Keysight E8663D, Руководство пользователя

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54 Keysight E8357D/67D & E8663D PSG User’s Guide
Basic Operation
Configuring the RF Output
3. Press Optimize S/N to On.
Configuring a Swept RF Output
A PSG signal generator has up to three sweep types: step sweep, list sweep,
and ramp sweep. Ramp sweep is available with Option 007.
The signal generator indicates the sweep advance in a progress bar on the
front panel display. If the sweep time is greater than one second, the progress
bar sweep advances according to the frequency span of each segment. For
each segment in the span, the progress bar displays the full segment and then
the sweep is taken. With sweep times less than one second, the progress bar is
drawn, the sweep taken, and the progress bar is then blanked.
NOTE
List sweep data cannot be saved within an instrument state, but can be saved
to the memory catalog. For instructions on saving list sweep data, see
“Storing Files to the Memory Catalog” on page 71 .
During swept RF output, the
FREQUENCY
and
AMPLITUDE
areas of the signal
generator’s display are deactivated, depending on what is being swept.
Step sweep (see page 55 ) and ramp sweep (see page 56 ) provide a linear
progression through the start–to–stop frequency and/or amplitude values,
while list sweep enables you to create a list of arbitrary frequency, amplitude,
and dwell time values and sweep the RF output based on that list.
The list sweep example uses the points created in the step sweep example as
the basis for a new list sweep.
Ramp sweep (see
page 59 ) is faster than step or list sweep, and is designed to
work with an 8757D Scalar Network Analyzer.
The signal generator provides a softkey, Sweep Retrace Off On, that lets you
configure single sweep behavior. When sweep retrace is on, the signal
generator will retrace the sweep to the first point of the sweep. If the sweep
retrace is off, the sweep will stop and remain on the last point in the sweep.
Activating Scalar Pulse in Sweep Configurations
If your sweep setup uses a scalar network analyzer and an AC detector, the
PSG must modulate the swept signal with a 27 kHz square wave, also referred
to as a scalar pulse. This pulse modulation is necessary for the AC detector to
properly detect the swept signal. If the PSG is controlled by an 8757D through
a GPIB connection, the scalar pulse automatically turns on when AC detection
is selected on the 8757D. When using any other scalar analyzer, you can
manually turn on the scalar pulse using either one of the following key–press
sequences:
Press Sweep > Configure Ramp/Step Sweep > More > Scalar Pulse Off On
to On