[time-nuts] Modern signal generators

[djl]

Rick: I've spent some time with the dds blocks. We found them to 
generate lots of low level spurs, making lots of "birdies" when used as 
local oscillators in receivers.
We had better results using:
https://www.silabs.com/products/timing/oscillators.

These may be used with GPSDO clocks for accuracy, and generate less 
noise. Cost is about the same; there are two or three sources for 
breakout units. The clock sources do have to be 25/27 MHz, those from 
Leo Bodnar, or use an OCXO.  Digital attenuators are also available; all 
this can be run from an Arduino with oled or other readouts, libraries 
abound. And for quick and fancy GUI, on a pc, use MakerPlot.
Just $.02
Don

On 2018-12-11 09:46, Richard (Rick) Karlquist wrote:
> Another gold mine.  I used to work for Agilent/Keysight so I
> am very familiar with their signal generators.  It
> will be interesting to see the R&S viewpoint.  The DDS
> stuff is very valuable.  I have been considering using
> a DDS eval board with a low noise 1 GHZ reference to
> make a poor man's signal generator for my home lab.
> Your paper will be required reading.  I suspect a lot
> of time nuts are in a similar situation as me.
> 
> Thanks.
> 
> Rick
> 
> On 12/11/2018 7:23 AM, Ulrich Rohde via time-nuts wrote:
>>   
>> https://badw.de/fileadmin/members/R/3685/6_4_18_UNI_BW_June18-safe.pdf
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-- 
Dr. Don Latham  AJ7LL
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304