[opendtv] Re: Needle Pulse test pattern
- From: Mark Schubin <tvmark@xxxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 25 Oct 2005 13:28:56 -0400
Figure 1 of this recommended practice shows the BBC Pluge. The U.S.
version is just the three dark bars.
http://www.ebu.ch/CMSimages/en/tec_text_r23-1997_tcm6-4713.pdf
TTFN,
Mark
John Golitsis wrote:
>Yes..."modulated steps" would be the proper way to describe it.
>
>A better choice of patterns to ask about would probably be a standard
>BBC PLUGE pattern, which I believe has 5 steps?
>
>
>On 25-Oct-05, at 12:46 PM, Mark Schubin wrote:
>
>
>
>>Not sure what a "'standard' needle pulse test pattern" is. This web
>>site shows the standard NTC-7 composite test signal (go to the
>>bottom):
>>http://www.spectrum-soft.com/news/fall99/ntc7.shtm
>>
>>I suppose the 2T pulse can be considered a "needle." Are the
>>modulated
>>steps what you refer to as blocks?
>>
>>The FCC composite VITS signal is almost the same thing rearranged.
>>This
>>site lists almost all of the in-service insertion test signals:
>>http://www.tek.com/Measurement/cgi-bin/framed.pl?Document=/
>>Measurement/App_Notes/NTSC_Video_Msmt/
>>beyondbars.html&FrameSet=television
>>
>>TTFN,
>>Mark
>>
>>
>>
>>John Golitsis wrote:
>>
>>
>>
>>
>>>A "standard" needle pulse test pattern has a series of blocks in the
>>>center. I'm pretty sure I read once that the blocks are arranged
>>>with 100 IRE on the top, and then each successive block is half
>>>that. Can anyone confirm?
>>>
>>>
>>>
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