50 !NUMBER OF READINGS = 5040 ALLOCATE REAL Rdgs(l:Num_readings) !CREATE ARRAY FOR READINGS50 A

Chapter 1 Installation and Maintenance 19Connecting the GPIBCableAttach the GPIB1 cable to the 24-pin GPIB connector on the rear panel of the multim

LFILTER190 Chapter 6 Command Reference circuitry only. This does not affect the coupling of the signal being measured.Power-on coupling = AC.Default

Chapter 6 Command Reference 191LFREQSyntax LFILTER [control]controlThe control parameter choices are:Power-on control = OFF.Default control = ON.Re

LINE?192 Chapter 6 Command Reference Default reference frequency = the exact measured line frequency (or measured value/8 for 400Hz line frequency).

Chapter 6 Command Reference 193LOCKreference frequency to the measured value.• Related Commands: LFREQ10 OUTPUT 722; "LINE?" !MEASURES T

MATH194 Chapter 6 Command Reference operationThe operation parameter choices are:operation ParameterNumeric Equiv. DescriptionOFF 0 Disables all ena

Chapter 6 Command Reference 195MATHPower-on operation_a,operation_b = OFF,OFF.Default operation_a,operation_b = OFF,OFF.Power-on register values =

MCOUNT?196 Chapter 6 Command Reference Example The following program performs the real-time NULL math operation on 20 readings. After executing the

Chapter 6 Command Reference 197MENUPower-on mode = OFF.Default mode = ON.Remarks • In the high-speed mode, when reading memory is enabled in the F

MFORMAT198 Chapter 6 Command Reference Syntax MENU [mode]modeThe mode parameter choices are:Power-on mode = mode selected when power was removed.Def

Chapter 6 Command Reference 199MFORMATThe format parameter choices are:* The ASCII format is actually 15 bytes for the reading plus 1 byte for a nu

2AGILENT TECHNOLOGIES WARRANTY STATEMENTAGILENT PRODUCT: 3458A Multimeter DURATION OF WARRANTY: 1 year1. Agilent Technologies warrants Agilent hardwa

20 Chapter 1 Installation and Maintenance A total of 15 devices can be connected together on the same GPIB bus. The cables have single male/female co

MMATH200 Chapter 6 Command Reference FIFO (MEM FIFO command), and reading memory must be empty (done by executing the MEM FIFO command) before sampl

Chapter 6 Command Reference 201MMATHPower-on operation_a,operation_b = OFF,OFF.Default operation_a,operation_b = OFF,OFF.FTHRM 8 Result=temperature

MMATH202 Chapter 6 Command Reference Power-on register values = a11 registers are set to 0 with the following exceptions:Remarks • Any enabled post-

Chapter 6 Command Reference 203MSIZE• When you use the RMEM command to recall readings, it turns off reading memory. This means any new readings wi

NDIG204 Chapter 6 Command Reference • Query Command. The MSIZE? query command returns two responses separated by a comma. The first response is the

Chapter 6 Command Reference 205NPLCSyntax NPLC [power_line_cycles]power_line_cyclesThe primary use of the NPLC command is to establish normal mode

NRDGS206 Chapter 6 Command Reference interaction occurs between NPLC (or APER) when you specify resolution as follows:• If you send the NPLC (or APE

Chapter 6 Command Reference 207NRDGSDesignates the number of readings per trigger event. The valid range for this parameter is 1 to 16777215. (The

NRDGS208 Chapter 6 Command Reference events, a single occurrence of the SYN event satisfies all of the specified SYN event requirements. This is sho

Chapter 6 Command Reference 209OCOMP50 OUTPUT 722;"NRDGS 4,TIMER" !SELECTS 4 READINGS/TRIGGER & TIMER60 ENTER 722;Rdgs(*) !TRIGGER AN

Chapter 1 Installation and Maintenance 21InstallationVerificationThe following program verifies that the multimeter is operating and can communicate

OFORMAT210 Chapter 6 Command Reference OFORMATOutput Format. Designates the GPIB output format for readings sent directly to the controller or trans

Chapter 6 Command Reference 211OFORMATSINT format: +32767 or -32768 (unscaled)DINT format: +2.147483647E+9 or -2.147483648E+9 (unscaled) ASCII, SRE

OFORMAT212 Chapter 6 Command Reference 120 FOR I=1 TO Num_readings130 Rdgs(I)=Int_rdgs(I) !CONVERT EACH INTEGER READING TO REAL135 !FORMAT (NECESSAR

Chapter 6 Command Reference 213OFORMAT70 OUTPUT @Dvm;"PRESET NORM;OFORMAT SREAL;NRDGS ";Num_readings75 !TRIG SYN, SREAL OUTPUT FORMAT, 1

OHM, OHMF214 Chapter 6 Command Reference The preceding program used the TRANSFER statement to get readings from the multimeter. The following progra

Chapter 6 Command Reference 215PAUSEPAUSESuspends subprogram execution. The subprogram can be resumed using the CONT command or by executing the GP

