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QRP wrote: …. icon disappears if voltage on the pin is below 100 mV. So, you can get picture with no battery if diode is not installed. Regarding to the edy555 firmware, there is some difference

For active load with no reactance (such as cal-kit load, terminator or just some resistor) software correction may works ok. But when you try to measure reactive loads and resonant circuits, you will

The problem here is that NanoVNA has hardware 50 ohm input and output. You cannot fix it with software settings. Even if you apply error-adapter correction for 75 ohm, your NanoVNA ports are still 50

it looks strange, as I understand it worked well before upgrade. So it looks like some settings issue. Try to connect to your NanoVNA with terminal, for example PuTTY. type "help" it should show you

Mini Circuits and several other companies sell 50-75 Ohm transformersjust for situations like this.??? There is also a 7 dB 'Min-Loss Pad'.? An attenuator with resistance values such that one side

I'm not sure what is wrong? Could you please explain your issue more detail? If correction is disabled you can enable it with CAL => CORRECTION menu. Does it solve your issue?

This icon disappears if voltage on the pin is below 100 mV. So, you can get picture with no battery if diode is not installed. Regarding to the edy555 firmware, there is some difference with hugen79

Bill, you get maximum power transfer when the impedance is matched. Wiki "Maximum Power Transfer Theorem" for details. This applies to transmitter to coax to antenna to air (the ether). Or the ether

KE8CPD, I have the same NanoVNA (Black without shields) as you and also just upgraded to version 0.2.3. I'm pretty sure all version 0.2.3 firmware have the battery icon which I don't see on your

A poor impedance match is usually a bad idea for coax but a conjugate match using low loss parallel feedline is often acceptable. For instance, according to TLDetails, the matched line loss for 65 ft.

Good evening all, I got out my NanoVNA (Black without shields) and without thinking i pulled the lastest firmware and flashed it. I calibrated like ive done so many time before, and made sure the

QRP RX Yes. I've determined the screen is defective. Thanks.

it doesn't means that impedance match cable/antenna is not needed for RX and impedance match transmitter/cable is not needed for TX. Such type of mismatch leads to signal loss. But this loss is not so

it doesn't related with volts or watts, impedance mismatch has the same poor effect for any volts and watts. Impedance mismatch just reduce signal level. But when you use cable, there is another issue

Bryan, I'm glad you persevered and didn't give up. Thanks for feeding back the steps you took to get your unit running again. I'm sure some other user will benefit from your experience. 73, Herb

did you tried to calibrate touchscreen? I mean touchscreen calibrartion, don't confuse with VNA calibration. See menu CONFIG => TOUCH CAL

Herb, I think I have the edy555 version 0.2.3 firmware working well with nanoVNA-Saver 0.1.2, now. I no longer see weird data errors on the nanoVNA display or in the nanoVNA-Saver 0.1.2 displays. I

Rune, I just tried the new band stop filter analysis and the data looks spot on (See attachment), The firmware version I'm using was also correctly identified in the "About.." box. The only thing I

Symptoms suggest that there is a break in one of the substrate of the resistive layer of the sensor. If there was an interlayer short circuit, the device would hang on the splash screen when turned

Thanks. Removed the cover plate. No trash. Still not working. It's got to be bad. Andy - W4KIL