• Internal or “automatic” triggering is enabled when you turn on the
function generator. In this mode, the function generator outputs
continuously when the sweep or burst mode is selected.
• External triggering uses the rear-panel Trig In connector to control
the sweep or burst. The function generator initiates one sweep or
outputs one burst each time Trig In receives a TTL pulse. You can
select whether the function generator triggers on the rising or falling
edge of the external trigger signal.