Kenwood TK-480 Service Manual page 7

TK-480
■ 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.
3-2. MSK
Built-in MSK (DMS : Fleet-ID) decoder is available for op-
tion signalling. When the group ID matches, squelch re-
mains 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
4. Alphanumeric Two-way Paging Function
(Digital Message System)
4-1. General
The Alphanumeric Two-way Paging Function (DMS) is a
Kenwood proprietary protocol. It enables a variety of paging
functions.
4-2. ID Construction
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.
4-3. PTT ID
A pre-programmed unique ID can be sent at the begin-
ning of transmission and/or the end of transmission to iden-
tify which radio unit is on air.
4-4. Selective Call (SELCALL)
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.
6
OPERATING FEATURES
4-5. Status Message
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.
■ Status 80~99 (Special)
purposes. Entering these statuses from the DTMF keypad
can be inhibited.
for special purposes;
Note : Remote stun works with DTMF D.B.D. function also.
■ Automatic Status Response
the Status Mode, it can automatically respond with the se-
lected status number upon request from the base station.
(The request function is initiated by serial control on the
base station (Optional).)
4-6. Short Messase (Optional)
ment is required). Received Short Messages will be dis-
played in the same manner as a Status Message. A maxi-
mum of 4 received messages can be stored in the stack
memory. In the Stack Mode, 3-digit LCD indicates the re-
ceived Short Message as "M01"~"M04".
4-7. Long Message
equipment is required). Received Long Message will not be
displayed or stacked in the radio memory but is output
through the COM (Data) port.
4-8. Emergency Function
each emergency transmission.
Using a 2-digit number, you can send and receive a Sta-
Status numbers from 80 to 99 are reserved for special
Please notice that the following status numbers are used
80~89 : Reserved for future use.
90 : Remote stun on. Disable the received radio unit's
TX.
91 : Remote stun on. Disable the received radio unit's
TX/RX.
92 : Cancel remote stun. Enable the received radio unit's
TX/RX.
93 : Acknowledgement status sent when the radio unit is
in stun mode (TX disabled).
94 : Acknowledgement status sent when the radio unit is
in stun mode (TX/RX disabled).
95~98 : Reserved for future use.
99 : Emergency Status.
If you pre-select a status number and leave the radio in
A maximum of 48 characters can be sent (External equip-
A maximum of 1024 characters can be sent (External
Emergency status 99 will be sent at the beginning of