Radio Input And Output Connections; Computer Connections - Advanced Electronic Applications PK-88 Operating Manual

PK-88 OPERATING MANUAL
2.2.2 Radio Input and Output Connections (See Table 2-1)
We supply a shielded cable with your PK-88. You must supply and connect the plugs for
the cable ends. This cable connects your PK-88 to your radio's microphone receptacle or
PTT and phone patch/tone inputs.
NOTE:
Four signals and ground pass between your PK-88 and your radio via eight-pin receptacle
P2. The pin wiring is shown in Table 2-1.
Pin 2.4
1 Ground
3 Push-To-Talk
2 Microphone audio
8 Receive audio
7 Squelch input (Optional)
NOTE: The remaining pins are not connected.
2.2.3 Computer Connections (See Table 2-2)
NOTE:
The PK-88's rear-panel serial port connector carries data and control signals between your
computer and the PK-88. The PK-88 is connected to a computer just like you connect a
RS-232C modem. If you now use your computer with a modem, connect the PK-88 the
same way. Use any terminal program you now use with your modem. The minimum num-
ber of pins that must be connected is shown in Table 2-2.
NOTE:
Table 2-2
Wire only the PK-88 cable end at this time. Leave the "radio" end unwired.
You will use the radio cable in a test configuration during your first 'loopback'
experiments with Packet operation.
Signal Name
Table 2-1
The serial interface in the PK-88 comes from the factory configured for RS-
232C voltage levels. Please see Appendix B for the TTL header installation in-
structions if your computer does not support RS-232C.
The following are the least number of wires you can use to connect the PK-
88 with a computer or terminal. This three-wire connection does not permit
hardware flow control. In this case, software flow control (XON-XOFF) must
be provided by the terminal program.
Pin Signal Name
2 Transmit Data
3 Receive Data
7 Signal Ground
Minimum Serial Port Connections Required by PK-88
Color 2.2.6
Brown Audio and PTT common return
Red PK-88 keys transmitter
White AFSK from PK-88 to transmitter
Green AFSK from receiver to PK-88
Black Allows PK-88 to detect activity on a
shared-mode-channel (optional)
J2 Radio Port Connector
Description
Serial data from computer to PK-88
Serial data from PK-88 to computer
Common ground for both data lines
2 - 2
Description
INSTALLATION
PK-88 - 18