Connections - AEA COMPUTER PATCH CP-1 Instruction Manual

POWER
The CP-1 requires a 12-16 VAC power source (supplied with unit)
capable of supplying 400 ma. The power connector is a 2.1 mm center
pin coaxial type.
AUDIO
The audio IN/O UT jacks are 3.5 mm phone jacks and are in parallel in
the CP-1. The audio IN (input) jack is used to provide the CP-1 with
audio (CW, RTTY) signals from the transceiver. Receiveraudio should
be taken from the external speaker output of your receiver. Do not
draw audio from the headphone, tape out, or phone patch out jacks;
because frequently, manufacturers w ill install some resistance in the
leads to cut down audio level or impedance match.
KEY IN
Straight key, or positive keyer input. In the CW mode, this input keys
the + and - keying transistor switches. In the RTTY mode, it generates
narrow shift AFSK (about 50 Hz) for CW identification in RTTY. It is
also useful for Morse sending practice by m onitoring your fist on the
CRT attached to your com puter (providing you have Morse receiving
software). This input is only active when the CP-1 is turned on.
SCOPE OUT
The mark and space filte r outputs are provided at these connections
for tuning RTTY signals with the aid of an X-Y scope.
KEY OUT/ +, -
The + and - keyed outputs are fo r CW keying of the transm itter.
The + key output is for use with transistor (direct) keying. The key
output is for use with transm itters using grid block keying. Connect a
line from one of these jacks to the key/input on your transceiver. If you
do not know whether your rig is + keyed or - keyed, then simply insert
the cable into either the + or the - key outputs. If you suddenly hear
your side tone go on and stay on, then insert the cable into the
opposite key out jack. Remember to place your mode switch on your
radio in the CW mode when perform ing this test.
DEMOD OUT
TTL level low on space tone or CW (Ov). High mark tone or lack of
signal (5v). This output can also be used to drive a current loop circuit.
Appendix A shows a loop keying circu it that w ill perform the task of
driving a current loop. If you wish, you could also purchase the AEA
model RS-232-1 option that w ill perform as an isolated current loop
keying circuit.

CONNECTIONS