Re: [time-nuts] Symmetricom Syncserver S300

Bob like you I did some hunting and believe I ran across the same details on the supply. There is a good thread on the S200 complete withinternal pix and a link to download the OS image. Just in case the image is corrupt. No idea if S200 software can be used in a S300 but its a 512 MB SD flash card

Re: [time-nuts] USB over optical fiber

On 12/6/19 9:10 AM, Dana Whitlow wrote: Even without any funny business with boost converters (or whatever). those copper wires make a nice antenna for coupling noise from both ends (PC and USB accessory) into the environment inside the chamber. Unless, of course, the cable is well-shielded, whi

Re: [time-nuts] 88Sr+ ion-clock live stream

On 12/6/19 7:39 AM, Anders Wallin wrote: Hi all, you may find our live-stream from the lab amusing: https://www.youtube.com/watch?v=z9VFbs4FogY The central bright dot is fluorescence at 422nm from laser cooling a single trapped 88Sr+ ion. The ion emits about 1e7 photons/s at most and we currentl

Re: [time-nuts] USB over optical fiber

It's not shielded, and ferrites are pretty useless down here. I did try, but the ferrites I have did nothing. My backup plan arrives supposedly in the next 2 hours -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO  80301 USA phone: 303-4

Re: [time-nuts] 88Sr+ ion-clock live stream

Cool !!! > On Dec 6, 2019, at 10:39 AM, Anders Wallin > wrote: > > Hi all, you may find our live-stream from the lab amusing: > https://www.youtube.com/watch?v=z9VFbs4FogY > > The central bright dot is fluorescence at 422nm from laser cooling a single > trapped 88Sr+ ion. The ion emits about 1

Re: [time-nuts] USB over optical fiber

Even without any funny business with boost converters (or whatever). those copper wires make a nice antenna for coupling noise from both ends (PC and USB accessory) into the environment inside the chamber. Unless, of course, the cable is well-shielded, which you did not mention. I suppose it's to

[time-nuts] 88Sr+ ion-clock live stream

Hi all, you may find our live-stream from the lab amusing: https://www.youtube.com/watch?v=z9VFbs4FogY The central bright dot is fluorescence at 422nm from laser cooling a single trapped 88Sr+ ion. The ion emits about 1e7 photons/s at most and we currently detect about 500 of those in a 20ms detec

Re: [time-nuts] USB over optical fiber

This is my backup plan: https://industrialcomponent.com/opticis/opm210003.html The docs are a bit chinglish, but I'm encouraged by the fact that the distal end needs external power. I was hoping the corning one was powering the distal end by CW laser of maybe 200mW with data carried on other w

Re: [time-nuts] USB over optical fiber

Well, it arrived, and it is NOISY. ☹ It's pushing out longitudinal noise along the cable, and it's deafening my receiver. After doing some research this morning, it appears that they do the DATA optically but power is taken on copper wires, and I'm betting a boost switcher to compensate for th

Re: [time-nuts] USB over optical fiber

It might pass class A or even B, but it totally obliterates the signals I'm looking for down at 457kHz. The noise is pumped longitudinally along the "optical cable" and the metallic one to the product, which pretty much confirms a boost or flyback regulator making up for the voltage drop in the

Re: [time-nuts] USB over optical fiber

Wow, cost cutting at work I have the corning one but its 3 years old Remember when FCC certification meant something for EMC > On Dec 6, 2019, at 3:21 PM, David Van Horn > wrote: > Well, it arrived, and it is NOISY. ☹ It's pushing out longitudinal noise along the cable, and it's deafe