24
TK-780/H
INSTALLATION
5. Connection Cable (KCT-29 : Option)
The KCT-29 connection cable kit is used to connect the
TK-780/780H transceiver to the KPG-1A Modem GPS Re-
ceiver or the KPG-1B Modem GPS Controller.
5-1. Installing the KCT-29 in the transceiver
1. Remove the upper cover from the transceiver.
2. Lift the DC cord bushing (
1
) from the chassis.
3. Remove the pad as shown in Figure 5 (
2
).
4. Insert the KCT-29 cable (
3
) into the chassis (
4
). The
wire harness band (
5
) must be inside the chassis.
5. Replace the DC cord bushing (
6
).
6. Connect the KCT-29 to the TX-RX unit (A/2) as shown in
Figure 6 (
7
).
KCT-29
B
D
C
CN2
CN3
CN4
C
D
B
A
3
4
6
7
5
CN1
B
1
2
Fig. 5
Fig. 6
6. Interface Cable (KCT-31 : Option)
The KCT-31 is a RS-232C interface cable for LMR mobile
radios, TK-780/780H.
The 9-pin (D-sub) connector is connected to an external
RS-232C terminal. The other end of the cable is connected
to the internal connector of LMR mobile radio.
Note : You cannot write a firmware with the KCT-31.
6-1. Features
• This KCT-31 has a RS-232C-TTL level interface circuit.
• This KCT-31 does not require an external power supply.
• This KCT-31 can be used up to 9600 bps.
• Compatible with an ER terminal of DTE that has the volt-
age 6V or more.
6-2. Terminal function (D-sub connector)
Pin No.
I/O
Port name
Function
1
I
CD
Carrier detect
2
I
RD
Receive data
3
O
SD
Transmit data
4
O
ER
Data terminal ready
5
–
SG
Signal ground
6
I
DR
Data set ready
7
O
RS
Request to send
8
I
CS
Clear to send
9
–
CI
Ring indicator
1
5
6
9
