Kenwood TK-3312 Instruction Manual 1 - Page 5

Terminal Descriptions - microphone

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TERMINAL DESCRIPTIONS Speaker/ Microphone Jacks You can use a resin-based cover for the Speaker/ Microphone jacks. No. Name 1 PTT / RXD 2 MIC 3 MICIN 4 OPTDET 5 5M 6 AE 7 TXD 8 NC 9 SPO 10 SPI Description External PTT Input / Serial Data Input External MIC Input Internal MIC Output External Option Detect 5V Output GND Serial Data Output No Connection Audio Input Received Audio Output Impedance I/O CMOS I 1.8 k I 1.8 k O High Impedance I 100  O GND − CMOS O − − 8  I 8  O Antenna Terminal 50  impedance Battery Terminal The battery terminal uses a spring plate. The negative terminal connects to the chassis ground. The battery is mounted on the rear side of the transceiver using a latch mounting method. Firmware Copyrights The title to and ownership of copyrights for firmware embedded in KENWOOD product memories are reserved for JVC KENWOOD Corporation. iii

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iii
TERMINAL DESCRIPTIONS
Speaker/ Microphone Jacks
You can use a resin-based cover for the Speaker/ Microphone
jacks.
No.
Name
Description
Impedance
I/O
1
PTT / RXD
External PTT Input / Serial
Data Input
CMOS
I
2
MIC
External MIC Input
1.8 k
I
3
MICIN
Internal MIC Output
1.8 k
O
4
OPTDET
External Option Detect
High Impedance
I
5
5M
5V Output
100
O
6
AE
GND
GND
−
7
TXD
Serial Data Output
CMOS
O
8
NC
No Connection
−
−
9
SPO
Audio Input
8
I
10
SPI
Received Audio Output
8
O
Antenna Terminal
50
impedance
Battery Terminal
The battery terminal uses a spring plate.
The negative terminal connects to the chassis ground.
The battery is mounted on the rear side of the transceiver using a
latch mounting method.
Firmware Copyrights
The title to and ownership of copyrights for firmware embedded in
KENWOOD product memories are reserved for JVC KENWOOD
Corporation.