TRIGger3:SOURce {IMMediate | EXTernal | BUS | INTernal | ALARm[{1|2|3|4}] | (@<channel>)},
(@<ch_list>)
TRIGger3:SOURce? (@<ch_list>)
Sets the trigger source for module digitizing on the specified channels.
These SCPIs are supported on the DAQM909A Digitizer module only.
Parameter Typical return
{IMMediate | EXTernal | BUS | INTernal | ALARm[{1|2|3|4}] | (@<channel>)}
IMMediate = Continuous trigger
EXTernal = An external TTL-compatible pulse trigger
BUS = Software trigger
INTernal=Trigger when an input signal crosses the specified trigger level at the specified slope
ALARm = Trigger on alarm 1,2,3, or 4
(@<channel>) = Trigger when <channel> (master channel) is triggered
Default: IMMediate
"IMM", "EXT", "BUS", "INT", "ALAR1",
"ALAR2", "ALAR3", or "ALAR4".
Selects the external trigger source.
TRIG3:SOUR EXT,(@201)
INIT3 (@201)
Typical response: EXT
Selects the bus (software) trigger source.
TRIG3:SOUR BUS,(@201)
INIT3 (@201)
*TRG
Typical response: BUS
– For the EXTernal source, there is an Ext Trig connector on each digitizer module that can accept hardware trig-
ger signal.
– For the ALARm<n> source, trigger occurs when an alarm is generated by multiplexer modules or the mul-
tifunction module. Digitizer module does not generate alarm.
– For the (@<channel>) source, trigger occurs when the master channel receives trigger. Any channel from the
same or another digitizer module can be selected as master channel provided its trigger source is not IMMe-
diate. But, a channel is not allowed to be the master channel for itself.
348
Keysight DAQ970A/DAQ973A Programming Guide
2 SCPI Programming
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