PER216 Chapter 6 Command Reference When the subprogram is finished, a total of 15 readings are in memory. To call the above subprogram, send:OUTPUT

Chapter 6 Command Reference 217PRESETPower-on %_resolution = not applicable.Default %_resolution = .00001.Remarks • The reading rate is the longer

PRESET218 Chapter 6 Command Reference AZERO ON MFORMAT SREALBEEP ON MMATH OFFDCV AUTO NDIG 6DELAY -1 NPLC 1DISP ON NRDGS 1,AUTOFIXEDZ OFF OCOMP OFF

Chapter 6 Command Reference 219PURGEOFORMAT SINTRemarks • Related Commands: RESETExamples OUTPUT 722;"PRESET NORM" !CONFIGURES FOR REMOTE

22 Chapter 1 Installation and Maintenance Repair Service You may have the multimeter repaired at an Agilent Technologies service center whether it is

QFORMAT220 Chapter 6 Command Reference Power-on type = NORM.Default type = NORM.• The numeric query equivalents for alpha parameters are shown under

Chapter 6 Command Reference 221RALPHA10 OUTPUT 722; "QFORMAT ALPHA" 20 OUTPUT 722; "ARANGE?"30 ENTER 722;A$40 PRINT A$50 ENDTyp

RANGE222 Chapter 6 Command Reference Power-on max._input = AUTO.Default max._input = AUTO.%_resolutionFor all functions except the digitizing functi

Chapter 6 Command Reference 223RANGEfrequency and period measurements, you specify %_resolution as the number of digits to be resolved. For the rem

RATIO224 Chapter 6 Command Reference Chapter 0:Command ReferenceRATIOThe RATIO command instructs the multimeter to measure a DC reference voltage ap

Chapter 6 Command Reference 225RES60 ENTER 722;A !ENTER RATIO70 PRINT A !PRINT RATIO80 ENDRESResolution. Specifies reading resolution.Syntax RES [%

RESET226 Chapter 6 Command Reference For frequency or period measurements, the defau1t %_resolution is .00001 which selects a gate time of 1s and 7

Chapter 6 Command Reference 227RESETAborts readings in process.Clears error and auxiliary error registers.Clears the status register except the Pow

REV?228 Chapter 6 Command Reference 30 ENDREV?Revision Query. Returns two numbers separated by a comma. The first number is the multimeter's ma

Chapter 6 Command Reference 229RMEMPower-on register = none.Default register = DEGREE.Remarks • Math register contents are always output in the AS

Chapter 2 Getting Started 23Chapter 2 Getting StartedIntroduction ... 25Before Applying Power

RQS230 Chapter 6 Command Reference Designates the record from which to recall readings. Records correspond to the number of readings specified by th

Chapter 6 Command Reference 231RSTATEYou enable a condition by specifying its decimal weight as the value parameter. For more than one condition, s

SCAL232 Chapter 6 Command Reference Power-on name = none.Default name = 0.Remarks • Whenever the multimeter's power is removed, the present st

Chapter 6 Command Reference 233SETACVthe factory with its security code set to 3458.new_codeThis is the new security code. The code is an integer f

SLOPE234 Chapter 6 Command Reference sampling, or synchronous sampling. The parameters are:Power-on type = ANA.Default type = ANA.Remarks • Bandwidt

Chapter 6 Command Reference 235SMATHRefer to "Query Commands" near the front of this chapter for more information.• Related Commands: LEV

SRQ236 Chapter 6 Command Reference The number parameter is the value to be placed in the register.Default number = last reading.Power-on number = se

Chapter 6 Command Reference 237SSAC, SSDCSSAC, SSDCSub-Sampling. Configures the multimeter for sub-sampled voltage measurements (digitizing). The S

SSAC, SSDC238 Chapter 6 Command Reference is not changed). Later, where you change to another measurement function, the output format returns to tha

Chapter 6 Command Reference 239SSAC, SSDC90 OUTPUT @Dvm; "SSDC 10" !SUB-SAMPLING, 10V RANGE, DC-COUPLED100 OUTPUT @Dvm; "SWEEP 5E -

24 Chapter 2 Getting Started

SSPARM?240 Chapter 6 Command Reference 220 Samp(I)=DROUND(Samp(I),4) !ROUND TO 4 DIGITS230 NEXT I235 !--------------------------SORT SAMPLES--------

Chapter 6 Command Reference 241SSRCcommand allows you to synchronize bursts to an external signal or to a voltage level on the input signal.For syn

SSRC242 Chapter 6 Command Reference Power-on mode = AUTODefault mode = AUTORemarks • For sub-sampling, the trigger event and the sample event are ig

Chapter 6 Command Reference 243SSRC130 OUTPUT @Dvm;"ISCALE?" !QUERY SCALE FACTOR FOR SINT FORMAT140 ENTER @Dvm; S !ENTER SCALE FACTOR150

SSTATE244 Chapter 6 Command Reference SSTATEStore State. Stores the multimeter's present state and assigns it a name. States are recalled using

Chapter 6 Command Reference 245STB?found the desired state, press the Enter key to recall that state.• Related Commands: MSIZE, PURGE, RSTATE, SCRA

