[Wi-Fi] What is "Signal" measured with?

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[Wi-Fi] What is "Signal" measured with?

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
[Wi-Fi] What is "Signal" measured with?
[Wi-Fi] What is "Signal" measured with?
2017-06-27 22:19:40
Model : WR841N

Hardware Version : WR841N v12 00000000

Firmware Version : 3.16.9 Build 160624 Rel.44986n

ISP : Not
relevant

Control panel: menu Wireless -> Wireless Settings, with WDS Bridging enabled, click on Survey to show other APs in another page.

This is what i see:




Ok, so station 1 has a Signal of 80 dB... What is "Signal"?
Signal strength? Nope, signal strength is a negative quantity and is expressed in dBm.
SNR? Nope, SNR of 80 dB is too high to be true.
Signal quality (in percentage)? Likely, but then why using the dB measurement unit?

It would be a lot better if the following quantities were shown in the first place, to avoid confusion:
Strength, noise, SNR, quality%

I hope you might shed some light on this issue, thanks in advance.
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Re:[Wi-Fi] What is "Signal" measured with?
2017-07-14 03:49:25
For anyone who might be interested I e-mailed TP-Link support, and their answer about the topic was that the Signal parameter is equal to the sum between RSSI value of wireless signal and 128dBm.
So a value of 80dB corresponds to a RSSI equal to S - 128 = 80 - 128 = -48dBm

In formulas:
S [dB] = RSSI + 128
RSSI [dBm] = S - 128
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Re:[Wi-Fi] What is "Signal" measured with?
2017-07-14 09:32:08
nice post!
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Re:[Wi-Fi] What is "Signal" measured with?
2020-05-05 20:24:24 - last edited 2020-05-05 20:28:44

 

So... my situation is my signal is 42db... so I deduct 128 to get the dBm  of -86dBm is that correct ?

 

Curious what level of fade margin would be required to deal with fog & rain ?  I generally would want something on the order of -70dBm but that seems impossible to achieve... my distance is 750 feet, am using a 24dBi dish on AP and duckie's on the client.

 

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