      7   6   5   4   3   2   1   0   7   6   5   4   3   2   1   0   7   6   5   4   3   2   1   0   7   6   5   4   3   2   1   0
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
00  | Enable send alias             | Unused set to 0x00                                                                         ...
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
1c   ...                                                            | Talker alias display          | Talker alias encoding         |
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
20  | Unused set to 0x00                                            | AutoRep UHF 2 offset index    | AutoRep VHF 2 offset index    |
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
24  | AutoRep VHF 2 minimum frequency in 10Hz, 8-digit BCD, big-endian.                                                             |
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
28  | AutoRep VHF 2 maximum frequency in 10Hz, 8-digit BCD, big-endian.                                                             |
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
2c  | AutoRep UHF 2 minimum frequency in 10Hz, 8-digit BCD, big-endian.                                                             |
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
30  | AutoRep UHF 2 maximum frequency in 10Hz, 8-digit BCD, big-endian.                                                             |
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
34  | Unknown                       | GPS mode                      | Unknown settings                                           ...
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
fc   ...                                                                                                                            |
    +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+

Field description:
 - Talker alias display: 0=off, 1=contacts, 2=air.
 - Talker alias encoding: 0=ISO-7, 1=ISO-8, 2=Unicode.
 - AutoRep UHF 2 offset index: 0-based, 0xff = off.
 - AutoRep VHF 2 offset index: 0-based, 0xff = off.
 - GPS mode: 0=GPS, 1=BDS, 2=both;
