开云体育

Stephen I found the functional block diagrams of both F302 and F303 series processors, if you're interested. Again, a lot of the chip's internal functionality is not used. The F303 was originally

Larry Rothman Thank you for your thoughts. I was unaware that the full functionality of the MCU was not needed. Personally I take the view that if a manufacturer attempts to replicate a product in

That is an unknown clone. I've never seen that processor in one of these before BUT that doesn't mean it won't work. The nanoVNA only uses about 30% of the internal peripheral ability of the chip

I purchased a "NanoVNA-H4" from Amazon in the UK. The brand is Hima, supplied by ANGLO CT. I purchased from Amazon to try to avoid delivery delays and unexpected import costs. I opened the back of the

Compensation for the delay is part of the normal calibration. You only need to set the delay separately to compensate for a cable or connector length that can't be part of your calibration.

witch pin do I check and what should it read? Wayy too small traces for my multimeter so I have to go lend some smaller stuff tomorrow.

you need check output switch u551, see v2 scheme

nope. does not matter if the frequency is 3mhz - 6mhz or 140mhz - 455 mhz or full scale etc... Always the traces are all around the place.

Your device work in < 140MHz? Check work in < 140MHz on V2 and V2Plus firmware If work, problem in ADF generators or switches

not sure how quoting works here but @Larry Rothman From the link above. I installed the v2.2 firmware. The one that is not sold anymore. Problem is still the same Then I installed one above it (v2

Valinire in previous post said to use the following for the s-a-a-2 One is the comm port and the other is the firmware Here is the links

Config-version only displays the version of FW you installed into the device. If you installed plus FW into a non-plus device, you will see 'plus' on the version screen. So - you need to install the

Config - Version says NanoVNA v2 Plus. I just tested ALL the firmwares listed on that site I linked. 2 of them did not work at all, 2 were super slow and rest were working but still with my problem.

Are you sure you have a plus version? The firmware for regular V2 and V2Plus is different (but work, not good work).

I tried with those sma calibration things and I also calibred with 50ohm resistor I also tried open so without any connection short, I shorted sma center to threads and load was 50ohm resistor

There is a similar effect when you upload the plus version firmware to the non plus hardware.

The saa-2n doesn't use dfu for flashing.? Please search the forum messages for: SAA-2N firmware? And you should find the info you need.? Please remember that this forum is primarily for the NanoVNA

So I tried following the procedure in the absolute beginner guide in order to update the firmware on my SAA-2N. I noticed when connecting it to my PC it shows up as USB Serial Device (COM3) and when I

I always calibrate with as many connections and cables attached as I can to eliminate insertion loss. I never considered delay as a factor, which I will now have to research.

It looks like the calibration parts and or a cable or 2 might be defective.? This has tripped-up users in the past with the same display output.? Check all your call components.? On Tue., 14 Sep.