3
TK-780/H
5. INSTALLATION PLANNING – CONTROL STATIONS
5-1. Antenna system
Control station. The antenna system selection depends
on many factors and is beyond the scope of this manual.
Your KENWOOD dealer can help you select an antenna sys-
tem that will best serve your particular needs.
5-2. Radio location
Select a convenient location for your control station radio
which is as close as practical to the antenna cable entry
point. Secondly, use your system’s power supply (which
supplies the voltage and current required for your system).
Make sure sufficient air can flow around the radio and power
supply to allow adequate cooling.
SERVICE
This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and align-
ment procedures contained in this manual.
Note
When you modify your radio as described in system set-
up, take the following precaution.
The rating of pin 7 (SB) of the accessory connector cable
(KCT-19) on the rear of the radio is 13.6V (1A). Insert a 1A
fuse if you use the SB pin for external equipment.
Accessory connector
cable (KCT-19)
If you do not intend to use the 3.5-mm jack for the exter-
nal speaker, fit the supplied speaker-jack cap (B09-0235-05)
to stop dust and sand getting in.
GENERAL / OPERATING FEATURES
Speaker-jack cap
(B09-0235-05)
1. Operation Features
The TK-780/780H is a VHF FM radio designed to operate
in both trunking format (LTR model) and conventional for-
mat (Conventional model). The programmable features are
summarized.
Model
Trunking format
Trunking mode
Conventional format
Conventional mode
1-1. Trunking Format
This format can handle up to 32 systems with up to 250
groups in each system. The transceiver can be used in both
trunked mode and conventional mode. Systems, groups,
and their functions are programmed.
1-2. Conventional Format
This format can handle up to 250 groups with 250 chan-
nels in each group. The transceiver can be used only in con-
ventional mode. Groups, channels, and their functions are
programmed.
2. Transceiver Controls and Indicators (Fig. 1)
2-1. Front Panel Controls
All the keys on the front panel are momentary-type push
buttons. The functions of these keys are explained below.
• POWER key
Transceiver POWER key. When the power is switched
off, all the parameters, such as the system and group in
trunking format, and the group and channel in conventional
format, are stored in memory. When the power is switched
on again, the transceiver returns to the previous conditions.
• SYSTEM UP/DOWN key
(Trunking format, programmable)
• GROUP UP/DOWN key
(Conventional format, programmable)
• SCAN key (Programmable)
• MONITOR key (Programmable)
• A, B, C and D key (Programmable)
• VOLUME UP/DOWN key (Programmable)
• BUSY/TX LED
The BUSY indicator (Green LED) shows that the channel
is in use. The TX indicator (Red LED) shows that you are
transmitting.
1
3
+
–
7
6
13
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