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HP 8360 User Handbook Manual Page 364

8360 series synthesized sweepers.
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Step Control Slave
Function Group
Menu Map 2
Description
FREQUENCY
This softkey lets you designate the synthesizer as the slave in
a dual synthesizer measurement system. A dual synthesizer
system (two-tone measurement system) facilitates accurate device
characterizations by providing one timebase reference for both
sources.
Figure S-l shows the connections required for
the message line, the status message
synthesizer has an external timebase reference. The start and stop
frequencies of the slave can be offset above or below those set on the
master for fixed offset two-tone measurements.
To
synchronize properly for swept offset measurements, the 0 to 10
volt sweep ramp must be actively sweeping on the slave. If a CW
frequency is selected as the fixed LO frequency, the sweep ramp is
deactivated and the proper synchronization does not occur. Select a
center frequency with zero span to keep the slave's voltage sweep
ramp active and ensure proper synchronization.
For synthesized step sweep measurements, set the number of sweep
points on the slave the same as on the master synthesizer. If the
master synthesizer is connected to a network analyzer, the analyzer
automatically sets the master synthesizer's step size to match
the number of points displayed on the analyzer. Since the slave
synthesizer is not connected to the analyzer, set the slave to match
the master synthesizer. Allow the master to trigger the slave's steps,
Step Swp Pt Tsig Ext
set
For ramp sweep measurements, on the slave set the sweep time
equivalent to the master synthesizer. If the
network analyzer, the slave's sweep time is slightly longer than the
master's because the analyzer does not stop the sweep precisely on
the last point. Use the following formula to determine the slave's
sweep time for a system controlled by an analyzer.
For fixed-offset ramp sweep measurements the same sweep time must
be set on both the master and the slave. Since the master's sweep
time is typically determined by the measurement configuration, set
the slave to match the master.
For more accurate ramp sweeps, select
both the master and slave synthesizers. When this feature is active it
calibrates the frequency at the end of every frequency band.
a
two-tone system. On
EXT REF
appears indicating the
on the slave synthesizer.
master is connected to a
User's Handbook
HP 8360

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