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 Post subject: Marconi
PostPosted: Sun Feb 17, 2008 4:04 pm 
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Joined: Fri Aug 03, 2007 8:25 am
Posts: 12
"This means the clock is VERY fast, leaving very little time to introduce jitter and noise............"

Very Fast as in very fast rise times and fall times.

Why? Finite rise times introduce "decision moment" inaccuracies. In your DAC, ADC, SRC. Decision inaccuracies are timing errors, is jitter.

Inform yourself: it's all over the internet.

Here are some examples, read them but don't stop there.
http://www.tek.com/Measurement/scopes/j ... 6146_1.pdf
http://www.lavryengineering.com/white_papers/jitter.pdf

>30 years RF design experience? yeah sure. All sinewave experience.

We're talking square wave stuff here: <2ns rise times, no ringing, no overshoot, ground bounce, power supply feedback, EMC, etc etc. Quite another league. Communications engineers league. Guys 'n gals who have to pass 100's of MB/s across a two wire system. They know the drill.

Jocko, stop bashing and start being intelligent.
You're your own worst enemy. No wonder you were banned from other fora.

Why not somebody try a host of devices like this in a decent cdplayer and report what he's experiencing?
Now THAT would be an informed post.

And a better pastime activity than rearing your ugly head on the internet, and making no friends.


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PostPosted: Sun Feb 17, 2008 4:47 pm 
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Board jester
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Joined: Mon Dec 13, 2004 3:08 pm
Posts: 2042
marconi wrote:
"This means the clock is VERY fast, leaving very little time to introduce jitter and noise............"

Very Fast as in very fast rise times and fall times.

Why? Finite rise times introduce "decision moment" inaccuracies. In your DAC, ADC, SRC. Decision inaccuracies are timing errors, is jitter.

Inform yourself: it's all over the internet.

Here are some examples, read them but don't stop there.
http://www.tek.com/Measurement/scopes/j ... 6146_1.pdf
http://www.lavryengineering.com/white_papers/jitter.pdf

>30 years RF design experience? yeah sure. All sinewave experience.

We're talking square wave stuff here: <2ns rise times, no ringing, no overshoot, ground bounce, power supply feedback, EMC, etc etc. Quite another league. Communications engineers league. Guys 'n gals who have to pass 100's of MB/s across a two wire system. They know the drill.

Jocko, stop bashing and start being intelligent.
You're your own worst enemy. No wonder you were banned from other fora.

Why not somebody try a host of devices like this in a decent cdplayer and report what he's experiencing?
Now THAT would be an informed post.

And a better pastime activity than rearing your ugly head on the internet, and making no friends.

What?
Actually I tried the Tent clock, the LCaudio-2 and the Netaudio clock ands some Chinese clock, forgot the name.... in my CDP.
I also tried the Tent with Vacuum State PS, the LCaudio and my own KC8 45 MHz in a Sony SCD1 SACD player....

Your rude tone is even against the rules here on this forum!

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Elso


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 Post subject:
PostPosted: Sun Feb 17, 2008 10:49 pm 
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Dog
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Joined: Tue Dec 14, 2004 12:26 pm
Posts: 4981
Location: Lisbon, Portugal
Mr. Marconi (!) can you stick to the technical stuff and leave the personal attacks outa here?
It's easy to register in a forum with a Marconi username and start bashing.
That's a shame, please respect the memory of that great man.

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Carlos Filipe

"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius - and a lot of courage - to move in the opposite direction." Albert Einstein


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