4
Features and Functions
110
Keysight 34970A/34972A User’s Guide
Scan interval
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.
– You can manually control a scan by repeatedly pressing
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 sweep to the start of the next sweep (called the
scan-to-scan interval
). The countdown time is shown on the front-panel display
between one scan sweep and the start of the next sweep. 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).
– You can set the scan interval to any value between 0 seconds and 99:59:59
hours (359,999 seconds), with 1 ms resolution.
Scan List (1 sweep)
Scan-to-Scan interval
(0 to 99:59:59 hours)
Scan Count
1 to 50,000 scans, or continuous)
t
