Communication
The COM unit of the satellite consists of two parts: a modem part and a radio part. The modem is a MX909 modem-chip which runs at 9600 baud and features GMSK, scrambling, checksumming, forward error correction and interleaving while using the Mobitex standard.
Read more about Mobitex and MX909:
mx909a.pdf
gmsk.pdf
The radio is the SX450 from Wood And Douglas with a transmitting power of 500 mW.
Design space (click to enlarge):
- New Documentation -
Article about
link budget
- Old Documentation -
Please notice that the follwing report is outdated and contains some minor and major errors.
Report (pdf)