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what is the appropriate Gain index for the best Rx sensitivity at 5GHz band

Question asked by hguo@gemtorch.com on Apr 23, 2015
Latest reply on Apr 23, 2015 by tlili

According to the AD9361 Noise Figure vs. Gain Index Plots, the NF will decrease along with the Gain index increased. if this mean I should always use the possible maximum Gain index (not more than the ADC maximum input) to reach the best Rx sensitivity?

 

But another consideration, the noise will increase along with the Gain index increased. If the input signal of 9361 is same, etc the same SNR_in, augment of the gain of 9361 will deteriorate the SNR_out, which will deteriorate the 9361 Rx sensitivity, so what should I do?

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