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

[Richard Karlquist]

On 2013-11-08 15:49, GandalfG8 at aol.com wrote:

> 
> At 1000 MHz, the highest frequency I can generate right now, I've  
> measured
> the channel 3 input sensitivity as -50dBm with a sinusoidal  signal.
> 
> Regards
> 
> Nigel
> GM8PZR
> 

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.

Rick Karlquist N6RK