Re: [time-nuts] Symmetricom X72 interface boards

2017-12-06 Thread Jerry Hancock
What do I owe you? > On Dec 6, 2017, at 9:06 PM, Mark Sims wrote: > > The X72 rubidium oscillator interface board sets have (finally) been shipped > to everybody that paid for them. I had hoped to get them out a couple of > weeks ago, but ran into a couple of annoying

[time-nuts] Symmetricom X72 interface boards

2017-12-06 Thread Mark Sims
The X72 rubidium oscillator interface board sets have (finally) been shipped to everybody that paid for them. I had hoped to get them out a couple of weeks ago, but ran into a couple of annoying snags... First, the assembly house built a couple of test articles that were great and were

[time-nuts] HP-531xx counter calibrator boards

2017-12-06 Thread Mark Sims
The PCB's for the new (and hopefully improved) time interval calibrator board have shipped. They should be here early next week. The boards can do the Offset, Gain, and Fine time interval calibration steps in the HP 531xx calibration menu and replace the unobtainium HP-5-J06 time

[time-nuts] Spectrtime SRO100 rubidium oscillator

2017-12-06 Thread Mark Sims
I recently got in a Spectrtime SRO100 rubidium oscillator. It is a very small (2.75 x 4") Rb that runs on 11-19V. The firmware has the ability to discipline itself to a 1PPS input and can self-optimize the loop time constant depending upon the stability of the input PPS. I now have Lady

[time-nuts] Determining Allan Deviation From Interpolated Peak Frequency Readings

2017-12-06 Thread Mark Goldberg
I am making frequency measurements as described on the following pages: https://sites.google.com/site/perseusmods/ and https://sites.google.com/site/spectrumlabtesting/ using wide FFT bins and Spectrum Lab's peak frequency interpolation function. I would appreciate comments as to the

Re: [time-nuts] Helmholtz Resonator and other Maintained, Oscillators

2017-12-06 Thread Dr. Ulrich L. Rohde via time-nuts
Top presentation! 73 de Ulrich Sent from my iPhone > On Dec 6, 2017, at 1:47 PM, Joe Leikhim wrote: > > Great stuff. Helps understand Magnetrons, Injection locking, etc. Also love > those relaxation oscillators. > > -- > Joe Leikhim > > > Leikhim and Associates > >

Re: [time-nuts] Helmholtz Resonator and other Maintained, Oscillators

2017-12-06 Thread Joe Leikhim
Great stuff. Helps understand Magnetrons, Injection locking, etc. Also love those relaxation oscillators. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM ___