开云体育

Someone had asked about using the NanoVNA for duplexer tuning. There is an excellent video on that by David Houser KG5RDF here: https://www.youtube.com/watch?v=y7PEDRN1PpY Sorry but I could not find

Please read post, all this new features about SD card in it /g/nanovna-users/message/14447

Do you mean the "bandwidth" settings Igor ? If so, that is not the scan frequency, that is the baseband bandwidth, which can be set to 10Hz to 4000Hz .. NOT MHz The baseband bandwidth is the bandwidth

Thank you DiSlord, you are the best. You have really done impressive upgrades! I'm new to this firmware so got questions :-) Appart from saving the params to card, is there a feature to take

better reset config, 'clearconfig 1234' And made touch calibration if need, after save config (config->save)

Thanks DiSlord, I see how to change the date/time in the post you mention. Is it required to perform any other type of manual command and initialization from the console prior to use the newly flashed

Add anothes screenshot 30dB up to 2.7GHz I think it very good perfomance for H4 PS i not good in hardware, but possible need change filter to AIC ADC for get better results

While test 192k ADC i found interesting thing Can you check work your H4 up to 2.7 GHz in different modes vs this firmware? PS i see good results up to 2GHz, but and to 2.7GHz results not bad. see

read this post /g/nanovna-users/message/14447

Hi, Got a H4. Managed to get and solder the proper SD card part based on DiSlord's hint on what to buy. Also soldered the required 32.768KHz osc. My previous version is the latest release from Hugen's

ok, I can set for example 1500MHz or 2000MHz but it disconnects the H4 from serial, it also offers to save the .bmp file when clicking on Scan.

What is the max frequency set? I cannot do 2000MHz (v0157, H4 108fw). Also the BW - sometimes it takes over what has been set in H4, once it overwrites the H4, not sure I understand it how it should

I am not sure but I think this serial link over bluetooth comes from a Samsung phone USB driver... https://developer.samsung.com/mobile/android-usb-driver.html

As a first step before replacing I would try to determine what is my Si5351 max overclocked frequency (where it will not crash inside the closed case without the heat-sink on it)..

I wonder whether the SA612 mixer's clock level (from the SI5351 output) is intentionally so high (3.3Vpp) to get a lot spectral mess out of it. From my experience the max is 0.2Vpp with SA/NE602/612

I already have, all the code has been in there from the beginning, I just haven't finished it and added the "upload firmware" button, it would accept .dfu, .hex and .bin files.

I think need replace damaged si5351, in my NanoVNA need only put finger on it. I add thermal foto in this topic, temperature ?40-45 degrees Celsius

Or execute external DFU program vs options (it more easy)

You can add DFU mode flash firmware :) DFU SE demo sources is open Send command 'reset dfu' and flash, it allow more easy update :)

up to 100MHz si5351 use fixed PLL (32*26MHz = 832MHz) mode and fractional divider for set output frequency, noise depend from how big PLL freq From 100-150MHz used fractional PLL multiplier and