Noise Figure Measurement [Y Factor Method]

This video shows how to measure the Noise Figure of an amplifier using a spectrum analyzer and a noise source using the Y factor method. The D.U.T. used in this video is a Mini Circuits ZKL-2+ amplifier. A Tektronix MDO4104B-6 serves as spectrum analyzer.

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[waew]

Real nice review and demonstration of the Y-Factor method.  FYI - there is a "clear" trace function on the SA menu, so that you can re-start the averaging after you turn on the noise source.  These short topics are great!

[hejkopejko]

For an accurate noise figure measurement you have to do second stage correction to account for the noise figure of the SA. To do this you also need to measure the noise figure of the SA itself, and then calculate the noise figure of the DUT with Friis formula.

[PapasDino]

Super followup - would be interesting to analyze the differences between the three methods in terms of the results. The format is great, short and to the point; please keep producing at least some of your videos in this form.

[phuchoang]

Phúc, Phong, Tiến, Doanh, Cường rất cảm ơn chú <3

[lkossbu]

very very good explained!!! thanks so much

[gfek]

Nice presentation. The noise figure measured is of the amp under test and the test instrument together. Unfortunately the noise figure of the test instrument is very high and even with a 30dB gain DUT, the Y factor value represents the NF of the 2 part system, not just the amp. The MiniCircuits typical NF data for that amp at 10MHz is 3.4dB. So a useful indication measurement, but not very accurate. Lower gain DUT's would lead to much worse results.

[OneBiOzZ]

it would be nice to see a video on wideband noise sources and maybe even building one up

[KaptainLuis]

thank you soooo much!very good explained!

[apostmax]

Great video! What's the noise source you used?

[michaelonumonu]

Awesome video. Quick question, what did you used as your calibrated noise source and how did you ensure it was calibrated?

[홀리몰리-ni]

I am a student studying flicker noise, is the y-factor method valid for measuring flicker noise?

[agatismp]

ENR is the value at the input port. So real ENR is = ENR - cable loss

[vikramkumarp]

if Y values are less than 10 it gives negative values. that time how to measure NF

[killboyomglol]

Can you tell me how to measure NF for mixer without image rejection? Can i do same mesurements as with amplifier, but add + 3dB to NF?