Setting Internal Tnc - Kenwood TH-D74A User Manual

• A Packet path is the digipeat route of the packet data sent
from My station.
For example, if you want your packet to take the
[W5DJY-1] > [W4DJY-1] route, enter [W5DJY-1, W4DJY-1],
separating each digipeater Callsign with a comma.

SETTING INTERNAL TNC

Data Speed
The default APRS packet transfer rate set on the built-in TNC
is 1200 bps which is the standard among the current APRS
networks.
1 Access Menu No. 505.
2 Select [1200] or [9600] bps.
Note:
◆ You can also set the Packet transfer rate to 9600bps when
necessary.
Data Band
You can select data band for APRS mode independent of the
selection for Packet mode. Select band A or B as the data
band for receiving or transmitting APRS packets. The default
is band A. < > or <
data band.
1 Access Menu No. 506.
2 Select [A Band] or [B Band].
> indicates the current
DCD Sense
You can also select the method for inhibiting the built-in TNC
from transmitting.
1 Access Menu No. 507.
2 Select [Busy], [Detect Data], or [Off].
Inhibiting of the beacon, message, and other packet
transmission is suspended while any of the following
conditions is met. When the condition is no longer met, the
pending data is transmitted.
[Busy]:
a When already in transmission state as a result of the
user pressing [PTT].
b The data band is busy.
[Detect Data]:
a When already in transmission state as a result of the
user pressing [PTT].
b When the configured packet speed (1200 bps or 9600
bps) data is detected on the data band.
[Off(Ignore)]:
a When already in transmission state as a result of the
user pressing [PTT].
TX delay time
This function allows you to set a transmission delay time
between transmitting the APRS data and transmitting a flag
code prior to the APRS data.
1 Access Menu No. 508.
2 Select [100], [150], [200], [300], [400], [500], [750], or
[1000] ms.
Note:
◆ Set a small value as far as possible but ensure that the local
station transmitted data can be securely received at the other
station. Setting a large value greater than necessary will
prolong the time taken in occupying the frequency by the local
station transmitted data, thus decreasing the usage efficiency
of the frequency.
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