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USER'S GUIDE
4.6.3
Set Up Loopback Test Circuit
Do these steps in the exact order shown:
1.
Get the shielded radio cable you set aside in Chapter 2.
2.
Strip an tin the wires at the "radio" end of the cable.
3.
Join the green and white wires coming from pins 1 and 2.
4.
Insert the plastic plug end of the cable into J6, the "RADIO 2" connector on the PK-
232's rear panel. Be sure that the plug is insert with the cable running downward.
5.
Set the front-panel "Radio 1/Radio 2" switch to "RADIO 2".
You've connected your PK-232's transmit audio output to its receive audio input. Your PK-
232 can now "talk to itself" in "loopback".
4.6.4
"Connect" and "Disconnect"
Packet-Radio contacts begin with a connect process that sets up the "handshaking" be-
tween the two stations to insure error-free communications. Contacts or "connections" are
ended by a disconnect process that leaves both stations free to start new contacts.
Packet connections can also use digipeaters – other Packet stations that relay packets au-
tomatically from one station to another over a specified route. We're going to "connect"
your PK-232 to itself to see how this works. You've already set the PK-232 up in loopback;
therefore, your PK-232 will receive all the packets that it sends.
4.6.5
LED Status and Mode Indicators
Your PK-232's front-panel LEDs show you the operating mode and system status at any
moment. Each LED is marked with an abbreviated name. Some LEDs have two name
markings. All markings referring to packet operation are below the LEDs.
MULT Multiple
SEND Send
CONV
CMD
TRANS
PKT
DCD
4.6.5.1
LEDs at System Start or RESET
At system start-up or after selecting Packet, your PK-232 shows its status on the front-
panel LEDs:
STATUS:
MODE:
PK232UG Rev. B 9/86
Converse
Command
Transparent
Packet
Data Carrier Detect
CMD lit
PKT lit
Lit when multiple connections exist
Lit when PTT line is active
Lit when in the Converse Mode
Lit when in the Command Mode
Lit when in the Transparent Mode
Lit when in the Packet-Radio Mode
Lit when valid data signals received
4-19
OPERATING MODES
72
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