AEA COMPUTER PATCH CP-1 Instruction Manual page 8

TTL
(Also see RF Shielding, page 7)
To computer, 5 pin connector (supplied), TTL levels
Pin 1 - PTT; active low send
Pin 2 - RTTY input; space low, mark high
Pin 3 - CW input; active low
Pin 4 - Ground
Pin 5 - Demodulator output; space low, mark high
Note: This connector is wired w ith Pin 5 being on the left hand side
o f the connector viewing the unit from the rear.
RS-232 I/O (OPTION)
Provides RS-232 level dem odulator output and RTTY or CW input.
Internal jumpers provided fo r 'term inal' or 'com puter' drive. This is
strictly an RS-232 level shift, it w ill not drive a printer or other such
devices, as the CP-1 is strictly a modem. It has no software for built-in
conversions.
TRANSCEIVER OUTPUT:
This connector handles all of the 'interfacing' to your transm itter
Pin 1 - AFSK out—A udio Frequency Shift Keying. This line is connected
to the (rnic) audio input o f your transceiver.
Pin 2 - PTT out. This is connected to the high side of the PTT line of
your transceiver. W iring examples are given in Appendix B for
some o f the more popular transceivers. If you have a transceiver
with negative PTT (such as the Drake T4XC) then follow
Appendix C.
Pin 3 - PTT GND. This is connected to the PTT
transceiver. Some transceivers require a separate ground and
others do not. If yours does, then w ire up pin 3 to your PTT
ground side. If yours does not, do not w ire up pin 3.
Pin 4 - Shield. This is the shield of the audio lead. Connect to the
ground pin o f your mic connector. This pin also normally serves
as the ground side o f your PTT circuit. See above (Pin 3).
REAR PANEL CONNECTIONS
4
side of your
g ro u n d