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To see how well your 91XG is doing, try the attenuator test in its coax line between the amp and the input of the AC7. Add enough attenuation to bring the SNR down to 16 dB. This tells you how much "fade margin" you have at that location to deal with changes in signal strength.
I did that test tonight. The answer to that question is 21 or 22 dB. 20dB attenuation gives an SNR of 18 dB. 23dB attenuation gives an SNR of 15 dB.
So what does this mean? How "well" is the 91XG doing?
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