Illegal Carrier Determination Feature (Trunked); Rf Channel Interference Determination Feature (Conventional) - Motorola GTR 8000 Manual

7.4 Illegal Carrier Determination Feature (Trunked)

The Illegal Carrier Determination feature allows radio channels to continue operating with system configurable
levels of channel interference. In an ASTRO
(RSSI), an RF Threshold Value, and the Malfunction Timer Value to implement this feature.
Table 7-1 Illegal Carrier Determination
If the channel receives a...
Valid Network Access Code (NAC)
Invalid Network Access Code (NAC)
OR Carrier activity without NAC
7.5 RF Channel Interference Determination Feature
(Conventional)
The RF Channel Interference Determination Feature allows radio channels to detect RF interference and log it to the
station log. RF Channel Interference is declared when the Carrier Squelch level is exceeded and none of the receive
qualifiers are met. Receive qualifiers are the programmed PL, DPL, or Rx NAC for the currently active channel.
6871022P86-A - November 2012
® 25 system, the base radio uses Received Signal Strength Indicator
and is assigned:
The base radio does not change since
the carrier is considered valid.
If the RF Threshold Value level is exceeded, the Malfunction Timer Value is
activated. After the timer expires, the base radio enters the Illegal Carrier state
and the base radio generates an Illegal Carrier message to UEM.
If the illegal carrier disappears or drops below the RF Threshold Value for 12.5%,
but not less than 10 seconds of the time period defined by the Malfunction Timer
Value, an event is sent to UEM.
7.4 Illegal Carrier Determination Feature (Trunked)
and is not assigned:
If the RF Threshold Value is exceeded,
the base radio enters the Illegal Carrier
state and the base radio generates an
Illegal Carrier message to UEM.
7-3