3 Features and Functions
152 Keysight 34980A Mainframe User’s Guide
Scan Trigger Source
You can configure the event or action that controls the onset of each sweep
through the scan list (a sweep is one pass through the scan list):
– You can set the instrument’s internal timer to automatically scan at a specific
interval. You can also program a time delay between channels in the scan list
(see “Channel Delay” on page 161).
– You can manually control a scan by repeatedly pressing the Scan (Measure)
key from the front panel.
– You can start a scan by sending a software command from the remote
interface (MEASure? or INITiate command).
– You can start a scan when an external TTL trigger pulse is received.
– You can start a scan when an alarm event is logged on the channel being
monitored.
Interval Scanning
In this configuration, you control the frequency of scan sweeps by selecting a wait
period from the start of one trigger to the start of the next trigger (called the
trigger-to-trigger interval). If the scan interval is less than the time required to
measure all channels in the scan list, the instrument will scan continuously, as fast
as possible (no error is generated).
Trigger-to-trigger interval
– You can set the scan interval to any value between 0 seconds and 99:59:59
hours (359,999 seconds), with 1 ms resolution.
t
Sweep 1
Trigger 1
Sweep 2
Sweep
n
Trigger 2
. . .
Trigger Timer
(0 to 359,999 seconds)
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