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Digital Lifestyle
Internet, Networking, and Wireless
Wifi signal strength indicator
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<blockquote data-quote="RadDave" data-source="post: 1563974" data-attributes="member: 234411"><p>Hi <strong>Pendlewitch</strong> - thanks for the posts; I knew a little about RSSI (Received Signal Strength Indicator) but just started to look at my own laptop; from my understanding, <em>dBm</em> is a decibel power ratio referenced to 1 mWatt, i.e. 0 dBm = 1.0 mW, so that the negative numbers indicated signal strengths below that level (and of course these are logarithmic, so a 3 dB change is a doubling or halving of the signal power). Thus, for signal strength the better values approach 0, while for noise, values heading toward -100 are desirable for a better S/N difference.</p><p></p><p>SO, I'm getting about -62 RSSI in my den (one room away from my router); next to the router, -42, i.e. 100x the signal power which is quite an increase; my Signal/Noise numbers are -68 dBm/-88 dBm, thus a 20 difference - probably OK but not great - would of course be much better near the router.</p><p></p><p>Now for those going through this same analysis, the quoted listing below (from <a href="http://www.wireless-nets.com/resources/tutorials/define_SNR_values.html" target="_blank">HERE</a>) might be of use. I'm in the middle in my den, so distance from my router (which is an AirPort Extreme on 802.11n) and likely RF interference accounts for the difference. But hope this helps others better understand these acronyms - Dave <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="RadDave, post: 1563974, member: 234411"] Hi [B]Pendlewitch[/B] - thanks for the posts; I knew a little about RSSI (Received Signal Strength Indicator) but just started to look at my own laptop; from my understanding, [I]dBm[/I] is a decibel power ratio referenced to 1 mWatt, i.e. 0 dBm = 1.0 mW, so that the negative numbers indicated signal strengths below that level (and of course these are logarithmic, so a 3 dB change is a doubling or halving of the signal power). Thus, for signal strength the better values approach 0, while for noise, values heading toward -100 are desirable for a better S/N difference. SO, I'm getting about -62 RSSI in my den (one room away from my router); next to the router, -42, i.e. 100x the signal power which is quite an increase; my Signal/Noise numbers are -68 dBm/-88 dBm, thus a 20 difference - probably OK but not great - would of course be much better near the router. Now for those going through this same analysis, the quoted listing below (from [URL="http://www.wireless-nets.com/resources/tutorials/define_SNR_values.html"]HERE[/URL]) might be of use. I'm in the middle in my den, so distance from my router (which is an AirPort Extreme on 802.11n) and likely RF interference accounts for the difference. But hope this helps others better understand these acronyms - Dave :) [/QUOTE]
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