Posted by Martin Underwood on 10/27/06 21:05

Frank wrote in
54s4k25p8sb949bihlddfpp2c8669nap1h@4ax.com:

> On Sat, 28 Oct 2006 00:09:41 +1300, in 'rec.video.production',
> in article <Re: Question about SECAM and Subcarriers>,
> Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> wrote:
>
>> In message <egfhm5$1t5$1$8300dec7@news.demon.co.uk>, Stephen wrote:
>>
>>> All these frequencies arise from the original 625-line variant of
>>> the NTSC colour system (which was never actually used). 625 line
>>> NTSC had a colour subcarrier frequency of 4.4296875 MHz or 283.5
>>> times line frequency.
>>
>> Is that what was called "NTSC 4.43"? Many VCRs sold in PAL countries
>> used to have an "NTSC playback on PAL TV" feature, which hacked the
>> signal coming off an NTSC tape to make it look more like a PAL
>> signal. It was still 525 lines and 60 fields per second, but the
>> colour information was (re)encoded into PAL-compatible form.
>
> NTSC 4.43 places the subcarrier at 4.43 MHz instead of the usual 3.58
> MHz. I have an old Sony production monitor here which supports NTSC
> 4.43. It's a U.S. model, so it's got a SMPTE C phosphor rather than an
> EBU phosphor.

Don't PAL VCRs *still* produce NTSC 4.43 when playing an NTSC tape? Or do
modern VCRs produce genuine NTSC (3.58) which modern TVs are expected to be
able to sync with?

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