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 all

A 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 0.1ppm

I 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/sinesiggen

73 Hans G0UPL