interpretation graph1

[g.visser3@upcmail.nl]

hallo everybody,
using stublervista
I do'nt understand the figures like 99% and -30DB.
Another ap produces 11% and -88dB.
Where can i find an explanation of these figures.
regards gerard

[ACalcutt]

0% - 24% - Low signal, probably not connectible
25% - 49% - OK signal
50% - 74% - Good signal
75% - 100% - Excellent signal (note: sometimes netsh will report a signal that is really low as 99%. usually this happens if you are connected to an access point)

[g.visser3@upcmail.nl]

Nice to react on my question.
Thats not what i wanted to know. I'am curious to know what 100% means in relation to a/the wireless router. Produces another router a lower/higher receiving signal on my stumbler graph?.
Further what means -30dB. Has this any relation to the incoming signal. So yes what are/produces the standards.
viervorst

[pferland]

The '100%' is exactly how Andrew explained it, it is the strength of the Wireless signal that is reaching your laptop from the respective Access Point (Wireless router), it also sounds like you are wanting multiple Access points to be plotted on one graph is this true?

'-30db' is just the Decibel conversion of the percentage that netsh in windows reports. the formula that was used is:

Code: Select all

-70 + (20 * Log10(Signal / (100 - Signal)))

-Phil

[ACalcutt]

'-30db' is just the Decibel conversion of the percentage that netsh in windows reports. the formula that was used is:

Code: Select all

-70 + (20 * Log10(Signal / (100 - Signal)))

Just a note on this conversion from signal % to signal in db. It is very much an estimate since I have no idea what microsoft bases the % value off of. The formula used is basically made up (based on some formulas I found). The current formula is the closest I came to giving results that matched what netstumbler was giving as a result. It is very much a formula based on trial and error.

If anyone ever has a better formula, definitely let me know