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Re: Looking for Noise Source Driver Assembly E4401-60123 for E4407B Spectrum Analyzer

 

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Charles,


Many thanks for this graph. It is very interesting as it also mentions the good old (and still very useful) HP8970B NFA.

Googling the doc number in your message comes up with the doc: "Minimize Noise Figure Uncertainties", apparently a newer version. Same graph but no HP8970B here. The minimum uncertainty is quite a bit higher than what I normally see: +/- 0.1 dB. Interesting stuff: noise figure measurement.

Best 73 de

Harke PA0HRK


On 02/12/2024 01:56, Charles Edmonds via groups.io wrote:

Hi Olaf,
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before you pursue this option further you might like to read some of the manufacturer's documentation on that option. An early version of 5989-8056EN included the below plot which includes the ESA with Option 219 to other systems. Basically it shows that Option 219 in the ESA spectrum analysers has such high uncertainties that it is rather useless when measuring modern equipment. I also note, from only a very quick browse, that the current version of 5989-8056EN does not include this chart and in fact makes no mention of Option 219 for the ESA spectrum analysers.??
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regards
Charles Edmonds
VK3CLE
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