[time-nuts] Si5340 synthesizer chip performance

John Ackermann N8UR jra at febo.com
Sun Jan 28 20:15:14 EST 2018

The reference was a 5 MHz Wenzel ULN and the instrument was a Miles TimePod.

On Jan 28, 2018, 8:13 PM, at 8:13 PM, Jerry Hancock <jerry at hanler.com> wrote:
>John, what device did you use for the test?
>Jerry Hancock
>jerry at hanler.com
>(415) 215-3779
>> On Jan 28, 2018, at 4:23 PM, John Ackermann N8UR <jra at febo.com>
>> I received the Si5340A evaluation board from Digikey on Friday and
>fired it up yesterday.  I used the SiLabs "ClockBuilder" software to
>configure four outputs -- 10 MHz, 15 MHz, 29.999 999 9 MHz, and 144.2
>MHz -- all using the 45 MHz crystal that comes with the EVM.  Attached
>is a phase noise plot of the 10 MHz and 29.999 999 9 MHz signals.  I
>would say this isn't too bad!  This performance is certainly sufficient
>for any of the RF work I have in mind.
>> The ADEV was another matter -- about 1e-9 at 1 second, working its
>way uphill from there.  But what do you expect from a bare crystal?
>> John
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