Earth station for portable mobile satellite data communication (non-geostationary)
(Item 14-2 of Article 2 Paragraph 1 of Certification Ordinance)




Items

Technical standards

Class of emissions G1D
Assigned frequency or designated frequency 148 - 150.05MHz
(Receiver frequency: 137 - 138MHz)
Number of channels or channel separation 820
2.5kHz
Tolerance of frequency (×10-6) 20
Tolerance of occupied bandwidth 5kHz
Tolerance of spurious and unwanted emission intensity
Unwanted emission :
  50µW / 4kHz or -60dbc / 4kHz
Spurious emission :
  -60dBc
Antenna power Designated value 5W or less
Tolerance +20%, -50%
Transmission rate of modulation signal 2400 bps or less
Limit of secondary radiated emissions 4nW
Characteristics of overall operation 1) Simplex operation
2) Automatic frequency selection by control signal from the satellite station
3) The station shall start transmission only when it receives a control signal from the satellite station
4) The station shall be able to limit the transmission time for all or part of the transmission frequency band according to a control signal from the satellite station, and the transmission time shall be 450 ms or less
Note ----

Notice: Regulations in the Ordinance Regulating Radio Equipment shall have priority over the descriptions in the sheet when any difference is found between them. Further above descriptions do not cover all of the regulations.

Copyright 2006 TELECOM ENGINEERING CENTER.