Optional Voice Scrambler Function; Optional Ani Function; Code Setting; Voice Scrambler Board Connection - Kenwood TK-790 Service Manual

Fig. 4-1 Knob insertion
Fig. 4-2 Knob removal

3. Optional Voice Scrambler Function

The optional voice scrambler function can be used by two
methods.
1. Assign this function to the OPT key by using the pro-
gramming software (KPG-44D).
When the OPT key is pressed, the
on, and the optional (scrambler) function is enabled.
When the key is pressed again, the
off and the function is disabled.
2. Assign the optional scrambler function to each channel
by using the programming software (KPG-44D). The op-
tional scrambler function can be used without pressing
the OPT key.

3-1. Code setting

The code can be set by two methods.
1. Hold down the OPT key to enter the code setting mode.
Codes 1 to 16 will be displayed. Set a code by turning the
[Up/Down] knob. When the OPT key is pressed again,
the code setting mode terminates.
2. Set a code for each channel by using the programming
software (KPG-44D).
INSTALLATION

3-2. Voice scrambler board connection

• Modification
1. Remove the upper half of the case of the TK-790.
2. Remove R515 and R604 on the control unit (X57-561 B/
• Connection
561 B/3) are shown in the figure.
via the E37-0808-05 connector cable.

4. Optional ANI Function

• Connection
0809-05 connector cable, and the CN508 connector to the
ANI board via the E37-0808-05 connector cable.
indicator comes
OPT
indicator goes
OPT
TK-790/
3) (Refer to page 21).
The functions of pins of CN508 on the control unit (X57-
Join the CN508 connector to the voice scrambler board
MCI (MIC signal input)
MCO (MIC signal output)
DEI (Detection signal input)
AC (Audio control signal output)
BC1 (Scramble code output 1)
BC2 (Scramble code output 2)
BC3 (Scramble code output 3)
BC4 (Scramble code output 4)
TXD2
RXD2
DEO (Detection signal output)
PTO (PTT signal output)
8C (8V output)
E (Earth)
Fig. 5
Join the CN507 connector to the ANI board via the E37-
SQ (Squelch signal output)
EMG (Emergency signal output)
EPT (External PTT signal input)
I/O (Auxiliary input/output)
SEL (Non connection)
AS2 (Audio mute input)
MCM (MIC mute input)
TON (Side tone input)
TCN (Speaker mute input)
DTI (Data input)
E (Earth)
8C (Common 8V output)
PTO (PTT signal output)
DEO (Detection signal output)
Fig. 6
( B ) /H ( B
Voice
CN508
scrambler
1
14
CN507 ANI board
1
10
14
11
CN508
17
)