Originally Posted by Sephiroth
That means the amplifier is out of slope - but not so as to worry. The SNR is poor though although not far from being in the optimum range.
The SH in modem mode would eliminate the VMNG300 being on the way out.
I'm not sure it's the amp characteristics. Here are my five down stream...
Locked 140 290750000 Hz QAM256 3.8 dBmV 43.2 dB 4730 25
Locked 141 298750000 Hz QAM256 3.9 dBmV 43.2 dB 4548 12
Locked 142 306750000 Hz QAM256 3.8 dBmV 43.2 dB 4513 11
Locked 143 314750000 Hz QAM256 3.7 dBmV 43.2 dB 4625 17
Locked 144 322750000 Hz QAM256 4.2 dBmV 43.9 dB 1304 0
The first four were the originals and the fifth was added about 4 months ago. This has about 0.5dB higher amplitude and 0.7dB better SNR.
My guess is that this fifth channel is provisioned from a different line card in the CMTS.