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Distro is very limited. Doesn't have -w either. I give up on Linux. I can't get the CD drive to load anything else or even to reload the Grml-small I had on there to begin with. I received my USB-A

You can still see what is going on without the "-H" option, the output is just a little less clear. Basically, run "dmesg -w", and then plug the USB device in, and you should see the system react to

Thanks, I was wondering if that was the cause. I just picked up my ipad to check the syntax but saw your message first. Greml small was suggested so that is what I loaded. I am running on an old xp

Looks like a distro with crippled dmesg . . . . the man page clearly states "-H: Human readable output" and "-w: wait" so the options *should* be valid.

Actual response is Invalid parameter, I think

Hope this isn’t considered off topic. It is about troubleshooting a NanoVNA. Finally got the greml distro working. When I enter the string you suggested it says -H is unrecognized.

You nailed it. I was looking at S11 phase and not S21 phase. Thank you! John W1FV

Lawrence, The dfu_util command works exactly the same for NanoVNA-H and -H4 as for tinaSA and tinySA Ultra. Both families use exactly the same STM32 processor (the small STM32-F072, the larger

On Thu, Jan 26, 2023 at 08:50 PM, Al Waschka wrote: Al, You could download a "live" image, no installation required. For your HW this small "rescue-linux" should be ok: https://grml.org/download/ -

Murphy is a ham also…. However he gets on the air and into my set very sporadically. Usually similar to the trouble shooting suggestions in the latest Ham Radio Workbench podcast. Remember to check

Hi Marc, Just a heads up. It is possible that static on your antenna crisped your NanoVNA. It is really good practice to short your antenna cable before connecting it to your Nano VNA. Also be very

John, Are you sure that your phase trace is looking at S21 phase and not S11 phase? --John Gord

I'm running into an issue trying to calibrate my NanoVNA H4 so that I can run S21 scans. I've done the calibration two ways: (1) using the NanoVNA-saver software and (2) using the on-screen menu on

The standards by their nature are delicate, as the manufacturer attempts to minimize parasitic capacitance/inductance. This often results in mechanically less-than-robust construction. This mechanical

Thanks, The question is which statement in the manufacturer's brochure is incorrect. But the "other cable" is the one that came with the NanoVNA and it worked a few minutes prior to the point at which

Hi, In point 8 you say that the new cable is identified as a "charging cable" and this type of cable is only for charging but not for data transfer. After that you say that in the description they say

hah, and I just sent a suggestion - yeah, it happens. And to someone with your callsign, how ironic. I've had more than one 50 ohm load turn into an open - or what's worse, 50 ohms at high

If you clear the calibration (reset), so it's totally uncalibrated, what does it show? It should show S11 fairly low with a load, and close to zero with either open or short. If it does, then check

Chronology of the Problem 1. Unpacked NanoVNA ordered from eBay vendor as a non-H unit, powered up and operated, including calibration, configuration, and testing an existing antenna system until the

I would think that someone with a call like yours would have checked the load first! (Just kidding!)