Motorola Solutions Inc. 99FT4100 Manual De Usuario

1 Connect and set up test equipment as shown in 

Figure 17: Test Equipment Setup for Verifying

Transmitter Circuitry on page 61

.

2 Apply input power to the repeater.

3 Press the PTT switch of the microphone.

4 Measure output power by observing reading on an in-line wattmeter.

a If the transmitter output is not at proper power (as set for a particular site), adjust the output

power as described in the Radio Management online help.

5 If the transmitter output power is proper, set up the Service Monitor for spectrum analyzer

display.

a Press the PTT button and observe the display.

The display should show a single frequency carrier:

b If the display shows multiple carriers evenly spaced about the carrier, suspect a faulty Exciter

module or PA module.

c If the display shows a solid carrier but it is off frequency, suspect the following:

• Faulty transceiver board

• Faulty external 5/10 MHz reference source (if used)

d If the display shows a single carrier moving erratically, suspect a faulty transceiver board.

6 If display is proper, set up Aeroflex 3900 Series Communications System Analyzer to display

modulation.

a Using the microphone, push the PTT button and speak into the microphone.

b Verify that the display shows an audio signal.

c If the proper display is not obtained, suspect faulty transceiver board.

7 Set the Aeroflex 3900 Series Communications System Analyzer for GEN/ MON MTR.

a Press the PTT button and speak loudly into the microphone to cause maximum deviation.

Display should read:

• 4.60 kHz maximum for a 25 kHz system

• 3.68 kHz maximum for a 20 kHz system

• 2.30 kHz maximum for a 12.5 kHz system

b If the proper display is not obtained, suspect faulty transceiver board.

8 This completes the Verifying Transmitter Circuitry test procedure. If all displays and

measurements are correct, the transmitter circuitry may be considered to be operating properly.

MN003557A01-AA
Chapter 7:  SLR 1000 Performance Check or Testing

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