CES SUPPORT 407-679-9440
Page 9
MAN71© CES 2010
2.6 Radio Interface Connection
Table 2.6.1 DB-9 Radio Interface Connector
Pin
Function
Signal
Description
1
PTT output
Digital.
Open
Collector
Connect to the radios Push to Talk input to control the radio transmit function.
2
RX Audio
Analog
Connect to the radios discriminator or detector. Although
NOT
recommended,
squelched/speaker audio can be used.
******SEE NOTE ON FOLLOWING PAGE******
3
N/C
N/A
4
CTCSS logic i/p
Digital
This input is normally connected to a radio or external CTCSS/DPL decoder output to
provide additional system security. When installed, the 4700VP will only connect when
the proper CTCSS/DPL is detected by the decoder and its output changes state. This input
is user programmable for active high or active low.
5
Ground
Power
Connect to a suitable ground point in the radio
6
TX Audio
Analog
Connect to the microphone/audio input of the transceiver / transmitter.
7
N/C
N/A
8
External COR
Digital
Use this pin on applications where discriminator audio is not used (squelched audio is
used). This input is user programmable for active high or active low, and can also be
connected to an external CTCSS/DCS decoder output.
9
Power (12vdc)
Power
Connect to switched radio voltage. Range 10 - 15 V DC.
2.7 Jumper Selections
Table 2.7.1 Jumper Configuration
Jumper No.
Function
Description
Default
Position
JP1
Voice audio delay (optional)
No voice audio delay installed
Voice audio delay installed
IN
IN
OUT
JP2
Emphasize audio
Discriminator audio
Squelched audio ( speaker)
IN
IN
OUT
JP3
CTCSS logic input
Active Low
Active High
IN
IN
OUT
JP4
TX audio output
High Z
Low Z
OUT
OUT
IN
JP5
External COR
Active Low
Active High
IN
IN
OUT
JP6
RX audio input
High Z
Low Z
OUT
OUT
IN
