Kenwood FM Transceiver TK-481 Service Manual page 5

TK-480/481
Auto TEL
Automatically connects available repeaters that are con-
nected to telephone circuits when operating as LTR system.
The time allocated to search for available repeaters is 60
seconds, after which connection failure occurs, a DTMF
tone is output and the function terminates.
If connection to an available circuit is made, only ID 253,
EOT or hang-up time-out can terminate the function.
AUX
This function can be programmed when the voice scram-
bler board is not installed.
If this key is pressed, an underscore ("_") appears at the
extreme right of the LCD and AUX port which is inside of the
transceiver turns to the active level. If pressed again, the
underscore disappears and the AUX ports turns to the
deactive level.
DTMF ID (BOT)
Pressing this key in Conventional mode, automatically
sends the preset Connect ID.
DTMF ID (EOT)
Pressing this key in Conventional mode, automatically
sends the preset Disconnect ID.
Display character
This key switches the LCD display between the system/
group number and system/group name.
Emergency
Pressing this key for longer than the programmed "Emer-
gency Key Delay Time" causes the transceiver to enter the
emergency mode. The transceiver jumps to the pro-
grammed "Emergency System/Group" and transmits for
the programmed "Active Time".
The transceiver disables mic mute while transmitting.
After finishing transmission, the transceiver receivers for
the programmed "Interval Time". The transceiver mutes
the speaker while receiving. Following the above sequence,
the transceiver continues to transmit and receive.
If "Man Down Switch" has been programmed on the ra-
dio and the switch is activated, the radio enters Emergency
mode after the specified "Man Down Delay Time" expires.
Function
Pressing this key causes the transceiver to display
"FCN". Then, pressing a DTMF key causes the correspond-
ing programmed function to start. This key may be conve-
nient when using many functions with the 12-key keypad
(K2 type).
Group up/down
When the key is pressed each time, the group number to
be selected is incremented/decremented and repeats if held
for one second or longer.
Home group
Each pressing of the key selects a preset system/group.
4
OPERATING FEATURES
of only the [Function], [Key Lock], [PTT], [Lamp], [Monitor A],
[Monitor B], [Monitor C], [Monitor D], and [Emergency] keys.
When the key is pressed, the LED lamp goes on.
seconds. If any key is pressed while the LED lamp is on, the
lamp is kept on for five seconds.
32 memories each with a memory dial of up to 16 digits and
an A/N of up to 10 digits per memory.
conventional. It is also used to reset option signalling.
the previously transmitted DTMF code. Pressing [PTT] at
this time, transmits the code that is currently displayed.
power. Turning the function on enables:
they are reset.
scanning.
during system scan. Each pressing of the key (to ON)
toggles between lockout and lock. The scan routine is
started when on lock. The DEL indicator flashes when the
system is on lockout.
If you press this key when scan is stopped (when a call is
being received from another station), the system is tempo-
rarily deleted and scanning restarts.
Type System Scan".
underscore ("_") appears at the extreme right of the LCD
display when scrambler is active. Pressing this key changes
ON/OFF of scramble operation.
Select Mode.
Key lock
Pressing this key causes the transceiver to accept entry
The locked keys also include the tuning control.
Lamp
This key illuminates the LCD and keys on the front panel.
When it is released, the lamp goes off after about five
Memory
This key allows DTMF memory data to be recalled; up to
Monitor
Used to release signalling or squelch when operating as a
Redial
Pressing this key when System/Group is shown, displays
RF power low
Used to temporarily switch transmission output to low
Hi Low, Low Low
Key states are backed up, except in the PC mode when
Scan
Press this key starts scanning. Pressing this key stops
Scan Del/Add
Used to select whether system scan routines are used
Scan temporary delete
This key is temporarily deleted a system being scanned.
This key operates even when "Scan Type" is set to "List
Scrambler
If a scrambler code (1 to 4) has been set in the FPU, an
Holding this key down for 2 seconds sets Scramble Code