Keysight Technologies N9321C, User Manual

Page: 78 / 220

Functions and Measurements
Spectrum Monitor
70
Spectrum Monitor
The scrolling three-dimensional display is noted for its ability to
track the frequency and power behavior over the time, particularly
intermittent signals. The spectrum monitor is used to analyze the
stability of a signal over the time, or to identify intermittent
interference signals in communications systems.
The X-axis represents frequency, and amplitude is represented by
color; red for a strong signal and blue for noise floor. The Y-axis
represents time, with the trace from the newest sweep displayed at
the bottom of the screen. Earlier traces move up toward the top
with each new sweep. Two coupled markers allow the user to place
a marker on any trace in the Spectrum Monitor and view the
normal spectrum for the time of that sweep. The time interval
between sweeps can be adjusted, and up to 1500 traces can be
displayed and saved.
Figure 3-24 Spectrum Monitor Submenu
Please refer to the procedures below to perform a spectrum
monitor measurement.
1 Connect the omni antenna to RF IN connector.
2 Set the center frequency and span.
Press
Frequency > 1.8052 > GHz