Re: NanoVNA-V2 from Tindie
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Hi Herb
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Thank you for the info. I envy you guess which are capable on programming. Over many years I have bought books and developement kits and so on. I normally get stuck when reaching to the point I see "hello World" on the screen. ? My brain is hardware oriented. Indeed we owe Gabriel a lot of credit for this fantastic product. The NanoVNA -QT work also great for a full S11/S22/S21/S12 measurement by capture S*1. and swapping the DUT direction while capture s*2 and then exported to a S2p file. Both the s1p and s2p files are to import in NanoVNA saver as a measurement of a background so the limited scale settings for the NanoVNA-QT are easy to cope with. I will do some more test when done with some investigation of BNC adaptor as seen on the image. It is nice to have enough HP adaptors - the lasted purchase the HP11854A 50 ohm N to BNC kit ? Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] <[email protected]> P? vegne af hwalker Sendt: 20. april 2020 01:30 Til: [email protected] Emne: Re: [nanovna-users] NanoVNA-V2 from Tindie On Sun, Apr 19, 2020 at 02:28 PM, Kurt Poulsen wrote:
... Else it works great see attached responses for a WiFi channel filter measured from 100KHz to 3.5GHz imported as a S2p file generated by NanoVNA-QT to NAnoVNA-saver ... ========================================================================= Kurt, I've been very impressed with the stand-alone measurement capabilities of the S-A-A-2. Gabriel did a top-notch job in designing it. Just a year ago I wouldn't have expected a 3 GHz VNA with a display and USB control to be available for less than $100. Both S-A-A-2 production runs have sold out within a couple of weeks of being offered for sale. There have been a couple of firmware bugs that Gabriel has said she will address, but overall she hasn't made any major mis-steps. I sometimes entertain myself by writing small Python scripts to pull in data and manipulate it using the numpy library. My primary beef with the S-A-A-2 is you lose the display when you start communicating with it remotely. Not a problem with NanoVNA-QT or NanoVNA-Saver because of their graphical displays, but a major pain when you are writing scripts and just want to remotely change operational parameters without using a stylus or onscreen keyboard. My other minor beef is after you quit NanoVNA-QT or NanoVNA-Saver you have to cycle power on the S-A-A-2 to regain manual control of it. That seems a little wonky to me. Measuring 60 dB down on a 2.4 GHz filter surpasses my expectations for a sub $100 VNA or SNA. I've measured some 20 dB and 40 dB HP attenuators with the S-A-A-2 and they were spot on up to 3 GHz. The same attenuators measured using the NanoVNA-H4 and NanoVNA-F began to deviate around 1.3 GHz. I haven't tried importing any touchstone files created by the S-A-A-2 into NanoVNA-Saver. I've currently been beta testing Holger's branch of NanoVNA-Saver for the S-A-A-2 and have not been able to achieve a accurate through calibration. All other NanoVNA-Saver functions appear to be working as expected on my Windows 10 set-up. Holger works off of a Linux set-up so trying to trouble shoot any Windows related issues are problematic for him. Regards, - Herb |
Kurt Poulsen
