The difference between the strength of the signal and quality?

Hi all

According to the Cisco documentation

Low RF signal strength does not mean the lack of communication.

The quality of the signal is low means poor communications.

If someone can explain to me the difference between the power of the signal and the quality of the signal?

In accordance with my AP home I see that this signal strength is measured in numbers like 50% or 100%.

But what is the quality of the signal and how to measure me?

Thank you

Mahesh

Big question...

First, let's look at the notion of signal quality and strength... Suppose for a minute you're front row at a rock concert right next to the speakers. Sound is loud, you can't hear anything else that scream. It is an example of a strong signal but poor quality.

As for the signal and the noise of measurement or should we say quality of signal. Providers sometimes give you a % or dB scale when ranking signal. You can't really do headers or tails of the % scale because each vendor has % different measures. But check your access point, because you will be able to change in dB.

Look at dBm. At the moment my client shows:

Signal - 59 dBm

Noise - 98 dBm

The dB scale is simple. More PB the STRONGEST signal. You'll see - 59 of the signal is good, in fact, I'm about 50 feet from the AP. If you are under the ap you will get as a - 30ish. Noise, we do not want to be noisy, if we want to see the noise to-100. More low is the dB of noise as loud noise.

So we're back out the example above. Next to the speaker, you're showing tell - 30dBm, but your noise can be as - 70dBm...

Does make sense?

Normally, you want to see your signal not exceeding 67 - not for voice or - 76 for the data. And your noise should be greater than-90.

Tags: Cisco Wireless

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