User`s manual

Operating Multiple AFGs Together
The DRIFT program shows how to operate multiple AFGs together to
synchronize their outputs to each other. One AFG (the master AFG) uses its
Reference Oscillator Output as the Reference Oscillator source for the
second AFG (the servant AFG). Thus, any frequency change caused by
drift of the master AFG reference results in the same amount of change in
the servant AFG. The master AFG generates a 1 MHz square wave; the
servant, a 500 KHz square wave.
The commands are:
1. Reset the Master and Servant AFGs
*RST
2. Setup the Master AFG For Output
[SOURce:]ROSCillator:SOURce INT2
TRIGger[:STARt]:SOURce INTernal2
[SOURce:]FREQuency[1]:FIXed <
frequency>
[SOURce:]FUNCtion[:SHAPe] SQUare
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude] <
amplitude>
3. Select the Master AFG’s Marker Source
[SOURce:]MARKer:ECLTrg<n>:FEED
“[SOURce:]ROSCillator”
This command selects the marker source for the ECLTrg0 trigger line
to output the Reference Oscillator clock pulses.
218 Marker Outputs/Multiple AFG Operations Chapter 6