Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Television Broadcast Theory

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #16  
Old 11-03-2017, 11:16 AM
philcophan philcophan is offline
VideoKarma Member
 
Join Date: Aug 2013
Location: Lehigh Valley, Pa
Posts: 48
DTV has it's pluses and minuses for certain. Here in Allentown, we have channel 2, KJWP, on the same stick as all the other channels, yet it craps out exactly at sunset... it may or may not return as the evening continues... go figure. Their power is minimal in my estimation... like 7.6kw or something like that. Channel 6, WPVI, has been absent since the transition but ABC, for what it's worth (nothing), is available on 16 from Scranton. My BIGGEST gripe is move the antenna a degree or two and you lose it... must be aimed dead nuts on!!! My antenna is the biggest whopper Antennacraft ever made, the Discovery D9000, I think is the model. I have another and am considering stacking two.
My buddy lives 14 miles south of me on a higher area and receives NY, Philly, Baltimore and sometimes Washington reliably... I'm thinking the higher and bigger the better... YMMV...

Jim
Reply With Quote
  #17  
Old 11-04-2017, 06:40 PM
benman94's Avatar
benman94 benman94 is offline
Super Moderator
 
Join Date: Jun 2011
Location: Detroit, MI
Posts: 842
Well I have a bit of egg to wipe off of my face... My grandparents called me, irate that their TV set was on the fritz again. I went over to look at the situation and discovered that only channel 28 WCMZ was coming in. I dragged along a small table top flatscreen, hooked it directly up to the antenna, and discovered that all of the Detroit stations, all of the Flint/MBS stations, and all but one of the Lansing stations were coming in fine.

To make a long story short, I had a newer section of quad shield RG-6 (that I had replaced when changing the antenna out) that had more than likely been bad from day one and was only getting progressively worse. The moral of the story? Don't trust that anything has been manufactured correctly. I replaced a 25 foot section of wire inside the house and now they have more stations than they had in the analog era.

They still can't get WILX, which they could get before the analog shutoff, but the new stations more than make up for it. I owe Wayne and the others involved in the DTV standards development a qualified apology; VHF performance with DTV is less than ideal, but it's a hell of a lot better than I thought it was. This does bring up another point though, trouble shooting with analog was much easier than it is with the DTV standard.

Anyway, I'm sorry guys.

Last edited by benman94; 11-04-2017 at 07:27 PM.
Reply With Quote
  #18  
Old 11-04-2017, 07:33 PM
old_tv_nut's Avatar
old_tv_nut old_tv_nut is offline
See yourself on Color TV!
 
Join Date: Jul 2004
Location: Rancho Sahuarita
Posts: 4,288
Quote:
Originally Posted by benman94 View Post
...This does bring up another point though, trouble shooting with analog was much easier than it is with the DTV standard.
...
For sure. One of the inventors of digital VSB liked to say that "analog is the window on the RF world." The problem is that you don't see varying quality as you adjust an antenna or repair a RF feed - the picture is only there or not there, and you have no idea how much head room you have above the threshold. Some manufacturers have attempted tuning aids that give some sort of signal quality indication, perhaps combining both signal strength and ghost energy, but this has been only modestly successful as far as I know.
__________________
www.bretl.com
Old TV literature, New York World's Fair, and other miscellany
Reply With Quote
  #19  
Old 11-04-2017, 09:00 PM
Colly0410 Colly0410 is offline
VideoKarma Member
 
Join Date: Jul 2014
Location: Hucknall, Nottingham, England.
Posts: 101
Here in England it's all UHF & has been for 40 odd years. Digital is rock solid now they've upped the power after analog closedown. My local transmitter (Waltham) used to be 250 Kw's TX'ing 5 channels in the analog days; it's now 50 Kw's for HD & public service (BBC, ITV, ch4 ch5 etc) SD Multiplex's; 25 Kw's for other commercial SD mux's; (Quest, CBS, 5 USA. Food network, Tru TV etc) 5 Kw's for local Nottinghamshire TV station, (with a very directional TX ant) 10.2 Kw's for a mux carrying Viva, Russia today, Al Jazeera etc; & 13.4 Kw's for a mux carrying 5*, More 4+1 & some pay channels. I get all these mux's with no breakup or dropouts with a UHF ant resting on top of the central heating water feed tank in the loft..
Reply With Quote
  #20  
Old 11-04-2017, 11:44 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 8,932
The Zenith DTV converter boxes (IIRC 900/901) have a great signal strength indicator. I always like to use them for setting up an antennas and or DXing.
__________________
Tom C.

What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4

Reading between the scan lines since the mid 2000's.
Reply With Quote
Audiokarma
  #21  
Old 11-06-2017, 10:28 PM
Jeffhs's Avatar
Jeffhs Jeffhs is offline
<----Zenith C845
 
Join Date: Feb 2003
Location: Fairport Harbor, Ohio (near Lake Erie)
Posts: 3,480
DTV may have issues as far as reception range, etc. is concerned, but the picture quality from DTV stations rivals NTSC many times over. I remember watching TV in 4:3 aspect ratio from the '60s until the DTV switch in 2009, and am nothing short of amazed at the improvement in picture quality (over NTSC) afforded by the ATSC standard. I have a 19" flat-screen HDTV that produces a picture sharper and clearer than I ever saw on NTSC analog. I watch my area's local channels via streaming video (Roku), and, again, am very impressed by the much sharper/clearer picture afforded by DTV; needless to say, I would never go back to NTSC analog, even if I could.

DTV's reception problems are here to stay in most areas, due to the lower ERP power (compared to NTSC) of local stations. The use of an outdoor TV antenna, cable, or satellite is almost mandatory to receive consistently good pictures from DTV stations. Of course, if you want to sidestep these issues, you can--by using devices such as Roku, Google TV, Apple TV and other streaming-video boxes. "Cord cutting" has become very popular in the US, much to the dismay of the cable companies. The number of cable subscriptions, in fact, has dropped dramatically since the introduction of streaming-video players such as the ever-popular Roku, et al., which is no doubt making the nation's cable operators very nervous as to their future survival in the 21st century. As cable TV subscription prices continue to rise (and the quality of said service declines at the same time in many cases), I see many cable operators scaling back their services or, at worst, going out of business entirely. Many people, myself included, do not like the idea of using a cable box ahead of their TV (to say nothing of paying outrageously high cable-TV bills), so I think the sales of OTA TV antennas and streaming-video devices will continue, as strong as or stronger than ever, as they have for some time.

Will streaming video eventually kill cable and satellite TV? Only time will tell, although, as I said, the increasing popularity of the Roku and other SV boxes means fewer subscribers, which is not good news by any means for pay-TV providers. Then again, perhaps cable and satellite TV may have seen better days, and it could be time to move on to better technologies.
__________________
Jeff, WB8NHV

Collecting, restoring and enjoying vintage Zenith radios since 2002

Zenith. Gone, but not forgotten.
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:08 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.