3 Features and Functions
154 Keysight 34980A Mainframe User’s Guide
– You can specify a trigger count which sets the number of front-panel key
presses or scan trigger commands that will be accepted before terminating the
scan. See “Trigger Count” on page 157 for more information.
– Mx+B scaling and alarm limits are applied to measurements during a manual
scanning operation and all data is stored in volatile memory.
Front Panel Operation:
Scan (Configure) > INTERVAL > MANUAL
To initiate the scan and store all readings in memory, press the Scan (Measure)
key.
Note: To stop a scan, press and hold the Scan (Measure) key.
Remote Interface Operation:
The following program segment configures the
instrument for a manual scanning operation.
Then, send the *TRG (trigger) command to begin each scan sweep. The *TRG
command will not be accepted unless the internal DMM is in the
“wait-for-trigger” state.
Note: To stop a scan, send the ABORt command.
Scanning on Alarm
In this configuration, the instrument initiates a scan each time a reading crosses
an alarm limit on a channel. You can also assign alarms to channels on the digital
modules (34950A and 34952A). For example, you can generate an alarm when a
specific bit pattern or bit pattern change is detected on a digital input channel or
when a specific count is reached on a totalizer channel.
TRIG:SOURCE BUS
TRIG:COUNT 2
INIT
Select bus (manual) mode
Sweep the scan list 2 times
Initiate the scan
For complete details on configuring and using alarms, refer to
“Alarm Limits” on page 174.
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