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Boston, MA - OTA - Page 237

post #7081 of 10632
Quote:
Originally Posted by Naylia View Post

Are other people still having issues with WFXT??? I am now getting signals consistently in the high 80's low 90's at about 28/29 db but occassionally the signal drops to 0%/0db and then comes back a couple seconds later. Any one else experiencing similar?

I'm having the same issue. Signal is at 27 dB and then drops to 0 dB. I feel like it's happening less than before though. Anyone want to call WFXT to see if we can get this resolved?

EDIT: Nevermind. Just as I was writing this, the signal kept dropping out like crazy, so it's the same as before.
post #7082 of 10632
Quote:
Originally Posted by nahos81 View Post

I'm having the same issue. Signal is at 27 dB and then drops to 0 dB. I feel like it's happening less than before though. Anyone want to call WFXT to see if we can get this resolved?

EDIT: Nevermind. Just as I was writing this, the signal kept dropping out like crazy, so it's the same as before.

What you guys are describing sounds like multipath interference. It's not the station's fault, but a reception issue on your end. Some tuners are better at handling multipath than others. Changing the antenna location can also help.

In Billerica with an antenna inside in a 3rd floor attic and using my accessDTV cards and HD Tivos as tuners, WFXT DT is coming in just fine right now and almost always does.

Cambridge can be a tough area for reception.
post #7083 of 10632
Quote:
Originally Posted by gsr View Post

What you guys are describing sounds like multipath interference. It's not the station's fault, but a reception issue on your end. Some tuners are better at handling multipath than others. Changing the antenna location can also help.

In Billerica with an antenna inside in a 3rd floor attic and using my accessDTV cards and HD Tivos as tuners, WFXT DT is coming in just fine right now and almost always does.

Cambridge can be a tough area for reception.

I understand what you are saying, but before the summer, WFXT-DT was coming in perfectly. What change would cause multipath interference? Everything on my end is the same as before.

I have 3 tuners--a Sony KDF-E42A10 ATSC tuner, a FusionHDTV PCI tuner, and a FusionHDTV USB tuner--and I see the same issue with all of them.

I will do what you suggested and try moving the antenna around though. Hopefully it will work.
post #7084 of 10632
Quote:
Originally Posted by nahos81 View Post

I understand what you are saying, but before the summer, WFXT-DT was coming in perfectly. What change would cause multipath interference? Everything on my end is the same as before.

Leaves on the trees can make a big difference.
post #7085 of 10632
For Bob Yankowitz:

What is up with the TV38 program guide and scheduling starting next week? I have Jeopardy set up as a Season Pass in my D* HD TiVo, and as of next week all the shows are showing up twice, at 7:30 and again at 9:30. Is Jeopardy going to be on twice? If so, can you change the flagging on the second one so it's not listed as a new show and confusing my TiVo which I've set for first run only? Otherwise, I will have to manually delete every second show from the "To Do List."

TIA

SMK
post #7086 of 10632
Quote:
Originally Posted by RoyGBiv View Post

For Bob Yankowitz:

What is up with the TV38 program guide and scheduling starting next week? I have Jeopardy set up as a Season Pass in my D* HD TiVo, and as of next week all the shows are showing up twice, at 7:30 and again at 9:30. Is Jeopardy going to be on twice? If so, can you change the flagging on the second one so it's not listed as a new show and confusing my TiVo which I've set for first run only? Otherwise, I will have to manually delete every second show from the "To Do List."

TIA

SMK

Apparently Jeopardy is going to be on twice, as you say. I'll pass on your concern to the folks who do the scheduling to see if there's anything they can do.
post #7087 of 10632
Quote:
Originally Posted by gsr View Post

Leaves on the trees can make a big difference.

I moved the antenna approximately 8 inches. 25.1 is coming in at about 30 dB now, and I have seen no signal drops or stutters. I'll keep on monitoring to be sure.

