Burst Trigger Source In the triggered burst mode, the function generator outputs a burst with the specified number of cycles (burst count) each time a trigger is received. After the specified number of cycles have been output, the function generator stops and waits for the next trigger. At power-on, the internally-triggered burst mode is enabled. ? Burst trigger source: Internal, External, or Manual. The default is Internal. ? When the Internal (immediate) source is selected, the frequency at which the burst is generated is determined by the burst period. ? When the External source is selected, the function generator will accept a hardware trigger applied to the front-panel Sync/Mod/Trig connector. The function generator outputs the specified number of cycles each time Sync/Mod/Trig receives a TTL pulse with the specified polarity. External trigger signals that occur during a burst are ignored. ? When the Manual source is selected, the function generator outputs one burst each time the front-panel Trigger key is pressed. ? When the External or Manual trigger source is selected, the burst count and burst phase remain in effect but the burst period is ignored. ? Front-Panel Operation: Press the Source softkey to select the desired source . To specify whether the function generator triggers on the rising or falling edge of the signal on the Sync/Mod/Trig connector, select the desired edge by pressing the Slope softkey.
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