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I am a new NanoVNA user. Mine is an H v3.6. No firmware updates have been done. I have been using it only for a few days. Sometimes, on sliding the switch on, the screen is blank, but the blue LED is

Many thanks ddemos1963 for sharing your success in making NanoVNA App works with Wine in Linux. I also use only Linux. In Wine I ran NanoVNA-App-Setup-V1.1.209-0D18.exe and the installation went

Nizar, With only S11 and S21 measured, the renormalization depends on the symmetry of the device measured. Most passive linear devices have S21=S12. (Isolators are an exception.) Many filters have

Don, attached are the specs I have for your filter. Note that the G.D.T. entry is blank. GDT means group delay time and this filter has no spec. Murata made many special types for FM IFs where group

Thanks for the test, Don. I have dozens of Murata 10.7 MHz filters from 110 to 280 kHz bandwidth. Some show little difference when reversed, but most do. Incidentally, it is probably the difference in

Hi Brian and Nizar, As a reference I went and tested my 10.7 MHz ceramic filter connected in both directions and see very little difference (part number SFE10.7MA5-A which is a Murata part number).

Hi Still no reaction with this topic, Zero simple graphic displayed without strike should be more pleasant to read on the screen especially if you have some vision trouble to avoid confusion with

Hi Brian May be Jhon can reverse the same ceramic filter and get a comparative response with forward curve already succesfully published here , i expect to found almost the same response, indeed

The renormalization program is listed at the top of this page: http://ham-radio.com/k6sti/mu.htm See the bottom of the page for downloading instructions. I think the program works, but I don't have

I've observed that reversing just about any Murata 10.7 MHz ceramic filter alters the response and changes the measured distortion in an FM tuner. I believe this means that S11 differs from S22, or

Hi John, Thanks for running this comparison test. Looking at all 3 of your plots the renormalization routine did an amazing job compared with no renormalization in which no series resistors were

Jim, It renormalization doesn't change the Q in the measured test circuit, but it can compute what the Q would be at the new impedance. The S parameters are a complete description of a linear 2-port,

But renormalization just changes the calculation for the S parameters. It doesn't fix the change in Q.

Nizar, I put series 390 ohm resistors on both port 0 and port 1, creating a 440 ohm environment for the filter, close to the 430 ohm renormalization I showed before (see message 39460). I then

Jim, Of course the change in termination impedance changes the filter response. The point of the renormalization is that the response can be recalculated to show what it would be at the different

Hi it seems to me that for a linear or quasi-linear circuit without active elements, it should be correctly compensated by single precision floating point calculation using the Z renormalization

Since most filters are a series of resonators of some kind or another, terminating them in a resistance other than the design resistance will probably change the filter characteristics. Consider a

Here is an article on ceramic filters by a popular manufacturer Murata. https://www.changpuak.ch/electronics/ceramic_filters/Murata_piezo_filters.pdf Attached is an excerpt showing the importance of

Hi John and gang, I decided to keep things relatively simple and just used my signal generator with matching transformer to feed the ceramic filter and then compared response using either a 56 ohm

Hi Mike, Insertion loss and bandwidth measurements nearly identical between the l pad matching system versus using transformers which thankfully is what should have happened. The transformers which