Selecting The Trigger Slope; Using The Soft Trigger - Racal Instruments 3151 User Manual

3151 And 3151A User Manual
Selecting the
Trigger Slope
Using the Soft
Trigger
The trigger slope command selects the sensitive edge of the trigger
signal that is applied to the TRIG IN connector. The Model
3151/3151A can be made sensitive to either positive or negative
transitions. Use the following command to select the edge sensitivity
for the trigger signal:
TRIGger:SLOPe {POSitive | NEGative}
Positive going transitions will trigger the Model 3151/3151A when the
POS option is selected. Negative transitions will trigger the Model
3151/3151A when the NEG option is selected. POS is the default
slope.
The query:
TRIGger:SLOPe?
queries the trigger slope and returns POS or NEG.
There are a number of commands that are available to trigger the
Model 3151/3151A. The soft trigger command is one of them. To
use the soft trigger command, place the instrument in the
TRIG:SOUR EXT mode. Soft trigger is ignored in the internal or
TTLTrg<n> modes. Use the following SCPI commands to trigger the
instrument:
TRIGger
The IEEE-STD-488.2 common command *TRG will have the same
effect. Use either software command to trigger the Model
3151/3151A in Trigger, Burst and Triggered Sequence Advance
modes.
Using The Instrument 3-23