Noise Figure Measurement [Y Factor Method]

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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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26 окт 2014

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Комментарии : 22

@hejkopejko 3 года назад

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.

@w2aew 9 лет назад

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!

@s31ACE1252 Год назад

I have what may be a stupid question. Why did he subtract for the Y factor? The equations I've seen for Y factor are division of the on to the off power. Does it somehow revolve around being in dbm vs doing it linear?

@PapasDino 9 лет назад

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.

@phuchoang6742 2 года назад

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

@user-lk1os1sb4u Год назад

very very good explained!!! thanks so much

@shesmesh9 7 лет назад

Great Video...Thank you so much

@KaptainLuis 2 года назад

thank you soooo much!very good explained!

@BalticLab 2 года назад

Glad you liked it!

@bhavani1089shankar 8 лет назад

God Bless you and thank you very much

@OneBiOzZ 9 лет назад

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

@g8fek867 9 лет назад

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.

@AllElectronicsChannel 3 года назад

But should not the measured value be smaller than the datasheet value, as the instrument NF was not accounted?

@apostmax 8 лет назад

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

@michaelonumonu7210 2 года назад

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

@BalticLab 2 года назад

I didn't :-(

@killboyomglol 2 года назад

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?

@user-hx6is2ze6d 6 дней назад

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

@BalticLab 5 дней назад

Hi! That's probably not a good method for measuring flicker noise as thermal noise us the reference, yet all test equipment will bring it's own flicker noise issues with it.

@agatismp4561 3 года назад

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

@vikramkumarp 3 года назад

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

@Igortruntrek 6 лет назад

Noise source i find here : www.ebay.co.uk/itm/Noise-Source-Generator-10-1600-MHz-15-dB-ENR-SMA-Noise-Figure/162685733837?hash=item25e0d34bcd:g:oakAAOSwVORZ0uaH