Cmd3-Sample And Trigger Setup - Texas Instruments CBL Manual Book

CMD3—Sample and Trigger Setup
CMD3 Syntax and Parameters
{3,sample_time,number_samples,trigger_type,trigger_channel,
trigger_threshold,prestore, external_clock,record_time,filter}
Sample Time (sec)
0.5
0 = External clock
1
Range
.00010–.2
.25–16000
Trigger Threshold
0 = N/A if trigger = 0, 1, 6, or digital
nibble.
1V, 1A, 1KJ if Trig. Type = 2, 3, 4, 5,
and Trig. Channel = 1, 2, 3, 21.
L10 to 10 Volts if volts selected.
L10 to 10 Amps if current selected.
1 to 100 Kohms if resistance sel.
1
Range restrictions apply. (See "Sample Time" on page 51, and Appendix A,
"Determining the Minimum Sample Time.")
2
Limit is 256 if Stats is selected in
3
If the trigger type is a digital nibble,
channel regardless of value enter for Trigger Channel.
4
The trigger threshold for period and frequency is limited to 7 levels (5.0, 1.0, 0.2, 0,
L0.2, L1.0, L5.0 for voltage and corresponding values for current and resistance). The
trigger threshold in the setup string is rounded to the nearest value.
5
or Stats is requested, or number of samples is L1, the default (no filtering) is
If CH31
used.
80 CBLé System Guidebook
Number of
2
Samples
1–512
L1 causes continuous
data collection following
each Get( or Input
"CBLGET" instruction.
Prestore
4
Data %
0–100%
CMD1
Trigger Type
0= None
1= Manual
2= + +
3= NN
4= + N
5= N +
6= Manual trigger and
sample
1nnnn = digital nibble,
where:
n= 0,1 is data,
n= 2–9 is don't care.
External
Clock
Source
0= External
clock
1= Analog
input, CH1
.
is automatically selected as the trigger
CH21
3
Trigger Channel
0= n/a
1–3, 21
1–3= Analog Input
21= External Clock
Record
Time
0= None
1= Absolute
2= Relative
3
5
Filter
0–6