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Roanoke, VA / Bluefield, WV - HDTV - Page 192

post #5731 of 6116
Quote:
Originally Posted by Trip in VA View Post

A little bird tells me that the new HD master control goes online overnight tonight...

- Trip

Is that one HD controller for both channels or two controllers - one for each channel?

I guess these controllers require very high power processors...
post #5732 of 6116
Thread Starter 
Well, these days a master control is made up of a number of individual computers that work together. I suspect, though I don't know for sure, that WFXR and WWCW are both being run largely through the same set of computers, although there are likely separate components in some areas.

- Trip
post #5733 of 6116
I am in Lynchburg and 27.1 has never been a problem for me over the years. Now I have attempted to watch NFL on two Sundays and the signal is weak with plenty of dropouts. My other networks seem okay. Does anyone have any insight into this? Has something changed? Thanks! Oh this is the extent of my hd viewing for months so I don't have other programs on wfxr to compare this to.
post #5734 of 6116
I've never had a problem with fox 27. Currently (10:30) I have 90% quality and 31 db SNR.
post #5735 of 6116
Quote:
Originally Posted by lburgguy View Post

I am in Lynchburg and 27.1 has never been a problem for me over the years. Now I have attempted to watch NFL on two Sundays and the signal is weak with plenty of dropouts. My other networks seem okay. Does anyone have any insight into this? Has something changed? Thanks! Oh this is the extent of my hd viewing for months so I don't have other programs on wfxr to compare this to.

I have noticed a little weaker signal for about a week or so. I'm in Wyndhurst and my signal strength on 27.1 is normally in the low 80s but lately it has been in the mid 70s. No dropouts for me but the strength is lower for some reason.
post #5736 of 6116
Does anyone know why the CW5 seems to mess up right in the middle of The Vampire Diaries on Thursday nights this is the second thursday in a row.It just drops out to a blank screen often then it seems to run about 5 to 7 mins. of adds that eats up half of the show to fill space it seems.I also noticed it do this during the secret circle last week.I have no idea whats going on but maybe someone else has seen it and can answer whats happening.I havent seen it do much like this on other nights just on thursday nights right in the middle of the vampire diaries.Its really annoying.
post #5737 of 6116
Watching The Secret Circle and 17 mins. into the show the video dropped out and a faded out FOOD LION store snapshot popped on the screen for about 5 or so seconds and then it switched back to the secret circle.Something odd is going on with the channel.
post #5738 of 6116
Whatever is causing issues with this channel during primetime.It also cuts off all programs every night at 8pm when primetime starts and you miss the first few min or so of the program.Its odd.It Happens everynight it seems.It never had these issues when it was 1080i but it is now that its 720p its like the switcher or whatever recieves the CW primetime programming is about a min or so off switching over to receive the primetime and you miss some of the 8pm primetime programming.Like when the show what happened on the show the week before recap gets cut off and you miss the first few mins of the programs.
post #5739 of 6116
Can anyone share why WDBJ is carrying the UNC-NCSU feed instead of the UVA-UMD feed? I'm sure if VT was playing they would not be making this mistake. Ugh.....
post #5740 of 6116
Quote:
Originally Posted by wokisan View Post

Can anyone share why WDBJ is carrying the UNC-NCSU feed instead of the UVA-UMD feed? I'm sure if VT was playing they would not be making this mistake. Ugh.....

The proper satellite coordinates did not match the coordinates on listed on the sheet engineering has. We will investigate.

I think your VT comment is completely unfair and uncalled for.
post #5741 of 6116
Quote:
Originally Posted by wdbjalan View Post

The proper satellite coordinates did not match the coordinates on listed on the sheet engineering has. We will investigate.

I think your VT comment is completely unfair and uncalled for.

I still feel strongly that VT gets preferential treatment/extra attention/coverage in our area (due in part to the success they have enjoyed over the last decade and a half). I assumed that if they were involved in a game, extra prep would have been done to make sure there were no mixups.

My apologies for improperly applying that assumption to this situation. It was a fan's 'heat of the moment' comment. It is not easy to be a Wahoo fan and watch helplessly as your team's media coverage shrinks up over the last 15 years. Heck, my local paper doesn't even have a UVA beat writer anymore....but we certainly have a VT and LU one.

Still I should have kept those frustrations out of this situation.
post #5742 of 6116
I got this in my email today from the engineers.

We are replacing all of our equipment in master Control so we can send out local daytime HD, and what you see are traffic issues where what is on the play list, does not match what is in the Video servers, and switching is now automated, and if the traffic play list is not exactly correct, you will see the issues you describe. We will get it all working correctly in the next few weeks,

Robert Lynch
Engineering Assistant
IT Specialist (CBNT)
540-344-2127

Hopefully it all get worked out soon.
post #5743 of 6116
Just wanted to alert ya'll about a nice product if you are not already aware of it. I purchased a Magnavox MDR513H/F7, HDD/DVD refurbished recorder from Amazon for 159.00 shipped. It is just what I have been wanting, with ATSC, NTSC, QAM tuner. Walmart has some refurb and new ones online at a good price. The one I got can not be told from new and works just great. The 513 has a 350g hard drive. I also ordered a 515 which has a 500g hard drive and it will be here the end of the month. Check them out if you are interested in something like this. Also there is a very good forum on AVS.
post #5744 of 6116
WDBJAlan - Anything going on at Poor Mountain antenna farm? The last day or so I have started to get a fair number of decode errors. In the past WDBJ was stable - 70% with one or two errors a month. This morning it was one or two a minute with quality jumping all over the place.

