wireshark - What is RSSI value in 802.11 packet -

wireshark - What is RSSI value in 802.11 packet -

i see 2 values of ssi signal in 802.11 packet when viewed in wireshark. tot know 1 value right rssi value

information wireshark:

ssi signal: -40 dbm ssi noise: -100 dbm signal quality: 64 antenna: 0 ssi signal: 60 db

also note ssi signal(second time) ((ssi signal) - (ssi noise))

i confused 1 correct. wikipedia entry tells these implementation can vendor dependent. totally confused right value.

i see 2 values of ssi signal in 802.11 packet when viewed in wireshark

it sounds if driver 802.11 adapter used capture packet beingness weird , supplying both antenna signal strength in dbm , antenna strength in db. type of adapter that, , operating scheme machine on machine did capture running?

"dbm", link above indicates, decibels 1 milliwatt of power; "db", other link above indicates, decibels unspecified arbitrary point. dbm tells actual signal powerfulness @ antenna; db doesn't - can utilize db values compare other db values.

neither of "rssi" defined 802.11; rssi value arbitrary, it's more arbitrary - 802.11 doesn't measures, larger values correspond stronger signals, , values are vendor-dependent.

also note ssi signal(second time) ((ssi signal) - (ssi noise))

the author of driver adapter might not have read radiotap page "db antenna signal" value (linked above), , might have thought supposed signal-to-noise ratio, , calculated subtracting noise value signal value (decibels logarithmic scale, , quotient of 2 values difference between logarithms of values). ignore value, , utilize "ssi signal" indication of signal strength in milliwatts (-40 dbm = 100 nanowatts, @ to the lowest degree per table in the wikipedia article on dbm).

wireshark 802.11