W9068A Datasheet, PDF (5/16 Pages) Keysight Technologies – Phase Noise X-Series

05 | Keysight | Phase Noise X-Series Measurement Application N9068A & W9068A - Technical Overview
Log plot phase noise (continued)
View the entire phase noise behav-
ior across a wide range of offset
fre-quencies (1 Hz¹ to the difference
between the maximum frequency of
the analyzer and carrier frequency)
and measure phase noise with a
user-specified number of averages.
Perform trace smoothing with user-
adjustable smoothing segment length
(Figure 1).
The log plot measurement function
also includes:
–– AM rejection, which works for
offsets equal to or less than
1 MHz so that you observe only
the phase component
–– Overdrive function, which
maximizes the dynamic range at
offsets beyond 1 MHz, improv-
ing measurement accuracy by
reducing the adverse effect of
broadband noise
–– Support of maximum frequency
up to 50 GHz and beyond (with
PXA and external mixing)
–– A suite of advanced marker func-
tions optimized for detailed log
plot trace analysis
–– Display of tabular readings (the
decade table) in addition to the
graphic presentation
–– Automatic search of carrier func-
tion with Auto Tune Multi-level
video filtering
Figure 3. Carrier frequency drift view with phase noise vs. time
Spot frequency phase noise
After a particular frequency offset
has been identified for further analy-
sis, the spot frequency measurement
provides the time domain behavior of
phase noise at that particular offset
(Figure 2).
The spot frequency measurement
can be used to:
–– Monitor phase noise fluctuation
versus time at a user-specified
single offset frequency
–– Take advantage of improved
carrier frequency tracking range
with faster signal tracking
–– View graphic and numeric list
formats
–– Find the signal from the full
range of frequency with the X-
Series’ Auto Tune feature
The spot frequency signal tracking
feature provides:
–– A simultaneous view of phase
noise and delta frequency in time
domain
–– SSB, average SSB, carrier
power, carrier frequency, carrier
frequency (initial), and carrier
frequency delta in a table
1.  Requires Option AFP or ATP for previ-
ously purchased N/W9068A measure-
ment application product.