Installation Manual

2 Set the service monitor to generate a 1.0
μV (-107 dBm) FM signal at the receiver frequency,
modulated by a 1 kHz tone at 3 kHz deviation for 25 /30 kHz channel spacing, or 1.5 kHz
deviation for 12.5 kHz channel spacing. The 1 kHz tone should be audible through the external
speaker. If no audio is heard, suspect the following:
• Faulty transceiver board
• Faulty service monitor-to-station RF cable
• Left panel to transceiver board cable unplugged
• Faulty left panel to transceiver board cable
3 If audio is heard (the audio volume can be adjusted on the rear of the HSN1006), look at the
oscilloscope window on the Aeroflex 3920 (or a separate O-Scope).
a Verify that the audio level sine wave measures between 0.75 to 1.5 Vpp.
b If not, connect to the tuner and increase the Rx audio level until the correct level is achieved.
If the level cannot be obtained, suspect a faulty transceiver board.
4 Move the BNC cable from the scope CH 1 input to the Audio 1 input.
5 Change the System Monitor injection signal level to the noted levels in Table 8: SLR 1000
Repeater Specifications on page 38.
6 Measure the receiver 12 dB SINAD sensitivity.
a If the SINAD level is less than 12 dB, suspect a faulty transceiver board.
7 Verify that all displays and measurements are correct.
The receiver circuitry may be considered to be operating properly. This completes the Verifying
Receiver Circuitry test procedure.
8 Remove the test equipment, restore the repeater to normal service, and (if applicable) return to
the troubleshooting flow chart to resume the troubleshooting sequence.
MN003557A01-AF
Chapter
7: SLR 1000 Performance Check or Testing
68