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Conducting spectrogram
The Spectrogram is particularly useful when attempting to identify periodic or intermit-
tent signals as it captures spectrum activity over time and uses various color to differ-
entiate spectrum power levels. When the directional antenna is used to receive the
signal, you will see a change in the amplitude of the tracked signal as you change the
location of the antenna and see a change in the Spectrogram colors. The source of the
signal is located in the direction that results in the highest signal strength.
To conduct spectrogram
1
Tap the Setup (
2
Tap Time Interval and enter a value by using the on-screen keyboard to set the
amount of time between each trace measurement.
3
Set the time cursor on a specific trace position:
a
b
c
4
Tap Reset/Restart to start a new measurement.
5
Tap to switch Type to 3D to Normal.
6
Tap Setup > Port Configuration > History Reset to clear current (C) and history
(H) status of CPRI alarms on LOS and LOF and start a new monitoring.
7
Optional: Tap the Save icon on the side bar and select a desired save option for
your measurement mode.
Using the spectrum replayer
The Spectrum Replayer allows you to retrieve and replay recorded spectrum analyzer
traces in interference analysis mode. These traces can be played back in the spectro-
gram or RSSI. You can configure the limit line to crate failure points when signals
exceed it. The failure points are clearly displayed on the trace timeline for quick access
during playback.
Figure 171
April 2021
) icon on the side bar of Spectrogram Measure mode.
Tap Time Cursor to On
Tap Position to enter a value. You can also use the move bar (up and down
arrows) in the lower left screen to move the time cursor.
To turn the time cursor off, tap Time Cursor to Off.
NOTE
Enabling the Time Cursor puts the measurement on hold, allowing you to
make post-processing analysis for each measurement over time using the time
cursor.
shows an example of the RFoCPRI spectrum replay.
SPA06MA-O User's Guide
22145360, R005
Chapter 10 Using RFoCPRI Analyzer
Conducting spectrogram
Page 371
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