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96
Table 5-2 Description of Built-in Antenna Factor of S5105D/E/F microwave analyzer
No.
Name
Frequency range
Description
1
S89101A antenna A
10kHz - 20MHz
Antenna Factor 0
2
S89101B antenna B
20MHz - 200MHz
Antenna Factor 1
3
S89101C antenna C
200MHz - 500MHz
Antenna Factor 2
4
S89101D antenna D
500MHz - 4GHz
Antenna Factor 3
VI. Measurement of Channel Power
This Section illustrates how to use the channel power measurement function of the S5105D/E/F
microwave analyzer to measure the channel power of the signal by taking the application of
measurement of channel power of the CDMA signal and GSM signal as an example.
1
Definition of Channel Power
Channel power measurement is one of the common measurements in RF transmission systems.
Therefore, channel power is defined as the power transmitted by a signal over a range of frequencies at
a specified time interval. In the test of the power amplifier and the filter circuit, the system is faulty if the
specific power is not measured. The communication transmitter is evaluated by measurement of channel
power, and its quality of the RF transmission is determined by comparing it to specific communication
protocol.
2
Measurement of CDMA Channel Power
The S5105D/E/F microwave analyzer can be used to measure the CDMA signal power in the channel.
Since the CDMA signal and continuous wave signal differ in many respects, an accurate setting can
make the measured CDMA signal more accurate.
Measurement Setup
The recommended microwave analyzer settings for accurately measuring CDMA signal channel power
using the S5105D/E/F microwave analyzer channel power measurement function are:
a) resolution bandwidth
：
10kHz.
b)
c)
Video bandwidth:
Average function:
10kHz.
On.
Measurement steps
Steps for measuring the power of a CDMA signal channel using a S5105D/E/F microwave analyzer are as
follow:
a) Reset the microwave analyzer to its default state:
Press
【
Reset
】
, [Default State] .
b) A signal generator is used to generate a CDMA signal, which can also be received through the
antenna. Connect the output of the signal generator to the microwave analyzer spectrum input via a
cable.
c) Set the resolution bandwidth and video bandwidth:
Press
【
BW
】
, [RBW Auto Man] , set the resolution bandwidth to 10kHz;
Press [VBW Auto Man] to set the video bandwidth to 30kHz or more.
d) Turn on the channel power measurement function:
Press
【
Measure
】
, [Ch Power >] , [Ch Power Off On] . Enter the channel power measurement interface.
e) Set center frequency:
Press [Center Freq] and set the center frequency with the figure keys. For CDMA signals, set to 1.9326
