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phase noise analyzer and phase noise measurement

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Gerhard_dk4xp:

--- Quote from: alan.bain on May 12, 2023, 10:12:30 pm ---Did you use the Spartan 6 eval board as in AH's write up?

I got the impression that supply chain problems (or rather fab capacity) had effectively forced Spartan 6 out of the market but possibly this was only supply affecting production of new designs rather than eval boards.

I read AH's excellent write up and found the approach very interesting, especially the cross-correlation trick with two independent input chains to improve the measurement noise floor. Part of me likes the idea of a 3048 with all those nice HP boxes, but probably the digital approach will get better results.

--- End quote ---

Recently, Spartan6 has been guaranteed at least to 2030 by AMD/Xilinx.

I saw 2 engineers working with a E5052B some years ago and one of them
said with a happy face: "Do you remember how ***** it used to be with the 3048??"

Gerhard
(still working on that stereo & dual conversion down converter from Xband to Timepod.
Slow progress b/c of daytime job.)

Jackob:
Do you have measurement results already - did the noise floor improve?

Br, Jackob

hpw:

--- Quote from: wanxiangwan on June 16, 2023, 05:40:52 am ---the vendor has a new board.

--- End quote ---

Yes, read on his web as Development of PN2060B: hopefully the noise floor can be lower than -185dBc (or maybe -190dBc).

More interesting would be @1Hz and @0.1Hz. Also input sensitivity as levels are IMHO not given.

Hp

Oscill8:
Can someone here point me to the Andrew Holmes documentation?
Thanks!

3apw:

--- Quote from: Oscill8 on July 12, 2023, 07:17:41 pm ---Can someone here point me to the Andrew Holmes documentation?
Thanks!

--- End quote ---

http://www.aholme.co.uk/PhaseNoise/Main.htm

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