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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.
Immediate Triggering (TRIG:SOUR IMM)
TRIG:SOUR IMM sets immediate (internal)
triggering. The scan list is automatically
advanced. This is the default trigger mode.
Bus Triggering (TRIG:SOUR BUS)
TRIG:SOUR BUS defines trigger source as a
*TRG or HP-IB GET command. With
TRIG:SOUR BUS, the scan list is advanced for
each *TRG or GET command received.
External Triggering (TRIG)
TRIG:SOUR EXT sets external triggering. The trigger
source is a (user supplied) input to the Event In BNC.
Use a +5V 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 source is changed to BUS, HOLD, or
IMM.
Chapter 4
All manuals and user guides at all-guides.com
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 one channel per TRIG command.
Figure 4-2. Scanning Trigger Sources
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 after each channel closure
for ANY switchbox in the mainframe. The Trig Out port
outputs a +5V negative-going pulse.
Understanding the HP E1361A Matrix 31
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