Publication No. 980935 Rev. A
3152B User Manual
marker output.
Ampl/Freq Hop
The Ampl/Freq Hop panel (Figure 4-18), contains parameters for
controlling the hop modulation function. To turn one of the
functions on and off, click on the appropriate button in the State
group. The output has two hop options: Fixed and Variable. In
Fixed mode, the output steps through the pre-assigned hop values
at a constant rate, as programmed using the dwell time parameter.
In Variable mode, the output dwells on each step for a period of
time that is programmed in the Dwell Time field in the hop data
table that is programmed when using the Variable Hold option.
The various groups in this panel are described below.
State
The State buttons enable or disable the hop functions.
General
The General group contains parameters that are common to all of
the hop functions. These are CW frequency and baseline.
CW Frequency –
The CW Frequency is the frequency of the pre-
modulation carrier waveform.
Baseline –
The Baseline parameter affects the output
characteristics in one of the interrupted run modes (i.e., triggered,
burst). In this case this parameter defines where the signal idles
between triggers. There are two options: CW and DC. The DC
option will set the idle state to a DC level, meaning that in between
triggers, the output resides on a DC level and generates modulation
when a trigger is accepted. The CW is similar except the signal
idles on the pre-trigger CW frequency setting, executes the
modulation upon receipt of a legal trigger signal and returns to
continuous CW frequency output.
Amplitude Hop
The Amplitude Hop group contains parameters that control the
amplitude hop function. These are: hop data, dwell control, dwell
time and marker position.
Hop Data –
The Hop Data button in the Ampl Hop group provides
access to the data string that controls the sequence of amplitude
hops. The hop data table contains a list of amplitude levels that the
output steps through the amplitude levels of as programmed in the
hop data table.
Fixed Hold –
The hold parameter determines how long each step
of amplitude dwells on this setting before it will step to the next
amplitude setting. By selecting Fixed Hold, the hold time remains
constant throughout the entire hop table.
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