I have strange problems with version 5.0RC(X). Chain-0 is working good, but when I connect antenna to Chain-1, there is very poor signal.
Here is one image from my dual link. I have water issues on chain-0, so I tried to remove it and leave only chain-1 to work. I disabled chain-0 on both sides, but there was no connection. I tried all combinations but with no success. When I enable only chain-0, which have very poor signal, then link manage to connect. What's wrong with using only chain-1.
This sample is not only one in my network. When I moved pigtails from chain-1 to chain-0 (single antenna on both sides) signal and CCQ improved and link was usable. When link was connected to chain-1, signal was 30% lower and troughput was about 1Mb (megabit), and CCQ was terrible.

Is there a difference in using cahin-0 or chain-1???

All cards are R52N-M or R52Hn. On this dual link, which is on picture, cards are R52Hn and I'm using dual polarity antennas.

you can check this as usual wireless link, each chain seperately, and then check how they work together if 11n is enabled. Most probably, there is some interference or hardware is damaged (connectors, cables)

Hello,
chain-1 is optional chain and the link can't work without chain-0. You always need
to be using the chain0 if you want to use chain-1 as well. Note that you should
always have antenna connected to the antenna port(chain) if you do not want to
damage the power amplifier of the wireless card.

you have to use chain-0 RX at all times, chain-1 is optional

you have to use chain-0 RX at all times, chain-1 is optional

you have to use chain-0 RX at all times, chain-1 is optional

So connected chain-0 and using chain-1 alone does not work/gives bad signal?

Not connecting chain-0 would damage the card even when only RX at chain-0?

Using a V+H Antenna connected chain-0=V-Pol chain-1=H-Pol I cant operate
at H-Pol only. I get interference from V-Pol as I have to use chain-0 RX ?

you have to use chain-0 RX at all times, chain-1 is optional

So connected chain-0 and using chain-1 alone does not work/gives bad signal?

Not connecting chain-0 would damage the card even when only RX at chain-0?

Using a V+H Antenna connected chain-0=V-Pol chain-1=H-Pol I cant operate
at H-Pol only. I get interference from V-Pol as I have to use chain-0 RX ?

If you have connected both chain0 and chain1 to antennas and want to use chain1 then you need to enable the chain0 as well or the chain1 will not work correctly (bad signal, no connection).
如果你有使chain-0和没有连接ed any antenna you could damage the power amp.

In your case you should use chain-0 to RX and the chain-1 to Tx/RX or just switch the antenna connectors to have H-pol to chain0.