Kenwood RC-D710 - Manual (Page 34)

PACKET OPERATION
Connect this transceiver to your personal computer via a Terminal Node Controller (TNC). You can send messages
or commands to far away stations, obtain a variety of information via your local bulletin boards, or enjoy other Packet
applications. Reference material for starting Packet operation should be available at any store that handles Amateur
Radio equipment.
Note: When the distance between the radio antenna and your personal computer is too close, interference may occur.
PACKET-1
DATA terminal pins (TM-V71)
No. Name I/O Function
q PKD I Audio signal for packet transmission
w DE — PKD terminal ground
e PKS I
‘L’ is transmitted and the microphone is
muted
r PR9 O Detected 9600 (bps) data
t PR1 O Detected 1200 (bps) data
y SQC O
Squelch control signal; Closed: ‘L’, Open: ‘H’
(The default settings can be changed in
Menu 520)
COM terminal pins
No. Name I/O Function
q RTS O Request to Send
w CTS I Clear to Send
e TXD O Transmit Data
r GND — Ground
t RXD I Receive Data
y NC — Non Connect
u NC — Non Connect
i NC — Non Connect
PACKET MODE
This transceiver has a built-in TNC which conforms to the
AX.25 protocol. This protocol is used for communications
between TNCs.
For the commands supported by the built-in TNC, see
“TNC COMMANDS LIST”.
Press [TNC] 2 times (or press [TNC]) to enter PACKET
mode.
The following indicators appear on the transceiver display
to show the current TNC status:
Indicator Status
PACKET The TNC is in Packet mode.
12 1200 bps packet transfer rate selected.
96 9600 bps packet transfer rate selected.
STA Packets to be transmitted still remain in the buffer.
Indicator Status
CON The TNC is in connection with the target station.
MBOD
The mailbox in the TNC is being accessed or
connected by the other station.
MAIL
The mailbox in the TNC holds mail addressed to
you.
The following displays appear when using RC-D710 +
PG-5J.
PKS: Status of the PKS terminal. Lights when it is “H”
(request to send).
SQC: Status of the SQC terminal. Lights when it is “H”
(busy).
GPS: Blinks when the GPS receiver connects and the
status is determined.
Note:
◆
Not all functions available via conventional TNC’s are supported
by the TNC built in this transceiver.
◆ The built-in TNC could be automatically reinitiated when
its malfunction is detected; this does not designate that the
transceiver is defective.
◆ To distinguish your various stations or nodes, you can have up
to 15 Secondary Station Identifiers (SSIDs); ex. W6DJY-1 to
W6DJY-15. You always have to put a dash between your call sign
and SSID number.
◆ Packet operation, easily affected by transmit and receive
conditions, requires a full-scale S-meter reading for reliable
communication. When the S-meter reads less than maximum
during 9600 bps operation, communication errors are frequent.
• When using the RC-D710, the DATA
terminal is not used.
• The COM terminal is on the rear of the
RC-D710. Connect these terminals to
a personal computer; do not connect
a computer to the PC terminal of the
TX/RX unit.