Tx CCQ

RouterOS General
1

Hi all.

Please take a look at 2 sites ive set up to an AP. They seem to be getting quality signal, but the TX CCQ is quite low. might this be to do with the type of antenna or wireless card I am using?

thanks in advance.
nv2.png

2

what is the APs band A or A/N?
Maybe you are not pushing much traffic through that link or it has some retransmissions.

3

Hi Uldis.

Here are the settings of my AP

 /interface wireless> pri
Flags: X - disabled, R - running 
 0  R name="wlan1" mtu=1500 mac-address=00:XX:XX:32:33:XX arp=enabled 
      interface-type=Atheros AR5413 mode=ap-bridge ssid="....." frequency=2402 
      band=2ghz-b/g channel-width=20mhz scan-list=default 
      wireless-protocol=nv2 antenna-mode=ant-a wds-mode=disabled 
      wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled 
      default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 
      default-client-tx-limit=0 hide-ssid=no security-profile=.... 
      compression=no

I edited sensitive info. I have set up the link just to test before installing at the customer so there is no traffic transversing it at the moment. Links have solid uptime, or is that not what you meant by retransmissions.

The cards cant run on N. I feared I would have to change the wireless cards. :frowning:

4

it might be interference at rx or tx site. Do you have more radios there? If yes, disable the radios for a couple a minutes.

5

CCQ is only calculated properly when there is traffic on the link. If there is no traffic, CCQ can be that low. Put some traffic on the link, and you will see CCQ go up.

6

Thanks everyone for the input.

To answer a few questions. I did bandiwdth tests from RB to RB and i had no increase in Tx CCQ at any stage. It stayed around 20% max. I also turned off the other radios in the area and it did improve but max was 2mbps and still fluctuating. There are plenty more radios in the area but dont belong to me; so that would make 2.4 out of the question.

I have since tried to change from Dbii cards to R52HN and noticed a significant drop in signal values (attached). Could this just be because of the mili watts of the card?

I tried the following settings on the RBs. HT Tx Chain / Rx Chain on 0, 1 and both. I tried using 20/40 HT above. I tried using N only. I could get nothing to perform as well as the Dbii with nv2 as the only real setting change. ANY attempt on 802.11 would result in constant disconnections.

If anyone has some pearls of wisdom, please share. Otherwise I am going to have to relocate or install some on the A band.

Regards.
chain 0.png