We are going to use AD8367 in a system which RF Bandwith is 350MHZ /-50MHZ or 140MHZ/-50MHZ, QAM1024. I am just wondering is the ad8367 suitable for high order modulation signal?
I'm guessing your carrier is at 350 MHz and 140 MHz and the signal bandwidth is 50 MHz?
If this is the case, you will not need to DC couple at all. And if you are worried about the coupling cap corrupting the data, use a 1 uF to push the high pass corner as low in frequency as possible.
The AD8367 should be OK with QAM1024.
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