Decimator Quick Tour
SED Systems, a division of Calian Ltd.
(Proprietary)
9
7.
Carrier Monitoring
Now that you have configured the Decimator UI to view a carrier, you are 90% of the way to
performing Carrier Monitoring. Yes, really! In this tour, we will have 4 carriers to measure. The
first one is already configured. A measurement consists conceptually of a list of settings (or a state)
to lock into an area of spectrum to monitor. Each measurement results in a trace that is passed to
one or more analyses, producing a pass/fail result. The overall measurement status result for a
particular carrier is a summary of all the analyses included for that carrier.
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Before adding our first measurement, let’s get some help computing the Band Power
for the modulated carrier. We will use a Delta marker to help us do this. Click the
MARKERS button, then Marker 2, click the Style menu item and select Delta. Drag
the markers around with the mouse to separate them, one on each edge of the carrier.
The Band Power shown in Figure 11 in the Marker Legend is the total power in the
carrier. We can use -32.00 dBm for our Nominal Power in this case.
Figure 11 Modulated Carrier with Delta Markers
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Let’s capture the existing carrier as a measurement named “Mod-1400”
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Click the CARRIER MONITOR button
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Click New Measurement
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Name the measurement “Mod-1400”
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Check the Band Power Analysis and override the default values for Nominal
Power = -32 dBm and Tolerance Power 10 dB. This provides an operational
threshold limit from -22 dBm to -42 dBm. You should see something like shown
in Figure 12. Click OK.