SUB246 Chapter 6 Command Reference SUBSubprogram. Stores a series of commands as a subprogram and assigns the sub-program name.Syntax SUB namenameSu

Chapter 6 Command Reference 247SUB• The only way to take readings within a subprogram is to use the TARM SGL or TRIG SGL command. When either of th

SUBEND248 Chapter 6 Command Reference until another external trigger occurs. After the external trigger is received, the TRIG SGL command is encount

Chapter 6 Command Reference 249SWEEPsample to the next. For sub-sampling, the valid range of this parameter is 10E-9 to 6000 seconds with 10ns incr

Chapter 2 Getting Started 25Chapter 2 Getting StartedIntroductionThis chapter is intended for the novice multimeter user. It shows you how to use

SWEEP250 Chapter 6 Command Reference 30 Num_samples=lOOO !DESIGNATE NUMBER OF SAMPLES40 Eff_int=2.0E-6 !DESIGNATE EFFECTIVE INTERVAL 50 INTEGER Int_

Chapter 6 Command Reference 251TTT is an abbreviation for the TRIG command.Syntax T [event]Refer to the TRlG command for more information.TARMTrigg

TARM252 Chapter 6 Command Reference Default number_arms = 1 (multiple arming disabled)Remarks • For all measurement functions except sub-sampling (s

Chapter 6 Command Reference 253TBUFFall measurement cycles are complete. If you want to regain control of the bus immediately, suppress the cr lf b

TEMP?254 Chapter 6 Command Reference TEMP?Temperature Query. Returns the multimeter's internal temperature in degrees Centigrade.Syntax TEMP?Re

Chapter 6 Command Reference 255TESTTESTCauses the multimeter to perform a series of internal self-tests.Syntax TESTRemarks • Always disconnect any

TONE256 Chapter 6 Command Reference PRESET state, the multimeter uses the NRDGS command. The power-on values for SWEEP can only be used for sub-samp

Chapter 6 Command Reference 257TRIGThe event parameter choices are:* The LEVEL trigger event can be used only for DC voltage and direct-sampled mea

TRIG258 Chapter 6 Command Reference multimeter is properly configured. Line 20 suspends measurements by setting the trigger event to HOLD. Lines 30

Chapter 7 BASIC Language for the 3458A 259Chapter 7 BASIC Language for the 3458AIntroduction ...

26 Chapter 2 Getting Started The Display In the power-on state, the display is continuously updated with each new DC voltage reading. Along the botto

260 Chapter 7 BASIC Language for the 3458A

Chapter 7 BASIC Language for the 3458A 261Chapter 7 BASIC Language for the 3458A IntroductionThis chapter describes the BASIC commands supported

262 Chapter 7 BASIC Language for the 3458A • Local variables (all variables are global)• Parameter passing• Any other BASIC commands not listed in t

Chapter 7 BASIC Language for the 3458A 263DIV, MOD, ABS, SQR, LOG, EXP, LGT, SIN, COS, ATNBinary Operations: AND, OR, EXOR, NOT, BINAND, BINCMP, BI

264 Chapter 7 BASIC Language for the 3458A New Multimeter CommandsThe following commands are not documented in chapter 6 but are included in this su

Chapter 7 BASIC Language for the 3458A 2653458A BASIC Language Example ProgramThe following example program illustrates the use of the 3458A's

266 Chapter 7 BASIC Language for the 3458A 500 ENTER @Dvm; Mean ! Read M into computer510 T2=TIMEDATE ! Store end time520 PRINT"MEAN";Mean

Chapter 7 BASIC Language for the 3458A 267in an assignment statement with the LET command. For example, the following statements automatically decl

268 Chapter 7 BASIC Language for the 3458A OUTPUT 722; "LET TIME_INT =40*3E-3"Variables can replace numeric parameters in any 3458A comman

Chapter 7 BASIC Language for the 3458A 269the maximum array size is determined by available 3458A memory (approximately 10 kbytes if no stored stat

Chapter 2 Getting Started 27Note If the ERR annunciator is illuminated at this point, an error was detected during or after the power-on self-test.

270 Chapter 7 BASIC Language for the 3458A general math functions, trigonometric functions, and binary functions are available. The 3458A also has a

Chapter 7 BASIC Language for the 3458A 271Trigonometric Functions Three trigonometric functions are provided in the 3458A. The trigonometric functi

272 Chapter 7 BASIC Language for the 3458A * If the displacement is positive, rotating or shifting is toward the least significant bit. If the dis

Chapter 7 BASIC Language for the 3458A 27320 OUTPUT 722; "LET A=25.3765477"30 OUTPUT 722; "IF SIN(A)^2 + COS(A)^2 = 1 THEN"40 O

274 Chapter 7 BASIC Language for the 3458A depends on the individual sizes of the subprograms. A typical subprogram containing 10 commands (includin

Chapter 7 BASIC Language for the 3458A 275The subprogram will not be stored if a subprogram nesting error exists when the SUBEND command is execute

276 Chapter 7 BASIC Language for the 3458A itself from the catalog listing of subprograms (CAT command).SCRATCH The SCRATCH command deletes (scratch

Chapter 7 BASIC Language for the 3458A 277ExecutionCommandsSubprogram execution commands control the execution of a subprogram. The syntax statemen

278 Chapter 7 BASIC Language for the 3458A in the subprogram. The RETURN command returns control to the caller without executing the SUBEND command.

