Kantronics KPC-9612, Getting Started And Reference Manual

Page: 57 / 81

KPC-9612 Version 5.2 July 19, 1994
57
Connecting to your Radios
1200 Baud
The 1200 baud radio connector on the KPC-9612 rear panel is a 9-pin DB style connector. The pin
layout is shown on the FCC label on the bottom of the unit, and the purpose of each pin is:
Pin number Pin name Function
1
2
3
4
5
6
7
8
9
TXA
XCD
PTT
CTLB
RXA
GND
EXT_IN
CTLA
GND/RESET
Transmit audio (AFSK out)
External carrier detect
Push-to-Talk
Control line B
Receive audio
Ground
Jumper selectable input - See Jumper
section for details
Control line A
Ground (may be configured for external
hard reset. See Jumper section for details)
Pin 1 Connects to your microphone input of your radio, providing the audio signal to be transmit-
ted.
Pin 2 When a ground is applied to this pin and the KPC-9612 CD command is set to EXTERNAL,
the KPC-9612 will not transmit packet. This is normally used as an external means of sup-
plying carrier detect to the KPC-9612.
Pin 3 When the KPC-9612 needs to key your transmitter, it will apply a ground to this pin. This is
an open-drain circuit and requires a positive voltage from your radio (not to exceed 50 volts
and 200 mA).
Pin 4 This pin is the CONTROL B output from the KPC-9612 which may be used as a control line
to your radio or other devices. It is an open-drain circuit, and will apply a ground on this
pin when controlled by the CTRL command in your KPC-9612 (not to exceed 50 volts and
200 mA).
Pin 5 Receive audio from your radio connects to this pin. This normally will connect to the exter-
nal speaker jack on your radio, but may connect to the receive audio pin on your micro-
phone connector (if available).
Pin 6 This pin connects to the ground of your radio mic connector.
Pin 7 This pin is not connected in theKPC-9612, but may be configured for an external hard reset
or to supply power to the KPC-9612 using jumpers J16 and J17. See the Jumper section for
details.
Pin 8 This pin is the CONTROL A output from the KPC-9612 which may be used as a control line
to your radio or other devices. It is an open-drain circuit, and will apply a ground on this
pin when controlled by the CTRL command in your KPC-9612 (not to exceed 50 volts and
200 mA),
Pin 9 This pin is connected to ground as shipped from the factory. You may re-configure this pin
to perform an external hard reset by using jumper J21. See the Jumper section for details.