Chapter 5 5-13
Making GSM Cable and Antenna Measurements
Making Loss/Gain Measurements
Making Loss/Gain Measurements
Purpose
Loss/gain measurements are used to verify the performance of devices
or components as illustrated by the following examples:
• A loss measurement can be used to test the performance of a base
station’s cables. Lower than expected base station power
measurements could be caused by faulty cables. A cable’s role in the
problem can be determined by measuring the loss of the cable and
comparing the result to the expected value.
• A gain measurement can be used to test the performance of an
amplifier. A lower than expected gain measurement could indicate a
fault with the amplifier.
Making the measurement
NOTE The spectrum analyzer must be in spectrum analyzer mode for this
measurement.
1. Connect the tracking generator to the device input and the device
output to the input of the spectrum analyzer as shown in Figure 5-7.
Figure 5-7 Loss/Gain Measurement Set-up
2. Turn on the tracking generator.
a. Press the
Source front panel key.
b. Press the
Amplitude menu key so that the tracking generator is
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