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3151 And 3151A User Manual
Using The Instrument 3-13
Assigning the
Validating Source
For TTLTRG
The TTLTRG signals, when enabled and placed on the backplane,
can be asserted with signals coming from a number of sources. Use
the following command to assign the signal source for the active
TTLTRG line:
OUTPut:TRIGger:SOURce {BIT | LCOMplete |
INTernal | EXTernal}
BIT
Generates a trigger signal at any point in
the waveform. The trigger position within the
waveform can be programmed using the
OUTPUT:SYNC:POS:POIN command. This
command is used to set both the TRIGger point
and the SYNC point.
LCOMplete
Generates a trigger signal in SEQuence
mode only once when the selected segment
appears for the first time.
INTernal
Generates a trigger signal at intervals set by the
internal trigger generator .
EXTernal Generates a trigger signal every time a trigger is
applied to the front panel TRIG IN connector.
The query:
OUTPut:TRIGger:SOURce?
queries the validating signal source for the backplane TTLTRG<n>
lines and returns BIT, LCOM, INT or EXT.
Enabling the Main
Output
For safety reasons, the main output default setting is OFF. Disable or
enable the main output using the following command:
OUTPut {OFF | ON}
When the main output state is programmed to ON, the output
connector is connected to the output amplifier through a 50
Ω
resistor.
In the OFF position, the output connector is disconnected from the
output amplifier by means of a mechanical relay. Ensure that voltage
is not applied to the main output connector when the Model
3151/3151A output state is programmed to ON.
The query:
OUTPut?
queries the state of the main output and returns "0" (OFF) or "1"
Summary of Contents for 3151
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