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Úvod > Diskuse > Technické otázky > divny signal u ADSL?

divny signal u ADSL?

radek (23.10.2005 11:31:21)

Trochu jsem se vrtal v diagostice modemu a u upstream noise margin mi to pise: relative capacity occupation: 0% noise margin upstream: 28 db output power downstream: 19 db attenuation upstream: 17 db tone 0- 31: 00000000000000000000000000000000 tone 32- 63: 00000000000000000000000000000000 tone 64- 95: 00000000000000000000000000000000 tone 96-127: 00000000000000000000000000000000 tone 128-159: 00000000000000000000000000000000 tone 160-191: 00000000000000000000000000000000 tone 192-223: 00000000000000000000000000000000 tone 224-255: 00000000000000000000000000000000 u downstream noise margin mi to pise: relative capacity occupation: 0% noise margin downstream: 24 db output power upstream: 12 db attenuation downstream: 32 db tone 0- 31: 00000000000000000000000000000000 tone 32- 63: 00000000000000000000000000000002 tone 64- 95: 23445555667777888888888888888888 tone 96-127: 08888887777777777666666666666666 tone 128-159: 66666666665555555655356666666666 tone 160-191: 66666666666655555556566666666666 tone 192-223: 66666666666666666666666666666666 tone 224-255: 65555555555555555555553555544332 Docela mne zarazi ze u upstreamu jsou u tone same nuly a u downtreamu ruzna cisla. Mam zapojeny pouze jeden telefon a ten je az za splitterem. V telefonu slysim slabe praskani. Jsou ty hodnoty v normalu? Muze to odkazovat na utlum signalu?

Anonym (23.10.2005 12:13:24)

MARGIN - Signal to Noise (SNR): 5db or below =bad, no sync/intermittent sync 8db-13db = average - and no sync issues 14db-22db = very good 23db-28db = excellent 29db-35db = rare, can throw a rock at co/remote UTLUM - Line attenuation teens = rare, great copper lines, close to C.O./Remote 20-30 = excellent 30-40 = very good 40-60 = average 60-65 = poor 65 and above will have issues