951G-2HnD Wireless Speed problem (<5 Mbps)

RouterOS Wireless Networking
1

Hello!
We have 951G-2HnD routerboard with OS 6.32.1. We have problem with Wifi speed, we can’t get it higer than 5 Mbps. Where cloud be the problem? We have tried many settings from many posts like:
http://forum.mikrotik.com/t/problem-with-wireless-n-speed/51282/1
http://mybroadband.co.za/vb/showthread.php/553691-Mikrotik-RB751-Wifi-problems
http://serverfault.com/questions/696019/mikrotik-rb951g-2hnd-wi-fi-drops-or-hangs-connections

But nothing help.
Our settings:
MTU 1500
Band 2GHz-B/G/N
Channel 20/40MHZ eC
Tx and Rx chains: chain0 and chan1
Frequency Mode manual-txpower
Frequency auto

2

Distance? Receiver signal?

How much TX power?

Run a spectral scan (/interface wireless spectral-history 0 range 2412-2472

Maybe you have strong interference, and 40MHz channel doesn’t help…

3

Try:

Channel 20 Mhz only !
DIstance: Indoors

and see the difference.

4

TX Power Mode is set to default.
The most clean frequency is 2422, this value is the best.

5

We set Channel to 20 MHz only and distance: indoors, but nothing better, the same max about 5 mbps.

6

What is your wireless client and what test you use to get measure only 5mbps?
Are you using Wireless encryption? If yes, is it AES or TKIP?

7

Have you tried to set manual tx power to about 20dbm?

Regareds

8

Try to restart to default configuration, and see if problem persist..

9

I use Netinstall, NAND repair and reset all settings, also - system package enable wireless-cm2. Now speed is about 100Mbps and router are much stable. Continue monitoring.