HP 33120A, User Manual

Page: 88 / 118

Sweep Trigger Source
In the triggered sweep mode, the function generator outputs a single
sweep each time a trigger is received. After one sweep from the start
frequency to the stop frequency, the function generator waits for the
next trigger while outputting the start frequency.
•
Sweep trigger source:
Internal
, Single, or External. The default
is Internal.
•
When the internal trigger source is enabled (default), the function
generator outputs a continuous sweep at a rate determined by the
sweep rate specified.
•
Pressing
Single
to enable the single trigger mode also enables the
external trigger mode. External triggering is like the front-panel
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
Trig
annunciator turns on when the function generator is waiting
for a single or external trigger.
•
Front-Panel Operation : Pressing
Single
to enable the single
trigger mode also enables the external trigger mode.
Press
Shift Internal
to enable the internal trigger mode.
•
Remote Interface Operation :
TRIGger:SOURce {IMMediate|EXTernal|BUS}
See “Triggering” on page 98 for more information.
3
Chapter 3 Features and Functions
Frequency Sweep
97