Unstable signal ...

RouterOS Wireless Networking
1

Hi everyone…i just bought 2 RB333 and installed them on my backbone link…but here is the deal.

Signal levels: tx-rate: “24Mbps”
rx-rate: “48Mbps”
signal-strength: -57dBm
tx-signal-strength: -49dBm
5km distance. Clear line of sight.
bandwith test shows 10mbits one way and 16mbits other. This is fine with me, BUT…
When i put my clients online and they start transferring data…it starts at 700-800kb/s and even more and after 2 seconds…the speed drops down and down and reaches 250kb/s. Then I looked at the signal levels and…:

tx-rate: “6Mbps”
rx-rate: “6Mbps”
signal-strength: -56dBm
tx-signal-strength: -48dBm
noise-floor: -105dBm
signal-to-noise: 49dB
tx-ccq: 30%
rx-ccq: 24%

As you can see the tx-rate and rx-rate drops at 6 mbits.

1 of my cards power is 50mlw and other is 350mlw. Is that a problem?
Do i have to enable anything on the boards. What is nstream exactly for? Do i have to enable it?

My antennas are California type at one end and 90cm Dish at the other.
Cables are fine..i used RB133 until now and reached 600kb/s bandwith.

Thanks in advance.

Regards, Ventsi.

2

Use the same hardware at both sites. Nstreme is good. You may want to enable Turbo and Compression.

3

ok…i will buy the same card theese days. I want to know is this the reason to drop the speed down. what exactly nstream does? do i have to enable copmpression on both sides?

thanks in advance
Regards Ventsi

4

Use search for Nstreme. Compresion will work only if on both sides is activated.

5

Make sure your antenna’s are both in the same polarization. With clear LOS and the short distance your CCQ’s should be much much higher.

-Gerard

6

You need a higher CCQ. What is your noise floor reading on both sides? Sounds like an interference problem.

7

Agree, CCQ must be at least 80% for you to make it stable for connection.
:sunglasses:

8

Goes without saying. With nstream disabled your wireless links are working with standard 802.11 protocols, which are not designed to work well with anything more than a few hundred meters.

enabling nstream may not be the solution to your problems, but enabling it should be your first step.

Regards
A