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LTC5586 Baseband (IF) bandwidth

Question asked by deepu on Apr 4, 2018

In LTC5586 datasheet, We have graph stated as Gain vs IF Frequency for Various Fixed LO Frequencies(page 7, 6th graph). We couldn't understand the meaning of this graph. Please help us out in understanding this graph. Also datsheet say's 1dB Baseband BW is 1GHz.But as per this graph at 1GHz, IF gain drops by -10dB. Please clarify.