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Re: Do attenuators around the mixer improve the performance of the tinySA


 

That noise on 10mhz is not seen when probing the GPIO2 pin.


On Wed, Feb 19, 2020 at 09:09 AM, Jerry Gaffke wrote:
I didn't chase it, but when I looked at my 10mhz reference with a scope
and set the trigger a little bit high, I saw some occasional disruption in the 10mhz.
Could be that the Si4432 doesn't do a clean divide-by-3 of the 30mhz reference,
as it is attempting to create a 50% duty cycle square wave.
And that setting up register 0x0A for 15mhz instead of 10mhz will be much cleaner.

Or I could have just been seeing trash due to layout issues.

Jerry, KE7ER

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