Racal Instruments 3162A/B, User Manual

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User Manual 3162A/B
Using The Instrument 3-24
Selecting the Trigger
Slope
The trigger slope command selects the sensitive edge of the trigger signal that
is applied to the TRIG IN connector. The Model 3162B can be made sensitive
to either positive or negative transitions. Use the following command to select
the sensitive edge for the trigger signal:
TRIGger:SLOPe {POSitive | NEGative}
Positive going transitions will trigger the Model 3162B when the POS option is
selected. Negative transitions will trigger the Model 3162B when the NEG
option is selected. POS is the default slope. In Gated mode, a high level will
gate the generator when the POS option is selected; a low level will when NEG
is selected.
The query:
TRIGger:SLOPe?
queries the trigger slope and returns POS or NEG.
Selecting the Trigger
Level
The trigger level command sets the threshold level at the trigger input
connector. Trigger levels are adjustable from -10 V to +10 V with up to 4 digits
of resolution. Trigger level resolution is always 10 mV. Use the following
command to set the trigger level for the trigger signal:
TRIGger:LEVel <value>
This sets the trigger level for the signal, which is applied at the TRIG IN
connector. The default value is 1.6 V, so there is no need to modify this value
if you apply a TTL level signal to the trigger input.
The query:
TRIGger:LEVel?
queries the trigger level and returns a value in Volts.
Using the Soft
Trigger
The soft trigger command allows you to write a program that can trigger the
3162B directly. To use the soft trigger command, place the instrument in the
TRIG:SOUR EXT mode. Soft triggers are ignored in the internal and TTLTrg<n>
modes. Use the following SCPI commands to trigger the instrument:
TRIGger