Racal Instruments 3151, User Manual, Page: 42 / 136

3151 And 3151A User Manual
Using The Instrument 3-12
Activating the
Backplane ECLTRG
and TTLTRG
The Model 3151/3151A can transmit and receive signals on the
VXIbus ECLTRG and TTLTRG lines.
Use the following command to activate one of two backplane
ECLTRG lines:
OUTPut:ECLTrg<n> { OFF | ON}
<n> designates the activated trigger line; 0 and 1 are available. ON
enables the selected trigger line. The trigger source for this line can
be selected with the TRIG:SOUR command. The default ECLTrg<n>
state is OFF.
The query:
OUTPut:ECLTrg<n>?
queries the ECLTrg<n> state and returns "<n>,0" (OFF) or "<n>,1"
(ON).
Turning on ECLTRG0 causes the module sample clock signal to be
routed onto the VXI backplane. Other Model 3151/3151As may be
set up to receive this sample clock using the command
FREQ:RAST:SOURCE ECLTRG0 (See Selecting the Sample
Clock Source). ECLTRG1 should not be enabled onto the
backplane. Note that ECLTRG0 and ECLTRG1 are both used for
Inter-Module Synchronization.
The TTLTRG lines can be used to transmit and receive trigger
signals between the Model 3151/3151A and other VXIbus modules.
Use the following command to activate one of eight backplane
TTLTRG lines:
OUTPut:TTLTrg<n> { OFF | ON}
<n> designates the activated trigger line and 0 through 7 are
available. ON enables the selected trigger line. The trigger source for
this line can be selected with the TRIG:SOUR command. The default
TTLTrg<n> state setting is OFF.
The query:
OUTPut:TTLTrg<n>?
queries the TTLTRG<n> state and returns "<n>,0" (OFF) or "<n>,1"
(ON).