Specifying Signal Expression Targets
Signal expressions can be used to control digital port pins, specify trigger sources, control the
OnCouple/OffCouple signals, create user-defined protection functions, and generate user-defined
status signals.
Digital Port Pins
To control digital port pins using expressions (see Programming the Digital Port):
Front Panel Menu Reference SCPI Command
Select System\IO\DigPort\Pins.
Select a pin in the Pin field.
In the Function field, selectthe expression that will
control the pin.
To control a digital pins:
DIG<1-7>:FUNC EXPR<1-8>
Trigger Sources
To set output transient and measurement trigger sources using expressions (see Programming
Transients and Making Measurements):
Front Panel Menu Reference SCPI Command
Select Transient\TrigSource.
Select the expression that will trigger the transient from
Transient trigger sourcedropdown list.
Select the expression that will trigger the Arb from the
CD Arb trigger source dropdown list.
Measurement trigger sources cannot be selected from
the front panel.
To trigger transients using expressions:
TRIG:TRAN:SOUR EXPR<1-8>
To trigger Arbs using expressions:
TRIG:ARB:SOUR EXPR<1-8>
To trigger measurements using expressions:
TRIG:ACQ:SOUR EXPR<1-8>
OnCouple/OffCouple Signals
To control the instrument's output state (on or off) using expressions:
Front Panel Menu Reference SCPI Command
Select System\Signal\Couple.
Select the expression that will turn the output on from
the On couple source dropdown list.
Select the expression that will turn the output off from
the Off couple source dropdown list.
To turn the output on using expressions:
OUTP:COUP:ON:SOUR EXPR<1-8>
To turn the output off using expressions:
OUTP:COUP:OFF:SOUR EXPR<1-8>
4 Using the Advanced Power System
146 Keysight N6900/N7900 Series Operating and Service Guide
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