combine ch 3 and ch 60 or 73 same cable

[kevinmcf]

I just got my 722 and still have my older 508's in use. The 508's use channel 3 to feed to other TV's. Have a series of A/B switches I use to switch from 1 508 to other so you can watch either one on any of my 5 TV's.
Now the 722 default coax out on TV 2 is ch 60. I put a splitter to combine ch 3 (from 508) and ch 60 (722 TV2)to same A/B input switch, to be able to switch between both 508's, so any TV can watch either 508 on ch 3 or change to
ch 116 to watch the 722 TV2. Both use UHF remotes (ch 116 is a sister to ch 60). I have a new sony in my daughters room a 4 year old sony in son's room in office newer 22" flat panel Monitor (w/PIP window my PC) the 508's picture is on ch 3 is good (for SD anyway) the 722 ch 116 is just OK, but the older CRT TV 36" sony XBR In basement is snowy and has a hum.
I called dish was told to switch from ch 60 air (default ) to cable ch 73 in system settings. and that 73 is a sister ch 3
has anyone else tried this?

 

[jmel]

I just got my 722 and still have my older 508's in use. The 508's use channel 3 to feed to other TV's. Have a series of A/B switches I use to switch from 1 508 to other so you can watch either one on any of my 5 TV's.
Now the 722 default coax out on TV 2 is ch 60. I put a splitter to combine ch 3 (from 508) and ch 60 (722 TV2)to same A/B input switch, to be able to switch between both 508's, so any TV can watch either 508 on ch 3 or change to
ch 116 to watch the 722 TV2. Both use UHF remotes (ch 116 is a sister to ch 60). I have a new sony in my daughters room a 4 year old sony in son's room in office newer 22" flat panel Monitor (w/PIP window my PC) the 508's picture is on ch 3 is good (for SD anyway) the 722 ch 116 is just OK, but the older CRT TV 36" sony XBR In basement is snowy and has a hum.
I called dish was told to switch from ch 60 air (default ) to cable ch 73 in system settings. and that 73 is a sister ch 3
has anyone else tried this?

I don't know what others would recommend, but I think it would help to see a diagram if nothing else.

You might have to use some filters in this setup.

Myself, I don't have this type of setup, but I distribute cable tv, modulated security cameras, and tv2 from my vip622 (similar to 722).

I put a lpf600 filter in place to block backfeed into the cable system for the modulated security cams and tv2 output, both of which are on channels over 100. I have no snow or hum or anything, just strong picture to all 4 tvs. I use a splitter/combiner to combine the 3 signals (catv, cams, tv2 from vip622) and then feed the output to another splitter/combiner that feeds the 4 tvs in the house.

 

[kevinmcf]

Filter sounds like the way to go

I tried to draw freehand looks worse then it is.
how do you determine what filter is needed.

 

[RandallA]

Channel 60 is OTA so you should use Cable channel 73. Just combine both with a regular splitter. On the TV, just change from channel 3 to 73 and viceversa.

 

[kevinmcf]

this will work? or you assume this works (wife is getting tired of me pulling TV out) sorry I could not get back sooner.