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APCO Project 25
Reception
APCO Project 25 is a modulation process where voice
communications are converted into digital communications.
This conversion is similar to the technology used with digital
mobile phones. There are several types of Project 25 systems
available! Systems the Uniden BC250D supports are listed
below.
- Conventional – one frequency with digital voice.
- Trunked with analog control channel and digital voice –
Many frequencies shared by many departments and the
control channel is analog with digital voice. Control channel
operates at 3600 Baud.
- Mixed mode – trunked (3600) system with an analog control
channel alternating / mixing analog and digital voice
communications.
Note: Do not install the APCO card with the AC Adapter
connected.
Installing the APCO P-25 Card
1. Turn OFF the
scanner, and open
the cover.
2. Carefully unplug the
battery pack.
3. Insert the APCO card
with the label (the
side “APCO P-25
DIGITAL CARD” is
printed) facing up as
shown.
4. Carefully connect the
battery pack,
matching the red and
black wires with the
corresponding
Red/Black plug.
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