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Hi Cesar - I suppose that your issues are related, and I suggest that the problem is/was corrupted calibration data area which has been my experience with first calibrations with some new firmwares.

Thanks Herb for confirming my suspicion. I've looked at the specs once again: VSWR: 1.05 + 0.008 f (GHz) max @ DC - 18.0 GHz, 1.30 max @ 18 - 26.5 GHz so I would expect 1.30 at frequencies above

Hello Rudi, hello Oristo, thank you very much for your reply! If I use i.e. RG58 with a length of abt. 1m I don't see the problem as well due to the high loss of this cable (RG58 1m.jpg). But if you

Hi all, I just got my NanoVNA-H 3.4 (official version via alibaba/Maggie). Generally it works quite well, but I find two issues: 1) SWR reading shows always 1 across the entire sweep range, from 50kHz

Hello all, Just flashed firmware 0.60 by Edy555 in my NanoVNA ( https://github.com/ttrftech/NanoVNA/releases ) and advise is clear "config" NanoVNA. I searched in the menu and manual of the NanoVNA

On Sat, Jan 25, 2020 at 10:01 PM, Bob Albert wrote: "... When I measure 50 Ohm coaxial impedance with the 1/8 wave method, I always get 50 Ohms. I tried some 75 Ohm cable and still get 50 Ohms!.."

Bob, On a 50 ohm Smith chart, the bottom (6 o'clock) location will always be -j50 ohms. The trick to measuring the cable impedance is to adjust the CW test frequency so that an open cable measures as

wrote: Did you fit a battery before trying to use it, or just use it on a USB power adapter? Dave. Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...

On Sat, Jan 25, 2020 at 09:51 PM, <tonyg1hmo@...> wrote: I saw the 'save'menu item but as it was under 'cal' I wongfully assumed that it would save just the calibration. I have just saved a cal

My company makes VNA calibration kits. I don't measure the DC resistance at all - I just ensure that the return loss meets its specifications. I see so many people on here believing that they are

On Sat, Jan 25, 2020 at 07:55 PM, Larry Rothman wrote: Hugen's H4 unit with the 4 inch display already has a serial port available in addition to the USB for use with additional peripherals like wifi

When I measure 50 Ohm coaxial impedance with the 1/8 wave method, I always get 50 Ohms. I tried some 75 Ohm cable and still get 50 Ohms! When I use my old method of adjusting the termination it works

Thanks Herb, that works perfectly. I saw the 'save'menu item but as it was under 'cal' I wongfully assumed that it would save just the calibration. I have just saved a cal and settings for 1.6 -

Hugen's H4 unit with the 4 inch display already has a serial port available in addition to the USB for use with additional peripherals like wifi and Bluetooth dongles.? The only problem at this time

Here is a feature idea for the next update of the NanoVNA design. If the NanoVNA had a WiFi transceiver on board in addition to the USB port, so it could be controlled remotely by NanoVNA Sharp,

On Sat, Jan 25, 2020 at 03:24 PM, Nigel Gunn, G8IFF/W8IFF wrote: " Or recomment they use Linux and not Windows. Then they don't need any ST files. They will already have the needed software."

On Sat, Jan 25, 2020 at 03:58 PM, Jos Stevens wrote: I did what you suggested , removed the portsavers re-calibrated the standalone VNA,the result was better then before 0.00 db, +0.12 and -0.25 at

On Sat, Jan 25, 2020 at 03:10 PM, Larry Benko wrote: Making reasonable quality loads is not difficult.? See https://youtu.be/-PK9Bn7Ixnw if interested.

Herb, I did what you suggested , removed the portsavers re-calibrated the standalone VNA,the result was better then before? 0.00 db, +0.12 and -0.25 at 50k, 750M and 1500M. Then I calibrated in

Or recomment they use Linux and not Windows. Then they don't need any ST files. They will already have the needed software.