112
Measuring Digital Communications Signals
Channel Power Measurements
Channel Power Measurements
This section explains how to make a channel power measurement on a W-CDMA
(3GPP) mobile station. (A signal generator is used to simulate a base station.) This
test measures the total RF power present in the channel. The results are displayed
graphically as well as in total power (dB) and power spectral density (dBm/Hz).
Step Action Notes
1 Set up the signal
generator.
a. Set the mode to W-CDMA.
b. Set the frequency to 1.920
GHz.
c. Set the amplitude to
−20 dBm.
2 Connect the source RF
OUTPUT to the
analyzer RF INPUT as
shown.
3 Select the mode. • Press Mode, Spectrum
Analyzer.
4 Preset the analyzer. • Press Mode Preset.
5 Set the radio standard
and toggle the device to
mobile station.
• Press Mode Setup, Radio
Std, 3GPP W-CDMA,
3GPP W-CDMA, Device
(MS).
6 Set the center frequency. • Press FREQ Channel, 1.920,
GHz.
7 Initiate the channel
power measurement.
• Press Meas, Channel Power. The Channel Power measurement result
should look like “Channel Power
Measurement Result.” on
page 113.
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