said by kmand:More than 10 years ago when all I had was a TV, there was a TNB6-40P8/10 (an upstream noise filter) standard on each output of the outdoor distribution box that the Cable company used to feed my Condo (a multi apt building).
When I got my cable modem, the technician split the feed in my unit and moved the filter indoors to the TV side.
A lot has changed in 10 years. The Cable company has changed hands a few times and is now Comcast, and a lot of engineering changes have been made in the system. On the TV side of my split I added a bidirectional amplifier since I now have a lot of active taps including some bidirectional cable boxes and the signal level was too low with all the splitting. The filter sits right at the first split before the amplifier.
I don't know if the filter was ever needed, and if its helping or hurting anything now. I'm inclined to remove it just to have one less item in line with what is already too many items on one side of the split. I guess in theory an upstream filter shouldn't cause any loss on the downstream side, but thats in theory. Is removing it a bad idea?
Also, if Comcast/Tivo ever gets to my area won't this filter kill the DOCSIS return channel that the Comcast/Tivo/Motorola boxes use? The Motorola box doesn't use the built in Docsis modem with the legacy DVR software.
