Question about CCQ and more

I have couple of questions about wireless links:

  • What’s the difference between Signal To Noise and CCQ as far as quality of link is concerned? Which one is more imporatant and has a bigger impact on transfer rates.

  • What’s the relation between Signal Strength and CCQ ? For example I have a 5GHz link with parameteres :
    Signal Strength : -63 dBm
    Tx Signal Strength: -63 dBm
    Tx/Rx CCQ: 60/90%
    How can I have the same Tx and RX Signal Strengths and different CCQs?

  • On some links SignalToNoise shows constantly 0 dBm , why is that?

  • Tx and Rx Rate constantly changes (ie 54, 48,36,48,and so on) when data rate is set default. Is it a good idea to lock data rate ? Is it better to choose one rate or range of rates ?

  • Do you guys have any experience with AP-StationPseudobridge mode in PtP adn PtMP configuration? What about VLANs on such links?

Thanks in advance