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@OneOfEleven I did mention a few times that I intend to transmit at a fixed frequency in the 900MHz ISM band. I haven't decided which frequency specifically, since I'll likely have to base it off my

On 10/6/21 10:53 PM, msat via groups.io wrote: > First off, thanks to everyone for all the helpful responses! It made me realize just how loaded my question actually was. It also help unjam the gears

I may have missed it but I didn't see if you have an amateur radio license. Transmitting RF is regulated, and licensing is how the regulatory agencies control it. An amateur radio license permits

If you were to settle to a bit less power you can use a ready RF amp something like these cheap ones .. https://www.ebay.co.uk/itm/334166137242 Don't forget any RF amp you use will also need a low

Well, the thing is, if you end up using a band pass filter to select the desired harmonic then if you test at a different frequency inside the ISM the phase of the carrier will change anyway depending

John, To my knowledge, the V2 outputs a sine wave up to 350MHz, and square wave up to 960MHz. While this would allow me to use the fundamental frequency in the desired ISM band, it would still require

Mark, You may want to look at the NanoVNA-V2. It can work up to 3GHz (and beyond) using the fundamental. --John Gord

First off, thanks to everyone for all the helpful responses! It made me realize just how loaded my question actually was. It also help unjam the gears in my head. That said, there's a lot of stuff

Surprised by such a good match with the S11 method. Considering that DE-5000 measurement uncertainty is ± 0.023Ω both results are acceptable. Can you add some common mode chokes and see if that

Mark, You might want to consider the TinySA. It has a signal generator function as well as being a spectrum analyzer. It can generate a signal up to 960 MHz as a fundamental. You might need some

Demand continues and I will place a third order. Will order enough that I will have additional spares. Now have information for International orders. 1 board @ $3.00 CONUS 1 board @ $3.75

According to theory the S21 shunt measurement is best for measuring low impedances. My experience on the NanoVNA-H4 has not been that good with this method. The CH0 and CH1 impedance should be 50 ohms

These are very useful cheap'ish boards for creating 35MHz to 4.4GHz ..

yes, that's the kind of thing I was thinking of..

I might leave some feedback on github (did it also in the past). But first I need to understand what might be the issue. As Chris says, it is all a little too confusing... I am still busy untanging it

Hello Kent, That sounds like interesting work you do. Sorry for this off-topic response but, G8EMY. What a coincidence! _Norman, G8EYM._ Sent from my GNU-Linux ThinkPad.

Mark, as I understand it, your nanoVNA would have to run its synthesizer on one fifth of your operating frequency, and so you would have to use the fifth harmonic. That's because the third-harmonic

Hi Norman Yes, CE and the FCC would consider that sweeping signal a Transient during any compliance testing.Might even get it declared Spread Spectrum hihi.? ?(That's what Lorawan is doing)?

Mark, Since you only want to transmit one of the harmonics from the NanoVNA you will require a bandpass filter for the 900 MHz. band. Here is a link to a good online tool that can design many types of

For filter design and performance, you might try Elsie: http://tonnesoftware.com/elsiedownload.html <http://tonnesoftware.com/elsiedownload.html> It's good for lumped element filters. My first knee