[time-nuts] 3GHZ Extender for HP 53131A and 53132A

Peter Gottlieb nerd at verizon.net
Fri Nov 8 21:07:24 EST 2013


Maybe he means fixed vs. automatic gain (or threshold)?  Perhaps a worry about 
picking up higher frequency noise on a lower frequency but larger signal you are 
looking to measure?

Peter


On 11/8/2013 8:38 PM, GandalfG8 at aol.com wrote:
> In a message dated 09/11/2013 01:30:14 GMT Standard Time,
> hmurray at megapathdsl.net writes:
>
>
> richard at karlquist.com said:
>> This high sensitivity is  probably a bad thing, not a good thing. It is
>> indicative of a dynamic  divider.  For a frequency counter prescaler, you
>> want a static  divider, such as the HP5386 used. Dynamic dividers make
> errors
>> if the  signal being measured has a broadband noise floor or sufficiently
>> high  spurs at any frequency.
> What do static and dynamic mean in that  context?  Is it the same as DRAM
> vs
> SRAM?  If so, I don't see  any obvious way that translates into one works
> and
> the other  doesn't.
> I wondered that.....
>   
> cc.ee.ntu.edu.tw/~jrilee/course/COMMIC08/CommIC_07.pdf
>   
> The MB510 looks to be a series of flip-flops so presumably would be
> classified as a static divider?
>   
> Regards
>   
> Nigel
> GM8PZR
>
>
>
>
>



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