Features and Functions 4
Keysight 34970A/34972A User’s Guide 113
Then, send the *TRG (trigger) command to begin each scan sweep. You can
also trigger the instrument from the GPIB interface by sending the IEEE-488
Group Execute Trigger (GET) message. The following statement shows how to
send a GET message.
External scanning
In this configuration, the instrument sweeps through the scan list once each time
a low-going TTL pulse is received on the rear-panel Ext Trig Input line (pin 6).
– You can specify a scan count which sets the number of external pulses the
instrument will accept before terminating the scan. See “Scan Count” on page
117 for more information.
– If the instrument receives an external trigger before it is ready to accept one, it
will buffer one trigger before generating an error.
– All readings from the scan are stored in non-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 non-volatile memory.
TRIGGER 709 Group Execute Trigger
To stop a scan, send the ABORt command.
Ext Trig Input
Gnd
Input
Ext Trig Connector
> 1 ms
5V
0V
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