Amusing Myself !-)

[Jim Thompson]

Amusing Myself with how simple certain things can be solved with a
circuit !-)

See "WonderWhatThisIsGoodFor.pdf" on the S.E.D/Schematics page of my
website.

...Jim Thompson

 

[John Jardine]

Amusing Myself with how simple certain things can be solved with a
circuit !-)

See "WonderWhatThisIsGoodFor.pdf" on the S.E.D/Schematics page of my
website.

...Jim Thompson

Looks to me like a complicated field sync generator for a TV. ?
regards
john

 

[Jim Thompson]

Amusing Myself with how simple certain things can be solved with a
circuit !-)

See "WonderWhatThisIsGoodFor.pdf" on the S.E.D/Schematics page of my
website.

...Jim Thompson

[snip]

Looks to me like a complicated field sync generator for a TV. ?
regards
john

Look more closely... the Input Signal is at the bottom of the page,
the output signal is at the top.

...Jim Thompson

 

[Dana Raymond]

I'm a little confused as to where the output is, but I'd say its either a
video scrambler or a descrambler. MUNGED looks like a scrambled signal in
that the horizontal sync pulse (front porch, sync tip, back porch, and
presumably color burst) are "pushed up" into the video field, but only for
the non-vertical sync portion of the field.

TV's cannot distinguish the horitonal sync from the video content, and that
results in 'tearing' of the image. However, its important that the field be
understood during the VITS interval so that the video decrambler can receive
the digital information on which channels to descramble.

The descramblers frequently use the stereo pilot (modified from 19KHz to
15750Hz (or so, I forget)), which is transmitted synchronous with the
horizontal sync from the original video feed and use it to "push down" the
horitontal sync back into place.

Am I Right? Do I win a prize!!! :~)
Dana

 

[Genome]

Amusing Myself with how simple certain things can be solved with a
circuit !-)

See "WonderWhatThisIsGoodFor.pdf" on the S.E.D/Schematics page of my
website.

...Jim Thompson

Since you don't tell us what it does it's good for nothing. That makes you a
crossposting troll. Congratulations.

Closest I can guess is it provides a trigger pulse for fields 1 or 5 on a
PAL/NTSC/SECAM system.

Pray And Learn
Never The Same Color (sic) Twice
Sometimes Even Colour Appears Momentarily

That's only because someone else designed one and I got to build it back
in..... oooh 1982 on a degree placement.. It wasn't a spice model and it
worked. It came with another bunch of stuff in CMOS that selected a
particular line from a particular field that triggered the thing that
recorded it.

Clever bloke, learnt some shit.

DNA

If you read my shit

 

[Jim Thompson]

Since you don't tell us what it does it's good for nothing. That makes you a
crossposting troll. Congratulations.

Closest I can guess is it provides a trigger pulse for fields 1 or 5 on a
PAL/NTSC/SECAM system.

Pray And Learn
Never The Same Color (sic) Twice
Sometimes Even Colour Appears Momentarily

That's only because someone else designed one and I got to build it back
in..... oooh 1982 on a degree placement.. It wasn't a spice model and it
worked. It came with another bunch of stuff in CMOS that selected a
particular line from a particular field that triggered the thing that
recorded it.

Clever bloke, learnt some shit.

DNA

If you read my shit

Rarely, you're generally so rude I think you must be French ;-)

The circuit extracts sync from a (Jerrold-style) suppressed sync
signal. Uses two one-shots and some gating. Once sync is found in
the (clean) VBI it know where to look thenceforth by suppressing the
garbage in the next ~63.5us, re-syncing the one-shots each line.

...Jim Thompson

 

[Genome]

Rarely, you're generally so rude I think you must be French ;-)

The circuit extracts sync from a (Jerrold-style) suppressed sync
signal. Uses two one-shots and some gating. Once sync is found in
the (clean) VBI it know where to look thenceforth by suppressing the
garbage in the next ~63.5us, re-syncing the one-shots each line.

...Jim Thompson

Didn't understand that so..... 'it's **** all use'.

Excellent. Where can I not buy one? :>)

DNA

 

[Dana Raymond]

So, I got it right then!
WooHoo!
Dana

 

[\(one of the\) Chris Evans]

PAL/NTSC/SECAM system.

Pray And Learn
Never The Same Color (sic) Twice
Sometimes Even Colour Appears Momentarily

I heard....

Pale And Lukewarm
No Two Similar Colours
Sickly European Colour Almost Monochrome

Chris

 

[Peter Bennett]

I heard....

Pale And Lukewarm
No Two Similar Colours
Sickly European Colour Almost Monochrome

Never Twice the Same Colour
System Essentially Contrary to the American Method
Perfection At Last

 

[Jim Thompson]

Should be between Water... and WWVB..., but I don't see it.

I pulled it as potentially illegal. Don't know why I had the urge to
post it in the first place.

...Jim Thompson

 

[Watson A.Name - Watt Sun]

Amusing Myself with how simple certain things can be solved with a
circuit !-)

See "WonderWhatThisIsGoodFor.pdf" on the S.E.D/Schematics page of my
website.

...Jim Thompson

Should be between Water... and WWVB..., but I don't see it.


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[Fred Bloggs]

I pulled it as potentially illegal. Don't know why I had the urge to
post it in the first place.

...Jim Thompson

Some eastern European is furiously at work making it into a kit for sale
by SPAM right now.........

 

[Jim Thompson]

Some eastern European is furiously at work making it into a kit for sale
by SPAM right now.........

Could be, but there's several required elements missing from the
"conceptual" representation that a non-EE would have real problems
with.

...Jim Thompson

 

[Mjolinor]

eastern European ................... work

Oxymoron