Ch95 spans 90 - 96 MHz
Ch96 spans 96 - 102 MHz
CH97 spans 102 - 108 MHz
It was easy to identify years ago when the analog TV audio could be heard at 95.75, 101.75 and 107.75 MHz, but now that they are all QAM/digital you just get solid hash for each 6 MHz span.
Aside from this... The big culprit in my house was *one* crappy Ethernet cable (out of 16 total) running for a mere 6' between my cable modem and a WiFi access point. The first thing I did was start shutting off circuits throughout the whole house... Noise still there! D'Oh. Must be the network and/or computer I have on a UPS. Powered off the cable modem and the noise vanished. But, it wasn't the modem itself, it was that one cable.
Gigabit I/O over twisted-pair cable covers up to right around 100 MHz, maybe a little higher or lower depending on how noisy the hardware is at each end. In my case everything below approximately 95 MHz was getting a strong hash thrown over it.
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