Description Of Functions (Fixed Ports) - Kenwood TK-7160 Modification Information

1.4 Description of Functions
(Fixed Ports)
This section describes ports other than the Function
Port.
1.4.1 SB (CN2-Pin1)
This port can be used to output the battery voltage in
conjunction with the power.
The current rating is 250 mA. The instantaneous
maximum current of this port is approximately 700 mA.
Therefore, this port can be used for KDS-100.
1.4.2 GND (CN2-Pin3)
This GND can be used for external devices.
1.4.3 IGN (CN3-Pin1)
This input port functions in conjunction with the
Ignition.
Refer to 2.3 Ignition Sense Cable for instructions to
install the port.
KCT-39 also has this port.
Note that the port is not used for KDS-100 and
KGP-2A/ KGP-2B.
Note: This port outputs voltage regardless of the power status
when R95 on the PCB is not removed. Approximately 90%
of the battery voltage is output when a load of 39kΩ is
applied since the internal resistance is approximately 4.7kΩ.
1.4.4 DATAI (CN3-Pin2)
This input port can be used for external signaling
devices.
An audio signal input here is transmitted via this port
without passing through the Pre-emphasis circuit. The
audio signal must not be excessively high level since
the audio signal is passed to the modulation control
circuit.
The input tone bandwidth is 10 Hz to 3 kHz.
KCT-39 also has this port.
This port can be used for KDS-100 and KGP-2A/
KGP-2B.
MOD (K)/Ver. 2.00
1.4.5 DETO (CN3-Pin3)
This output port can be used for external signaling
devices.
The port outputs a demodulated signal that has not
passed through the De-emphasis circuit.
The output tone bandwidth is 10 Hz to 3 kHz.
KCT-39 also has this port.
The port can be used for KDS-100 and KGP-2A/
KGP-2B.
1.4.6 TXAFI (CN3-Pin4)
This port can be used to input a transmit signal for the
Scrambler.
The port can be used with the TXAFO port when the
Scrambler is used.
1.4.7 TXAFO (CN3-Pin5)
This port can be used to output a transmit signal for
the Scrambler.
The port can be used with the TXAFI port when the
Scrambler is used.
The port outputs the audio signal from the microphone
that has not passed through the Pre-emphasis circuit.
AC coupling is required to use this port.
1.4.8 EMGMIC (CN3-Pin6)
This port can be used to input an audio signal from the
Emergency Microphone.
A bias of 5 V is applied to a condenser microphone.
AC coupling may be required depending on type of
microphone used.
1.4.9 RXAFO (CN3-Pin7)
This port can be used to output received audio for the
Scrambler.
The port can be used with the RXAFI port when the
Scrambler is used.
The port outputs a demodulated signal (300 Hz to
3 kHz) that bypasses the De-emphasis circuit.
Confidential
1 PORT FUNCTIONS
CONTENTS
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