Agilent Technologies 6813B, 6834B, 6814B, 6843A, 6811B, 6812B manual Specifying a Trigger Delay, 135

Programming Examples - 4

Specifying a Trigger Delay

A time delay can be programmed between the receipt of the trigger signal and the start of the output transient. At *RST the trigger delay is set to 0, which means that there is no delay. To program a delay, use:

TRIGger:SEQuence1:DELay .01or

TRIGger:TRANsient:DELay .01

which sets a delay time of 10 milliseconds.

NOTE: A trigger delay can only be programmed for SEQuence1 (or TRANsient) triggers.

When the programmed trigger delay has elapsed, the trigger system transitions from the Delay state to the Wait-for-sync state.

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 PHASeor

TRIGger:SYNChronize:SOURce PHASe

To select the desired phase, use:

TRIGger:SEQuence2:PHASe 90or

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.

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