Tabor Electronics 5064, Руководство пользователя

Страница: 92 / 369

3
Using the Instrument
Selecting a Run Mode
3-21
Gated Mode
When set to gated mode, the 2074 output remains at a DC level as
long as the rear-panel TRIG IN signal remains inactive. The output
gates on and off between two transitions, either positive or
negative, depending on the slope setting. Only the rear panel TRIG
IN connector can be used for operating the gated mode.
When placed in gated mode, the generator idles on a DC level until
the first gate on transition. The signal will complete after the gate off
transition and the generator will once again resume DC level equal
to the last point of the waveform.
There are two parameters you can adjust for the gated mode:
Source
– defines the gating signal source. Since the gated run
mode relies on hardware transitions, only EXT is a valid source
for the gated mode.
Slope
– defines if the generator is gating on and off on positive
or negative transitions.
Level
– sets the trigger level crossing point for the rear panel
TRIG IN connector. Signal transition to above the trigger level
will gate the instrument. When the slope is set to negative,
transitions to below the trigger level will gate the instrument.
Trigger level sensitivity and maximum level should be observed
to avoid damaging the input
You may use the gated mode to gate standard, arbitrary,
sequenced and modulated waveforms. The gated run mode
parameters are shown in Figure 3-10.
Figure 3-10, Gated Mode Parameters