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Trigger Hold (TRIG:SOUR HOLD)
TRIG:SOUR HOLD prevents
execution of triggers until trigger
source is changed. Can use TRIG
command to trigger a switchbox
set to TRIG:SOUR HOLD.
Advancing Scan (TRIG)
Can use TRIG command to advance
the scan list when switchbox is in
TRIG:SOUR HOLD or TRIG:SOUR
BUS. For either trigger source, the
scan list advances on channel per
TRIG command.
Bus Triggering (TRIG:SOUR BUS)
TRIG:SOUR BUS defines trigger
source as a *TRG or GET
command executed over GPIB.
With TRIG:SOUR BUS, the scan
list is advanced for each *TRG or
GET command received.
Enabling Trig Out Port (OUTP ON)
The Trig Out Port is shared by all
instruments in the mainframe. With the
port enabled (with OUTP ON), it
generates an output trigger each time
after a channel closure for ANY
switchbox in the mainframe. The TRIG
OUT port outputs a +5 V
negative-going pulse.
Immediate Triggering (TRIG:SOUR IMM)
TRIG:SOUR IMM sets immediate (internal)
triggering. The scan list is automatically
advanced. This is the default trigger mode.
External Triggering (TRIG)
TRIG:SOUR EXT sets external
triggering. The trigger source is a (user
supplied) input to the Event In BNC.
Use a +5 V negative going pulse to
trigger.
With two or more switchboxes in a
mainframe, the first switchbox set for
EXT trigger keeps the trigger resource
until the switchbox trigger source is
changed to BUS, HOLD, or IMM.
Figure 4-2. Scanning Trigger Sources
Chapter 4 Understanding the Agilent E1364A Form C Switch 35