Automatic Packet Reporting System (APRS)

Frequency   : 144.390 MHZ ( bagi negara Malaysia-Indonesia-Thailand-Amerika Utara)
Mode           : NFM
Modulation  : AFSK (1200bd)
Bandwidth   : 10k Hz
Protocol      : AX.25
Decoding Software (most popular) :

1. UI-View
2. Win APRS
3. XASTIR
4. aprsdroid
5. aprs/ce

Soundcard modem (most popular)

1. UZ7HO