In message <4a8e.56751f36.39a11...@aol.com>, ewkeh...@aol.com writes:

>On all phase noise measurements I use AGM batteries.

Be aware that chemical batteries can be incredibly noisy, in particular
wet or semi-wet types.

It is not periodic noise, so for PN measurements with sensible
averaging periods it probably does not matter.

Poul-Henning

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