Kenwood TH-D72 User Manual 1 - Page 38

Packet Operation

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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 MODE This transceiver has a built-in TNC which conforms to the AX.25 protocol. This protocol is used for communications between TNCs. The baud rate of the PC (USB) port is 9600 bps for the PACKET mode operation. For the commands supported by the built-in TNC, see "TNC COMMANDS LIST". Press [TNC] 2 times 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. STA Packets to be transmitted still remain in the buffer. CON The TNC is in connection with the target station. 12 1200 bpspacket transfer rate selected. 9600 bps packet transfer rate selected. 96 (To set it to 9600bps, use the HB 9600 (or HBAUD 9600) TNC command. This cannot be changed through the TH-D72 menu.) DATA BAND Select how data will be transmitted and received on your transceiver. 1 Enter Menu mode and access Menu 197. 2 Set the data band to "A-Band" (A band receives and transmits), "B-Band" (B band receives and transmits), "A: TX B:RX" (A band transmits ( ) and B band receives ( )), or "A: RX B:TX" (A band receives ( ) and B band transmits ( )). 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. ◆ The internal TNC is a 2-chip type that does not have an SRAM backup. Therefore, the settings made using commands in Packet mode (except MYCALL (Menu.300: My Callsign will be set) and DAYTIME (Internal clock time will be set)) will be reset when the power is switched Off and then back On. ◆ The built-in TNC has 2k byte KISS mode data buffers for TX and RX. ◆ 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 callsign 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. PACKET - 1

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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
PACKET MODE
This transceiver has a built-in TNC which conforms to the
AX.25 protocol. This protocol is used for communications
between TNCs.
The baud rate of the PC (USB) port is 9600 bps for the
PACKET mode operation.
For the commands supported by the built-in TNC, see
“TNC COMMANDS LIST”.
Press
[TNC]
2 times 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.
STA
Packets to be transmitted still remain in the buffer.
CON
The TNC is in connection with the target station.
12
1200 bps
packet transfer rate selected.
96
9600 bps packet transfer rate selected.
(To set it to 9600bps, use the HB 9600 (or HBAUD
9600) TNC command.
This cannot be changed
through the TH-D72 menu.)
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.
◆
The internal TNC is a 2-chip type that does not have an SRAM
backup. Therefore, the settings made using commands in Packet
mode (except MYCALL (Menu.300: My Callsign will be set) and
DAYTIME (Internal clock time will be set)) will be reset when the
power is switched Off and then back On.
◆
The built-in TNC has 2k byte KISS mode data buffers for TX and
RX.
◆
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 callsign
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.
DATA BAND
Select how data will be transmitted and received on your
transceiver.
1
Enter Menu mode and access Menu 197.
2
Set the data band to “A-Band” (A band receives and
transmits), “B-Band” (B band receives and transmits),
“A: TX B:RX” (A band transmits (
) and B band
receives (
)), or “A: RX B:TX” (A band receives (
)
and B band transmits (
)).