EMRFD Message Archive 13631
Message Date From Subject 13631 2017-02-23 06:03:15 Hans Summers HF Low distortion sinewave Signal Generator kit Hi allA few weeks ago on this group we had some discussion about using filtering to turn Si570 or Si5351A squarewaves into sinewaves for a wideband signal generator.I have now released QRP Labs VFO Kit http://qrp-labs.com/vfo firmware s1.03 which can control the 6-band relay kit. I have written up the measurements I made a couple of weeks back into QRP Labs App Note AN006 http://qrp-labs.com/appnotes - the overall summary of the result is:- Rotary encoder tuned signal generator with 1Hz resolution- Squarewave 3.5kHz to almost 300MHz- Sinewave output 10.8dBm +/- 0.4dBm over 2.9MHz to 34MHz range- Worst case -45dBm spurious content on the sinewave output- Optional GPS discipline to better than 0.1ppmI put together a kit set in the QRP Labs shop which includes VFO/SigGen kit, Si5351A Synth kit, 6-band relay switch kit, and 6 Low Pass Filter kits. Price is $76.60. See http://shop.qrp-labs.com/sinesiggen73 Hans G0UPL