CBS pixelation VS signal strength

[bigcheeshead]

Did anyone notice pixelation on CBS with higher signals?
I used to only need 44% steady signal to get flawless reception. Now my indoor antenna with a 44% reception wouldn't even display the picture.
My outdoor atenna, which has dead steady 72% reception, gets pixelations at least once a minute.

Strange............

[Gregg Lengling]

You may have higher signals on your receiver but they are probably multipath...now that you have a high signal with the outdoor antenna try an attenuator to reduce the signal slightly to remove the multipath signals.

[mhz40]

Originally posted by Gregg Lengling
You may have higher signals on your receiver but they are probably multipath...now that you have a high signal with the outdoor antenna try an attenuator to reduce the signal slightly to remove the multipath signals.

Padding the signal to reduce multipath will simply pad the desired signal as well... Yes, padding it down enough may put the reflections below the recievers sensitivity level, but that also kills all of the bennies of putting up the outside antenna in the first place.  IMO, the damage is already done at the antenna if there is multipath.  The only solution is a better (read: narrrower beam width) antenna, to increase the delta between the desired signal vs undesired reflections.

[Gregg Lengling]

This is not totally true as many times situations in the prime viewing area the signal (main signal) is saturating and very strong the attenuator will reduce the reflected signals to a point that they no longer interfere with the main signal.  We have done this many times to cure the problem using a spectrum analyzer to see the results.  This is especially true for those within a few miles of the antenna sites as you can be below the actual radiated signal and even though it is extremely stong the reflections are strong enough to cause problems.

[JohnRacine]

Unfortunately, the same thing has happened here on the south side of Racine.  My meter holds steady at 58 but the drop outs come and go so much that it becomes unwatchable.  The same thing happened last year at this time when the weather warmed up with the problem dissappearing in the Fall with cooler temps.   So, looks like I won't be watching CBS out of Milwaukee again until Fall.

[mhz40]

Originally posted by Gregg Lengling
[clip]This is not totally true as many times situations in the prime viewing area the signal (main signal) is saturating and very strong the attenuator will reduce the reflected signals to a point that they no longer interfere with the main signal. [/clip]

Originally posted by MHz40
[clip]Yes, padding it down enough may put the reflections below the receivers sensitivity level, but that also kills all of the bennies of putting up the outside antenna in the first place.
[/clip]

I think we are saying the same thing, only in different ways...  My point is you are not changing the difference between the desired carrier vs the undesired multi-path by using a pad.  A properly designed antenna layout can.
One other idea worth trying is to de-tune the antenna.  Don't point the antenna directly at the source... move it +/- 30 degrees.  Antennas have natural 'notches' where they reject energy from certain angles relative to straight-on.  You may be able to 'null' out the reflection without sacrificing much of the desired signal.

[ReesR]

How much more time is going to pass before they go to the rated power they could and raise the proper antenna system they are allowed to use?  No amount of discussion here appears to make any difference to Hall.  Anyone who thinks he is doing us any favors just doesn't understand the simple bottom line.....we are trying to receive Ch 58 with relatively low power and a directional transmitting antenna pointed west of their tower.

Correcting these issues will cure most of everyone's problems but because they are not willing to invest in their high definition viewers I suggest you merely write them off like I have.  There is plenty to look at elsewhere.

Anything else merely results in ==>  :bang:

This is my first post in many months.  Looks like I haven't missed much.  I truly had hoped to see evidence of improvement in this subject.

[bigcheeshead]

So I figured I had multipath issues having the building and trees in the way. I finally got permission from the caretakers in my apt to mount the antenna on the roof. I got this thing positioned perfectly.
NBC upper 90%
ABC upper 90%
PBS upper 60% working fine too.
FOX who cares

CBS upper 70%

All channels are working great except for CBS AGAIN. I did find out that the strong signal was my problem.  So I moved the antenna to get CBS at around 50% which worked without any pixelation.
The problem is that all the other channels disappear or get pixelated because I'm pointing the antenna in the wrong direction to dumb down CBS.
   Same problem with the attenuator. It drops the signal so CBS can be displayed but everything else gets pixelated due to low low signal.
  I just don't understand why ONLY CBS is having this problem and none of the other stations.


AAAAAARRRRRRRGHHHHHHHHH