Anyone else see any changes in the last couple of days?
post #5745 of 6116
Quote:
Originally Posted by Pete-N2 View Post

WDBJAlan - Anything going on at Poor Mountain antenna farm? The last day or so I have started to get a fair number of decode errors. In the past WDBJ was stable - 70% with one or two errors a month. This morning it was one or two a minute with quality jumping all over the place.

Anyone else see any changes in the last couple of days?

Not that I am aware of. I glanced at the transmitter stuff when I came back from D.C. and all looked normal.
post #5746 of 6116
When I got home last night I had "no signal" on any channel. Bypassing the the pre-amp PS got me 13 and 21. Also the PS was warm to the touch. I guess it's time to get a CM7xxx. At least there aren't 2 feet on snow on the roof!

Thanks for checking.
post #5747 of 6116
Quote:
Originally Posted by Pete-N2 View Post

When I got home last night I had "no signal" on any channel. Bypassing the the pre-amp PS got me 13 and 21. Also the PS was warm to the touch. I guess it's time to get a CM7xxx. At least there aren't 2 feet on snow on the roof!

Thanks for checking.

Seems like you found the problem!
post #5748 of 6116
Since my mother-in-law has the TV on from morning till night, to keep peace in the house, I had to get TV reception back FAST! That night I borrowed a small Hi-V/UHF antenna from a friend. As I recall he bought it to play around with about the time of the digital transition because it was small, cheap and had amazing specs. I don't think it got any good reviews. It's the antenna on the right in the attachment.

I put it in the attic hanging off the edge of a plastic storage box that aimed it somewhere between the two antenna farms. It is about six feet lower and four feet SW from the outdoor antenna. For convenience I ran it through a distribution amp to the TV's. (It has a built in preamp.)

To my surprise that antenna works better that the outdoor antenna! All quality levels are 70 to 95% and SNR's are around 29dB the lowest being 26dB. Channel 7/18, one of the weakest became one the strongest. Channel 10/30 one of the strongest became the weakest. Of course 15/3 doesn't exist.

If it wasn't for 15/3 I'd probably make this configuration my permanent solution.



(Trip -- are you going to change your last name?)
LL
post #5749 of 6116
Do they make any preamps that are 300 Ohms in and 75 Ohms out?
LL
post #5750 of 6116
Thread Starter 
Glad to hear the indoor solution is working for you! Except, of course, for WBRA.

Last name?

- Trip
post #5751 of 6116
Quote:
Originally Posted by Trip in VA View Post

Last name?

- Trip

Trip in TN
post #5752 of 6116
Thread Starter 
Nope. A friend recommended that it could now mean "Trip in Viewing Area." I'm going to go with that.

- Trip
post #5753 of 6116
Quote:
Originally Posted by Pete-N2 View Post

Since my mother-in-law has the TV on from morning till night, to keep peace in the house, I had to get TV reception back FAST! That night I borrowed a small Hi-V/UHF antenna from a friend. As I recall he bought it to play around with about the time of the digital transition because it was small, cheap and had amazing specs. I don't think it got any good reviews. It's the antenna on the right in the attachment.

I put it in the attic hanging off the edge of a plastic storage box that aimed it somewhere between the two antenna farms. It is about six feet lower and four feet SW from the outdoor antenna. For convenience I ran it through a distribution amp to the TV's. (It has a built in preamp.)

To my surprise that antenna works better that the outdoor antenna! All quality levels are 70 to 95% and SNR's are around 29dB the lowest being 26dB. Channel 7/18, one of the weakest became one the strongest. Channel 10/30 one of the strongest became the weakest. Of course 15/3 doesn't exist.

If it wasn't for 15/3 I'd probably make this configuration my permanent solution.



(Trip -- are you going to change your last name?)

I am interested in your comment about us being one of the weakest to now be one of the strongest. My understanding is the signal "strength" that is represented by consumer tuners/tv's is not really just signal strength but signal quality. This is a "number" that represents both RF strength and quality. I have been told this by people who are a lot smarter than me. Anyway, what that means is you could have a really strong RF signal, but if the quality (S/N ratio - signal to noise) was not up to par, the number will be lowered.

