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Old 24th March 2009, 07:20 AM   #21
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Default Capacitor of voltage regulator

If we change capacitor of voltage regulator, also phase noise characteristic was change.

I choice SANYO OS caps.
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Old 24th March 2009, 07:28 AM   #22
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Default YOKOHAMA Tire co.,ltd

Hello Extreme_Boky,

YOKOHAMA Tire Co.,LTD headquarters place TOKYO.


This is my car tire, that YOKOHAMA DNA S-Drive 225/45,245/45/R18
http://minkara.carview.co.jp/userid/...266/parts.aspx

http://minkara.carview.co.jp/userid/...4/profile.aspx
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Old 24th March 2009, 07:32 AM   #23
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OSCON's are good, aren't they...

They can feed the noise from Vcc to the ground (common) plane, and they do excellent job.

Now, please consider what will happen if you lower the noise OF THE COMMON (GROUND PLANE) and you keep the OSCONS?

This is why I recommended to ground the oscillator to the SACD PCB ground plane with the least amount of noise.

Regards,
Boky
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Old 24th March 2009, 07:34 AM   #24
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Location: Sydney
Default Re: YOKOHAMA Tire co.,ltd

Quote:
Originally posted by nagaesan
Hello Extreme_Boky,

YOKOHAMA Tire Co.,LTD headquarters place TOKYO.


This is my car tire, that YOKOHAMA DNA S-Drive 225/45,245/45/R18
http://minkara.carview.co.jp/userid/...266/parts.aspx

http://minkara.carview.co.jp/userid/...4/profile.aspx

Beautiful car with very nice tires...

Cheers,
Boky
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Old 24th March 2009, 07:58 AM   #25
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Default XO3 is good C/N but +/-5ppm deviation

Let's stop minding clock deviation +/- 1ppm or not.
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Old 24th March 2009, 08:10 AM   #26
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Default OS cap Low ESR

SANYO OS-CON is very low ESR and good frequency characteristics.

http://www.edc.sanyo.com/english/pr...n/download.html
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Old 24th March 2009, 08:17 AM   #27
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Location: Sydney
Default Re: XO3 is good C/N but +/-5ppm deviation

Quote:
Originally posted by nagaesan
Let's stop minding clock deviation +/- 1ppm or not.

parts per million deviation is not that important; the important thing to know (or measure if you have the equipment that can do it) is jitter performance at around 10Hz.

5 PPM means that you will either LOOSE or GAIN for example 5 seconds in approximately 11 days' period (Wikipedia), and this is not important for us at all - AS LONG AS THOSE seconds "keep coming" at exactly the same intervals.



Boky
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Old 24th March 2009, 08:19 AM   #28
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Default This is XO3 schematic

Let's refer to low JITTER good C/N clock schamatic.
(It is different my original clock unit)

http://www.lcaudio.com/images/LClock/xo3dias.gif
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Old 24th March 2009, 08:27 AM   #29
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Yes, the amount of jitter at around 10Hz will directly affect the timing of our clock signal, and our ears are very sensitive (actually, our brain!) to these variations.

The lower the power supply noise - the lower the jitter - hence - lower disturbance and more accurate timing of our clock signal.

Some prefer sine wave output, some square wave... it is academic...but I am sure many would discuss this topic to the Nth degree.

Boky
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Old 24th March 2009, 08:34 AM   #30
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Default Let's stop minding clock deviation +/- 1ppm or not.

This is pre-production model for commentator & reputator sound check.

SACD decorder module frequency is 33.868800MHz.
But this was 33.868000MHz clock.


Because, even if 800Hz (23.62ppm) slipped, people did not notice it.
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