[time-nuts] Low-Cost Rubidium Performance

[Alberto di Bene]

On 2/9/2012 3:36 AM, John Ackermann N8UR wrote:
> As threatened, I've measured stability (out to a trustworthy 10K 
> seconds) and phase noise of the three popular telecom surplus Rb 
> standards.  I looked at two units of the FE-5680, two units of the 
> Efratom FRS, and one Datum LPRO.
Which variety of the FE-5680A did you measure ?
That with the output frequency adjustable in a wide range, with a master oscillator at 52..ish MHz,
or the latest one, derived from a 60 MHz oscillator, where you can just tweak the output frequency
with commands to the DDS ?

>From what I read in this group, they should have quite different phase noise performance.

73  Alberto  I2PHD