CM-4228HD Vs. Solid Signal Xtreme Signal HDB8X

Jim1348

DTVUSA Member
#1
I am currently using an older, legacy Channel Master 4228HD in the attic above my attached garage. To keep my wife happy, I want to keep the antenna out of site. Most of the channels come in well, but as is often the case, it is a compromise. If I adjust the antenna for some channels, other vanish. Classic MPDI (Multi Path Distortion Interference). What I am wondering about is if the Solid Signal Xtreme Signal HDB8X can overcome that issue, since it can be pointed in two directions?

And, at the risk of pointing out the obvious, some tuners that I use get ALL of the channels I Want currently. It is just that some of the slightly older tuners are a little more finicky. I also have a variable attenuator around here that might be useful, if I can locate it!
 

Fringe Reception

Super Moderator, Chief Content Editor
Staff member
#2
Jim,

You're a long timer here and you are probably correct that your reception is troubled by Multi Path reception /distortion and that explains my own troublesome reception issues as well. Yes, newer 'generation' tuners do a better job reassembling (confused) digital data and that also fits my issues. I add, in my experience some tuners seem to 'favor' certain channels and others do the opposite. I have no idea why.

Thanks to a PRO antenna installer friend, I had several opportunities to 'see' the actual waveform shapes of the RF and actual signal strengths of signals I receive on his $3,000 Sadelco Meter and I assure you the waveforms (and signal strengths) can change dramatically by moving your antenna 12 to 24 inches up / down / right / left / forward / backward. Forget signal strength because it hardly matters and focus on finding a decent waveform which provides a 'clean-enough' signal that all of your tuners can decode. I strongly suggest you move your antenna to see if you can discover a better location for it.

There is no way to know if a hinged HDB8X would improve your reception but consider when the twin 4-bay panels are pointed in different directions there will be 50% signal strength loss on both panels: it might work or it won't. Check this website and scroll to 'the two antenna trick' ... http://www.hdtvprimer.com/ANTENNAS/ganging.html#ROS

Regarding using an attenuator: http://www.megalithia.com/elect/aerialsite/dttpoorman.html

Here is an antenna comparison 'shoot-out' I did a few years ago using an attenuator: http://www.dtvusaforum.com/threads/...el-Master-4221-shootout!?highlight=attenuator

I did the above two-day test using a Commercial Grade 75 ohm pad (a photo in an album here) and it did not improve my reception at all ... but it helped me determine which of several antennas I tested was best for my setup. In my case, a physically smaller antenna was better than larger antennas and my guess is my CM-4221 collects less multi-path than the larger antennas I tested.

In the analog TV days it was (sometimes) possible to drop low signal level 'ghosts' (multi-path) down so low that the front end of a TV tuner couldn't detect and there could be improved pictures. Our digital tuners are different because they can decipher incredibly low level signals.

Here is another link that explains why moving an antenna may help. Good luck, Jim and keep us posted! :thumb: http://www.hdtvprimer.com/ANTENNAS/siting.html

Jim
 
Top