Motorola Surfboard signal level check

[lowteckh]

Online light has been blinking/cycling for the entire day = no net. Modem is a comcast rental.

Signal values:
downstream
frequency 567000....0 Hz
signal to noise 35 dB
power level 9 dBmV

upstream
channel id 0
frequency 0 Hz
ranging service id 0
symbol rate 0.000 Msym/s
power level 8 dBmV

... Now the online light is solid but 3rd light is blinking still no net
upstream
channel id 3
frequency 370.....0 Hz
power level 50 dBmV

 

[mattjw916]

You pay them for the service right? Have them send a tech and find the problem...

Make sure you aren't running through any splitters for your connection to the cable modem as it degrades the signal.

Renting a modem from Comcast is a rip-off btw.

 

[PanzerBoxb]

IIRC, that power level is a bit on the "hot" side. The nominal range should be +5dB to -10dB.

mattjw916 is correct, get Comcast to fix it.

 

[keenan]

Looks like an upstream problem, the downstream signal is strong and the SNR is good. Aside from reconfiguring your wiring there's not much you can do, get them to roll a truck.

And +1 on renting being a waste of money, the SB5101 is like $25 on eBay.