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1-36
Exercise 5 — Trigger and return a single reading
Exercise 6 — Trigger and return multiple readings
Trigger controlled measurements — The instrument is typically used in a non-
continuous trigger mode. In this mode, commands are used to trigger one or more read-
ings. After the specified number of readings are completed, the measurement process
stops.
Exercise 5 in
Exercise 6 in
readings.
Figure 1-7
Exercise 5 — Trigger and return a single reading
CALC:DATA?
Return result of MATH
calculation
1. If a MATH function is enabled, the result of the calculation will be returned
(MATH functions are covered in Section 5).
2. If there is no MATH function enabled, FETCh? and CALC:DATA? will return the basic
reading.
3. FETCh?, CALC:DATA? and DATA? do not trigger readings. They simply return the last
reading. If you again send one of these commands before triggering a new reading,
the old reading will be returned.
4. DATA:FRESh? can only be used once to return the same reading. Sending it again
Figure 1-7
provides a command sequence to trigger and return one reading.
Figure 1-8
provides a command sequence to trigger and return multiple
Trigger Configuration
Trigger Reading
FETCh?
OR
DATA:FRESh?
Return Basic Reading
1, 2, 3
without first triggering a new reading will cause error -230 (data corrupt or stale).
Model 2790 SourceMeter
INIT:CONT OFF
TRIG:COUN 1
SAMP:COUN 1
INIT
READ?
Trigger and Return
Reading
DATA?
OR
3,4
®
Switch System Reference Manual
Place 2790 in
non-continuous
trigger state
Set 2790 to perform
one measurement
Trigger and Return
1
Reading
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