USER'S GUIDE
INSTALLATION
PK232UG Rev. B 9/86
2-2
20
2.1.3.3
Radio Input and Output Connections
(See Table 1-1)
AEA has supplied two shielded cables for connecting your PK-232 to one or two radios.
One end is already pre-wired with a 5-pin Molex-type plug. You must supply and con-
nect the plug for the end that connects to you radio's microphone receptacle or PTT
and phone patch and tone inputs.
NOTE:
Don't prepare both cables yet. Set one cable aside for use as a test cable
during your first "loopback" experiments with Packet-Radio operation.
The following signals at five-pin receptacles J4 and J6 pass between your PK-232 and
radio. The pinout is shown in Table 2-1.
Pin
Signal Name
Description
1
2
3
4
5
Receive audio
Microphone audio
Squelch input
Ground
Push-To-Talk
AFSK from receiver to PK-232
AFSK from PK-232 to transmitter
Allows PK-232 o detect activity on
a shared mode channel (optional)
Audio and PTT common return
PK-232 keys transmitter
Table 2-1 J4 and J6 Radio Port Connectors
2.1.3.4
Computer Connections
(See Table 1-2)
The PK-232's rear-panel serial-port connector carries data and control signals between
your computer and the PK-232. The minimum number of pins that must be connected
is shown in Table 2-2.
The PK-232 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-232 the same way. Use any ter-
minal program you now use with your modem.
IMPORTANT NOTE
If the full RS-232 cable set is used, DO NOT CONNECT any pins other than pin 1 trough
8, and pin 20! The remaining pins 17 trough 19 and 21 through 25 have been reserved
for future use. Connection of a full RS-232 wire set will cause improper operation of your
PK-232. The minimum connections shown do not permit hardware flow control.
Pin
Signal Name
Description
2
3
7
Transmit Data
Receive Data
Signal Ground
Serial data from computer to PK-232
Serial data from PK-232 to computer
Common ground for both data lines
Table 2-2 Minimum Serial Port Connections Required by PK-232
