GW Instek AFG-3000 Series - Manual (Page 107)

MODULATION
107
4. Press F3 (ON/OFF).
5. To choose the trigger edge,
press F1 (Rise) or F2 (Fall).
~
Note When an internal trigger source is selected, a
square wave with a 50% duty cycle is output at the
beginning of each sweep from the Trig out
terminal. The waveform frequency is equal to the
sweep time.
Using an external trigger source will disable the
trig out signal.
When the manual trigger is selected, a >1us pulse
is output from the trig out terminal at the start of
each sweep or burst.