5-8 Chapter 5
Making GSM Cable and Antenna Measurements
Making Return Loss Measurements
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
turned on.
c. Set an amplitude level appropriate for the device under test. The
default value = –10 dBm. 0 dBm may be used for systems with
higher loss.
3. Adjust the spectrum analyzer control settings (for example
frequency, resolution bandwidth, sweep time and input attenuation)
as appropriate for the signal separation device and device being
tested.
4. Establish a 0 dB reference trace for normalizing the measured data.
a. Remove the device to be measured and replace it with a short or
open as shown in Figure 5-5.
b. Press the
View/Trace front panel key.
c. Press the
More menu key.
d. Press the
Normalize menu key, Store Ref (1 - 3) and normalize On.
Figure 5-5 Calibrating the Spectrum Analyzer for Return Loss
5. Make the measurement.
a. Re-connect the device to be measured to the signal separation
device.
b. Read the measurement and save it if required.
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