Chapter 7 BASIC Language for the 3458A 279command is shown below.FOR counter = initial_value TO final_value [STEP step_size]program segmentNEXT cou

28 Chapter 2 Getting Started Making aMeasurementIn the power-on state, DC voltage measurements are selected and the multimeter automatically triggers

280 Chapter 7 BASIC Language for the 3458A 130 ENDIF...THEN Branching The IF...THEN command provides conditional branching within 3458A subprograms.

Appendix A Specifications 281Appendix A SpecificationsIntroduction ...283DC Voltage ...

282 Appendix A Specifications

Appendix A Specifications 283Appendix A SpecificationsIntroductionThe 3458A accuracy is specified as a part per million (ppm) of the reading plu

284 Appendix A Specifications 1 / DC VoltageDC VoltageAccuracy3 (ppm of Reading (ppm of Reading for Option 002) + ppm of Range)Transfer Accuracy/Lin

Appendix A Specifications 285Reading Rate (Auto-Zero Off) Temperature Coefficient (Auto-Zero off) For a stable environment ±1°C add the following a

286 Appendix A Specifications 2 Accuracy1 (ppm of Reading + ppm of Range)Two-Wire Ohms AccuracyFor Two-Wire Ohms ( OHM ) accuracy, add the followi

Appendix A Specifications 2873 / DC CurrentDC Current (DCI Function)Accuracy 3 (ppm Reading + ppm Range)Range Full ScaleMaximum ResolutionShunt Res

288 Appendix A Specifications 4 / AC VoltageGeneral InformationThe 3458A supports three techniques for measuring true rms AC voltage, each offering

Appendix A Specifications 289AC Accuracy (continued): 24 Hour to 2 Year (% of Reading + % of Range)Transfer AccuracyAC + DC Accuracy (ACDCV Functio

Chapter 2 Getting Started 29In addition to the functions selected by the FUNCTION keys, the multimeter can perform direct-sampled or sub-sampled dig

290 Appendix A Specifications High Frequency Temperature CoefficientFor outside Tcal ±5°C add the following error.(% of Reading)/°CAnalog Mode (ACV

Appendix A Specifications 291Reading Rates 1Settling CharacteristicsFor first reading or range change error using default delays, add .01% of input

292 Appendix A Specifications AC + DCV Accuracy (ACDCV Function)For ACDCV Accuracy apply the following additional error to the ACV accuracy. (% of R

Appendix A Specifications 2935 / AC CurrentAC Current (ACI and ACDCI Functions)AC Accuracy 224 Hour to 2 Year (% Reading + % Range)AC + DC Accuracy

294 Appendix A Specifications Settling CharacteristicsFor first reading or range change error using default delays, add .01% of input step additiona

Appendix A Specifications 2957 / Digitizing SpecificationsGeneral InformationThe 3458A supports three independent methods for signal digitizing. Ea

296 Appendix A Specifications Dynamic Performance100 mV, 1 V, 10 V Ranges; Aperture = 6 µsDirect and Sub-sampled Digitizing (DSDC, DSAC, SSDC and SS

Appendix A Specifications 2978 / System SpecificationsFunction-Range-MeasurementThe time required to program via GPIB a new measurement configurati

298 Appendix A Specifications 9 / RatioType of Ratio 1Accuracy10 / Math FunctionsGeneral Math Function SpecificationsMath is executable as either a

Appendix A Specifications 29911 / General SpecificationsOperating EnvironmentTemperature Range: 0°C to 55°COperating Location: Indoor Use OnlyOpera

3Safety SymbolsAlternating current (AC)Instruction manual symbol affixed to product. Indicates that the user must refer to the manual for specific WAR

30 Chapter 2 Getting Started Notice the display's MRNG (manual range) annunciator is on. This annunciator is on whenever you are not using autor

300 Appendix A Specifications

Appendix B GPIB Commands 301Appendix B GPIB CommandsIntroduction ...303ABORT 7 (IFC) ...

