User`s manual

Gating Trigger
Signals
Gating is the process of suspending the output waveform. When the gate is
active, AFG triggering is suspended. The output remains at the last
amplitude point triggered. When the gate is inactive, the output resumes
with the next amplitude point.
The gating commands are frequency coupled and are executed relative to
other AFG commands as shown in Figure 5-3.
The GATE example shows how to use the AFG’s “Gate In” BNC to
suspend AFG triggering and thus, generation of the output signal. A high
(TTL levels) on the BNC activates the gate.
The steps of program are as follows:
1. Set the reference oscillator source
[SOURce:]ROSCillator:SOURce <source>
2. Set the (start) trigger source
TRIGger[:STARt]:SOURce <source>
3. Set the trigger gating source
TRIGger[:STARt]:GATE:SOURce <source>
4. Set the gating signal polarity
TRIGger[:STARt]:GATE:POLarity <polarity>
5. Enable trigger gating
TRIGger[:STARt]:GATE:STATe <mode>
6. Set the output frequency
[SOURce:]FREQuency[1][:CW | :FIXed] <frequency>
7. Set the output function
[SOURce:]FUNCtion[:SHAPe] <shape>
8. Set the number of waveform points
[SOURce:]RAMP:POINts <number>
9. Set the signal amplitude
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude] <amplitude>
10. Place the AFG in the wait-for-arm state
INITiate[:IMMediate]
Chapter 5 Arming and Triggering 183