User's Manual

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KNG Mobile Manual
When operating in Digital Mode, each channel can be programmed to use either
Normal squelch or Selective squelch.
Normal squelch is used to mimic analog operation. Signals are only qualied with
the programmed NAC. TGIDs and P25 Unit IDs are ignored. Each digital channel is
programmed with a receive NAC and a transmit NAC. When an incoming signal’s
NAC matches the channel’s programmed receive NAC, the radio unmutes. The
default NAC is 0659 ($293 hex).
The digital equivalent of carrier squelch is achieved by programming the receive
NAC = $F7E (3966 decimal). The radio will unmute when a digital signal with any
NAC is detected. The $F7E (3966 decimal) NAC is reserved for receivers and is not
allowed as a transmit NAC.
Selective squelch is used for processing Group Calls and Unit-to-Unit Calls. TGIDs
are assigned on a per-channel basis. Users can be separated into Talk Groups
with each group having its own TGID. Then, on channels programmed for Selective
squelch, the incoming signal’s NAC and TGID must match the channels programmed
receive NAC and TGID for the radio to unmute. The default TGID is 1.
The TGID value 65535 ($FFFF hex) is used to effect an “All Call”. If the radio
receives a signal with a matching NAC and the TGID = 65535 ($FFFF hex), it will
unmute. Also, if the radio’s programmed TGID is 65535 ($FFFF hex), it will open on
any signal with a matching NAC, ignoring the incoming TGID.
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