302 Appendix B GPIB Commands

Appendix B GPIB Commands 303IntroductionAppendix B GPIB CommandsIntroductionThe BASIC language GPIB commands in this appendix are specifically f

ABORT 7 (IFC)304 Appendix B GPIB Commands ABORT 7 (IFC)Clears the multimeter's interface circuitry.Syntax ABORT 7Example ABORT 7 !CLEARS

Appendix B GPIB Commands 305LOCAL LOCKOUT (LLO)Examples LOCAL 7 !SETS GPIB REN LINE FALSE (ALL DEVICES GO TO LOCAL). (YOU MUST NOW EXECUTE REMOTE 7

SPOLL (Serial Poll)306 Appendix B GPIB Commands Examples REMOTE 7 !SETS GPIB REN LINE TRUEThe above line does not, by itself, place the multimeter i

Appendix B GPIB Commands 307TRIGGER (GET)TRIGGER (GET)If triggering is armed (see TARM command), the TRIGGER command (Group Execute Trigger) trigge

TRIGGER (GET)308 Appendix B GPIB Commands

Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches 309Appendix C Procedure to Lock Out Front/Rear Terminals and Guard T

Chapter 2 Getting Started 31If the self-test failed, one or more error conditions have been detected. Refer to the next section "Reading the Er

310 Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches

Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches 311Appendix C Procedure to Lock Out Front/Rear Terminals and Guar

312 Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches Covers RemovalProcedureDo the following:1. Remove any connecti

Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches 313Figure 36. 3458 Left sideFigure 37. Covers ground screws

314 Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches Guard PushrodRemovalProcedureIf you DO NOT wish to lockout the

Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches 315Figure 39. 3458 Inside bottom viewFigure 40. Guard switch and

316 Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches 3. Refer to Figure 42. Locate the pushrod for the Front/Rear T

Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches 317Figure 42. Front/rear terminal switch and pushrod locationFigu

318 Appendix C Procedure to Lock Out Front/Rear Terminals and Guard Terminal Switches Covers InstallationProcedureDo the following:1. Turn the 3458

Appendix D Optimizing Throughout and Reading Rate 319Appendix D Optimizing Throughout and Reading RateIntroducing the 3458A ...

32 Chapter 2 Getting Started (unshifted).Resetting theMultimeterMany times during operation, you may wish to return to the power-on state. The front

320 Appendix D Optimizing Throughout and Reading Rate

Appendix D Optimizing Throughout and Reading Rate 321Appendix D Optimizing Throughout and Reading Rate(From Product Note 3458A-1)In the past decade

322 Appendix D Optimizing Throughout and Reading Rate the speed of testing. For example, in many systems accuracy can be traded for speed; or flexib

Appendix D Optimizing Throughout and Reading Rate 323throughput and still provides 70% of the overhead programming like Statistical Quality Control

324 Appendix D Optimizing Throughout and Reading Rate track-and-hold path can accept signals up to 12 MHz. The track-and-hold path is limited to 16

Appendix D Optimizing Throughout and Reading Rate 325If NPLC is in the interval from 1 to 10, inclusive, then the NPLC is rounded up to the next in

326 Appendix D Optimizing Throughout and Reading Rate andDCV,20;RES.001(omitting the resolution parameter of the DCV command and using the RES comma

Appendix D Optimizing Throughout and Reading Rate 327Another feature of the 3458A is OffsetCompensated Ohms. Very much like auto zero in concept, o

328 Appendix D Optimizing Throughout and Reading Rate OptimizingThrough theTrack-and-HoldPath (DirectSampling andSubsampling)As stated earlier, the

Appendix D Optimizing Throughout and Reading Rate 329the resolution of the measurement is dependent upon the number of samples, this mode of operat

Chapter 2 Getting Started 33 We will use the Trig key to demonstrate how to use the configuration keys. Press:The display shows:This is the command

330 Appendix D Optimizing Throughout and Reading Rate Frequency andPeriodThe track-and-hold path is also the route the signal must take for frequenc

Appendix D Optimizing Throughout and Reading Rate 331storage. The transfer rate into and out of the Reading Memory and the GPIB transfer rate using

332 Appendix D Optimizing Throughout and Reading Rate Measurement List The most efficient method of using the 3458A within a system is to establish

Appendix D Optimizing Throughout and Reading Rate 333A BenchmarkThe benchmark used to show the affect of the various functions of the 3458A Multime

334 Appendix D Optimizing Throughout and Reading Rate 1 DCV <1 V ±.001% 1 ACV <10 V ±.1%1 DCV <10 V ±1%3 DCV <10 V ±.01%Benchmark Result

Appendix D Optimizing Throughout and Reading Rate 3351180 DIM A(37)1190 Exe_time=TIMEDATE1200 OUTPUT 722;"PRESET"1210 OUTPUT 722;"OH

336 Appendix D Optimizing Throughout and Reading Rate ...1940 OUTPUT 722;"DCV,10;NPLC 0;DELAY 0;NRDGS 3;TRIG SGL1950 Exe_time=TIMEDATE-Exe_time

Appendix D Optimizing Throughout and Reading Rate 337be:OUTPUT 722 USING "#,K"; "CALL 1"By using the image "#,K", the

338 Appendix D Optimizing Throughout and Reading Rate Still Faster A considerable increase in throughput can be had if you use TRANSFER statements i

Appendix D Optimizing Throughout and Reading Rate 339 350 PRINT "EXECUTION TIME =";Exe_time 360 PRINT "TRANSFER TIME = ";Tns_

34 Chapter 2 Getting Started Press:The display shows:When using the up or down arrow keys, if you step past the last parameter choice, a wraparound o

340 Appendix D Optimizing Throughout and Reading Rate 440 PRINT USING "44A,DD,DDD";"The transfer time using FOR NEXT is ";Tns_t

