Keysight Technologies 3458A Guide D'utilisation page 353

Command Reference 6
– Related commands: LEVEL, LFILTER, SETACV SYNC, SLOPE, SSAC, SSDC
Examples
In the program on the following page, the SSAC command is used to digitize a 10
kHz signal with a peak value of 5 V. The SWEEP command instructs the
multimeter to take 1000 samples (Num_samples variable) with a 2 µs
effective_interval (Eff_int variable). The measurement uses the default level
triggering for the sync source event (trigger from input signal, 0%, AC-coupling,
positive slope). Line 120 generates a SYN event and transfers the samples directly
to the computer. Lines 240 through 410 sort the sub-sampled data to produce the
composite waveform. The composite waveform is stored in the Wave_form array.
10 OPTION BASE 1 !COMPUTER ARRAY NUMBERING STARTS AT 1
20 INTEGER Num_samples,Inc,I,J,K,L !DECLARE VARIABLES
30 Num_samples=1000 !DESIGNATE NUMBER OF SAMPLES
40 Eff_int=2.0E-6 !DESIGNATE EFFECTIVE INTERVAL
50 INTEGER Int_samp(1:1000) BUFFER !CREATE INTEGER BUFFER
60 ALLOCATE REAL Wave_form(1:Num_samples) !CREATE ARRAY FOR SORTED
70 DATA ALLOCATE REAL Samp(1:Num_samples) !CREATE ARRAY FOR SAMPLES
80 ASSIGN @Dvm TO 722 !ASSIGN MULTIMETER ADDRESS
90 ASSIGN @Int_samp TO BUFFER Int_samp(*) !ASSIGN BUFFER I/O PATH NAME
100 OUTPUT @Dvm;"PRESET FAST;LEVEL;SLOPE;SSRC LEVEL;SSDC 10"
101 !FAST OPERATION, TARM SYN, LEVEL SYNC SOURCE 0 V, POSITIVE SLOPE
105 !(DEFAULT VALUES) SUB-SAMPLING(SINT OUTPUT FORMAT), 10 V RANGE
110 OUTPUT @Dvm;"SWEEP ";Eff_int,Num_samples
115 !2 µs EFFECTIVE INTERVAL, 1000 SAMPLES
120 TRANSFER @Dvm TO @Int_samp;WAIT !SYN EVENT,TRANSFER READINGS INTO
121 !INTEGER ARRAY; SINCE THE COMPUTER'S INTEGER FORMAT IS THE SAME AS
125 !SINT, NO DATA CONVERSION IS NECESSARY HERE (INTEGER ARRAY REQUIRED)
130 OUTPUT @Dvm;"ISCALE?" !QUERY SCALE FACTOR FOR SINT FORMAT
140 ENTER @Dvm; S !ENTER SCALE FACTOR
150 OUTPUT @Dvm;"SSPARM?" !QUERY SUB-SAMPLING PARAMETERS
160 ENTER @Dvm;N1,N2,N3 !ENTER SUB-SAMPLING PARAMETERS
Keysight 3458A User's Guide 353