On an entirely separate note, did anyone have trouble with 7.1 during Studio 60? MCE only recorded about 10 minutes. The event viewer said there was a signal loss during the recording. Not sure what the problem is. Hopefully, it's not my computer. If so, I really hope it doesn't happen again. By the way, of the 10 minutes I did see, Studio 60 is damn good. I'm definitely going to have to Netflix the pilot to catch the rest.
post #7088 of 10632
Quote:
Originally Posted by nahos81 View Post

On an entirely separate note, did anyone have trouble with 7.1 during Studio 60? MCE only recorded about 10 minutes. The event viewer said there was a signal loss during the recording. Not sure what the problem is. Hopefully, it's not my computer. If so, I really hope it doesn't happen again. By the way, of the 10 minutes I did see, Studio 60 is damn good. I'm definitely going to have to Netflix the pilot to catch the rest.

I was watching it as it aired, and I noticed that it started out airing as an SD show, in that it had the thick black border all the way around the image, then around 5 to 10 minutes in, there was a click/crackly noise and, in the middle of a scene, the image suddenly jumped to full screen HD. It was sort of surreal to see the "in HD where available" overlay airing in SD on such a major station. I can only assume someone at WHDH-DT was asleep on the job.
post #7089 of 10632
Quote:
Originally Posted by RYankowitz View Post

Apparently Jeopardy is going to be on twice, as you say. I'll pass on your concern to the folks who do the scheduling to see if there's anything they can do.

It's been reported that 38 will be starting a 9:30 newscast shortly, so I suspect the extra JEOPARDY is a stop-gap measure tl the newscast starts. The TiVO apparantly uses the guide descriptions to determine what it records, so if there is no description, it assumes it's a new episode. Happens to me a lot with non-network shows. I have a plethora of COLBERT REPORTS that want to record.
post #7090 of 10632
Quote:
Originally Posted by Tempus View Post

I was watching it as it aired, and I noticed that it started out airing as an SD show, in that it had the thick black border all the way around the image, then around 5 to 10 minutes in, there was a click/crackly noise and, in the middle of a scene, the image suddenly jumped to full screen HD. It was sort of surreal to see the "in HD where available" overlay airing in SD on such a major station. I can only assume someone at WHDH-DT was asleep on the job.

Yeah, I noticed that too. I was able to record through the point where it switched over to HD.
post #7091 of 10632
Yeah, I saw the glitch, too. I was watching on an SD set, but had tuned the HD feed, 'cause I'd rather have the letterboxed picture than the clipped version (or is it the other way around), but either way, it was pretty jarring when it happened.
post #7092 of 10632
Hi all. I'm new to posting at AVSF but read frequently and appreciate the helpful info.

I'm having an issue myself lately with the OTA HD (UHF) signal for the local CBS station. I'm using an HD Tivo with an attic antenna to capture the OTA signals. I get perfect reception for all stations but seem to get pixilization with CBS. Some nights, I have no problem at all, and other times, my signal strength will be bouncing from the low 90s down to the high 20s and when it drops low enough, poof, pixilization. I have a clear shot to the sky, no trees or other possible interference. Ironically, last night, in the pouring rain, no pixilization issues. Monday night, clear sky, and I have cut off recordings of anything I tried to record on CBS.

I had a similar problem with CBS from a prior house with the same equipment. I'm inclined to think its a broadcast issue (but don't see others talking about it). if it were the antena, would I have great reception on the other stations (or even get to 90+% signal strength sometimes)? If it were the DTV box, wouldn't it happen on all OTA stations (dropping signal strength)?

Any thoughts?
post #7093 of 10632
Quote:
Originally Posted by boston_garrett View Post

Hi all. I'm new to posting at AVSF but read frequently and appreciate the helpful info.

