[opendtv] Re: Needle Pulse test pattern
- From: John Golitsis <john@xxxxxxxxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 25 Oct 2005 13:16:23 -0400
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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