Cable Modem Help

[Padilla]

Cable Signal Details

Forward Path: Return Path:
Signal Acquired at 561.000 MHz Connection: Acquired
SNR: 38.3 dB F requency: 26.5 MHz
Received Signal Strength: -8.9 dBmV Power Level: 48.0 dBmV
Bit Error Rate: 0.000 % Channel ID: 3
Modulation: 256 QAM Modulation: QPSK

The results I got above, are from cable modem diagnostics that I ran, because I feel I am having some issues with (stable) connection speeds. is my SNR too high? or is my RSS too high or too low ?.

I have roadrunner (cable) internet.
5Mbit Down
384Kbps Up
Modem : RCA DCM425

could someone help me if those levels arent optimum , on how I would go about correcting the problem. thank you

 

[y0giboy]

There is no such thing as too high an SNR-- =]

Most cable plants try to keep the forward path/downstream SNR you see there at 30dB or higher. Anything at 27dB or lower and you may start experiencing poor service due to packet loss or latency. Your SNR looks great!

The RSS or Downstream Rx Power level should be between -15 and +15. However, optimal is as close to 0 as possible. The more you swing in either direction the more your bandwidth is affected.

Your Upstream or transmit power level there is at 48. Specifications call for a level of 30-50. I've seen lower than 30 with no problems. When you start getting around 55 and higher you start seeing intermittent connectivity due to the modem exceeding its maximum power output (in your RCA modem's case this would be 58dBmV)

To optimize your RSS you should have the modem behind as few splitters as possible and have the cable connecting to the modem as short as possible to minimize attenuation. This would help strengthen your downstream hopefully closer to 0dBmV.

Anything further would have to be troubleshot by the ISP and possibly you would need a field tech sent out.

-JSKing

>Cable Signal Details
>
>Forward Path: Return Path:
>Signal Acquired at 561.000 MHz Connection: Acquired
>SNR: 38.3 dB F requency: 26.5 MHz
>Received Signal Strength: -8.9 dBmV Power Level: 48.0 dBmV
>Bit Error Rate: 0.000 % Channel ID: 3
>Modulation: 256 QAM Modulation: QPSK
>
>The results I got above, are from cable modem diagnostics that I ran, because >I feel I am having some issues with (stable) connection speeds. is my SNR too >high? or is my RSS too high or too low ?.
>
>I have roadrunner (cable) internet.
>5Mbit Down
>384Kbps Up
>Modem : RCA DCM425