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what is the difference between high and low freguencies?
and why we use high freguency for up link and low freguency for down link in satcom??
Added after 18 minutes:
i need someone help me
why we use mixer ,rf amp,if amp,in earth station receiver???
and what is the meaning of carrier freguecy??
also, please give me practical examples on digtal and analog signals ??(the difference between them??
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