On Oct 22, 2024, at 9:40?PM, pianovt via groups.io <pianovt@...> wrote:

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Gary, the most hobbyist-friendly approach would be to borrow a noise source with a trusted ENR table and use a noise figure meter to transfer the calibration to your noise source. That's in principle what Keysight does when you send your source in for calibration. There is a little bit of math involved which you can take care of in Excel.

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Keysight uses a noise figure meter, a noise source they vouch for, and a N2002A test set. They also check return loss before they calibrate the source. The N2002A is not essential, it helps automate the process. It contains some relays, attenuators and isolators.

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Vladan

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On Tue, Oct 22, 2024 at 08:03 AM, Gary Hitchner wrote:

Would anybody have a recommendation on where to send a 346B noise source for calibration, or verification?

Generate a new table if necessary.

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It appears Keysight does still support the 346B, just wondering if there are other options that may be more hobbyist friendly.

Gary