HP 33120A User Manual page 24

Chapter 2 Remote Interface Operation
Simplified Programming Overview
To Phase Lock Using the Triggered Burst Mode
In the triggered burst mode, you can synchronize phase-lock signals
using an external trigger from the rear-panel Ext Trig terminal.
The following statements show you how to synchronize two function
generators in the triggered burst mode (send the commands to both
function generators):
"APPL:SIN 10E+3, 5.0"
"BM:NCYC INF"
"BM:STAT ON"
"TRIG:SOUR EXT"
Send the following command statement to only one function generator:
"OUTP:TRIG:IMM"
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Set both to the same frequency
Set burst count to "
INFINITY
Enable the burst mode
Set trigger source to external
Issue external trigger to all instruments
"