HP 33120A, User Manual

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To trigger a burst or sweep
You can issue triggers from the front-panel for burst modulation and
frequency sweeps using
single trigger or internal trigger.
•
Internal or “automatic” triggering is enabled when you turn on the
function generator. In this mode, the function generator outputs
continuously when burst modulation or sweep is selected.
•
Single triggering outputs one burst or initiates one frequency sweep
each time you press
Single
. Continue pressing this key to re-trigger
the function generator.
•
Pressing
Single
to enable the single trigger mode also enables the
external trigger mode. External triggering is like the single trigger
mode except that you apply a trigger signal to the rear-panel Ext Trig
terminal. The function generator is triggered on the rising edge of a
TTL
pulse.
•
The
Single
key is disabled when in remote (the
Rmt
annunciator
turns on when in remote) and when a function other than burst
modulation or sweep is selected.
Trig annunciator is on when the
generator is waiting for single trigger
(internal trigger disabled).
Enables single trigger and
triggers the generator.
Enables internal trigger.
2
Chapter 2 Front-Panel Menu Operation
To trigger a burst or sweep
51