Appendix D Optimizing Throughout and Reading Rate 3411030 OUTPUT 722;"DCV, 10" 1040 FOR I=28 TO 331050 ENTER 722;A(l) 1060 NEXT I1070 OUT

342 Appendix D Optimizing Throughout and Reading Rate 1680 ENTER 722;A(27)1690 OUTPUT 722;"DCV,10;NPLC 0;DELAY 0"1700 FOR I=28 TO 331710 E

Appendix D Optimizing Throughout and Reading Rate 3432330 OUTPUT 722;"ACV 10;ACBAND 25000;DELAY .01;TRIG SGL" 2340 OUTPUT 722:"DCV,1

344 Appendix D Optimizing Throughout and Reading Rate 70 SUB Test_58(Time58) 80 DIM A(20),B(90),C(30),D(30),J$[80] 90 !SET UP SCANNER 100 ASSIG

Appendix D Optimizing Throughout and Reading Rate 345 660 OUTPUT @Dmm;"ACV 10"!Sets the dmm to 10 volts maximum input in acV 670 OUTPUT @

346 Appendix D Optimizing Throughout and Reading Rate

Appendix E High Resolution Digitizing With the 3458A 347Appendix E High Resolution Digitizing With the 3458AIntroduction ...

348 Appendix E High Resolution Digitizing With the 3458A

Appendix E High Resolution Digitizing With the 3458A 349Appendix E High Resolution Digitizing With the 3458A(From Product Note 3458A-2)Introduction

Chapter 2 Getting Started 35demonstrate numeric parameters. Press:This display shows:Notice that if you press the up or down arrow key, no parameter

350 Appendix E High Resolution Digitizing With the 3458A measurement-to-measurement jitter. Through the track-and-hold path, the 3458A can digitize

Appendix E High Resolution Digitizing With the 3458A 351Choice of Two Measurement PathsThe 3458A provides two different input measurement paths: th

352 Appendix E High Resolution Digitizing With the 3458A Using theTrack-and-HoldPath for Direct orSequentialSamplingThe track-and-hold path is the s

Appendix E High Resolution Digitizing With the 3458A 353digitizing, two additional commands are used for direct sampling and subsampling: SWEEP whi

354 Appendix E High Resolution Digitizing With the 3458A TRIG is the next condition to be satisfied. Only after both TARM and TRIG event conditions

Appendix E High Resolution Digitizing With the 3458A 355cycle. Two methods suggest themselves for this analysis: (1) sweep the entire frequency spe

356 Appendix E High Resolution Digitizing With the 3458A In addition to time domain analysis like frequency, risetime, pulse width, and overshoot, t

Appendix E High Resolution Digitizing With the 3458A 357The subprogram is one of the most powerful elements available in any programming language.

358 Appendix E High Resolution Digitizing With the 3458A Errors in MeasurementsThe flexibility of the 3458A helps you avoid or compensate for many o

Appendix E High Resolution Digitizing With the 3458A 3594. Trigger latency5. Aperture width6. Aperture jitterAmplitude Errors The input signal cond

36 Chapter 2 Getting Started The second parameter of the NRDGS command specifies the event that initiates each reading. Since this is not a numeric p

360 Appendix E High Resolution Digitizing With the 3458A An inescapable reality in any measurement is the attendant noise with increasing bandwidth.

Appendix E High Resolution Digitizing With the 3458A 361The 3458A offers two input paths. The differences are that the direct ADC path (DCV) offers

362 Appendix E High Resolution Digitizing With the 3458A The trigger error is orders of magnitude greater than timebase error and jitter. Two effect

INDEX 363INDEXAA/D converter, configuring the, 58ACbandwidth, 105current, 64measurements, configuring for, 62voltage, 62voltage method, specifying t

364 INDEXBinary coding, two’s complement, 92Buffering, external trigger, 88Burst complete, 113Bus, sending readings across the, 98CCablelengths, GPI

INDEX 365Defaulting parameters, 152DEFEAT, 168DEFKEY, 169DELAY, 170Delay time, 105Delayed readings, 86Deletingstates, 75subprograms, 74DELSUB, 171De

366 INDEXExecution, suspending subprogram, 72Exponential parameters, 35Externaltrigger buffering, 88triggering, 87EXTOUT, 178EXTOUT ONCE, 115EXTOUT

INDEX 367INBUF, 185Increasing the reading rate, 102Indication, overload, 96, 99Initial inspection, 15Inputresistance, fixed, 62terminals, selecting

368 INDEXMenu scroll, 36Methodsdigitizing, 129MFORMAT, 198MMATH, 199Mode, high-speed, 102MORE INFOannunciator, 27display, 39MORE INFO annunciator, 2

INDEX 369fuse, installing the line, 18fuse, replacing the line, 21line cycles, specifying, 59line fuses, 21requirements line, 17switch, 25Power-onse

Chapter 2 Getting Started 37eliminates the GPIB bus-related commands, commands that are seldom used from the front panel, and any commands that have

