Bad CCQ @ Bad SNR

Hi!

I have problems with a 16km WLAN link.

I use a RB433 and R52N-m cards on both sides.
The frequency is set to 5500MHz.

The SNR changes between 45 and 50dB.

Although i have such a good SNR the CCQ changes between 20% and 100%.

I also have many other WLAN links made up by mikrotik.
But this link is the only which makes problems.

AP Config:
name=“wlan3” mtu=1500 mac-address=00:0C:42:64:BB:7D arp=enabled interface-type=Atheros 11N mode=ap-bridge ssid=“HENNpHOCHp02” frequency=5500
band=5ghz-a/n scan-list=default wds-mode=static wds-default-bridge=none wds-ignore-ssid=no default-authentication=yes default-forwarding=yes
default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no security-profile=default compression=no

Client Config:
name=“wlan3” mtu=1500 mac-address=00:0C:42:64:BB:99 arp=enabled
interface-type=Atheros 11N mode=station-wds ssid=“HENNpHOCHp02”
frequency=5500 band=5ghz-a/n scan-list=default wds-mode=static
wds-default-bridge=none wds-ignore-ssid=no default-authentication=yes
default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0
hide-ssid=no security-profile=default compression=no

Maybe some settings are false configured.

Which settings at the HT bar are the best?

Thanks a lot.

The topic should mean Bad CCQ @ good SNR

The FW is on both sides 4.9.