22
4
PROGRAMMING A GROUP CODE
Using a group code relieves you from receiving
unwanted packets. The APRS on this transceiver
supports the following three types of group codes.
All calls:
Program a 6-digit code that always starts with AP. You
will receive all APRS packets which include AP in group
codes. It does not matter whether or not the subsequent
4 digits match. The default on this transceiver is
APK101.
Note: APRS packets, which are generated via various methods, include
various codes instead of group codes. Using “All calls” allows you to
receive packets which include the following codes:
Special:
Enter “SPCL”. You will receive only APRS packets that
include SPCL as a group code. This code is generally
programmed by all stations at a special event.
Alternate net:
Program any other code with a maximum of 6 digits.
You will receive only APRS packets that include the
exact same code. In order to reject other packets, this
code should not include characters specified by the
above two types.
Note: Menu 3–E allows you to enter up to 9 digits (not just 6 digits)
because of possible future enhancement of the group code system.
1 Press [MNU] to enter Menu mode.
2 Press [
c
c
c
c
c
]/ [
d
d
d
d
d
] to select “UNPROTOCOL (3–E)”,
then press [OK].
•
The display for entering a group code appears; the first
digit blinks. The default is APK101 (All calls).
3 Turn the Tuning control to select a character.
•
You can enter 0 to 9, A to Z, and –.
4 Press [
a
a
a
a
a
].
•
The cursor moves to the next digit.
5 Repeat steps 3 and 4 to enter up to 9 digits.
6 Press [OK] to complete the setting.
7 Press [MNU] to exit Menu mode.
The keypad on the MC-53DM also is available to enter
alphanumeric characters in step 3. See page ii.
S
P
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Summary of Contents for TM-D700A
Page 55: ......
