Here it is..........................2017...............yeah, forget that date! Besides, we are probably switching to a different grading system, that is less confusing, as it does not rely on one phase noise number, at a single frequency. (No, we are not going to explain it.
We get enough grief, as it is, from so-called "experts" who think phase noise below even 10 Hz is meaningless.
Let's just say it is a series of parameters, that need to be met, in order to get the highest grade.)
(The new method will be faster, and possibly less expensive! Mainly because the phase noise plot will be an option.)
We are able to supply NDK NZ2520SD clocks, at 22.5792 MHz and 24.576 MHz.
All units are burned in, for 24 hours, and the phase noise is measured. The phase noise measurement is supplied for each unit.
See our eBay listings, or inquire, as to price and availability.
The NDK NZ2502SD clocks have gotten some attention as "low noise", "low phase noise", and/or "low jitter". In general, they are good parts. But, like any other part of this nature, they are not 100%.
Yes, on any given reel, there good ones. Even some very good ones. Some that are just ok. And some that belong in the trash. Sorry, folks, that is the plain truth. Which is why several manufacturers pay us to buy pre-screened, and sorted, parts from us. Since we have a sufficient quantity on hand, we can offer these to parties that only need one or two of them. (Of course, if you are a manufacturer, we would love to add you as a customer.)
So, buying one, from any supplier, only guarantees you will get one that oscillates. If you want one that really lives up to the hype, well, we are probably the only place to buy one. But, your money, your choice. You can take your chances with some other supplier, of for about the same price, you can buy one that comes with proof of performance.
All of the units we sell will out-perform the more expensive Crystek CCHD-957. Even at our lower priced units. For those of you who demand the best, and are willing to spend roughly the same amount, we can supply units that are in vicinity of 15 dB better.
Yes, you read that right: 15 dB better.
So, you can buy an expensive competitor's brand, or......
Buy this brand, from someone else, with no proof of performance, or.............
Buy one, with proof of performance, from a company with a background in designing, building, and measuring, low phase noise clocks.
The choice is yours. We hope you make the right choice.
Folks have asked us if we really have parts that are "15 dB better than Crystek". We do. Here is proof:
Since Crystek does not supply data at 1 Hz, we have to extrapolate what it would be, from the data they do provide. (Of course, we have measured lots of them, so we know how close to the truth we are.) In any case, the above plot shows the best performance we have found from the NDK NZ2520SD parts. So, what are you waiting for? Buy some, now! (OK, not really "now". Someone just bought those 4, and we will not have not any more, until we complete another round of sorting, for one of our commercial customers. Which means there will not be any more until July, 2014. If we are all lucky.)
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