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@Alex: Thanks for your suggestion ... I am actually aware of the Analog Discovery, however, its usable band-width is too low for my purposes. Also, its intrinsic noise level is quite high thus not

If you see the unit is in bootloader mode, did you run Dfusedemo and see if it shows up in the upper left area as being in bootloader? There are a number of messgae threads from just over a month ago

@Jesper, Another thing You might give a try with all this decoupling networks measurements might be "Analog Discovery" from Digilent, which covers frequencies from DC to 25 MHz. Though not very clear

I have had this NanoVNA-H4 (nanovna.com) for a little over a year now and just saw that there are firmware upgrades. It came loaded with Version 0.5.0 with a build date of Feb 21, 2020. I am having no

Ok ... Looks interesting and probably also challenging in different ways than what I am working on ... Thanks for partly settling my curiosity ;-) Jesper

that was for a Software Defined Radio that was part of the SCaN Testbed on ISS https://www.nasa.gov/directorates/heo/scan/engineering/technology/txt_scantestbed.html

@ Jim : Thanks Jim for considering & commenting. I think I will try it out then - possibly with a JFET probe in-between the PSU & the VNA to see if there are any differences between the end of a 50

On 2/27/22 12:07 AM, moensted1@... wrote: > Hi all - many inputs and much to consider - but thanks! I'll address your feedbacks in sequence below: > > @Jim : Thanks for commenting above and

Hi all - many inputs and much to consider - but thanks! I'll address your feedbacks in sequence below: @Jim : Thanks for commenting above and also your setting up/linking to your ADC interference

No. JoeSmit software works with the original (H), V2 and the latest with LiteVNA.

If you check the video it has a link to his software. However, it is not for the "original" NanoVNA H. It is for the NanoVNA version 2. The V2, is a redesigned version of the Original NanoVNA H. So if

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.