Using CONFigure
The following example uses CONFigure and READ? to make an externally-triggered measurement. CONFig-
ure specifies DC voltage measurements but does not place the instrument in the "wait-for-trigger" state.
READ? places the instrument in the "wait-for-trigger" state, initiates a measurement when the rear-panel
Ext Trig input is pulsed (low by default), stores the measurement in reading memory, and transfers the
measurement to the instrument's output buffer. The default range (autorange) and resolution (10 PLC) are
used for the measurement.
CONF:VOLT:DC
TRIG:SOUR EXT
READ?
Typical Response: +4.27150000E+00
The following example is like the previous one, but it uses INITiate and FETCh? instead of READ?. The INITi-
ate command places the instrument in the "wait-for-trigger" state, triggers a measurement when the rear-
panel Ext Trig input is pulsed (low by default), and sends the measurement to reading memory. The
FETCh? query transfers the measurement from reading memory to the instrument's output buffer.
CONF:VOLT:DC
TRIG:SOUR EXT
INIT
FETC?
Typical Response: +5.34250000E+00
Storing measurements in reading memory with INITiate is faster than sending measurements to the instru-
ment's output buffer using READ? (provided you do not send FETCh? until done). The INITiate command is
also an "overlapped" command. This means that after executing INITiate, you can send other commands
that do not affect the measurements. This allows you to check for data availability before initiating a read
attempt that might otherwise time out. The FETCh? query waits until all measurements are complete to ter-
minate. You can store up to 1,000 measurements in the reading memory of the 34460A, 10,000 meas-
urements on the 34461A, 50,000 measurements on the 34465A/70A (without the MEM option), or
2,000,000 measurements on the 34465A/70A (with the MEM option).
The following example configures the instrument for 2-wire resistance measurements, triggers the instru-
ment to make one measurement using INITiate, and stores the measurement in reading memory. The 10
kΩ range is selected with 100 Ω resolution.
CONF:RES 10000,100
INIT
FETC?
Typical Response: +5.95850000E+03
SCPI Programming Reference
244
Keysight Truevolt Series Operating and Service Guide
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