Interface Information - Icom IC-M803 Service Manual

SECTION 4
• REMOTE CONTROLLER
[MIC]
[MIC]
Pin
MIC
number
1
2
8-pin
3
1
7
4
2 8 6
3 5
5
4
6
Front panel view
7
8
• TRANSCEIVER FRONT PANEL (1)
[ACC]
[ACC]
Pin
ACC
number
1
2
3
8-pin
4
7 6
8
3 1
5 4
5
2
6
Front panel view
7
8

INTERFACE INFORMATION

Pin
Description
name
MIC+ Audio input from the microphone element. Input impedance: 1.74 kΩ ±20%
NC No connection.
Audio output related to the volume setting.
AF1
Connected to pin 4 in the microphone.
Audio input.
AF2
Connected to pin 3 in the microphone.
PTT PTT switch input.
GND Ground terminal for transceiver.
MIC‒ Ground terminal for MIC+.
AF‒ Ground terminal for AF1 and AF2.
EXT-SP CONTROLLER
Pin
Description
name
CWK CW and FSK keying input.
AF GND Ground terminal for AF.
Input/Output terminal.
SEND
Transmits when grounded.
Modulator input.
MOD
- Usable when pin 3 is grounded.
Audio detector output.
AF
- Fixed, regardless of [VOL] position.
NC No connection.
13.6 V 13.6 V output when power is ON.
ALC ALC voltage input.
When grounded, transmits.
ACC
Input level:
Ground level:
Input current:
Input impedance: More than 10 kΩ
Input level:
Output impedance: Less than 4.7 kΩ
Output level:
Output current:
Control voltage: −3~0 V
Input impedance: More than 10 kΩ
4-1
Specification
–
–
–
–
–
–
MAINTENANCE
Specification
−0.5~+0.8 V
–
−0.5~+0.8 V
Less than 20 mA
Approximately
100 mV rms
100~300 mV rms
–
Less than 1 A