Using CONFigure
The following example uses CONFigure and READ? to make an externally-triggered measurement. The CONFigure
command configures DC voltage measurements but does not place the instrument in the "wait-for-trigger" state.
The READ? query 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 INITiate
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 instrument'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. Note that the FETCh? query waits until all measurements are complete to terminate. You can store up to
1,000 measurements in the reading memory of the 34460A or 10,000 measurements on the 34461A.
The following example configures the instrument for 2-wire resistance measurements, triggers the instrument 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
138 Agilent Truevolt Series DMM Operating and Service Guide
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