16.9344MHz LOW JITTER CLOCK KIT... - Page 2 - diyAudio
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Old 23rd March 2009, 11:24 PM   #11
poynton is offline poynton  United Kingdom
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That transformer will do the job although a small toroidal version may be better.


Andy
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Old 24th March 2009, 01:36 AM   #12
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As poynton said that small transformer should do the job... cheap toroidals will probably have no benefit over a standard transformer so bear that in mind...

The transformer I salvaged is perfectly fine and still working... woohoo! The clock oscillator circuit can't be drawing anywhere near what the transformer can give out so it should last for years to come without a hitch!

By the way, I've bought two LM4562 op amps from Farnell and have had them lying about a couple of weeks waiting to fire them into my CD-63SE (in place of the original NJM2114s)... do I just remove the NJM2114s and drop in the new op amps? All this talk of resistors and biasing into Class A... well, I'm confused, what's the reason/benefits?
Also, I like the sound of the CD-63SE as it is just now, and I'm guessing it's partly down to the HDAM. After putting the LM4562s in should I disable the HDAM straight off or is it worth listening with the HDAM in place?

Thanks
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Old 24th March 2009, 01:38 AM   #13
.45 GAP is offline .45 GAP  United States
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Andy, link please

thanks for the help
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Old 24th March 2009, 03:32 AM   #14
.45 GAP is offline .45 GAP  United States
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thanks bleacher

you guys have any tips for installing the clock?

from what I can tell in the player one lead on the clock goes to one capacitor, the other lead goes to another capacitor, both of the other sides of the caps go to ground, from the 2 clock lead sides of the caps they each go to one side of a single resistor

so I remove the caps, tie the 2 ground sides of the caps together and that is my ground, I then remove the resistor and try each each of the clock leads to see which works

does that sound right?

thanks
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Old 24th March 2009, 05:05 AM   #15
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Default Jitter = phase Noise

Dear oscillator researchers

clock deviation ..... +/-1ppm, = not jitter
clock purity.............C/N, phase noise,-130dBc@100Hz = Jitter

I measured several crystal oscillator's Phase Noise with hp E5501B.
Attached file is LcAudio XO-3 jitter.
It is very nice jiter than usual SPXO and TCXO oscillators.


Crystal oscillator produces undesirable phase noise near the output frequency.
@Phase noise is measured in the frequency domain, and is expressed as a ratio of signal power to noise power measured in a 1 Hz,10Hz,100Hz,1000Hz, bandwidth at a given offset from the desired signal.
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Old 24th March 2009, 05:39 AM   #16
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Default Is this clock low jitter?

This is one of SACD clock, that product company called High accuracy master clock oscillator, to suppress jitter & noise.
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Old 24th March 2009, 05:56 AM   #17
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Default Re: Is this clock low jitter?

Quote:
Originally posted by nagaesan
Dear oscillator researchers

clock deviation ..... +/-1ppm, = not jitter
clock purity.............C/N, phase noise,-130dBc@100Hz = Jitter

I measured several crystal oscillator's Phase Noise with hp E5501B.
Attached file is LcAudio XO-3 jitter.
It is very nice jiter than usual SPXO and TCXO oscillators.


Crystal oscillator produces undesirable phase noise near the output frequency.
@Phase noise is measured in the frequency domain, and is expressed as a ratio of signal power to noise power measured in a 1 Hz,10Hz,100Hz,1000Hz, bandwidth at a given offset from the desired signal.

Quote:
Originally posted by nagaesan
This is one of SACD clock, that product company called High accuracy master clock oscillator, to suppress jitter & noise.

XO3 has respectable jitter level at IMPORTANT band between 10Hz and 100Hz.

The one used in SACD player is pretty much useless and good for nothing at all!!!

Boky
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Old 24th March 2009, 05:59 AM   #18
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Default I orderd low jitter colpitts oscillator

X'tal oscillator case size is DIP14pin, compatible that SACD player's clock.

Power unit is independent SACD module PCB.
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Old 24th March 2009, 06:02 AM   #19
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Hi nagaesan,

Are Yokohama tires actually being made in your city?

Boky
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Old 24th March 2009, 06:09 AM   #20
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Default Re: I orderd low jitter colpitts oscillator

Quote:
Originally posted by nagaesan
X'tal oscillator case size is DIP14pin, compatible that SACD player's clock.

Power unit is independent SACD module PCB.

That clock oscillator looks good - same as XO3 (!!!) Make sure that you use a separate, very low noise power supply.

There is another important thing to consider and implement: ground the whole power supply / clock oscillator combination only at one point on the main PCB - find the one with the lowest noise (hint: it is far away from the microprocessor chip!)

Good luck,

Boky
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