Common problems and solutions 700/800 SBIII:


Common problems and solutions 700/800 SBIII:

  • Unwanted signals 40dB greater than desired ones, excessive AGC –
    • use narrowing filter kit.
  • High signals less than 40 dB affecting desired ones (desired signal not being heard)
    • Setup digital filtering to attenuate undesired signal.
    • Use narrowing filter kit when applicable.
  • Popping Radios - Squelch may be set too low.
    •  Increase the squelch setting.  BDA could be picking up excessive noise.
  • BDA not picking up signal.
    • Squelch may be set too low.  Increases squelch setting.
    • Signal is too low to receive, below the noise floor.
  • Channel does not un-squelch (could be a noisy channel)
    • Reduce the squelch setting.
  • Noisy signals –  
    • Filters may not be wide enough to pass the entire channel.
    • Overlapping filters
    • Squelch set to low.
    • Increase output power if it is set to low.
  • ADC Overflow Alarm, excessive input signal (-30 to -20dBm)
    • Reduce AGC reference level.
  • “Breathing” signals, Static sounds (AGC trying to keep up with Modulation scheme, e.g., digital p25)
    • Adjust AGC hold and decay time.
    • Use factory preset AGC settings for APCO P25
    • Adjust OLC hold and Decay time for a particular channel.
    • Use Factory preset OLC Settings for APCO P25
  • Oscillation(s)
    • Reduce BDA gain.
    • Increase antenna to antenna isolation.
  • Problem with a particular channel
    • Factory reset.
    • Ensure all channels are initialized with data regardless of if it is used or not. 
  • Excessive Filter Delay
    • Reduce the adjacent channel offset and adjacent channel rejection of filter.
    • Widen the filter.
    • Use factory preset low delay filters.
  • Alarm on Link page / Excessively high PA current
    • Could be a failing PA.  Contact Tech Support.
  • Control Panel menu item not visible
    • Enter username and password under Administration menu.
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