Operating Tnc - Kenwood TM-D700A Instruction Manual
144/440 and 144/430 mhz fm dual banders
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- Instruction manual (99 pages) ,
- Operation instruction manual (20 pages) ,
- Service manual (68 pages)
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OPERATING TNC
This transceiver has a built-in TNC which conforms to
the AX.25 protocol. This protocol is used for
communications between TNCs. The TNC accepts data
from your personal computer and assembles it into
packets. It then converts packets to audio tones which
the transceiver can transmit. The TNC also takes audio
tones from the transceiver, converts them to data for the
computer, and checks for errors in the data.
The TNC mainly functions in Command or Converse
mode. First learn the difference between these two
modes.
•
Command mode
When you select Packet mode, the TNC enters this
mode. A "cmd:" prompt appears on the computer
screen. You can type commands from the computer
keyboard to change the settings on the TNC. When
in Converse mode, press [Ctrl]+[C] on the keyboard
to restore the Command mode.
•
Converse mode
The TNC enters this mode when a linkage with the
target station is established. On the computer
keyboard, type an appropriate command and if
necessary a message, then press [Enter] or
[Return]. What you type is converted into packets
and transmitted over the air. When in Command
mode, type CONVERSE to restore the Converse
mode; you can also type CONV or K instead.
For the commands supported by the built-in TNC, see
"TNC COMMANDS LIST" on page 41.
The following indicators appear on the transceiver
display to show the current TNC status:
I
d n
c i
t a
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T
N
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1
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0
0
1
2
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b
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9
6
0
0
9
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0
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b
p
s
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a r
The built-in TNC includes a simple mailbox to directly
receive mail from other stations; the mailbox holds up to
approximately 110 kilobytes (KB) of information. You
can read mail from the mailbox by sending a command
from your personal computer {page 47}.
Note:
Not all functions available via conventional TNCs 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. WD6BQD-1 to WD6BQD-
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.
t S
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3
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