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post #11551 of 11568 Old 07-05-2017, 04:07 PM
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Originally Posted by aleckrohto View Post
Can't I install a pre-amp and it will boost the signals to higher levels, for example if I wanted to get WJAR, I would get a CM-4228HD which has 12dB of UHF gain and a channel master amp with 30dB of gain add those numbers together to get 25.7dB.
In theory, the numbers add up OK. However in practice, if the Noise Margin is negative, you would be amplifying noise more than the signal. Also, Tropo reception is dependent on the current atmospheric conditions, and is quite unstable. If there is a possibility of mounting the antenna higher, see what TV Fool shows for 30 or 40 feet.
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post #11552 of 11568 Old 07-05-2017, 04:12 PM
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In theory, the numbers add up OK. However in practice, if the Noise Margin is negative, you would be amplifying noise more than the signal. Also, Tropo reception is dependent on the current atmospheric conditions, and is quite unstable. If there is a possibility of mounting the antenna higher, see what TV Fool shows for 30 or 40 feet.
When I put it at 40 feet, the NM is -2.8dB, WNAC is at 1.7 and WPRI is at 1.2. Is noise margin the same thing as signal noise ratio? Also, It seems like on my TV fool report that I can get WCVB better than it suggests since the SNR is 29 when near the window. Not sure what to take from all of this.

Last edited by aleckrohto; 07-05-2017 at 04:24 PM.
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post #11553 of 11568 Old 07-06-2017, 03:17 PM
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Quote:
Originally Posted by aleckrohto View Post
When I put it at 40 feet, the NM is -2.8dB, WNAC is at 1.7 and WPRI is at 1.2. Is noise margin the same thing as signal noise ratio? Also, It seems like on my TV fool report that I can get WCVB better than it suggests since the SNR is 29 when near the window. Not sure what to take from all of this.
SNR is signal level to noise level ratio, anything above 20 is considered good enough to receive a HDTV signal, the higher the better. Generally under 20 you'll get pixelation and in my experience below 17 and picture drops out completely. Each TV receiver is different though, some have better receiver sensitivity then others.

TVFool guesstimates the Noise Margin, without putting up an antenna it's tough to know what the noise floor will look like at your location.

But why are you trying to get channels out of Providence and Portland when you would have much better luck with Boston and Manchester stations?
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post #11554 of 11568 Old 07-06-2017, 03:26 PM
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SNR is signal level to noise level ratio, anything above 20 is considered good enough to receive a HDTV signal, the higher the better. Generally under 20 you'll get pixelation and in my experience below 17 and picture drops out completely. Each TV receiver is different though, some have better receiver sensitivity then others.

TVFool guesstimates the Noise Margin, without putting up an antenna it's tough to know what the noise floor will look like at your location.

But why are you trying to get channels out of Providence and Portland when you would have much better luck with Boston and Manchester stations?
Just because I get tired of watching my local stations and want some variety. I really think TV Fool is off because it says my noise margin for WUNI-TV is -5.6 at 15ft and I can get that station fine with an indoor antenna.

Last edited by aleckrohto; 07-06-2017 at 03:35 PM.
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post #11555 of 11568 Old 07-18-2017, 05:25 PM
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Nobody has posted on this thread in the past few weeks or so.. anyway.. This audio issue on WFXT has been going on for a long time now. The surround sound is fine however when I mute the center channel I hear these wired hissing sounds that are some high or low frequency thing and are very annoying. I actually recorded a sample of what it sounds like: https://drive.google.com/file/d/0Bw4...ew?usp=sharing. Anybody have any idea of what this could be. I know this is not normal because I when I checked it on other Fox stations there were no issues
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post #11556 of 11568 Old 07-19-2017, 12:02 PM
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I've noticed WFXT is out of lipsync while none of my other OTA channels are. I am lucky enough to get RI's Fox affiliate so I've just been using that. It also sounds "different".

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post #11557 of 11568 Old 07-19-2017, 06:29 PM
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Originally Posted by Patsfan123 View Post
I've noticed WFXT is out of lipsync while none of my other OTA channels are. I am lucky enough to get RI's Fox affiliate so I've just been using that. It also sounds "different".
I can receive both also. Checking just now, flipping back and forth, the audio seems to be leading the video on WFXT, but is OK on WNAC. The audio does sound slightly fuller or maybe just higher at the bass end on WNAC. It's hard to tell on that frenetic cooking show. I also noticed the entire signal - audio and video - is about 7 seconds later on WNAC.
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post #11558 of 11568 Old 07-19-2017, 07:53 PM
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I wish they could fix all these issues with Fox 25. It was fine before Cox Media Group. You can bring your concerns to WFXT's director of engineering Sean Anker by emailing him at sean.anker@coxinc.com. I would think a bunch of people emailing him about this would yield a change back to the old FOX O&O decoder settings.
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Last edited by aleckrohto; 07-19-2017 at 08:12 PM. Reason: Added email info
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post #11559 of 11568 Old 07-30-2017, 01:45 PM
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Bumping this thread, anybody know why WBZ is broadcasting golf not in full 5.1 sound. WGME is.
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post #11560 of 11568 Old 08-03-2017, 06:20 AM
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Over-the-air TV? A third of Americans have no idea

http://blogs.mprnews.org/newscut/201...-have-no-idea/

"According to the National Association of Broadcasters, nearly 30% of Americans are not aware of over-the-air TV. So, presumably they also don’t know that most every local TV station is broadcasting several different channels of programming, thanks to the mandated conversion to digital broadcasts."

