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I should have said: Even if it wasn't, it would just mean that if the freq variable was greater than the harmonic threshold variable multiplied by 5 (the 5th harmonic) then it would set the frequency

Jim, In the code, the following lines are commented out /* if (freq > config.harmonic_freq_threshold * 5 ) { freq /= 7; ofreq /= 9; }else */ Even if it wasn't, it would just mean that if the freq

The Tx and Rx sides of the Nano use different multiples (so that the receiver doesn't "detect" the fundamental or "wrong" harmonics from the Tx side) The code seems to say 5 and 7 for Tx, Rx

@Jim Lux While I'm pretty sure the nano only uses the fundamental as well as the 3rd and 5th harmonic for measurements, your point is taken. You did give me an idea for a potential solution, and

The ISM band at 900 MHz. is only "unlicensed" for the user/purchaser of the equipment in most countries (UK, EU, US, Canada, Australia etc.) The manufacturer of this equipment MUST have his product

You have to reflash with the correct firmware. To get back to DFU mode you have to short the VDD and Boot0 pins inside the NanoVNA. The procedure is all described in the "Absolute Beginners Guide to

flashed my NanoVNA-H withNanoVNA-H4_20210131.dfu, i think this was wrong. White screen and usb port is no longer recognized. What should i do? Friedrich db6px

On 10/7/21 9:10 AM, msat via groups.io wrote: > @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

@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