If the earth station downlink signal received is at fs = 4.08 GHz, what first stage local-oscillator frequency fLO is needed to achieve IF of 770 MHz?(a) 3310 MHz(b) 4080 MHz(c) 1203 MHz(d) 3250 MHzThis question was addressed to me at a job interview.The query is from Ground Stations topic in division Satellite Communication of Avionics

If the earth station downlink signal received is at fs = 4.08 GHz, wha

1.	If the earth station downlink signal received is at fs = 4.08 GHz, what first stage local-oscillator frequency fLO is needed to achieve IF of 770 MHz?(a) 3310 MHz(b) 4080 MHz(c) 1203 MHz(d) 3250 MHzThis question was addressed to me at a job interview.The query is from Ground Stations topic in division Satellite Communication of Avionics
Answer» RIGHT ANSWER is (a) 3310 MHz To EXPLAIN: FIF = fs – fLO fLO = fs – fIF = 4080 – 770 = 3310 MHz.

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