Agilent 33120A User's Guide

Chapter 3 Features and FunctionsBurst ModulationBurst ModulationYou can configure the function generator to output a waveform with aspecified number of cycles, called a burst. You can output the burst at arate determined by the internal rate generator or an external signalapplied to the rear-panel connector. The function generator can producea burst using sine, square, triangle, ramp, and arbitrary waveforms.For more information on the fundamentals of Burst Modulation,refer to chapter 7, “Tutorial”.You can use burst modulation in the following two modes. The functiongenerator enables one burst mode at a time based on the trigger sourceand burst source that you select (see the table below).3œ Triggered Burst Mode: In this mode, the function generator outputsa waveform with a specified number of cycles (burst count) each timea trigger is received. After the specified number of cycles has beenoutput, the function generator waits for the next trigger. You canconfigure the function generator to accept an internal trigger or youcan send the trigger externally by pressing the front-panel Single keyor by applying a trigger signal to the rear-panel Ext Trig terminal.At power-on, the internally-triggered burst mode is enabled.œ External Gated Burst Mode: In this mode, the output waveform iseither “on” or “off ” based on the level of the external signal applied tothe rear-panel Ext Trig terminal. When the gate signal is true,the function generator outputs a continuous waveform. When thegate signal is false, the output is turned off.Trigger Source(TRIG:SOUR)Burst Source(BM:SOUR)Burst Count(BM:NCYC)Burst Rate(BM:INT:RATE)Burst Phase(BM:PHAS)External Triggered Mode External Internal Available Not Used AvailableInternal Triggered Mode Internal Internal Available Available AvailableExternal Gated Mode Internal External Not Used Not Used Not Used81