Features and Functions
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Keysight 34980A Mainframe User’s Guide
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– If the instrument receives an external trigger before it is ready to accept one, it
will buffer one trigger and then ignore any additional triggers received (no
error is generated).
– All readings from the scan are stored in volatile memory. Readings accumulate
in memory until the scan is terminated (until the scan count is reached or until
you abort the scan).
– Mx+B scaling and alarm limits are applied to measurements during the scan
and all data is stored in volatile memory.
Front Panel Operation:
Scan (Configure) > INTERVAL > EXTERNAL
To initiate the scan and store all readings in memory, press the
Scan (Measure)
key. Between scan sweeps, “WAITING FOR TRIG” will be displayed on the front
panel. When a TTL pulse is received, the scan starts and readings are stored in
memory.
Note:
To stop a scan, press and hold the
Scan (Measure)
key.
Remote Interface Operation:
The following program segment configures the
instrument for an external scan.
Note:
To stop a scan, send the
ABORt
command.
Trigger Count
You can specify the number of triggers that will be accepted by the internal DMM
before returning to the “idle” state. The trigger count applies to both scanning and
stand-alone DMM measurements (with no scan list).
– Select a trigger count between 1 and 500,000 triggers, or continuous.
– You can store at least 500,000 readings in memory and all readings are
automatically time stamped. If memory overflows, the new readings will
overwrite the first (oldest) readings stored; the most recent readings are
always preserved.
– You can specify a trigger count in conjunction with a sample count and a
sweep count. The three parameters operate independent of one another, and
TRIG:SOURCE EXT
TRIG:COUNT 2
INIT
Select external mode
Sweep the scan list 2 times
Initiate the scan
