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Handshake Triggering (TRIG:SOUR BUS)
Uses digital bus on faceplate of multiplexer
module. Channel Advance and Channel
Closed continuously handshake with
Voltmeter Ready and Voltmeter Complete until
scanning list has completed specified number
of cycles.
Advancing Scan (TRIG[:IMM]
This command advances the scan list
when in TRIG:SOUR HOLD or
TRIG:SOUR BUS. Advances the scan
list one channel per command.
Bus Triggering (TRIG:SOUR BUS)
Defines Trigger source as *TRG or HP-IB
GET command executed over the HP-IB.
The scan list is advanced one channel for
each *TRG or GET command received.
Enabling Trig Out Port (OUTP ON)
Generates a +5V negative-going pulse each
time a channel advances. OUTP ON reserves
the Trig Out Port so it is not available for any
other instrument in the mainframe.
As an alternative to OUTP ON, the Channel
Closed on the digital bus also pulses for each
channel closure.
Immediate Triggering (TRIG:SOUR IMM)
Sets immediate internal triggering. The scan
list is automatically advanced through the
scan list. Due to the high speed of the FET
multiplexer, this mode should be used with
consideration for the capability of the
multimeter. This is the default trigger mode.
Trigger Hold (TRIG:SOUR HOLD)
Prevents execution of triggers until
trigger source is changed. Can use
TRIG[:IMM] command to trigger a
switchbox set to TRIG:SOUR HOLD.
External Triggering (TRIG:SOUR EXT)
Trigger source is a user supplied input to
the Event In BNC. Use a +5V
negative-going pulse to trigger.
TRIG:SOUR EXT reserves the Event In
resource so it is not available for any other
instrument in the mainframe.
Figure 4-2. Trigger Sources
Chapter 4 Understanding the HP E1351A/53A FET Multiplexer Modules 47