Agilent 33120A User's Guide

Chapter 3 Features and FunctionsBurst ModulationBurst CountThe burst count defines the number of cycles to be output per burst.Used only in the triggered burst mode (internal or external source).Certain combinations of burst count and carrier frequency are notallowed. If you attempt to specify a burst count that is not valid,the function generator will automatically adjust the count tothe maximum value allowed with the present carrier frequency.Make sure you note the restrictions in “Burst Carrier Frequency” startingon page 85 before setting the burst count.3œ Burst count: 1 to 50,000 cycles, in 1 cycle increments. You can alsoselect an infinite burst count. The default is 1 cycle.œ When the internal trigger source is selected, the specified number ofcycles is output continuously at a rate determined by the burst ratesetting. The burst rate frequency defines the interval between bursts.œ When the single or external trigger source is selected, the burst countand burst phase remain in effect but the burst rate is ignored. Thespecified number of cycles is output each time Single is pressed orwhen a trigger signal is applied to the Ext Trig terminal. The functiongenerator is triggered on the rising edge of a TTL pulse.œ When the external gate burst source is selected, the burst count,burst rate, burst phase, and burst trigger source are ignored(these parameters are used for the triggered burst mode only).œ Front-Panel Operation:4: BURST CNT (MOD MENU)œ Remote Interface Operation:BM:NCYCles {|INFinity|MINimum|MAXimum}87