Jump to content

Modem sila signalu


Recommended Posts

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 ?

Link to post
Share on other sites

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)

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...