Can't pretend I'm surprised. I'm reminded of a conversation with conversation with a young sales guy at Best Buy a decade ago about getting a DVD recorder with digital tuner. Barely aware of what I asked he asked, "Who's your provider." -- "I use an antenna."-- "No who's your provider!" At which point I told him "I don't subscribe to cable or satellite. I use an antenna". To which he informed me -- "Well you're not gonna get anything that way."

At that point I informed him I get more than 40 channels from Boston, Providence and New Bedford. -- Ironically, at the time a, knowledgeable sales person could switch a demo TV over to Best Buy's own antenna allowing you to view OTA.
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post #11561 of 11568 Old 08-12-2017, 12:35 PM
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Well, GfK says more people are watching broadcast television than any of the alternatives...

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post #11562 of 11568 Old 08-12-2017, 02:26 PM
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Actually, if you add all the others together, including the smaller cablecos, you easily get the 30% figure. Probably even less if you factor in Netflix, Amazon, Hulu, et al.

Walking the fine line between jaw-dropping and a plain ol' yawn.
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post #11563 of 11568 Old 08-12-2017, 05:07 PM
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You don't even need to do that. 72% might not be aware. I think awareness is on the rise, though. You see it anecdotally. Someone installs an antenna then four neighbors have one. We have three on my street. I installed an antenna at my sister's camp so we could watch the Patriots last fall. Now her hubby wants to install one at his primary residence.

A lot of people have tried but failed. You need to know something to install the right antenna properly, point it in the right direction, and get signal to your televisions. I know two people who tried to install UHF antennas in Maine which is predominantly VHF.
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post #11564 of 11568 Old 08-13-2017, 08:17 AM
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Here in Connecticut, we have two standouts for VHF:

WTNH-TV (ABC) channel 8 of New Haven [uses channel 10] tower in Hamden
WEDN-TV (PBS) channel 53 of Norwich [uses channel 9] tower in Bozrah

And nearby:

WWLP-TV (NBC) channel 22 of Springfield, MA [uses channel 11] tower in Agawam, MA

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post #11565 of 11568 Old Yesterday, 12:12 PM
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Looking for ideas for a VHF tv antenna. I am trying to receive WNAC-TV. According to TVFool, it comes straight in with a noise margin of -4.8dB at 30-33 ft. Are there any good VHF antennas out there that could raise that to a positive level to detect it so I could add an amplifier and receive it?
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post #11566 of 11568 Old Yesterday, 02:08 PM
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Quote:
Originally Posted by aleckrohto View Post
Looking for ideas for a VHF tv antenna. I am trying to receive WNAC-TV. According to TVFool, it comes straight in with a noise margin of -4.8dB at 30-33 ft. Are there any good VHF antennas out there that could raise that to a positive level to detect it so I could add an amplifier and receive it?
It would probably help if you described what antenna you're currently using, your location and your environment (elevation, trees, etc.) If I went by TVFool I would have given up on TV or subscribed to cable years ago. Most of the channels I have little difficulty getting including the major Boston channels are in either yellow or pink zones.

In a 3rd floor walk up, in Randolph, MA use a Terk TVa indoor antenna. I struggle to get PRI or NAC and they are marginal due to the crappiness of VHF. I usually have to play with the dipole lengths as well as direction. Channel 7 Boston was smart or lucky to switch from VHF to UHF after the digital transition and reception improvement was dramatic even though it's in my pink zone.

TVFool's theoretical predictions are fine but I advocate trying antennas you can return until you find one that works.
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post #11567 of 11568 Old Yesterday, 05:47 PM
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Originally Posted by rick_evans033050 View Post
It would probably help if you described what antenna you're currently using, your location and your environment (elevation, trees, etc.) If I went by TVFool I would have given up on TV or subscribed to cable years ago. Most of the channels I have little difficulty getting including the major Boston channels are in either yellow or pink zones.

In a 3rd floor walk up, in Randolph, MA use a Terk TVa indoor antenna. I struggle to get PRI or NAC and they are marginal due to the crappiness of VHF. I usually have to play with the dipole lengths as well as direction. Channel 7 Boston was smart or lucky to switch from VHF to UHF after the digital transition and reception improvement was dramatic even though it's in my pink zone.

TVFool's theoretical predictions are fine but I advocate trying antennas you can return until you find one that works.
I am currently looking for an antenna. The Channel Master 4228HD looks good and so does the Stellar Labs Deep Fringe VHF antenna. What would happen if I combined both of these antennas together? How would the gain be?
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post #11568 of 11568 Old Yesterday, 06:13 PM
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Originally Posted by aleckrohto View Post
I am currently looking for an antenna. The Channel Master 4228HD looks good and so does the Stellar Labs Deep Fringe VHF antenna. What would happen if I combined both of these antennas together? How would the gain be?
Post a link to your TvFool.com report.
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