AMETEK BPS Series Programming Manual - Manual (Page 154)

AMETEK Programmable Power BPS / MX / RS Series SCPI Programming Manual
154 Manual P/N 7003-961 Rev AA
6.5.2 Initiating the Output Trigger System
When the source is turned on, the trigger subsystem is in the idle state. In this state, the
trigger subsystem ignores all triggers. Sending the following commands at any time returns
the trigger system to the Idle state:
ABORt
*RST
The INITiate commands move the trigger system from the Idle state to the Initiated state.
This enables the AC source to receive triggers. To initiate for a single triggered action, use:
INITiate:IMMediate
After a trigger is received and the action completes, the trigger system will return to the Idle
state. Thus it will be necessary to initiate the system each time a triggered action is desired.
To keep a trigger system initiated for multiple actions without having to send an initiate
command for each trigger, use:
INITiate:CONTinuous ON
Selecting the Trigger Source
The trigger system is waiting for a trigger signal in the Initiated state. Before generating a
trigger, a trigger source must be select.
To select IEEE-488 bus triggers (group execute trigger, device trigger, or *TRG command),
use:
TRIGger:SOURce BUS
To select a trigger source that is always true, use:
TRIGger: SOURce IMM
The immediate source can be combined with INITiate:CONTinuous ON to generate
repetitive output transients. A transition from the Initiated state to the Delay state is made
when the trigger signal is received.
6.5.3 Synchronizing Output Changes to a Reference Phase Angle
An output transient normally occurs immediately when the trigger signal is received. For
some applications it is desirable for the transient to be synchronized with a particular phase
of the output waveform such as the zero crossing point (0°) or the positive peak (90°).
To synchronize the start of a transient with a particular phase angle of the internal phase
reference, you must select PHASE as the trigger source. Use:
TRIGger:SYNC:SOURce PHASe
To select the desired phase, use:
TRIGger:SYNC: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: SYNC:SOURce IMMediate
When IMMediate is selected, the trigger system goes directly to the Output state. This is the
parameter selected at *RST.