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Dave and Ohan, Thanks. I'm going to try to use the ST-Link V2.0 units I bought so I can gain some experience with using them and the various C development environments. I've got quite a few STM32

Found a UI bug in latest Sept 18th TDR version firmware from Erik in the filles section: - select Display -> Transform -> Velocity Factor - click on the small keyboard image icon at the lower right

Placing a 20 - 100 ohm resistor has not brought a solution. The IP5303 will not start wiyh the SW1 switch. Also, as a test with a 6V / 3W light bulb on the load pin 8, it will not start. Here the load

Hi Rune Many thanks; the full path fixes it... /home/nick/nanovna-saver/full_sweep but ~/nanovna-saver/full_sweep does not work. A few suggestions on the user interface... - how about removing the

Inputs appreciably outside power supply limits will be problematic. ESD was most problematic for CMOS not internally protected. 50 Ohm bridge pretty much protects the active chips; bridge resistors

One other thought. During a discussion yesterday on this group, measurments were taken as to what the OUTPUT levels were from Ch0. They were 200mv peak to peak IIRC. As such, I think I'd want to

Thanks Erik. I read the slides from the link but did not notice mention of another protection method that I've seen using zener diodes. Referring to the attached image, drawing A is mentioned in the

You could use something like a ESD0P4RFL. Will need some space on the board. And it's quite small, but very low capacitance.

Erik.. Two things here confuse me. 1 - I've looked at the SA612 spec sheet. I can't see anything that tells me what the maximum input is before the device is destroyed. That would determine what

Reg, for this reason I picked up some "SMA Nuts" on eBay after I discovered I had the same issue with my NanoVNA. Now each of my three SMA standards wears a collar. Below are a couple of eBay links to

http://www.na0tc.org/lib/exe/fetch.php?media=technical:rx_protect.pdf slide 11 Simple and cheap: Back to back diodes ? Protection not dependent upon configuration ? Diode type is not critical

So the question is, what precautions can be taken to protect the NanoVNA ? Prayer is not an option ;-) 73 de Andy

The CH0 input of the nanoVNA is basically an attenuator connecting to a SA612 mixer without any additional protection.

editing the .submodules file: - replace the 3rd line with "url = https://github.com/edy555/ChibiOS.git" - add a new line to the end of the file Finally type "git submodule sync", and then "git

Thank you very much for your post, John. Posts like yours certainly give me motivation to continue working on the application, even when I find issues that are difficult to solve in an elegant manner.

Hi David. I've updated the post with instructions, on the opposing side of the SMA connectors CH0 and CH1, there are two pins on the PCB labelled VDD and BOOT0. They need to be shorted with the

This sentence “Flash by setting the device to DFU boot, either in software or by short of pins, then:” could usefully be expanded. I don’t know how to do either Dave -- Dr. David Kirkby, Kirkby

Hi Reg, Ohan made a guide. I'm not certain the SSH keys are required, but it's all there: https://zs1sci.com/blog/NanoVNA%20Build%20Source/ -- Rune / 5Q5R [email protected]> wrote:

Greetings Dr. David, Thank you for flagging my less than clear and possibly misleading post! I did not intend to infer that my DIY 50 Ohm load has the quality of a 53 dB return loss instrumentation

and left comments to the savants. Now, though, with this 0.0.10 release, I just have to convey a massive "thank you" on behalf of all of us lesser users, ham radio operators particularly. We hams now