RELM WIRELESS CORP. - BK RADIO DPHX51 User Manual
10 BK Radio
CHANNEL GUARD OPERATION
ANALOG SQUELCH CONTROL
Sub-audible signaling (CTCSS/CDCSS) is used
to allow a group of radios to be selectively called
in a system. Programming the receive guard
equal to zero allows for Carrier Squelch
operation, where the radio will unmute whenever
a carrier is detected.
to allow a group of radios to be selectively called
in a system. Programming the receive guard
equal to zero allows for Carrier Squelch
operation, where the radio will unmute whenever
a carrier is detected.
APCO PROJECT 25 SQUELCH CONTROL
Network Access Codes (NACs) provide the
digital equivalent of analog sub-audible signaling
(CTCSS/CDCSS) allowing a group of radios to
be selectively called within a system.
digital equivalent of analog sub-audible signaling
(CTCSS/CDCSS) allowing a group of radios to
be selectively called within a system.
Users in the same area (using the same NAC)
can be further divided into Talk Groups, with
each group having its own Talk Group ID (TGID).
Group Calls are made by designating both the
users’ NAC and TGID.
can be further divided into Talk Groups, with
each group having its own Talk Group ID (TGID).
Group Calls are made by designating both the
users’ NAC and TGID.
Each radio also has an individual P25 unit ID. A
Unit-to-Unit call contains the addressee’s NAC,
and uses the addressee’s P25 unit ID instead of
the TGID.
Unit-to-Unit call contains the addressee’s NAC,
and uses the addressee’s P25 unit ID instead of
the TGID.
When operating in Digital Mode, each channel
can be programmed to use either Normal
squelch or Selective squelch.
can be programmed to use either Normal
squelch or Selective squelch.
1. Normal squelch is used to mimic analog
operation. Signals are only qualified 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 659 ($293 hex). The digital
equivalent of carrier squelch is achieved by
programming the receive NAC = 3966($F7E
hex) the radio will unmute when a digital
signal with any NAC is detected. The 3966
($F7E hex) NAC is reserved for receivers
and is not allowed as a transmit NAC.
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 659 ($293 hex). The digital
equivalent of carrier squelch is achieved by
programming the receive NAC = 3966($F7E
hex) the radio will unmute when a digital
signal with any NAC is detected. The 3966
($F7E hex) NAC is reserved for receivers
and is not allowed as a transmit NAC.
DPH Owner’s Manual 35
P
R
G
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RX SCN ID CG
ALPHANUMERIC DISPLAY
TX
PRG
ALPHANUMERIC DISPLAY
DPH radios have a slide-out keypad/display
cover. To remove or install the cover, turn off
the radio and remove the battery (see Battery
Installation and Removal, page 40).
cover. To remove or install the cover, turn off
the radio and remove the battery (see Battery
Installation and Removal, page 40).
The Alphanumeric Display can be
programmed to operate in Numeric Mode,
displaying channel numbers instead of labels.
programmed to operate in Numeric Mode,
displaying channel numbers instead of labels.
Display annunciators indicate the following
information:
information:
Alphanumeric
Indication
PR -Priority
Channel
PRG
-Programming Mode (includes PR)
TX -Transmit
RX -Receive
SCN
RX -Receive
SCN
-Scan List Channel
-Flashing SCN indicates scanning
in progress and RX SCN indicates
receiving on a scanned channel.
-Flashing SCN indicates scanning
in progress and RX SCN indicates
receiving on a scanned channel.
ID
-Digital reception/transmission –
‘It’s Digital’
-Programming Mode – Automatic
Numeric Identification (ANI)
‘It’s Digital’
-Programming Mode – Automatic
Numeric Identification (ANI)
CG
-User Channel Guard Active
GRP -Group
Label
-Individual Call
-Flashing phone icon indicates
missed call.
-Flashing phone icon indicates
missed call.
DPH Series portable radios with alphanumeric
displays can be programmed with the
following features:
displays can be programmed with the
following features:
DISPLAY BACKLIGHTING
The DPH radios can be programmed by your
dealer to backlight the display when a signal is
received or when a key is pressed. The time
duration of the backlighting can also be
programmed.
dealer to backlight the display when a signal is
received or when a key is pressed. The time
duration of the backlighting can also be
programmed.