370 INDEXline power fuse, 21Requirementsgrounding, 17line power, 17RES, 224RESET, 225Reset key, 32Resetting the multimeter, 32Resistance, 56fixed in

INDEX 371resolution, 60, 68Specifying Resolution, when to, 69SREALexample, 93output format, 101SRQ, 27, 235annunciator, 27SSAC, 236SSDC, 236SSPARM?,

372 INDEXcommand, 152output, 99TEST, 254Test key, 30test, display, 32tilt stands, 20Time, delay, 105Timed readings, 85TIMER, 254TONE, 255Transferacr

Copyright © 1988, 1992, 1994, 2000 Agilent Technologies, Inc.All rights reserved.*03458-90014*Manual Part Number: 03458-90014Printed in U.S.A. E1200

38 Chapter 2 Getting Started Display Editing The Back Space key allows you to edit parts of a command string while entering the string or when the st

Chapter 2 Getting Started 39arrow keys.MORE INFO Display In addition to scrolling the display left and right, the Display/Window keys allow you to v

4Declares, that the productConforms with the following European Directives:The product herewith complies with the requirements of the Low Voltage Dire

40 Chapter 2 Getting Started User-Defined Keys You can assign a string of one or more commands to each of the USER keys labeled f0 - f9. After assign

Chapter 2 Getting Started 41this section. After editing the string, press the Enter key to execute the string. (The previous string is still assigne

42 Chapter 2 Getting Started Operating from RemoteThis section shows you the fundamentals of operating the multimeter from remote. This includes read

Chapter 2 Getting Started 43A typical display is:The displayed response is the device address. When sending a remote command, you append this addres

44 Chapter 2 Getting Started 30 ENDThe same technique allows you to get readings from the multimeter. Whenever the multimeter is making measurements

Chapter 3 Configuring for Measurements 45Chapter 3 Configuring for MeasurementsIntroduction ...

46 Chapter 3 Configuring for Measurements

Chapter 3 Configuring for Measurements 47Chapter 3 Configuring for MeasurementsIntroductionThis chapter shows how to configure the multimeter for

48 Chapter 3 Configuring for Measurements annunciator illuminates.Reading the ErrorRegistersWhen a hardware error is detected, the multimeter sets a

Chapter 3 Configuring for Measurements 49routine are:• The DCV routine enhances all measurement functions. This routine takes about 1 minute to perf

5PrefaceThis manual contains installation information, operating and programming information, and configuration information for the 3458A Multimeter.

50 Chapter 3 Configuring for Measurements the CALSTR command; this can be read later using the CALSTR? command.) The following example shows how to u

Chapter 3 Configuring for Measurements 51The multimeter will be damaged if any of the above maximum non-destructive inputs are exceeded.Guarding The

52 Chapter 3 Configuring for Measurements Presetting theMultimeterThe PRESET NORM command is similar to the RESET command but configures the multimet

Chapter 3 Configuring for Measurements 5330 ENDIn addition to the PRESET NORM command, the multimeter has a PRESET FAST command (configures for fast

54 Chapter 3 Configuring for Measurements OUTPUT 722;"ARANGE ONCE"Now when triggering begins, the multimeter will select the correct range

Chapter 3 Configuring for Measurements 55DC voltage measurements on the 1V range, send:OUTPUT 722;"DCV 1"* With FIXEDZ OFF. With FIXEDZ ON

56 Chapter 3 Configuring for Measurements OUTPUT 722;"DCI 10E-6"Resistance The multimeter measures resistance by supplying a known current

Chapter 3 Configuring for Measurements 572-Wire Ohms Two-wire ohms is most commonly used when the resistance of the test leads is much less than the

58 Chapter 3 Configuring for Measurements Configuring the A/DConverterThe A/D converter's configuration determines the measurement speed, resolu

Chapter 3 Configuring for Measurements 59the multimeter has a power line frequency of 60 Hz and the device being measured has a power line frequency

6

60 Chapter 3 Configuring for Measurements select the integration time that provides adequate speed while maintaining an acceptable amount of resoluti

Chapter 3 Configuring for Measurements 61For DC or ohms measurements (and analog AC measurements), resolution is determined by the A/D converter&apo

62 Chapter 3 Configuring for Measurements inaccurate 4-wire ohms measurements.Offset Compensation Because a resistance measurement involves measuring

Chapter 3 Configuring for Measurements 63frequency ranges shown in Table 15. Notice that when measuring AC+DC voltage using the analog method, for e

64 Chapter 3 Configuring for Measurements Analog RMS Conversion The analog RMS conversion directly integrates the input signal and is the method sele

Chapter 3 Configuring for Measurements 65measures the DC component and the AC component with frequencies > 10Hz. Notice that when measuring AC+DC

66 Chapter 3 Configuring for Measurements LEVEL command in Chapter 6 for more information.The following program configures the multimeter for frequen

Chapter 3 Configuring for Measurements 67important that the specified bandwidth (particularly the specified low frequency) corresponds to the freque

68 Chapter 3 Configuring for Measurements if you specify 60 PLCs of integration time, the multimeter averages six 10 PLC readings.Typically, you shou

