Specifications

Subsystem Syntax
ARM
[:IMMediate]
:SOURce BUS | EXTernal | HOLD | IMMediate | SCP | TTLTrg<n>
:SOURce?
ARM[:IMMediate]
ARM[:IMMediate] arms the trigger system when the module is set to the
ARM:SOUR BUS or ARM:SOUR HOLD mode.
Comments
·
Related Commands: ARM:SOURCE, TRIG:SOUR
·
*RST Condition: ARM:SOUR IMM
Usage ARM:IMM After INIT, system is ready for trigger event
ARM Same as above (:IMM is optional)
ARM:SOURce
ARM:SOURce <arm_source> configures the ARM system to respond to the
specified source.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
arm_source discrete (string) BUS | EXT | HOLD | IMM | SCP
| TTLTrg<n>
none
Comments
·
The following table explains the possible choices.
Parameter Value Source of Arm
BUS ARM[:IMMediate]
EXTernal “TRG” signal on terminal module
HOLD ARM[:IMMediate]
IMMediate The arm signal is always true (continuous arming).
SCP SCP Trigger Bus (future SCP Breadboard)
TTLTrg<n> The VXIbus TTLTRG lines (n=0 through 7)
·
See note about ARM subsystem on page 204.
·
When TRIG:SOURCE is TIMER, an ARM event is required only to trigger the
first scan. After that the timer continues to run and the module goes to the Waiting
For Trigger State ready for the next Timer trigger. An ABORT command will
return the module to the Trigger Idle State after the current scan is completed. See
TRIG:SOURce for more detail.
VT1419A Command Reference
ARM
Chapter 6 205
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