[opendtv] Needle Pulse
- From: "Hunold, Ken" <KRH@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Tue, 25 Oct 2005 14:43:03 -0400
What I know to be a needle pulse pattern has positive 100 IRE 2T pulse
on a black background for one half field and a negative 100 IRE 2T pulse
on a white background for the other half field, with both 2T pulses
occurring at the same point in the line. It was useful for checking the
power supply regulation on CRT displays (both direct-view and
projection.) If the black and white needles didn't stay straight at the
black/white background transition, then power supply regulation was
poor. It doesn't seem to have any similar unique use with plasmas, LCDs
and DLPs (but I'd love to learn about one.)
Regards,
Ken Hunold
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