User manual

IEEE-488 Reference
2001-900-01 Rev. K / August 2010 4-217
4.24.6 :SOURce <name>
:ARM[:SEQuence[1]][:LAYer[1]]:SOURce <name>Specify arm event control source
:ARM[:SEQuence[1]]:LAYer2:SOURce <name>Specify scan event control source
:TRIGger[:SEQuence[1]]:SOURce <name> Specify measure event control source
Parameters <name> = HOLD Hold operation in specified layer
= IMMediate Pass operation through specified layer
= MANual Select manual event
= BUS Select GPIB trigger as event
= TLINk Select Trigger Link as event
= EXTernal Select External Triggering as event
= TIMer Select timer as event (not available for arm layer).
Formats :arm:sour <name>
:arm:lay2:sour <name>
:trig:sour <name>
Defaults Power-up Saved power-on setup
*RST IMMediate (all layers)
:SYSTem:PRESet IMMediate (all layers)
Query :SOURce? Query programmed arm source.
Short-form formats: :arm:sour?
:arm:lay2?
:trig:sour?
Response message: HOLD, MAN, IMM, BUS, TLIN, EXT or TIM
Description These commands are used to select the event control source the specified layer. With HOLD selected, op-
eration will stop and wait indefinitely in the specified layer. While in HOLD, operation can be continued
by sending the :IMMediate command or the :SIGNal command. Keep in mind however, that if the layer
count is >1, HOLD will again be enforced when operation loops back around.
With IMMediate selected (do not confuse :SOURce IMMediate with :IMMediate), operation will imme-
diately pass through the specified layer.
NOTE
With the Immediate trigger source seleted, a “trigger ignored” message will be dis-
played if an external trigger is sent to the Model 2001 or a manual trigger (ie., pressing
TRIG key) occurs. The external or manual trigger is not used (ignored).
A specific event can be used to control operation through a layer. With BUS selected, operation will con-
tinue when a GPIB trigger (GET or *TRG) is sent. With TLINk selected, operation will continue when
an input trigger via the Trigger Link is received. With EXTernal selected, operation will continue when
an External Trigger is received.
A TIMer event is available for the scan and measure layers. With TIMer selected for the specified layer,
the event occurs at the beginning of the timer interval, and every time it times out. For example, if the
measure layer timer is programmed for a 30 second interval, the first pass through the measure layer con-
trol source will occur immediately. Subsequent scan events will then occur every 30 seconds. The inter-
val for the timer is set using the :TIMer command.
Programming example 10 OUTPUT 716; “:trig:sour imm; sour?”
20 ENTER 716; A$