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

[paul swed]

Interesting read but have not figured out the MIT loran thread part of the
header. This is about chinese scopes

On Mon, Apr 16, 2012 at 2:27 PM, John Ackermann N8UR <jra at febo.com> wrote:

> On 4/16/2012 1:47 PM, Marvin Gozum wrote:
>
>> 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
>> measurement accuracy and precision, UI, construction quality and tech
>> support.
>>
>> Prices vary depending on country, and local support varies.  Those
>> differences will help you choose between the better 3 brands.
>>
>> Rigol is consistent in quality all around, but cost more than the others.
>>  Rigol is the only maker with scopes that compete with Agilent or Tek, in
>> the 1-4 GHz level.  Support is mostly via the sellers.  In the USA, Rigol
>> has a subsidiary that provides responsive support.
>>
>> Owon and Hantek offer larger screens, more features and better GUI, but
>> can be plagued with construction flaws.  Its acceptable if your seller will
>> exchange any defective units you purhcase.  Owon has provided tech and
>> hardware support directly from China, including spares.
>>
>> Atten and Uni-T glitches are concerning, as they tend to provide erratic
>> measurement.
>>
>
> I got one of the 50MHz Rigol scopes last year as a "toss in" when I bought
> one of their arbs.
>
> It works well, but one thing that annoys me is a flicker on the screen at
> fast (less than a few microsecond) sweep speeds.  I emailed Rigol US about
> it, but never had a response so don't know if it's normal or not.  My Tek
> 2012 (almost identical form factor as the Rigol, by the way) doesn't show
> the flicker.
>
> The other notable thing about the Rigol is that the on-screen text uses
> that not-very-attractive, Times Roman-ish, serif font that seems ubiquitous
> in Chinese documentation.  Anyone know why they use that versus something
> more pleasant on the eyes?
>
> John
>
>
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