QRP Labs ProgRock, Руководство пользователя

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8. Resources

Please see the kit pages at http://qrp-labs.com/progrock for information on latest updates and
issues.

Notes on getting excellent frequency stability from the Si5351A Synth kit:
http://qrp-labs.com/synth/freqstab.html
9. Version History
1 20-Apr-2016

First version
2 27-May-2016

Added Alan G8LCO description of the noise filter circuit

Added clarification that capacitor Cx is neither required nor supplied, and should not be fitted

Clarified orientation of the 4-way DIP switch; the silkscreen does not match the component print

Corrected several typos, missing words, incorrect words etc.
3 24-Jun-2016

Added note that very short 1pps pulse widths (e.g. 10us) do not work with this kit.
4 25-Jun-2016

Re-write of the last paragraph of section 6.6 to make the calibration procedure more clear
5 27-Jun-2016

Section 6.6: emphasise the importance of writing down the reference clock value, in case it is
necessary to re-calibrate some time in future
6 11-Aug-2016

Section 4.3.3: Add section about not installing noise filter components when you use the OCXO
7 04-Oct-2016

Added clarification that the button press should be a short one.
8 12-Jan-2017

Corrected pin numbers of Si5351A Synth module in the circuit diagram