Specifications

CES SUPPORT 407-679-9440 Page 10 MAN71© CES 1996
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 radio PTT input to control the radio transmit function
2 RX Audio Analog Connect to radio discriminator or detector. Squelched/Speaker Audio can be used from
the high side of the volume control. If squelched audio is used, see table 2.7.1 for
configuration on JP7 &JP8.
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 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 Enable/ disable pull-up resistor
R25
IN
IN
OUT
JP4 TX audio output High Z
Low Z
OUT
OUT
IN
JP5 External COR Active high
Active low
IN
IN
OUT
JP6 RX audio input High Z
Low Z
OUT
OUT
IN
JP7/ JP8 Internal COR Discriminator
Squelched Audio
IN/OUT
JP7 IN/ JP8 OUT
JP7 OUT/ JP8 IN
2.8 Internal Adjustments
Internal COR Mobile Detector (R55)
(not required if External COR is used)
(1) Apply power to the 4700VP and the base station or repeater.
(2) Rotate R55 clockwise until “COR” led DS5 illuminates. Rotate R55 counter clockwise until led DS5 extinguishes.
(3) Generate carrier to the base station or repeater and verify that DS5 illuminates when carrier is present and extinguishes
when carrier is removed.