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Modem sila signalu

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Mam modem Scientific Atlanta EPC2203. V jakych mezich se ma pohybovat sila signalu ?


Ja mam :


Downstream Channel :

Power Level : -7 dBmV Signal to Noise Ratio : 38 dBmV


Upstream Channel :

Power Level : 47 dBmV


Jeste mam dotaz, jake ed3 modemy ted dava upc s podporou telefonu ?

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Tak uz jsem se k necemu doklikal :-)


Downstream Value

Frequency 386000000 Hz Locked - Frekvence kanalu pro prijem, tzn 360 Mhz (je to v postate stejne jako u TV kanalu - šířka jednoho kanalu je 8 Mhz)

Signal to Noise Ratio 35 dB - Odstup signalu od šumu (neměl by klesnout zhruba pod 30 dB)

Power Level -1 dBmV - Úroveň příjimaneho signalu (mela byse pohybovat v rozmezi -15 az +15 dBmV)


Upstream Value

Channel ID 2 - cislo kanalu pro odesilání (pro upload se mezi modemem a CMTS pouzivaji 4 kanaly)

Frequency 22800000 Hz Ranged - Frekvence kanalu pro odesilání tzn. 22,8 MHz (šířka kanálu je 1,6 MHz - muze byt az 3,2 MHz)

Power Level 53 dBmV - Úroveň odesílaného kanalu (mel by se pohybovat zhruba nekde mezi 25 - 58 dBmV)

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