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Thanks Roger, did all of that still nothing. In win7 when I plug it in the USB never responds in any way at all like as if nothing ever was connected at all. Nothing in the device manager, and nothing

Thanks for the response! On the cable, just got a new fancy one from amazon and tried it this morning before sending out my email. I was hopeful that it would work and it did not.......then emailed

At this moment as you can see i update UI and next release name as v1.0.1 UI fixes still not fully comleted (for see changes need reset config for apply new colors)

@DiSlord - let me ask you kindly following - your H4 branch fw version string comes from "git describe --tags" which shows always 0.7.1... What would you recommend to put in the VERSION string such I

Try test 200-350MHz range for better search threshold limit. PS then i work under H4 vs SI5351+SI4432 i rewrite sweep mode, now it use band table for better ajust settings I think remove threshold as

Guys, you have to find your SI5351 max frequency, those 310M is the value I flashed in (for experimental reasons only) because I found out my max frequency is 321MHz..

I tried it, my NANOVNA-H overheated more slowly with this setting. Gary AG7TH

The SI chip is specified up to 200Mhz. Have you tried it with this threshold? Mike N2NS

On Fri, Jul 17, 2020 at 03:54 PM, DiSlord wrote: .. > In nanovna.h i begin use AUDIO_CLOCK_REF (86016000U) > Try revert to #define AUDIO_CLOCK_REF ( 8000000U) > // 5ms @ 96kHz > // Define aic3204

A basic question for you:? have you tried a second USB cable with the H4? There have been instances of companies shipping cheap cables that fail quickly.? You might also want to open the H4 housing

With Win7 you need to manually install the driver. See the Wiki in this group for details.. Roger

The overheating issue on my NanoVNA-H appeared early in April after I installed beta firmware titled "NanoVNA-H v0.8.3_96kHzIF_3.2kHz_sweep_points". Looking back I wonder if that firmware was a factor

@ Igor-m.... I used your settings and by setting the threshold up and down many many times I found my max threshold setting @ 305150000 and can leave it there for hours, it never gets unstable. The

Thanks for all the suggestions. I ordered an H4 and will experiment with an aluminum heat sink that bridges from the si5351 to the AIC 3204. The si5351 was never hot to the touch, so it does not take

Hello, I have a new H4 unit that I just got a couple of weeks back. Works great until I go to us it with a PC. What I am seeing is on win7 the laptop that I am using never sees anything when I plug in

My tests with threshold: In the latest H4 source the threshold is set 300.000.100 Hz. I set 201p, 1kHz BW, start=900M, stop=1000M I started to increase the threshold till the display shows mess. ch>

In nanovna.h i begin use AUDIO_CLOCK_REF (86016000U) Try revert to #define AUDIO_CLOCK_REF ( 8000000U) // 5ms @ 96kHz // Define aic3204 source clock frequency (for 8MHz used fractional multiplier, and

I built the latest H4 fw version (pulled from Dislord's github 1.5h back) with sdcard and 32kHz xtal. Soldered xtal and socket in, flashed the fw in (shows old fw version on the LCD). Set time (do not

It's important to note that this thread has 3 periods of comments that are somewhat out of sync. 1. My original comments that were ... well, whatever. 2. My recent reply to clarify that I did not

Did you try to change the threshold, e.g. the frequency at which the SI5351 switches to harmonics mode? All nanoVNA use the SI5351 way out of spec. Try threshold 250000000 first and calibrate till