Aligning an uplink dish?

mapperuo

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Sorry if this is in the wrong forum, Was hard to find a match.

So I was watching NASA TV last night and they had a remote broadcast from pretty much nowhere with what looks like a nice portable uplink dish, But out of nothing but pure curiosity, how does one align it? With a receive dish you atleast get feedback through a picture or not if you have it aligned.. Do they pop on a receiving LNB, align, then swap to an uplink LNB or something?


Thanks
 

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Channel Hopper

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That looks like one of the later Inmarsat telephone systems.

Normally the receiver on the system will have the beacon frequency of the satellite required and the dish will be peaked on that signal. It is only when the best downlink signal is received that the uplink will be enabled to carry out two way communication.

Owing to the nature of the differing satellite crosslinks (many of which will be opposite polarity for downlink/uplink, but there are circular polarised and even colinear systems ) and the risk of movement, it is not usually recommended to substitute equipment on the front end following set up
 
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