Channel - Access Code Table Astro Nac Assignments - Futurecom PDR8000 Programming Manual

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In the Channel Configuration the 'NAC Code Table' allows the user to configure NAC
Assignment Table associated with that channel.
The Network Access Code or NAC is a feature of Project 25 digital radios that operates similarly
to PL/DPL codes for analog radios. NAC codes minimize co-channel interference and allow
repeater addressing by keeping the receiver squelched unless a signal with a matching NAC
arrives. NACs are programmed as a 3-digit hexadecimal code that is broadcast along with the
digital signal (Voice, Data, or Supplementary Data) being transmitted.
Since the NAC is 3-digit hexadecimal number (12 bits), it gives 4096 possible NACs for
programming.
Three of these NACs have special meaning:
$293 - the default NAC
$F7E - Receiver Monitor; a receiver set for this NAC will unsquelch on any NAC
received
$F7F - Community Repeater; a repeater receiver set for this NAC will allow all incoming
signals to be repeated with the NAC intact.
PDR8000 allows each of its digital-enabled channels to be configured with a desired behavior
for utilizing NACs. These behaviors are captured in NAC Code Table. Each configured
channel in the PDR8000 can point to one of the configured Access Code Tables. Each Access
Code Table can be used to define NAC operation for a specific channel or may capture
behavior shared by multiple channels.
The Channel-Access Code Table ASTRO NAC Assignments' Table excerpt is shown below
with the description of each field in the following table.
2022-08-25
C T ASTRO NAC A
ODE ABLE
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PDR8000 Portable Digital Repeater Programming Guide
SSIGNMENTS
Document 8K088X04 R5.01
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