Kenwood TK-280 Service Manual page 5

9) 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. In Conventional format, this key
works as the voice scrambler code selector in the voice
scrambler code select mode.
10) Home Channel (Conventional Format)
Press this key once, the channel switches to the pre-
programmed home channel.
11) Home group (Trunking Format)
Each pressing of the key selects a preset system/group.
12) Key lock
Pressing this key causes the transceiver to accept entry of
only the [Function], [Key Lock], [PTT], [Lamp], [Monitor A],
[Monitor B], [Monitor C], [Monitor D], and [Emergency] keys.
The locked keys also include the tuning control.
13) Lamp
This key illuminates the LCD and keys on the front panel.
When the key is pressed, the LED lamp goes on.
When it is released, the lamp goes off after about five
seconds. If any key is pressed while the LED lamp is on,
the lamp is kept on for five seconds.
14) Memory
This key allows DTMF memory data to be recalled; up to 32
memories each with a memory dial of up to 16 digits
and an A/N of up to 10 digits per memory.
15) Monitor
Used to release signalling or squelch when operating as a
conventional. It is also used to reset option signalling.
16) Operator Selectable Tone (Conventional Format)
This key switches the pre-set decode QT/DQT and encode
QT/DQT to OST (Operator Selectable Tone) tone pair.
Press this key, the transceiver enters to OST select mode.
In this mode, the display shows "OFF" and the operator can
select one of the OST tone pair using the tuning control.
The display shows "TONE ∗∗" and tone pair No. ∗∗ is
selected.
Press OST key again, the transceiver exits from the OST
select mode, and returns to the group/channel mode with
the handset indicator ( ) means that the OST tone pair is
selected. OST tone pair number or OFF can be memorized
for each channel.
16 kinds of tone pair for OST can be programmed by KPG-
49D. OST is useful to access the repeater with same radio
frequency and different tone (QT/DQT).
17) Redial
Pressing this key when System/Group(trunking format),
Group/Channel (Conventional Format) is shown, displays the
OPERATING FEATURES
previously transmitted DTMF code. Pressing [PTT] at this time,
transmits the code that is currently displayed.
18) RF power low
19) Scan
20) Scan Del/Add
●
●
21) Scan temporary delete (Trunking Format)
22) Scrambler
23) System up/down (Trunking Format)
24) Talk Around (Conventional Format)
Used to temporarily switch transmission output to low power.
Turning the function on enables:
Hi→Low, Low→Low
Key states are backed up, except in the PC mode when
they are reset.
Press this key starts scanning. Pressing this key stops
scanning.
Trunking Format
Used to select whether system scan routines are used 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.
Conventinal Format
This key switches the currently displayed channel between
"Delete" and "Add".
The "Add" channel contained in the scan sequence, and
"Delete" channel is not contained. In the scan mode, this
key switches the channel delete or add temporarily.
This key is temporarily deleted a system being scanned. If
you press this key when scan is stopped (when a call is
being received from another station), the system is
temporarily deleted and scanning restarts.
This key operates even when "Scan Type" is set to "List
Type System Scan".
If a scrambler code (1 to 4) has been set in the FPU, an
underscore ("_") appears at the extreme right of the LCD
display when scrambler is active. Pressing this key changes
ON/OFF of scramble operation.
Holding this key down for 2 seconds sets Scramble Code
Select Mode
When the key is pressed each time, the system number to
be selected is incremented/decremented and repeats if held
for one second or longer.
Press this key, the transceiver uses the receive frequency
and the tone for transmission.
The operator can call the other party directory (without
repeater). Press this key again, the talk around function goes
off.
TK-280
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