This year I was able to purchase a Rohde & Schwarz ETL analyzer. It is the "Cadillac" of ATSC test gear. When I started looking at our signal .vs some of the others, what I found concerned me a great deal. We are proud that we met the original FCC HD deadline of May 1, 2002. We made the deadline - on the air with a FULL POWER HD signal. Nobody else in the market did. While this is something to be proud of, 10 years later I found it had it's drawbacks. Our exciters were first generation, developed in the mid 90's as ATSC was being invented. The other stations that went on the air later had the advantage of having better exciters that produced a better quality signal.

***NOTE***
This DOESN'T MEAN A BETTER PICTURE. It means your receiver has an easier time decoding the signal.

I can go on but I lobbied for purchasing new state of the art exciters. My wish was granted and we have brand new Harris APEX exciters. It took our S/N from about 28-29 dBm to 35-36dBm. That is a 7dB difference which is pretty substantial to people in a reception area with a lower RF level. I tend to believe this is what you are seeing.

The funny thing about all this is I wanted to email Trip to tell him, but I thought nahh. Let's see if he notices.

Well about 7 hours after these things went on the air, I get an email at work from him wanting to know what we did to the signal..

I was going to include a power point that shows old .vs new but my VPN isn't working at the moment. I will try later.
post #5754 of 6116
Thread Starter 
Quote:
Originally Posted by wdbjalan View Post

The funny thing about all this is I wanted to email Trip to tell him, but I thought nahh. Let's see if he notices.

Well about 7 hours after these things went on the air, I get an email at work from him wanting to know what we did to the signal.

It helped that there was an off-the-air announcement on Facebook the evening before...

- Trip
post #5755 of 6116
Quote:
Originally Posted by Trip in VA View Post

It helped that there was an off-the-air announcement on Facebook the evening before...

- Trip

*really*?? I didn't know that...
post #5756 of 6116
Thread Starter 
Yes! The Facebook page said WDBJ would be going off the air after midnight that evening, so I checked the signal when I woke up.

- Trip
post #5757 of 6116
Quote:
Originally Posted by Trip in VA View Post

Yes! The Facebook page said WDBJ would be going off the air after midnight that evening, so I checked the signal when I woke up.

- Trip

OK - I would believe that. I usually try to notify as many people as possible.
post #5758 of 6116
Quote:
Originally Posted by wdbjalan View Post

I am interested in your comment about us being one of the weakest to now be one of the strongest. My understanding is the signal "strength" that is represented by consumer tuners/tv's is not really just signal strength but signal quality.

I agree with you. I should have used the term quality. The point I was trying to get across was my amazement at how well that small antenna is working and how much signal conditions vary by moving an antenna a few feet. I didn't know you were making changes at the time. With AGC values below 50% (the weaker the signal the higher the percentage) I have plenty of signal on all channels so the rating level has to be based primarily based on SNR. (I'm not sure how multi-path fits into the equation.) I have always stated that your signal have been very stable with no errors.

BTW 10's quality seems to be going up. They may have been doing some work too. With the outdoor antenna WSLS was 32dB and 97%.

Sony uses the term "level", one of my DVR's uses the term "signal strength." That device might only measuring strength...
LL
LL
post #5759 of 6116
Quote:
Originally Posted by wdbjalan View Post

I am interested in your comment about us being one of the weakest to now be one of the strongest. My understanding is the signal "strength" that is represented by consumer tuners/tv's is not really just signal strength but signal quality. This is a "number" that represents both RF strength and quality. I have been told this by people who are a lot smarter than me. Anyway, what that means is you could have a really strong RF signal, but if the quality (S/N ratio - signal to noise) was not up to par, the number will be lowered.

This year I was able to purchase a Rohde & Schwarz ETL analyzer. It is the "Cadillac" of ATSC test gear. When I started looking at our signal .vs some of the others, what I found concerned me a great deal. We are proud that we met the original FCC HD deadline of May 1, 2002. We made the deadline - on the air with a FULL POWER HD signal. Nobody else in the market did. While this is something to be proud of, 10 years later I found it had it's drawbacks. Our exciters were first generation, developed in the mid 90's as ATSC was being invented. The other stations that went on the air later had the advantage of having better exciters that produced a better quality signal.

***NOTE***
This DOESN'T MEAN A BETTER PICTURE. It means your receiver has an easier time decoding the signal.

I can go on but I lobbied for purchasing new state of the art exciters. My wish was granted and we have brand new Harris APEX exciters. It took our S/N from about 28-29 dBm to 35-36dBm. That is a 7dB difference which is pretty substantial to people in a reception area with a lower RF level. I tend to believe this is what you are seeing.

The funny thing about all this is I wanted to email Trip to tell him, but I thought nahh. Let's see if he notices.

Well about 7 hours after these things went on the air, I get an email at work from him wanting to know what we did to the signal..

I was going to include a power point that shows old .vs new but my VPN isn't working at the moment. I will try later.

Here is where you can see the powerpoint of the results of my exciter changes.

https://docs.google.com/open?id=0BzM...I5OWNkZDg0ZWUz
post #5760 of 6116
Thread Starter 
Damn, that constellation plot really tells the tale.

- Trip
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