Kenwood TK-480 User Manual

TK-480/481

Built-in DTMF decoder is available for option signalling.
It is possible to use individual call, group call, D.B.D.

(Dead Beat Disable).  D.B.D. is used with DTMF only.

If the option signalling matches, a predetermined action

will occur.

If option signalling matches on a group which is set up

with option signalling, the option signalling indicator ( ) will
flash and option signalling will be released.  The transpond
or alert tone will sound.

If the selective call alert LED is set up, the orange LED

will flash.

While option signalling matches (or if option signalling is

deactivated when you are transmitting), you can mute or
unmute ID/QT/DQT/Carrier.

■ AND/OR

You can select AND or OR for option signalling match

conditions.

Alert/Transpond

AND

QT/DQT/ID+DTMF; Option matches = Action

OR

QT/DQT/ID+DTMF; Option matches = Action

AF mute open

AND

QT/DQT/ID+DTMF; Option matches = Action

OR

QT/DQT/ID; Signalling only matches = Action

With OR set up, alert/transpond will not function with

only DTMF.

With OR set up, AF mute will not release when only

DTMF matches.

With a conventional group not set up with QT or DQT,

only the carrier is considered when signalling matches.

■ Auto Reset

If option signalling matches a group set up with option

signalling, option signalling is released.  After matching op-
tion signalling, option signalling will temporarily reset auto-
matically.

■ Dead Beat Disable

If the D.B.D. code matches, a predetermined action will

occur.  Whether option signalling is activated or not, when
D.B.D. matches on any group, the transceiver will become
TX inhibited or TX/RX inhibited.  While D.B.D. is active, if the
D.B.D. code + “#” code is received, D.B.D. will disactivate.

When D.B.D. matches, transpond will function.  Alert will

not be output, and option signalling match icon will not ap-
pear.

Built-in MSK (FleetSync™ : Fleet-ID) decoder is available

for option signalling.  When the group ID matches, squelch
remains muted while the station waits for reception of
proper MSK signal.  When MSK signal matches, squelch
unmutes.

■ AND/OR

AND : QT/DQT/ID + MSK to unmute.  MSK matches =

alert tone

OR : QT/DQT/ID to unmute.  MSK matches = alert tone

T h e   A l p h a n u m e r i c   T w o - w a y   P a g i n g   F u n c t i o n

(FleetSync™) is a Kenwood proprietary protocol.  It enables
a variety of paging functions.

A radio unit ID is defined by a combination of 3-digit Fleet

and 4-digit ID numbers.  Each radio unit must be assigned its
own Fleet and ID numbers.

A pre-programmed unique ID (Own) can be sent at the

beginning of transmission and/or the end of transmission to
identify which radio unit is on air.

When selecting (Sel) for MSK ID, the radio calls the spe-

cific Fleet user the same as selective call.

This is a voice call to a particular individual or group of

stations.

■ Example of call types;

[100][ALL ] : <Group Call>
All the units whose fleet number is “100” are called.
[100][1000] : <Individual Call>
The unit, whose the fleet number is “100” and ID num-
ber is “1000”, is called.
[ALL][ALL ] : <Broadcast Call>
All the units are called.
[ALL][1000] : <Supervisor Call>
All ID “1000” are called regardless of their fleet number.

■ Unit ID Encode Block

Encode ID Block can be set to limit manual dial ID.  The

radio unit will not accept an ID other than these IDs which
are entered from the keypad.  If Inter-fleet Call is enabled,
block ID setting affects  each fleet group.

Using a 2-digit number, you can send and receive a Sta-

tus message which may be decided in your talk group.  Each
Status may be displayed with 16 alphanumeric characters if
programmed in the radio.  A maximum of 9 received mes-
sages can be stored in the stack memory, and it can be re-
viewed after reception.  If the message memory becomes
full, the oldest one will be erased.  The stack memory will be
cleared by turning radio power off.