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The NanoVNA originally designed by edy555 allows the use of DAC to adjust VCTCXO, but when I made NanoVNA-H, I thought that adjusting VCTCXO was too much trouble for most users, so I used TCXO. For

On Sat, Mar 14, 2020 at 09:38 PM, <hugen@...> wrote: The NanoVNA-H4 uses DAC output dimming, so the brightness can be adjusted using DAC commands. Dac_value = 800 is the minimum brightness,

Thank you for the command information, Hugen. I have a minor H4 firmware enhancement request: is it possible to use the jog switch to change also brightness when in the brightness config GUI menu? I'm

hwalker11 is right. The NanoVNA-H4 uses DAC output dimming, so the brightness can be adjusted using DAC commands. Dac_value = 800 is the minimum brightness, dac_value = 3300 is the maximum brightness,

On Sat, Mar 14, 2020 at 07:10 PM, Larry Rothman wrote: Maybe Hugen can let everyone know if there is a Console command to adjust the brightness on the H4?

Kurt, Thanks for your comments. Yes I am familiar with the using Rp instead of Rs in NanoVNA saver. I agree that the CH0 and CH1 impedance needs to be close to 50 ohms for accurate results using the

Maybe Hugen can let everyone know if there is a Console command to adjust the brightness on the H4? I've been attempting to keep Cho45's Original userguide up to date and have added quite a bit of

Thank you, found that out later after I did the jumper update. I'm just scared to mess with the display setting anymore I don't want to end up stuck with a dark screen. It may be as bright as it gets

Robert, You no longer have to open the case to jumper the booth pins.? To put the unit into dfu mode, turn it off, press in and hold the jog switch and then turn on the unit and release the switch.?

Hi Roger Using the S21 methods requires that both the source (CH0) and load (CH1) impedance are pure 50 ohm, so you get also errors this way. Have you tried to read the Rp instead of Rs in

Yes the S11 bridge method starts to get quite inaccurate after the impedance gets higher than a few hundred ohms. Fortunately the NanoVNA can do S21 measurements and we can determine complex impedance

I have tested the 1:49 transformer loss and found it to be 1 to 1.5 dB depending on the band. I checked this loss several ways with good agreement using the Nanovna. I also measured the feed point

What are the exact steps to adjust the display brightness? Mine comes up with a keypad and 1 800 I think it was. I tried something and it went dim and I managed to get it back where it was. I would

To test for insertion loss (S21) you need two identical back to back. You may want to observe phase with frequency as well. In those cases you ahv eto allow for two devices so the insertion loss is

Thanks Herb! On the larger screen being a lot slower, it should only be slower based on the number of pixels compared between models. I had to do a lot of rewriting of library lcd routines from

Dislord, the talented Russian coder, who collaborated with edy555 on his recent 0.7.0 firmware release has uploaded a beta 0.8 firmware with the following Google directly translated Russian comments:

On Sat, Mar 14, 2020 at 10:12 AM, Jim Potter wrote: ...mine was the smaller screen version, but the AURSINC version was complete with battery and shielding. I find it convenient to use it with my

Praba Karan, Depends what you are trying to check and over what frequency range? Are you just looking to measure VSWR vs frequency or other things maximum power handling capability, efficiency

Thanks, mine was the smaller screen version, but the AURSINC version was complete with battery and shielding. I find it convenient to use it with my laptop, but I haven't taken it into the field.

On Sat, Mar 14, 2020 at 09:30 AM, Mark Schoonover wrote: Another approach is to put a 2.5K resistor across the output. ========================================================= That was pretty much