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David Ashton
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Re: Fun
David Ashton   7/3/2014 4:23:01 PM
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@Andrewier....Thanks for that, very well put, I'd forgotten about VGAs.  I guess there  is some sense to it.   Are you sure about DB-31 - I remember seeing a high denisty plug the sdame size as a DB-25 but (like a VGA) with 3 rows of pins, but there would have been a lot more than 31 there....

Andrewier
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Re: Fun
Andrewier   7/3/2014 3:06:00 PM
@David Ashton

I am not sure if we are talking about the same (or my bad English is tricking me), but... let it go:

If the matter is DB x DE connector designations, the first letter (D) is for 'D' type (or trapezoidal), second - A,B...E is for shell size and the number, for the number of pins, of course. For example, we can have DB25 and DB31 - same shell size but different number of pins. The same for the - once ubiquitous - DE9 (PC serial port) and DE15 (aka VGA) .

Regards,

AW.

 

speff
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Re: Fun
speff   6/30/2014 12:32:45 PM
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Got them all- I guess I must be an instrument guy. LOL.

I'm not convinced you can't use type B below 0°C but it has a nasty hook around there where it reverses slope, so a given mV can map to more than one temperature, and nobody that I've seen has bothered to measure the mV below 0°C (the only reason to use such a nasty Pt-Rh thermocouple is if you have to go up to very high temperatures (>1500°C)).

Measurement.Blues
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Re: Fun
Measurement.Blues   6/27/2014 11:10:51 AM
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Sheetal (and everyone else).

I used up my one and only set of questions that were already done. I will tyr to run them one in awhile and perhaps you can help. Please send questions to me at martin.rowe@ubm.com. I'll compile them and post.

David Ashton
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Re: Fun
David Ashton   6/27/2014 6:40:08 AM
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Thanks as always Martin.  Got 3/5 - came short on the language one and no 5.  Should have known better on this one as I have come across it before.  Silly idea though, if they have a unique letter, what's the point of putting the number?

Sheetal.Pandey
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Fun
Sheetal.Pandey   6/27/2014 4:57:00 AM
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I tried answering all the questions. Enjoyed short and seet. Got few of them correct. This is nice. May be we can have these coming on every fridays...good learning.

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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