You can view your signal levels using the cable modem's web interface. You should see readings like this
Receive/Downstream: -15dbmV to +15dbmV
Transmit/Upstream: 30dbmV to 55dbmV
Signal to Noise Ratio (SNR): 30dB or Greater
If your signals are out of spec, you may experience packet loss or retransmissions. Either can lead to slow speeds.
Feedback received on this FAQ entry:
- http://www.dslreports.com/forum/r29286835- says this information is outdated due to lack of DOCSIS 3.
2014-06-01 13:40:21 (antdude )
- According to the TW tech I just spoke with, acceptable downstream power levels are -9dBmV to +9dBmV. I am having problems with my digital phone service and the tech said my downstream power was +12dBmV and that was +3dBmV over max so he scheduled a truck to come out and see what's causing the excess power level.
2009-03-25 07:20:23 (socalblitz )
by drake edited by big greg
last modified: 2005-08-01 08:22:05