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News : uglystupid2 Don't look stupid, make sure you keep up-to-date with our rules, please read rules, click here  police September 06, 2008, 09:43:52 PM
testmy.net Broadband  |  Main Forum  |  HELP!  |  Topic: Whats normal dBmV for a cable modem? Advanced search
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Topic: Whats normal dBmV for a cable modem?  (Read 1422 times)
Philly
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« on: March 01, 2008, 01:24:42 PM »
My line quality is pretty horrid, pings jumping and ranging so I went into the modem page: 192.168.100.1 and I see that my transmit power is 46dBmV and my Receive power is -8.3dBmV is this normal, I had a 15/1 connection in new york that had a 35dBmV transmit and was just wondering since this is a lower internet connection 5/512

Just wondering... Smile
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« Reply #1 on: March 01, 2008, 03:24:51 PM »
 Not sure, you have me curiouse enough to look into it further.
Here's a comparison for you, I have 15/7, from TWC.

Downstream Power     -7.2 dBmV

Upstream Power     46.8 dBmV

 Look into the splitter, and cables, as well as the ends, make sure they are in good condition. From what I read, this plays a big part.
« Last Edit: March 01, 2008, 03:32:46 PM by mudmanc4 » Logged
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« Reply #2 on: March 01, 2008, 04:40:07 PM »
Downstream Power: good +10 to -10, best being 0

Upstream Power: 0 - 50+, higher the better


Edit: these are mine.

Downstream
    Freq/Power:    681.000 MHz    5 dBmV    
    Signal to Noise Ratio:     36 dB    
    Modulation:   QAM256   
Upstream
    Freq/Power:   36.000 MHz    28 dBmV    
     Channel Type:    DOCSIS 1.x (TDMA)   
     Symbol Rate:    2560 kSym/sec   
     Modulation:    QAM16
« Last Edit: March 01, 2008, 04:52:54 PM by Coknuck » Logged
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« Reply #3 on: March 12, 2008, 05:24:08 PM »
Downstream
    Freq/Power:    579.000 MHz    -3 dBmV    
    Signal to Noise Ratio:     35 dB    
    Modulation:   QAM256   
Upstream
    Freq/Power:   34.000 MHz    46 dBmV    
     Channel Type:    DOCSIS 1.x (TDMA)   
     Symbol Rate:    2560 kSym/sec   
     Modulation:    QAM16
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« Reply #4 on: March 12, 2008, 09:07:39 PM »
Downstream
  Freq/Power: 543.000 MHz  14 dBmV   
  Signal to Noise Ratio:   37 dB   
  Modulation: QAM256   

--------------------------------------------------------------------------------
Upstream
  Freq/Power: 35.000 MHz  37 dBmV   
  Channel Type: DOCSIS 1.x (TDMA)   

  Symbol Rate: 2560 kSym/sec   

  Modulation: QPSK



downstream--- should i get my lines checked out?
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« Reply #5 on: March 13, 2008, 03:55:22 AM »
Quote from: TimPawlak on March 12, 2008, 09:07:39 PM
Downstream
  Freq/Power: 543.000 MHz  14 dBmV   
  Signal to Noise Ratio:   37 dB  
  Modulation: QAM256  

--------------------------------------------------------------------------------
Upstream
  Freq/Power: 35.000 MHz  37 dBmV  
  Channel Type: DOCSIS 1.x (TDMA)  

  Symbol Rate: 2560 kSym/sec  

  Modulation: QPSK



downstream--- should i get my lines checked out?
I did some checking and it seems as if for fios, anywhere from 0 +/- 15 is good, besides, look @ your speeds, outta site!   

 That is fios right?
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