Technical data

Remote Interface Reference 3
Triggering
E364xA User’s and Service Guide 89
• To trigger the power supply from the remote interface
(GPIB or RS- 232) after selecting the bus source, send the
*TRG (trigger) command. When *TRG is sent, the trigger
action starts after the specified time delay if any delay is
given.
• You can also trigger the power supply from the GPIB
interface by sending the IEEE- 488 Group Execute Trigger
(GET) message. The following statement shows how to
send a GET from a Hewlett- Packard controller.
TRIGGER 705 (group execute trigger)
• To ensure synchronization when the bus source is
selected, send the *WAI (wait) command. When *WAI is
executed, the power supply waits for all pending
operations to complete before executing any additional
commands. For example, the following command string
guarantees that the first trigger is accepted and is
executed before the second trigger is recognized.
TRIG:SOUR BUS;*TRG;*WAI;*TRG;*WAI
• You can use the *OPC? (operation complete) query or the
*OPC command to indicate when the operation has
completed. The *OPC? query returns 1 to the output
buffer when the operation has completed. The *OPC
command sets the OPC bit (bit 0) in the Standard Event
register when the operation has completed.
Immediate triggering
• To select the immediate trigger source, send the following
command:
TRIG:SOUR IMM
• When IMMediate is selected as a trigger source, an
INITiate command immediately transfers the
VOLT:TRIG or CURR:TRIG value to the VOLT or CURR
value. Any delay is ignored.