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Hi, Jesper, Before You start working with NanoVNA and Joe's SW, take a look at this thread and the following discussion

Jim, I was working for HP when Tektronix loaned us one of their early engineering models of their FFT'ed spectrum analyzer. They just requested we document what we found. Well,..... it was OK on

Excuse me - 66 MHz aliases to 16.8 MHz ( 66/49.2 = 1.34 - 1 = 0.34 * 49.2 = 16.8)? - Too early in the morning. > > >

Attached are a couple plots of the processed digital output of an ADC, where there was leakage of an external clock signal into the system.? Sample rate is about 49.2 MHz, interference signal is 66

On 2/25/22 8:39 AM, moensted1@... wrote: > @ Jim Lux: > >>> So the idea is to feed a test signal (not from the VNA) into the ADC, and use the VNA to inject power supply noise into the system,

@ Jim Lux: To be honest, the way I've done this is by processing the digitized samples offline, and using a nice pure sinewave as the test signal into the ADC. If you want to do it in the analog

On 2/25/22 7:48 AM, moensted1@... wrote: > Hi all - & thanks very much for your prompt replies! > > @Jim Lux: > >>> Also, bear in mind that the stimulus on the NanoVNAs is a square-ish wave,

Hi all - & thanks very much for your prompt replies! @Jim Lux: .. Hmmm, yes, I am aware of this, however, I just do not know how it will affect the circuitry in question, so I thought I'd give it a

Gotcha - that's kind of what I thought, but the OP mentioned ADCs and DACs.? And that is a different kettle of fish, measurement wise.

PDN means "power distribution networks", an odd term that had appeared for those low-Z nets of filtering MLCC caps in power rails, etc. )) All this nets are characterized by very low Z at low

You may try Walmart online, they have one that is close to the original for $20+ bucks.

PDN measurements? What does PDN stand for? I'd be careful about performance down lo

Hi nanoVNA users, This is my first post here so I hope I am posting in the right topic subgroup .. ? My reason for posting is that I am interested in buying and getting to know how to use a nanoVNA

discussion about VNA calibration error models: /g/nanovna-users/topic/34237712 This paper seems directly related to the Unknown Through Calibration error model, as I understand:

Hi, some related papers from net search, http://www.microwave.fr/publications/149.pdf There had been a discussion thread in this group with recent ly added related paper, too -- Alex

It's not mine but I do share the sentiment ;)

I've been retired for 18 years and even I DON'T have that much time, wow, I hope you have a day job. Very nice work though. Mike C.

Maybe of help: https://hforsten.com/improved-homemade-vna.html (source code on github). wrote:

Hi all, I am currently working on implementing various VNA calibration algorithms in MATLAB. I have succesfully implemented SOLT and one-port algorithms, but I am having trouble getting my head around

You needed to sweep up to a higher frequency to see your impedance null. A method to calculate the VF of any feedline, that will work with a VNA, antenna analyze or SWR bridge. (this sounds