Codan Radio Communications VT-3-150-SN User Manual
Transmitter Main Board Instruction Manual
4-1
4
TRANSMITTER INTERCONNECT PIN DEFINITIONS
The MT-3 series Transmitter employs a 48 pin Eurostandard connector for interfacing to all
transmitter power, audio, and control functions. The following are the MT-3 series Transmitter
backplane connections to the M-3 Motherboard.
transmitter power, audio, and control functions. The following are the MT-3 series Transmitter
backplane connections to the M-3 Motherboard.
Pin
Name
Pin
Name
Pin
Name
D2
No Connect
B2
+13.8 Vdc
Z2
+13.8 Vdc
D4
No Connect
B4
MIC Out
Z4
MIC In
D6
No Connect
B6
+9.5 Vdc
Z6
+9.5 Vdc
D8
No Connect
B8
Relay Positive
Z8
Relay Negative
D10
No Connect
B10
PTT WTO
Z10
PTT WTO
D12
No Connect
B12
Tx Standby
Z12
Tx Standby
D14
No Connect (IMC1)
B14
PTT NTO
Z14
PTT NTO
D16
No Connect (IMC2)
B16
No Connect (MT-2 +9.5V)
Z16
No Connect (MT-2 +9.5V)
D18
No Connect (IMC3)
B18
Balanced Input 2
Z18
Balanced Input 1
D20
Channel Select 0 (LSB)
B20
Squelched,De-emph Audio
Z20
Squelched, Flat Audio
D22
Channel Select 1
B22
Subtone Input 1
Z22
Tx Audio Control
D24
Channel Select 2
B24
PTT Output
Z24
Subtone Input 2
D26
Channel Select 3 (MSB)
B26
Forward Power Sense
Z26
Reverse Power Sense
D28
Synth Tx Data (Output)
B28
Monitor Out
Z28
Direct Mod Input
D30
Synth Rx Data (Input)
B30
Ground
Z30
Ground
D32
Synth Bootstrap (Input)
B32
Ground
Z32
Ground