Keysight Technologies 3458A Guide D'utilisation page 352

6 Command Reference
mode
The mode parameter applies only to synchronous ACV or ACDCV. The choices are:
mode
parameter
AUTO
HOLD
[a] The time limit for synchronous AC or ACDCV is determined by the bandwidth specified using the ACBAND
Power-on mode = AUTO
Default mode = AUTO
Remarks
– For sub-sampling, the trigger event and the sample event are ignored. The
– For sub-sampling and synchronous AC measurements, bursts of samples are
– Query command: The SSRC? query command returns two responses
352
Numeric
query equiv.
[a]
1
4
command.
only triggering events that apply to sub-sampling are the trigger arm event
(TARM command) and the sync source event (SSRC command). For
synchronous ACV or ACDCV measurements (SETACV SYNC command), the
specified trigger arm event (TARM command), trigger event (TRIG command),
and sample event (NRDGS command) must all be satisfied before the sync
source event can initiate sampling.
taken on more than one period of the waveform. The sync source event
synchronizes these bursts to the periods of the input signal (that is, a sync
source event should typically occur once for each period).
separated by a comma. The first response is the present source. The second
response is the present mode. Refer to
chapter for more information.
Description
For synchronous AC or ACDCV (SETACV SYNC) using level
triggering (default mode), if the input signal is removed during a
reading and does not return within a certain amount of time, the
measurement method changes to random so that the reading can
be completed. (After the reading, the measurement method
returns to SYNC.)
The measurement method will not automatically change from
synchronous to random when the input signal is removed.
Query commands near the front of this
Keysight 3458A User's Guide