[mythtv-users] Semi-OT: OTA, Comcast business HSI and the single coax

[Allen Edwards]

Brian Wood wrote:

>> You want to connect your OTA antenna to your cable??  That probably won't
>> work very well.  The Cable already has signals on the same frequencies as
>> most of the OTA channels and will swamp them out.
> 
> DO NOT DO THIS! It will result in your transmitting cable channels over the 
> air. Some of the cable channels use frequencies not used for broadcast, such 
> as aeronautical navigation channels. You really don't want a 747 in your 
> backyard.

So, in addition to the amplifier I suggested in the antenna line, which 
should not let the signal go back out the antenna, put a bandpass filter 
in this line.
https://www.tselectronic.com/chanplus/lpf.html

So, just to be clear.  From the antanna go through an RF amplifer then 
into the filter above, then to a 2-way splitter.  The output of the 
splitter goes to your cable.  The other input to the splitter is 
connected to a filtered version of the Cable Company feed.  If they do 
the filtering, you don't need to.  If they don't filter, ask them to or 
add a filter.  You may be sol if they don't filter and can't give you a 
filter although you may be able to find one somewhere.

This assumes the digital channel is above the highest OTA channel and 
that the upstream is below channel 2.  Check these assumptions with your 
cable company before spending money unless this is extremely important 
and you can't get an answer.

If it were me, I would run another coax but I am assuming this is 
difficult or you would not have asked.

Allen