NXU-2B Operations Manual
6-5
Interoperability Now!
6.3.5
Symptom: False Keying of Donor Radio by Radio Channel
Cause: Extraneous RFI emissions present at frequency/level that keys a donor radio
Solution: Eliminate RFI emission source
Alternative Solution: Transit power of other, nearby donor radios may be excessive, so if
possible. reduce to just enough to link to repeater
Alternative Solution: Modify antenna placement
Alternative Solution: Change COR SENSE to VMR
6.3.6
Symptom: Radio Channel Experiencing Continuous Active COR State
Cause: Donor radio is introducing continuous noise
Cause: Donor radio is non-FM type, without the quieting characteristic of a frequency modulated
signal. These are most likely Amplitude Modulated radios, such as commonly used by aircraft,
or HF/single side band radios. They typically lack a Hardware COR output and high noise level
causes VOX to false on the noise.
Solution: Change COR SENSE to VMR
6.3.7
Symptom: Audio Sounds Too Weak
Cause: Received audio level from donor radio (or other device type) is too low
Solution: Lower RX INPUT LEVEL until NXU-2B Audio Input LED flashes with voice peaks
Cause: Transmit audio level delivered to donor radio is too low (verify/rectify cause above first!)
Solution: Increase TX OUTPUT LEVEL until donor radio is properly modulated.
6.3.8
Symptom: Audio Sounds Too Loud or Distorted
Cause: Receive audio level from donor radio (or other device) is too high
Solution: Increase RX INPUT LEVEL until NXU-2B Audio Input LED flashes with voice peaks
Cause: Transmit audio level delivered to donor radio too high (verify/rectify cause above first!)
Solution: Lower TX OUTPUT LEVEL until donor radio is properly modulated.
Summary of Contents for NXU-2B
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Page 18: ...NXU 2B Operations Manual 1 10 End of Section One...
Page 28: ...NXU 2B Operations Manual 2 10 End of Section Two...
Page 60: ...NXU 2B Operations Manual 6 8 End of Section Six...
Page 62: ...NXU 2B Operations Manual 7 2 End of Section Seven...
Page 68: ...NXU 2B Operations Manual 8 6 End of Section Eight...