HP Cell Phone Accessories 8935 사용자 설명서
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Chapter 2
Testing AMPS Base Stations
Transmitter Maximum Voice Deviation
Transmitter Maximum Voice Deviation
This test measures the transmitter’s maximum FM Deviation by a voice
signal in the absence of any other modulation signal.
signal in the absence of any other modulation signal.
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 (
❒ You have specified any gains or losses in your test system (
Test Procedure
1. Turn off the base station’s RF transmitter. A transmitter can be
damaged if it is not transmitting into a specified load, such as an
antenna, power amplifier, duplexer, or power meter with a 50
antenna, power amplifier, duplexer, or power meter with a 50
Ω
input impedance.
2. Verify that the transmitter’s rated RF power (or the level out of the
power amplifier if applicable) does not exceed the level indicated
next to the Test Set’s RF IN/OUT connector.
next to the Test Set’s RF IN/OUT connector.
3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT
port.
4. Connect the transmitter’s audio modulation (voice) input to the Test
Set’s AUDIO OUT port.
5. Enable the transmitter’s audio (speech) modulation.
6. Turn off any modulation signals to the base station other than audio.
7. Press the
RF Anl
key to access the RF ANALYZER screen.
8. Enter the transmitter’s channel number in the
RF Channel
field.
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