Search found 667 matches

by PID_Stop
Fri Feb 25, 2011 8:18 am
Forum: Digital Television
Topic: Lip sync issues -- but only on some TVs???
Replies: 16
Views: 3772

Re: Lip sync issues -- but only on some TVs???

The Wheel and Jeopardy issues appear to be a problem with Pitch Blue. I know some shows we air from the Pitch Blue server tend to be lip sync hell. Judge Judy in particular can be really bad. And it is the same thing, you watch the show, it is way out in left field, hit the local break, it is dead ...
by PID_Stop
Wed Feb 23, 2011 1:36 pm
Forum: Digital Television
Topic: Lip sync issues -- but only on some TVs???
Replies: 16
Views: 3772

Re: Lip sync issues -- but only on some TVs???

That's very interesting. Oprah is fed live on day of air (we take that for several of the station in our Centralcasting group), and we haven't had any problems with the show. Our CBS competitor across town has had some whopping lip sync errors in the last several days with Jeopardy, on the order of ...
by PID_Stop
Fri Feb 11, 2011 12:43 pm
Forum: From the Trenches
Topic: Have you ever accidently taken yourself off the air?
Replies: 63
Views: 21499

Re: Have you ever accidently taken yourself off the air?

Our original studio was in the basement of a strip mall; in 1967 a fire took us down. In the hurry to get back on the air, old cabling was left in place and new lines were run where needed. Much of the new cabling was run rather haphazardly, using whatever material or path seemed convenient at the m...
by PID_Stop
Fri Jan 14, 2011 8:16 am
Forum: Ask the Engineers
Topic: BNC to RJ45 Converter
Replies: 8
Views: 1840

Re: BNC to RJ45 Converter

Also, remember, usually the content is much more important than image quality (although the best quality you can reasonably pull off should likely be used) This is a good point. Have you considered transmitting anamorphic SD -- that is, taking the 16:9 HD and downconverting it to squeezed 4:3 SD, t...
by PID_Stop
Thu Jan 13, 2011 6:24 pm
Forum: Ask the Engineers
Topic: BNC to RJ45 Converter
Replies: 8
Views: 1840

Re: BNC to RJ45 Converter

Generally, BNC to RJ45 adapters are baluns -- that is, a transformer that matches a 75 ohm unbalanced coaxial feed to a 100 ohm balanced twisted pair. The highest speed baluns I have seen for video are 270Mbps, which is standard definition. Unfortunately, this is a rather inefficient approach: a typ...
by PID_Stop
Wed Jan 12, 2011 12:54 pm
Forum: TV Engineering
Topic: 1855 versus 1694
Replies: 6
Views: 1700

Re: 1855 versus 1694

Like Eric, we use 1855A for reference and short (typically <25') HD-SDI runs between racks. Longer runs of HD-SDI, especially on lines fed by non-reclocking amplifiers, are 1694A. We have absolutely no problems with either cable. Also, both types work fairly well for analog NTSC: better response tha...
by PID_Stop
Tue Jan 11, 2011 1:07 pm
Forum: Ask the Engineers
Topic: Compression Conectors
Replies: 7
Views: 1210

Re: Compression Conectors

Seems most "PRO" video facilities still use the Kings three piece crimp BNC's. Any particular reason? We get the Kings connectors for $1.25 apiece; the best price I see on compression connectors is over $2. There isn't a lot of reason for us to spend the money to retool for a more expensive connect...
by PID_Stop
Thu Jan 06, 2011 1:10 pm
Forum: Production Studios
Topic: Wiring a new control room - SDI or Analog SDTV?
Replies: 19
Views: 8102

Re: Wiring a new control room - SDI or Analog SDTV?

When you wire a plant for SDI video, you have to use cable for SDI video, namely Belden 1694A. (For very short video runs, Belden 1505A works). So you build your plant, using 1694A cable, and it comes time for the next big project, going HD. Guess what? All that 1694A cable you ran, is also HD-SDI ...
by PID_Stop
Wed Jan 05, 2011 1:12 pm
Forum: Production Studios
Topic: Wiring a new control room - SDI or Analog SDTV?
Replies: 19
Views: 8102

Re: Wiring a new control room - SDI or Analog SDTV?

Now, that said, I *do* have a really nice set of HK-355 studio camera heads I'll be happy to sell you cheap. It doesn't seem that long ago that we replaced our General Electric PE-350s with Ikegami HK-323s... later replaced with LDK-20s, and now with JVC GY-HD250s. These new critters just look like...
by PID_Stop
Wed Jan 05, 2011 1:05 pm
Forum: Production Studios
Topic: Wiring a new control room - SDI or Analog SDTV?
Replies: 19
Views: 8102

Re: Wiring a new control room - SDI or Analog SDTV?

How do you zero-time SDI? Pretty much the same way you zero-time NTSC. Naturally, you need a waveform monitor with an SDI input. But timing SDI isn't nearly as critical as NTSC, because most clean switches have at least a half-line timing buffer. You can have an SDI source 20 microseconds off, and ...
by PID_Stop
Mon Jan 03, 2011 11:37 am
Forum: From the Trenches
Topic: I've heard of alternating current and direct current, but...
Replies: 7
Views: 3466

Re: I've heard of alternating current and direct current, bu

Just in case you're serious in not knowing... :-) Those are connectors (presumably; Kings is best known for their Triax connectors), which can carry current, but are not rated to "interrupt" it; this applies to circuit breakers as well; many should not be used as switches (though some people do), a...
by PID_Stop
Mon Jan 03, 2011 11:22 am
Forum: Production Studios
Topic: Wiring a new control room - SDI or Analog SDTV?
Replies: 19
Views: 8102

Re: Wiring a new control room - SDI or Analog SDTV?

1) SD-SDI is component video; you don't have NTSC issues like luminance detail beating against the color subcarrier to worry about, and the picture is noticeably better. 2) SD-SDI is inherently stable with respect to levels and phases: you will spend very little time tweaking, and the output of your...
by PID_Stop
Thu Dec 30, 2010 9:37 am
Forum: Digital Television
Topic: Low VHF Still Images
Replies: 4
Views: 1503

Re: Low VHF Still Images

Sure, you could use six megahertz of bandwidth to transmit still images... in fact, you could theoretically multiplex several dozen encoders each running at 500kb/s to feed your transmitter, and create the world's most expensive multi-stream digital picture frame. The lack of motion will indeed mask...
by PID_Stop
Wed Dec 29, 2010 10:45 am
Forum: From the Trenches
Topic: I've heard of alternating current and direct current, but...
Replies: 7
Views: 3466

I've heard of alternating current and direct current, but...

What kind of current is this?

Image

We have several thousand of these installed in our plant now, and I'm getting scared. :shock:

-- Jeff
by PID_Stop
Fri Dec 17, 2010 8:25 am
Forum: TV Engineering
Topic: Dont you hate it when Norton gets in the way of your Weather
Replies: 18
Views: 3067

Re: Dont you hate it when Norton gets in the way of your Wea

I will grant the downside to using Windows for air critical applications... but having a plant filled with a number of different and incompatible operating systems isn't necessarily an improvement. Also, even if I do manage to make a box work under an alternative OS, odds are that if we ever have to...