FDI2056 Use
r’s Manual
v 2.0 r 1.1
– 03/13
Copyright © 2013 Metrolab Technology SA
18
www.metrolab.com
INTernal
Specifies that the arm source is fed internally. Used only on an
instrument having multiple channels which need to work
synchronously.
TIMer
Specifies that the arm source is fed by the internal periodic
signal source. The rate at which this source ticks is set using
the command
TRIGger#[:SEQuence]:TIMer[:RATE]
.
BUS
Specifies that the arm source is software triggered. The
command generating this trigger is
*TRG
.
Example
ARM:SOUR IMM
Sets the arm event to IMMediate.
ARM:SOUR? OPTions
The above command will return the following string:
IMMediate|SYNChro|ENCoder|EXTernal|INTernal|TIMer|BUS
:ARM#[:SEQuence][:LAYER]:ENCoder
3-7-3
Sets the encoder position at which the arm detection layer is satisfied, letting the
system enter the trigger layer.
Syntax
ARM#:ENCoder
numerical value (no units)
ARM#:ENCoder?
[DEFault]
Default
0
Arguments
The
numerical value
represents the absolute position of the encoder expressed as
a number of internal pulses. Four (4) pulses are generated for every encoder line. A
1024-line encoder will generate 4096 internal pulses.
Example
ARM:ENCoder 127
As soon as the absolute position 127 is reached, the system will
instantly process the trigger-related instructions.
:ARM#[:SEQuence][:LAYER]:SYNChro[:SLOPe]
3-7-4
Configures the transition detector of the synchronization signal to generate an
arm-condition on a specific slope.
Syntax
ARM#:
SYNChro
POSitive|NEGative|EITHer|NONe|DEFault
