Lost 2 Denver stations this week, help please?

[rabbit73]

Originally Posted by OTAFAN

So, if I'm reading your chart correctly rabbit73, obviously you can have a higher noise floor on VHF low particularly, and still receive a watchable signal than either VHF high or UHF? And almost the opposite for UHF?

You almost have it right. Since the noise level IS higher on VHF, you must have a stronger signal on VHF than UHF to have an SNR of at least 15 dB above the noise.

One of the problems with VHF-Low reception of digital TV signals is that the FCC didn't allow enough extra transmitter power to overcome the higher noise level for reliable reception.

Forgive my learning curve rabbit73. When I became a shortwave enthusiast years ago, the first thing I learned was as long as I get above the noise floor with my receiver, antenna setup etc., I could "catch" the signal I was looking for. And the quieter my noise floor the better for weak signal reception.

I presume similar for TV viewing? Thanks!

That is correct.

[OTAFAN]

Ok, my learning curve just improved.

I really enjoy your classroom, rabbit73! Your postings on this forum truly enhance it!

All the best.....

[Nascarken]

Originally Posted by rabbit73

You almost have it right. Since the noise level IS higher on VHF, you must have a stronger signal on VHF than UHF to have an SNR of at least 15 dB above the noise.

One of the problems with VHF-Low reception of digital TV signals is that the FCC didn't allow enough extra transmitter power to overcome the higher noise level for reliable reception.
That is correct.

I think the Fcc will up the power limitations but lets see how
We'll the new equipment perform 's first ?
And yes SCHOOL is in sessions when Ribbit Ears suggest
On tv broadcasting RF .And even one is paying close attention.
We'll thank you Rabbit ears for all of your hard work and dedication.
We'll everyone happy mother's day!!!

[rabbit73]

Originally Posted by OTAFAN

Ok, my learning curve just improved.

I really enjoy your classroom, rabbit73! Your postings on this forum truly enhance it!

All the best.....

Thank you for your kind words. I keep learning, and I try to pass it on.

A good example of noise interference on VHF-Low is the problem Johnsonbrits is having with being able to receive channel 3:
Winegard HD8200U VHF question
https://forum.tvfool.com/showthread.php?t=16590

First he had to make sure the station was on the air, and then he had to track down the source of noise. At this point, he hasn't completely solved the problem, but he is working on it.