I am having big problems with R52H. They failed on me on 3 out of 7 times.

Description of my problem:
setup: all left at default, including output power...

It works great for two weeks up to one month and then drops down to half of its output strength. For example, scanning with ovislink 5460ap gives RSSI 42 when card is ok, but when card fails RSSI drops to 22. So far 3 cards did this to me, on different access points. 3 out of 7 is almost 50% failings.

My question would be: what is the best setup for R52H in order to have it running without failures?

Thank you

1) Do you use antenna ?
2) Do you use proper grounding for antenna and kit ?

Yes, i use antenna, and yes, i use grounding...

From what I have read in this forum I think that R52H is a joke on our money. Use R52 instead.

I am using r52h because it has good output power, next card in that price range is compex 200 mw, but it has almost twice lower output power...