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In my early career I had the wonderful opportunity to work, in sales, for HP. Back before it was Agilent or Keysight. Back when Bill and Dave were alive and running the company.? They spent a great

Alan, I have to laugh (in a good way, not maniacally), as this is another one of those things were usage varies from one person to another. The reflection coefficient, gamma, is actually defined by

Indeed. Do a web search for "is return loss positive or negative". You'll turn up lots of forums in which to pontificate. Short answer: It's done both ways, and nobody finds this confusing. But they

Bob, There is a section on measuring common mode chokes on the following website (near the bottom of the page.. https://www.nonstopsystems.com/radio/frank_radio_coax-sw.htm However, this will not give

Return loss is a very old term used in the telephone industry for a very long time. There is confusion about the sign, but the negative has been used as long at the term return loss has been in use.

This is all about definitions. The reflection coefficient, gamma, has both magnitude and phase values and is defined by greek letter RHO. The value of RHO varies between 0 to 1. Return loss is defined

I just ordered a nanavna from Alibaba Wuyi Zeenko Industrial And Trading Co., Ltd.(the Hugen design based on edy555). Thx to all for info on “place to buy”. Henry

A loss is a negative gain. So, saying a return loss is negative simply means you are expressing that loss as a formal gain. Don't overdo the besserwisserness of your insights. Den ons 21 aug. 2019

Interesting topics being discussed. I was surprised to read that the RL from a short or open is 12.XXXdB. That just isn't true, ever (assuming, of course, lossless feedline/ connectors). Its 0. Always

It worked! Thank you very much. My workaround was to use zplots: https://ac6la.com/zplots1.html All the best!

Hugen, I was looking at a signal using your PC nanovnaSharp application and as I moved the cursor along the waveform, there was an abrupt change in phase that did not match the scale. I have added a

"When using NanoVNA v1.03 and I hover the mouse on top of the traced line, the result is a flickering rectangle with some data inside." Try holding down the ALT key. This works good on my Win7 system.

I've uploaded some rough dimensions (in mm) for the NanoVNA in the Misc photos section ( /g/nanovna-users/photo/93569/0?p=Created,,,20,2,0,0 ) as well as a file containing drawings of

Thanks, Larry, I'll forward your link to Dick. Maybe he can update the Matlab site with the new link. By the way, if one can download the zip file for the tool (I think you have to have a Matlab

And on Tue, Aug 20, 2019 at 06:51 PM, Dr. David Kirkby from Kirkby Microwave Ltd wrote: Good morning, Roger and David, Both of you raise an interesting question, which is "how much does a calibration

Sorry if this was addressed already, could not find it. When using NanoVNA v1.03 and I hover the mouse on top of the traced line, the result is a flickering rectangle with some data inside. What can I

The document referring to the Q measurement is no longer on the Matlab website but can still be found here: http://www.walkingitaly.com/radio/RADIOSITO/za_fatti/tutorial/q/old/rfqmeas2b.pdf

If the VSWR of a load is good from DC to its rated frequency and the connector within specification (much harder to check, but possible), then the load is okay. It doesn’t matter if the resistance

Hi Vidas, I agree, for $50 the NanoVNA is a heck of a tool! I purposefully set the 8753C to use the same number of points as the NanoVNA (101 points), so both instruments use the same set of

Hi Enrico, Yes, it is a Matlab script. Note that it also requires the "RF Toolbox". You can download it from MATLAB Central's page of contributions by Dick Benson (who has posted many excellent