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
NOTE
To stop a scan, send the
ABORt
command.
Ext Trig Input
Gnd
Input
Ext Trig Connector
> 1 ms
5V
0V
