Agilent 33120A User's Guide

Chapter 3 Features and FunctionsBurst ModulationBurst SourceIn the external gated burst mode, the output waveform is either“on” or “off ” based on the level of the external signal applied to therear-panel Ext Trig terminal. When the gate signal is true, the functiongenerator outputs a continuous waveform. When the gate signal is false,the output is turned off.œ Burst source: Internal or External Gate. The default is Internal.œ When the internal burst source is selected, the external gated modeis disabled.œ When the external gate source is selected, the output is enabled ordisabled based on the logic level of the gate signal applied to theExt Trig terminal. When the gate signal is true (TTL high),the function generator outputs a continuous waveform. When thegate signal is false (TTL low), the output is turned off (zero volts orthe dc offset level).œ When the external gate source is selected, the burst count, burst rate,burst phase, and burst trigger source are ignored (these parametersare used for the triggered burst mode only).œ The Ext annunciator turns on when the function generator is waitingfor the external gate signal.3œ Front-Panel Operation:7: BURST SRC (MOD MENU)œ Remote Interface Operation:BM:SOURce {INTernal|EXTernal}83