Keysight Technologies 6811C

5 Programming Examples
248 Keysight Models 6811C, 6812C, and 6813C Programming Guide
Synchronizing output changes to a reference phase angle
An output transient normally occurs immediately when the trigger signal is
received, or after the delay has expired if a trigger delay has been set. For some
applications it is desirable that the transient is synchronized with a particular
phase of the output waveform such as the zero crossing point or the positive peak.
To synchronize the start of a transient with a particular phase of the internal phase
reference, you must select PHASE as the trigger source. Use:
TRIGger:SEQuence2:SOURce PHASe or
TRIGger:SYNChronize:SOURce PHASe
To select the desired phase, use:
TRIGger:SEQuence2:PHASe 90 or
TRIGger:SYNChronize:PHASe 90
which specifies the 90 degree phase angle of the internal phase reference as the
point where the transient begins.
To turn off transient phase synchronization, use:
TRIGger:SYNChronous:SOURce IMMediate
When IMMediate is selected, the trigger system transitions through the Delaying
and Wait-for-sync states and goes directly to the Output state. This is the
parameter selected at *RST.
Generating output triggers
Providing that you have specified the appropriate trigger source, you can generate
triggers as follows:
Single triggers
– By sending one of the following over the GPIB:
TRIGger:SEQuence1:IMMediate
<GET>
(Group Execute Trigger)
– By applying a signal with a high-to-low transition to the Trig In BNC
connector.