[time-nuts] Chinese Scopes (was: Re: LORAN-C at MIT)

2012-04-16 Thread Marvin Gozum
At eevblog.com forum Chinese scopes are a daily discussion for over 3 years. In summary, in the = 100 MHz level they are very cost effective but there are better and worse. Rigol, Owon and Hantek are on par while Atten and Uni-T are consistently rated less. The criteria for rating them are

[time-nuts] Chinese Scopes (was: Re: LORAN-C at MIT)

2012-04-16 Thread Marvin Gozum
FWIW the 3000 series Agilents were rebadged Rigols. The newer entry levels to mid-range scopes are now all designed and built by Agilent in their Malaysia plant. At 08:00 04/16/2012, you wrote: -- Message: 1 Date: Mon, 16

Re: [time-nuts] Chinese Scopes (was: Re: LORAN-C at MIT)

2012-04-16 Thread Marvin Gozum
Alas, those are the UI issues I suggested in my post, fonts is one of them, there aren't any others in the 1000s series. You can change the 'skins' in the utility menu. Fonts are one advantage of Owon or Hantek, plus they offer larger LCDs. The flicker is from the slow sampling rate at

[time-nuts] Chinese Scopes

2012-04-16 Thread Marvin Gozum
Sorry john, that's more what I meant, by accuracy and precision I imply its faithful to the signal you choose to examine, free of artifacts induced by the scopes timebase or vertical amp, but with DSOs its limited by Nyquist sampling rules. Thus, sampling rate is as important a feature as a

Re: [time-nuts] Chinese credit card fraud

2012-03-16 Thread Marvin Gozum
This is the only reason I still have a Citibank card and so far, it hasn't been cracked. I've used it nearly 10 years. I can buy fearlessly from anyone, knowing 2 things about this number: It can be used just once It expires in 1 month http://en.wikipedia.org/wiki/Controlled_payment_number