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<DIV><FONT face=Arial>Interesting you should make a post about Shinybow
products...</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I was considering their NTSC> PAL standards converter
for some basic conversion from an NTSC s-video camera signal to a PAL
system.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>However, seeing that its in the somewhat lower end of the
market i wondered how well it performed this conversion as if it introduced
dropped frames as its method of conversion resulting in jerky video</FONT></DIV>
<DIV><FONT face=Arial>then it would not be suitable for the job, emailing them
to see if they had a demo video or could explain what method it uses to convert,
they couldnt answer</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Perhaps someone could reccomend a decent but lowest priced
converter that does the job without noticable dropped frames or jerky
motion</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>James</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=saburgess@btinternet.com href="mailto:saburgess@btinternet.com">Steve
Burgess</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=quadlist@quadvideotapegroup.com
href="mailto:quadlist@quadvideotapegroup.com">quadlist@quadvideotapegroup.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, June 25, 2014 9:30
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [QuadList] Shinybow SG-3680
RGB-to-CVBS, Y/C Converter Funny</DIV>
<DIV><BR></DIV><BR>
<P>
<HR>
<P></P>
<DIV dir=ltr>
<DIV style="FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: 12pt">
<DIV>Hi folks</DIV>
<DIV> </DIV>
<DIV>Attached are pics of both sides of the (rather nice) PCB for this
eBay.co.uk-sourced SB-3680 RGB-to-CVBS, Y/C converter (serial:
20048001106).</DIV>
<DIV> </DIV>
<DIV>It uses a KA2198BD encoder chip wired for PAL operation (pin 7 grounded)
and a 4.43MHz crystal oscillator employing a Schmitt-trigger inverter.</DIV>
<DIV> </DIV>
<DIV>Inspection reveals that R1 and C5 are not fitted, which means the 4.43MHz
subcarrier is not reaching pin 6 of the KA2198BD – so no wonder I am having
problems with the chroma output.</DIV>
<DIV> </DIV>
<DIV>Also, the KA2198BD datasheet says that for PAL the components connected
to pin 17 should be 82uH and 15pF whereas 100uH and an unmarked capacitor are
actually fitted; if the capacitor is 20pF, these values are what the datasheet
says should be fitted for NTSC operation.</DIV>
<DIV> </DIV>
<DIV>Weird.</DIV>
<DIV> </DIV>
<DIV>eBay seller swears blind it was working ok but decided not to return as
paid next-to-nothing for it and was curious to get to the root of the
problem. I’ve e-mailed Shinybow in Taiwan.</DIV>
<DIV> </DIV>
<DIV>Steve Burgess</DIV>
<DIV>retired, ex-BBC/Channel 4 UK</DIV></DIV></DIV>
<P>
<HR>
<P></P>______________________________________________<BR>Please trim posts to
relevant info when replying.<BR><BR>Change subject to reflect thread
direction.
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