Re: [time-nuts] Digital Phasae Lock Loops

I also knew Dr. Gardner in that time frame. I had the responsibility for the specification and procurement of the Saturn V com system. It included a phase locked turn around offset transponder for Doppler tracking. Also forward command and return telemetry. To gain some knowledge of phase locked

[time-nuts] Useful gadgets for DC power

If you are playing with DC power, I want to draw your attention to a company which makes some useful gadgets. For instance this one: http://www.mini-box.com/OpenUPS2 I havn't tried it yet, but it looks like a very convenient module for adding a small built-in UPS. (They have other

Re: [time-nuts] Digital Phasae Lock Loops

Martyn Smith wrote: > All we want to do is lock a 10 MHz ULN OXCO to a rubidium. > So basically a clean up loop. > Then we can provide an ULN output from the ULN OXCO and long term stability > from the rubidium. > The 10 MHz ULN OXCO has phase noise of –115 to -120 dBc/Hz @ 1 Hz with a –174 >

Re: [time-nuts] Digital Phasae Lock Loops

actually, that is a ketch 22, if the loop bandwidth is to low, you will have low noise , but it may will not lock at all, an other way to try to filter out the noise, also you may make the loop filter digital, but leave the the PLL analog, that could have the possibility to have the

Re: [time-nuts] Digital Phasae Lock Loops

On 10/17/15 6:17 AM, Alex Pummer wrote: actually, that is a ketch 22, if the loop bandwidth is to low, you will have low noise , but it may will not lock at all, an other way to try to filter out the noise, also you may make the loop filter digital, but leave the the PLL analog, that could have

Re: [time-nuts] Magellan GPS OEM 10 Channel -- Pinout & Docs

Hi, Yes, is difficult find any information, some time ago i try ask Magellan without any success. Direct attack on interface with oscilloscope is possibly best solution. Many thanks Mariusz On Fri, 16 Oct 2015 14:32:04 -0500, Gregory Beat wrote: > Mariusz - > > > > I

Re: [time-nuts] Digital Phasae Lock Loops

Quartzlock makes a couple of interesting digital PLL-modules, marketed specifically as ultra low noise cleanup loops. The datasheets contain a lot of interesting and useful information about the software architecture - not enough that *I* can recreate it, but perhaps someone more skilled than me

Re: [time-nuts] Digital Phasae Lock Loops

Hi, On 10/17/2015 01:57 PM, Tom Van Baak wrote: Martyn Smith wrote: All we want to do is lock a 10 MHz ULN OXCO to a rubidium. So basically a clean up loop. Then we can provide an ULN output from the ULN OXCO and long term stability from the rubidium. The 10 MHz ULN OXCO has phase noise of