I'm having an issue myself lately with the OTA HD (UHF) signal for the local CBS station. I'm using an HD Tivo with an attic antenna to capture the OTA signals. I get perfect reception for all stations but seem to get pixilization with CBS. Some nights, I have no problem at all, and other times, my signal strength will be bouncing from the low 90s down to the high 20s and when it drops low enough, poof, pixilization. I have a clear shot to the sky, no trees or other possible interference. Ironically, last night, in the pouring rain, no pixilization issues. Monday night, clear sky, and I have cut off recordings of anything I tried to record on CBS.

I had a similar problem with CBS from a prior house with the same equipment. I'm inclined to think its a broadcast issue (but don't see others talking about it). if it were the antena, would I have great reception on the other stations (or even get to 90+% signal strength sometimes)? If it were the DTV box, wouldn't it happen on all OTA stations (dropping signal strength)?

Any thoughts?

The problem you're having sounds like it could be multipath distortion. That happens when you are close enough to the transmitter so that reflected signals (such as off of buildings or other objects) are strong enough to interfere with the direct signal from the transmitter. Multipath distortion is easy to see with an analog signal, appearing as outlines or ghosting. Unfortunately, with digital it's much harder (for an average person at least) to evaluate the signal quality. It makes sense that it would go away when it rains, because rain attenuates the UHF signal, so the reflections could get so weak as to have no effect. A possible solution is to get a more directional antenna, although you may find then that there is no single position for the antenna that works for all stations.
post #7094 of 10632
I agree it's likely multipath, but it is somewhat strange it only effects local CBS because local ABC and PBS are also using the same transmission antenna CBS is. It would help if you told us where you are and what antenna you're using.

SMK
post #7095 of 10632
I have had the same problem for years and believe it is multipath. What I have done is gotten myself a silver sensor indoor antena and that works great for the most part. I am about 6-7 miles from the antenna farm all other stations come in good except 5 which I hardly watch but the indoor antenna takes care of that. I think you said you have the HD Tivo which is known for bad tunners on OTA signals my TV tunner works great.

Good Luck I know what a pain it is to have this problem.
post #7096 of 10632
Quote:
Originally Posted by RoyGBiv View Post

I agree it's likely multipath, but it is somewhat strange it only effects local CBS because local ABC and PBS are also using the same transmission antenna CBS is. It would help if you told us where you are and what antenna you're using.

SMK


I'm in Wellesley (2.2 miles from source for WBZ-DT, WCVB-DT) on a large lot with little for the signal to be bouncing off to create the multipath problem. I have no issues at all with ABC but admittadly don't watch/record much PBS. I'm using the Winegard Square Shooter. I have the signal amplified after a long run from the attic to basement head end where the box is located.
post #7097 of 10632
Quote:
Originally Posted by boston_garrett View Post

I'm in Wellesley (2.2 miles from source for WBZ-DT, WCVB-DT) on a large lot with little for the signal to be bouncing off to create the multipath problem. I have no issues at all with ABC but admittadly don't watch/record much PBS. I'm using the Winegard Square Shooter. I have the signal amplified after a long run from the attic to basement head end where the box is located.

Multipath is a tricky fella. It does not respect all stations equally, but is dependant on your location and the frequencies (more accurately, wavelengths) involved. So your reception of WCVB-DT on channel 20 (and WGBH-DT, channel 19) may be significantly different than on WBZ-DT, channel 30, which is 60 mHz higher. Move your antenna by just the right amount and you'll get WBZ fine, but lose WCVB!

I wouldn't look to your houselot for the bounces. It's the really big buildings (and in other parts of the country, mountains) that cause the problems. In your case it could be the Pru or Hancock.

When I was a kid in Brooklyn in the early 70's the biggest disaster for TV reception was the move of the TV transmitting antennas to the World Trade Center. The ghost caused by the bounce off the Empire State Building ruined television for millions of New Yorkers. I remember the dire predictions in the newspapers that turned out to be correct. On the other hand, had the stations not moved, there still would have been a bounce off the WTC, so they were in a bad position no matter what they did. It was good for the cable companies, though.
post #7098 of 10632
Bob, I looked at the "To Do List" in my HD TiVo last night, and the Jeopardy scheduling issue seems fixed. Only the 7:30 showings are set to record, so I guess TV38 fixed the info they are sending out regarding first run/repeats. Thanks for the help.

SMK
post #7099 of 10632
Quote:
Originally Posted by RYankowitz View Post


I wouldn't look to your houselot for the bounces. It's the really big buildings (and in other parts of the country, mountains) that cause the problems. In your case it could be the Pru or Hancock.

I guess my head says if its the Pru or Hancock (by the way, over 10 miles away at almost a 90 degree angle from me and the tower (2 + miles away)), then it would seem anyone in my area would be experiencing the same issues. Not sure whether they are or not. Would a more directional antenna solve the problem? How about relocating the antenna from inside the attic to outside on the roof?

By the way Bob, thanks for the info direct from the source!
post #7100 of 10632
I get some kind of interference on D* HD CBS Local Station. It is the worst of my locals with interference of some kind on average of once per minute. The last service call I was assured I didn't have a line of sight problem and that there wasn't anything that could be done to fix the problem by technicians here. He said it was an issue with the H20. Now my question if it is the H20 in my house why does the same channel CBS (Channel 4) go through the H20 receiver to my TV from my UHF antenna with preamp, that has nothing to do with D*, separate wiring etc. and give a perfect picture? Signal strength as measured by the H20 is in the 80's. I don't understand why they both wouldn't have the same interference problems if it was the H20 causing the problems. It would seem more logical to my muddled brain that it would be the transponder on the satellite.
post #7101 of 10632
Quote:
Originally Posted by pato_ma View Post

I get some kind of interference on D* HD CBS Local Station. It is the worst of my locals with interference of some kind on average of once per minute. The last service call I was assured I didn't have a line of sight problem and that there wasn't anything that could be done to fix the problem by technicians here. He said it was an issue with the H20. Now my question if it is the H20 in my house why does the same channel CBS (Channel 4) go through the H20 receiver to my TV from my UHF antenna with preamp, that has nothing to do with D*, separate wiring etc. and give a perfect picture? Signal strength as measured by the H20 is in the 80's. I don't understand why they both wouldn't have the same interference problems if it was the H20 causing the problems. It would seem more logical to my muddled brain that it would be the transponder on the satellite.

My understanding is that this is a nationwide problem with D* and their MPEG4 HD channels in all markets. The H20 maybe part of the problem in how it decodes the KA MPEG4 stream. D* are aware of the problem have been saying the have been working on fix since this problem was first reported earlier this year. I have also heard that 1080i (CBS for example) are more prone to this problem.

The OTA channels do not go though the same process as the KA DBS channels.

Bottom line, the installers is mostly right. It is not anything he can fix and it is not an LOS issue. You may want to call and complain to D* and and ask for credits programming credits until they resolve the issue.
post #7102 of 10632
Quote:
Originally Posted by RoyGBiv View Post

Bob, I looked at the "To Do List" in my HD TiVo last night, and the Jeopardy scheduling issue seems fixed. Only the 7:30 showings are set to record, so I guess TV38 fixed the info they are sending out regarding first run/repeats. Thanks for the help.

SMK

I'm afraid I can only take credit for trying. We haven't changed anything.

According to the person I bumped it to, two levels up, "I called the company that gives the listings to Tivo and they do not distinguish between the M-f 1st run, weekend run, or M-F second run. The person can modify his Tivo record for the M-F 7:30pm only."

I don't know if that last bit of advice is accurate or not, but there it is, I'm afraid.
post #7103 of 10632
Anyone noticing any signal drift on WCVB-DT? Looks like spurious emissions. I have not put a scope on it yet but I have a clean lock on WGBH so I'm not really thinking atmospheric or multimpath issues from my receive point. Plus I noticed they have some hanging green pixels at the top of their SD picture. Something breaking down there?

