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42 Chapter 2
Testing AMPS Base Stations
Receiver Sensitivity (SINAD)
Receiver Sensitivity (SINAD)
This test measures the receiver’s ability to demodulate voice signals
from very low RF carrier levels.
Prerequisites
The following conditions must be met before testing:
❒ The Test Set is turned on and Preset was pressed to establish a
known instrument state.
❒ You have configured the Test Set for channel tuning (see “Using
Channel Numbers to Set Analyzer and Generator
Frequencies” on page 68).
❒ You have specified any gains or losses in your test system (see
“Compensating for Signal Losses and Gains in the Test
Setup” on page 33).
Test Procedure
1. Turn off the base station’s transmitter.
2. Turn the base station’s radio squelch, data, and SAT off.
3. Connect the base station receiver’s inputs to the Test Set’s DUPLEX
OUT port.
4. Connect the receiver’s audio output to the Test Set’s AUDIO IN
port(s). Unless the receiver’s audio out amplifier is not referenced to
chassis ground, you should only connect to the AUDIO IN - HI port.
For floating output amplifiers, see the HP 8935 Reference Manual
for information on using the AUDIO IN - LO connection.
5. Press
CDMA Gen to access the CDMA GENERATOR screen.
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