Re: [time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

2016-07-10 Thread timeok
See also: http://www.timeok.it/wp-content/uploads/2015/08/high-performance-frequency-doublerv1-31.pdf Luciano www.timeok.it From: "time-nuts" time-nuts-boun...@febo.com To: time-nuts@febo.com Cc: Date: Sat, 9 Jul 2016 17:57:57 -0400 Subject: Re: [time-nuts] Does doubling a frequ

Re: [time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

2016-07-09 Thread Charles Steinmetz
David wrote: Thanks for the reminder about this... it will neatly solve a problem I have at hand. Can you advise which core you used for the transformer? If you mean the quadrature hybrid, I use an FT37-61 toroid core. One of the smaller Mix 61 balun cores should also work, but with the

Re: [time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

2016-07-09 Thread davidh
Charles, Thanks for the reminder about this... it will neatly solve a problem I have at hand. Can you advise which core you used for the transformer? Thanks, david On 10/07/2016 07:57, Charles Steinmetz wrote: James wrote: Is there a preferred frequency doubler circuit which would do

Re: [time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

2016-07-09 Thread Charles Steinmetz
James wrote: Is there a preferred frequency doubler circuit which would do the least harm to the ADEV of the oscillator? The signal can be a square wave and does not need to be a sine wave. Thanks. Jim Robbins A quadrature-fed DBM produces the lowest jitter and noise. My implementation

Re: [time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

2016-07-09 Thread Bob Camp
Hi The simple answer is that most doublers that are ok for phase noise will not degrade ADEV. The issues with ADEV come when your doubler is out in a changing environment and your oscillator is not ( = it’s an OCXO). The answer to that problem is pretty simple if you have an issue … ovenize

[time-nuts] Does doubling a frequency alter the original ADEV of the frequency?

2016-07-09 Thread James Robbins
Would doubling the frequency of a 5 MHz oscillator to 10 MHz affect (or degrade) the natural ADEV of the 5 MHz oscillator? If so, how does it affect the original ADEV? Is there a preferred frequency doubler circuit which would do the least harm to the ADEV of the oscillator? The signal can