Also, Audio on WSBK-DT? Anyone?
post #7104 of 10632
Hey guys,

I seem to be getting pixelation across the board on my digital stations last night and this morning even though my signal strength is reading in the 90% to 100% at 29 to 31db for the stations. Could this be a multipath issue? Any thoughts? Ideas to try to reduce multipath that I can buy locally?

Currently I am using a Terk HDTVa...
post #7105 of 10632
The Audio on WSBK has been screwed up for days. It sounds like low quality/bitrate Mpeg Internet feed.
post #7106 of 10632
Quote:
Originally Posted by Brian.Leveille View Post

All,

Did WGBH-DT make a change to their PSIP programming recently?

The reason I ask: A few months ago when I got my TV (a HLS-4666W DLP from Sansung), I could not tune in WGBX-DT (44.1) via OTA. When I did, my TV would endlessly reboot. At that time, I thought it was OK because I never watched that channel. Removing it from my channel manager solved the reboot problem at that time.

Just a couple of days ago, the exact same issue is now occurring for me on WGBH-DT (2.1). WGBH is a channel that I really want to watch, so removing it from my channel manager is not an option.

I called Samsung tech support today. The first level support guy said he'd never heard of such an issue and forwarded me to 2nd level support. The 2nd level support tech knew exactly what my problem was. He said that the station was using an old version of PSIP which was causing the TV to reboot. He said there was no way to fix this issue. He told me that I must take this issue up with the station.

What?!>!?!?! I spent over $1000 on this TV and I can't watch certain stations?

Also, WGBH worked great for months. Why would they suddenly 'downgrade' their PSIP?

My question to you all: does anyone know about this PSIP issue, and does anyone know of a technician I can contact at WGBH to inquire about their PSIP versioning?

If this issue can't be resolved, I'll be sending the TV back and not recommending Samsung to anyone.

Any help is greatly appreciated!

-BL


All,

On a whim, I decided to tune in WGBH-DT (channel 2-2) last night and was relieved to see that I can now watch it again without my TV continually rebooting. Something at WGBH must have been fixed. I still can not tune WGBH-DX (44), as my TV still reboots on that station.

I have an email thread going with WGBH support (although I haven't really gotten anywhere with them yet. I'm still waiting to talk to a real engineer.) I'll tell their support folks about how WGBH-DT (2.2) is working again for me and ask that they make the same change to 44.x to see if that works for me.

I'll let you know how it all pans out.

Thanks,

-BL
post #7107 of 10632
Quote:
Originally Posted by Naylia View Post

Hey guys,

I seem to be getting pixelation across the board on my digital stations last night and this morning even though my signal strength is reading in the 90% to 100% at 29 to 31db for the stations. Could this be a multipath issue? Any thoughts? Ideas to try to reduce multipath that I can buy locally?

Currently I am using a Terk HDTVa...

Apparently I yanked the cable on my antenna and loosened the connector (guess I did a shoddy job crimping it ). Relized the inner core was barely making a connection. New crimp job and it's all set
post #7108 of 10632
Quote:
Originally Posted by gregmp View Post

The Audio on WSBK has been screwed up for days. It sounds like low quality/bitrate Mpeg Internet feed.

We've looked into the problem (even going so far as to listen to the audio!), and we cannot duplicate it. We have made no changes to the configuration of our equipment in quite a while. Do you notice it on any particular show or shows? Any other details you can offer? Let me know and I'll pursue it further.
post #7109 of 10632
While watching Gray's Anatomy last night the feed froze twice on the OTA signal and D* had a blank screen on Channel 5 ABC. Anybody else experience this?
post #7110 of 10632
Didn't watcch GRAY'S, but there were problems with UGLY BETTY (other than her being ugly, of course). The first 10 minutes or so were in SD before someone at ABC finally caught on, and it switched to HD. Are they stupid or what. There were a couple of audio dropouts, but brief, after that.
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