[time-nuts] Are the days of buying a crystal numbered?
Hi All, Found this interesting device last week while looking for a basic PLL to replace a crystal for an IF offset. Has anyone experimented with the si570/si571 yet? www.silabs.com/Support%20Documents/TechnicalDocs/ http://www.silabs.com/Support%20Documents/TechnicalDocs/Si570.pdf Si570.pdf Regards Gerald VK3GJM ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Are the days of buying a crystal numbered?
I built a kit and found that it wanders 50 Hz at 10MHz. http://www.cliftonlaboratories.com/si570_kit_from_k5bcq.htm Found this interesting device last week while looking for a basic PLL to replace a crystal for an IF offset. Has anyone experimented with the si570/si571 yet? www.silabs.com/Support%20Documents/TechnicalDocs/ http://www.silabs.com/Support%20Documents/TechnicalDocs/Si570.pdf Si570.pdf Regards Gerald VK3GJM -- Raj, VU2ZAP Bangalore, India. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Are the days of buying a crystal numbered?
It's a very good device. Used in 1000's of Softrock SDR's arround the world now. Control software (by various means, including USB) can be found courtesy of the Softrock40 group, on Yahoo. http://groups.yahoo.com/group/softrock40/ 73. Dave G0WBX. -- Message: 6 Date: Mon, 22 Feb 2010 21:59:44 +1100 From: Gerald Molenkamp gera...@commtelns.com Subject: [time-nuts] Are the days of buying a crystal numbered? To: time-nuts@febo.com Message-ID: 50d403a38069bf4196f41887738c03ee544...@companyweb Content-Type: text/plain; charset=us-ascii Hi All, Found this interesting device last week while looking for a basic PLL to replace a crystal for an IF offset. Has anyone experimented with the si570/si571 yet? www.silabs.com/Support%20Documents/TechnicalDocs/ http://www.silabs.com/Support%20Documents/TechnicalDocs/Si570.pdf Si570.pdf Regards Gerald VK3GJM ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Are the days of buying a crystal numbered?
Anybody know what its performance is like under vibration? Henry On Mon, Feb 22, 2010 at 5:32 AM, Marco IK1ODO -2 ik1...@spin-it.com wrote: There are several kits around using the Si570 serires of oscillators. I built the FA-SY and it's very nice: http://www.funkamateur.de/download-files/dl1fac_FA-SY-Umbau.pdf FA-SY includes a program to trum the frequency, and a simple oven to heat the oscillator. It stays in some parts in 10^9, and is spectrally very clean. I expected it to be much worse :-) - I may post some plots, if anyone is interested. Then see http://www.mydarc.de/dg8saq/SI570/index.shtml and http://www.sdr-kits.net/USB/USB_Description.html 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Henry Hallam Sent from my Laptop ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Are the days of buying a crystal numbered?
From: Henry Hallam he...@pericynthion.org Subject: Re: [time-nuts] Are the days of buying a crystal numbered? Anybody know what its performance is like under vibration? Henry Just guessing here . . . poor Unless it is a specifically G-hardened device, it is sure to be microphonic. All crystals are. G-hardened is just somewhat better. Clay ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Are the days of buying a crystal numbered?
The trick of including a PLL in an oscillator package has been around for a while. The initial ones were programmed at the factory or distributor. The idea was to avoid the long wait while they polished the crystal to your specific frequency. They stocked them in a handful of frequencies and programmed the right one when they got your order. Early ones had a bad reputation due to lots of jitter. These look good to me. (But I don't work in this area so maybe their marketing stuff fooled me.) This is time-nuts. What is good for one application will be useless for another. Spurs might be a problem, it depends on your application and the exact numbers of the target frequency and the crystal frequency. -- These are my opinions, not necessarily my employer's. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Are the days of buying a crystal numbered?
Hal Murray wrote: The trick of including a PLL in an oscillator package has been around for a while. The initial ones were programmed at the factory or distributor. The idea was to avoid the long wait while they polished the crystal to your specific frequency. They stocked them in a handful of frequencies and programmed the right one when they got your order. Early ones had a bad reputation due to lots of jitter. They where pretty bad. It got worse that the reps where denying that there was a problem. Single-cycle jitter (which was relevant for that app) was clearly vissible and didn't take much effort to measure and toss the samples over the shoulder. But they where fairly simple PLL designs. One case I saw would allow the PLL to oscillate badly sometimes when you started it. For that app it was totally useless. These look good to me. (But I don't work in this area so maybe their marketing stuff fooled me.) This is time-nuts. What is good for one application will be useless for another. Spurs might be a problem, it depends on your application and the exact numbers of the target frequency and the crystal frequency. I could not agree more. These are good contribution to the design-scope for some applications. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
