I got a Meguro MJM-6350 CD jitter meter (MJM-6350 CD Jitter Meter / MEGURO ELECTRONICS CORPORATION). It is out of cal for 4 years now, I think that is not bad for a hobby meter 😀
I kind of figured out how it works, but I need more theoretical background to evaluate the readings I get...
This is how I use it (just to be clear, if I do it wrong 🙂)
So I measure the RF output of the laser amplifier, with a simple scope probe (1x attenuation) connected to the jitter meter input, I set the level range, and speed on the Meguro, and got a jitter reading.
-What is the difference between setting the level for 3T or 11T, as they give different readings which one is better what makes the difference?
-I can select the polarity of the measurement, to measure the falling or the rising edge, again it gives different readings, which is more important?
-Anyway, what is a good level of jitter for a CD 1X speed? I can toggle between 60 and 30 sigma ns (full range), I got mostly readings between 30 and 40 sigma ns, is that good, bad or avarage? What is considered very good, and what is very bad?
I kind of figured out how it works, but I need more theoretical background to evaluate the readings I get...
This is how I use it (just to be clear, if I do it wrong 🙂)
So I measure the RF output of the laser amplifier, with a simple scope probe (1x attenuation) connected to the jitter meter input, I set the level range, and speed on the Meguro, and got a jitter reading.
-What is the difference between setting the level for 3T or 11T, as they give different readings which one is better what makes the difference?
-I can select the polarity of the measurement, to measure the falling or the rising edge, again it gives different readings, which is more important?
-Anyway, what is a good level of jitter for a CD 1X speed? I can toggle between 60 and 30 sigma ns (full range), I got mostly readings between 30 and 40 sigma ns, is that good, bad or avarage? What is considered very good, and what is very bad?
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