FELCOM 82
H3-35
- El AXIS (OK/NG)
When the elevation axis control circuit is abnormal, NG comes on.
- AZ AXIS (OK/NG)
When the azimuth control circuit is abnormal, NG comes on.
- Cross El AXIS (OK/NG)
When the cross-elevation axis control circuit is abnormal, NG comes on.
TX/RX channels
- Rx Channel
Receiving channel in use is displayed. Inmarsat B system uses CH6000 (1525
MHz) to CH14000 (1545 MHz). Default setting is CH06000 (1525 MHz).
At power up, when the elevation angle is changed, and when the ocean region is
changed,
1) MES searches the strongest spot beam in signal level.
2) After the completion of the channel scanning, the registration of the ocean
region is made on the NCS common channel. Thus the NCS knows the area
where MES locates.
- Tx Channel
Transmission channel in use is displayed. Inmarsat B system uses CH6000
(1626.5 MHz) to CH14000 (1646.5 MHz). Default setting is CH10000 (1636.5
MHz).
At every call request, MES sends AZ and EL data to NCS. The spot-beam
identities are advised to SES via the NCSC Bulletin Board to allow identification
of the appropriate spot-beam for signaling purposes. If appropriate spot-beam
signaling chancels are not available, the SES will select a global-beam channel.
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