Chapter 3 Configuring for Measurements 69For analog AC measurements, if you default, the %_ resolution parameter, the integration time will be that

Contents 7ContentsChapter 1 Installation and MaintenanceIntroduction ... 15Initial Inspectio

70 Chapter 3 Configuring for Measurements percent for the synchronous conversion method or 0.4 percent for the random conversion method.) The followi

Chapter 3 Configuring for Measurements 71Specifying RatioMeasurementsTo specify ratio measurements, you first select the measurement function for th

72 Chapter 3 Configuring for Measurements DCCUR1.10 OUTPUT 722;"SUB DCCUR1"20 OUTPUT 722;"MEM FIFO"30 OUTPUT 722;"TRIG HOLD&

Chapter 3 Configuring for Measurements 73Subprogram execution can also be resumed by sending the GPIB Group Execute Trigger (this does not in itself

74 Chapter 3 Configuring for Measurements The following program statement compresses the previously stored subprogram named DCCUR1.OUTPUT 722; "

Chapter 3 Configuring for Measurements 75OUTPUT 722;"RSTATE ACST1"From the front panel, you can view all stored state names by accessing t

76 Chapter 3 Configuring for Measurements • Subprogram complete• High or low limit exceeded• SRQ command executed• Power turned-on• Ready for instruc

Chapter 3 Configuring for Measurements 77which removed the error bit but left bit 6 set,Bit 7 (weight = 128) Data Available--a reading or query resp

78 Chapter 3 Configuring for Measurements enabled still respond to their corresponding conditions. They do not, however, set bit 6 or assert SRQ. The

Chapter 4 Making Measurements 79Chapter 4 Making MeasurementsIntroduction ... 81Triggering Mea

8 ContentsDeleting States ... 75Using the Input Buffer ... 75

80 Chapter 4 Making Measurements

Chapter 4 Making Measurements 81Chapter 4 Making MeasurementsIntroductionThis chapter discusses the methods for triggering measurements, the rea

82 Chapter 4 Making Measurements The Trigger ArmEventWhen the specified trigger arm event occurs, it arms the multimeter's triggering mechanism

Chapter 4 Making Measurements 83OUTPUT 722;"TARM AUTO”!Resumes readings suspended by TARM HOLD, PRESET FAST, or PRESET DIGorOUTPUT 722; "

84 Chapter 4 Making Measurements 50 OUTPUT 722;"NRDGS 10, AUTO" !10 READINGS/TRIGGER, AUTO SAMPLE EVENT60 OUTPUT 722;"TRIG SGL"

Chapter 4 Making Measurements 85"High-Speed Mode" later in this chapter for more information. In the following program, the PRESET NORM c

86 Chapter 4 Making Measurements with a 1 second interval between readings (this is shown in Figure 18).10 OPTION BASE 1 !COMPUTER ARRAY NUMBERING S

Chapter 4 Making Measurements 87Default Delays If you have not specified a delay interval, the multimeter automatically determines a delay time (de

88 Chapter 4 Making Measurements The following example uses EXT as the sample event. The trigger event is synchronous (selected by the PRESET NORM c

Chapter 4 Making Measurements 89Table 21. Event CombinationsTrigger ArmEventTriggerEventSampleEventDescriptionAUTO AUTO Any One reading is taken pe

Contents 9APER ...160ARANGE ...160AUX

90 Chapter 4 Making Measurements EXT LINE AUTO, EXT, TIMER,LINEAfter a negative edge transition on the Ext Trig input followed by the power line vol

Chapter 4 Making Measurements 91SGL SYN SYN After executing the TARM SGL command, followed by thecontroller requesting data2, which satisfies both

92 Chapter 4 Making Measurements Reading FormatsThis section discusses the ASCII, single integer (SINT), double integer (DINT). single real (SREAL),

Chapter 4 Making Measurements 93Single Real The single real (SREAL) format conforms to IEEE-754 specifications. This format has 32 bits, 4 bytes pe

94 Chapter 4 Making Measurements The SREAL number is then calculated by:-1 ´ 2-8 ´ 1.56471443177 = -6.1121657491E-3Double Real The double real (DREA

Chapter 4 Making Measurements 95clearing any stored readings by sending:OUTPUT 722;"MEM CONT"Memory Formats Readings can be stored in one

96 Chapter 4 Making Measurements • ASCII This memory format can be used for any measurement function/multimeter configuration. Since ASCII has the g

Chapter 4 Making Measurements 97in memory.10 OUTPUT 722;"TARM HOLD" !SUSPEND READINGS20 OUTPUT 722."DCV 1" !DC VOLTAGE, 1V RANG

98 Chapter 4 Making Measurements 10 OPTION BASE 1 !COMPUTER ARRAY NUMBERING STARTS AT 120 DIM Rdgs(200) !DIMENSION ARRAY FOR 200 READINGS30 OUTPUT

Chapter 4 Making Measurements 99Note When using the SINT or DINT memory/output format, the multimeter applies a scale factor to the readings. The