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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi All<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I attach the relevant detail from the AVR2
theory of operation,.which nearly agrees with you. Hope it helps.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Kind Regards <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 color=navy face="Arial Rounded MT Bold"><span
lang=EN-GB style='font-size:12.0pt;font-family:"Arial Rounded MT Bold";
color:navy'>David Dean<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Arial Rounded MT Bold"><span
lang=EN-GB style='font-size:12.0pt;font-family:"Arial Rounded MT Bold";
color:navy'>Westpoint Television</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Arial Rounded MT Bold"><span
lang=EN-GB style='font-size:12.0pt;font-family:"Arial Rounded MT Bold";
color:navy'>Now with Snell Shakeout</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Arial Rounded MT Bold"><span
lang=EN-GB style='font-size:12.0pt;font-family:"Arial Rounded MT Bold";
color:navy'>0208 742 3400<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> QuadList
[mailto:quadlist-bounces@quadvideotapegroup.com] <b><span style='font-weight:
bold'>On Behalf Of </span></b>chill315@aol.com<br>
<b><span style='font-weight:bold'>Sent:</span></b> 22 November 2013 17:13<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Quad
List</st1:PersonName>; ted@flashscan8.us<br>
<b><span style='font-weight:bold'>Subject:</span></b> [QuadList] Fwd: FM
standards in 525 and 625</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
Chris Hill<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
Begin forwarded message:<o:p></o:p></span></font></p>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-weight:bold'>From:</span></font></b>
<a href="mailto:Chill315@aol.com">Chill315@aol.com</a><br>
<b><span style='font-weight:bold'>Date:</span></b> November 21, 2013 at 9:36:32
PM EST<br>
<b><span style='font-weight:bold'>To:</span></b> <a
href="mailto:quadlist@quadvideotapegroup.com">quadlist@quadvideotapegroup.com</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> <b><span
style='font-weight:bold'>FM standards in 525 and 625</span></b><o:p></o:p></p>
</div>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
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<div>
<p class=MsoNormal><font size=2 color=black face=Arial id="role_document"><span
style='font-size:10.0pt;font-family:Arial;color:black'>I just hung up the phone
with Ted Langfell, our illustrious secretary. We are having a discussion
about the standards used for recording signals on a quad. This came about
because a manual for an AVR-1 had a frequency for blanking different than a
VR-1200 manual. He believes it was 5.3 vs 5.6 MHz. He is driving so
can not check the email. <o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>So here is the research that I did
while on the phone. I continued after we hung up. Both RCA and
Ampex tell us that they conform to the SMPTE and EBU standards. The
referenced standards are SMPTE RP-6 for Modulation Levels. The RP-10
standard describes the Signal Specifications. The 625 system conforms to
CCIR Document DOC. X/27E-3 as set forth from the EBU.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>525 Low band mono is from 4.28 for sync
tip, 5.0 for Blanking, and 6.8 for peak white. Pre / post emphasis
is 4 db at 4 MHz.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>525 Low Band Color is from 5.5 for Sync,
5.79 for Blanking, and 6.5 for peak white. Pre / post emphasis
is 9.54 db at 4 MHz.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>625 low band is sync tip at 5.0, 5.54 for
blanking, and peak white at 6.8 MHz. Unknown emphasis curve. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I did a math solution and came up with
5.54 MHz for the blanking. This was based upon a linear
relationship based upon the .7 to .3 ratio of video and sync as
published by Ampex. This is the specification that is in question. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>But the top frequency is for PEAK
WHITE. does that mean over 100 units of video? If not, how
much? If 120 video plus sync, then blanking is lower in
frequency. An interesting math problem. And a good
discussion. Also the modulators clamp at Blanking so in reality the
deviation is kind of controlled by the video level alone.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>525 High band is 7.06 for sync. 7.9 for
blanking, and 10.0 for peak white.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>625 High Band is 7.16 for sync. 7.8 for
blanking, and 9.3 for peak white.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Super High Band is 9.2 for sync and 12.2
for peak white.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>All information is from VR-1200 and TR-4
manuals. I also referred to Ennes's book on VTR theory.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>So what is the reason for the
discrepancy? A misprint? The sales literature does not list the
frequencies. Or was there a change by the EBU or SMPTE in the standard
after the design of the AVR-1?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>As a side note, we know that there were
different standards when both AMPEX and RCA first introduced the
machines. That is why there was a special setting on the TRT series
demod's that allowed you to screwdriver adjust the curve to get proper
playback. This also appears on the TR-22 and other low band quads from
RCA. The standards were settled early on by the SMPTE as the governing
body. Both RCA and AMPEX licensed each other so that the machines would
be compatible. So if one developed a new standard, the other had to adopt
it for conformity. We did not need the Beta vs VHS was in broadcasting
quads.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Chris Hill<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> <o:p></o:p></span></font></p>
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