Joined in 2023 
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In the same ragtag manner I'm currently running a quick test of my GPSDO against the OCXO timebase of my 53132A counter that has been switched off for months. Set the frequency range: In the NanoVNASaver software, enter the appropriate start and stop frequencies for the measurement in the ‘Start Frequency’ and ‘Stop Frequency’ fields, respectively. Now I am going to see what it does via NanaVNA-Saver I had some problems at first start of this program yesterday. Calibrating the LiteVNA using sorted Mini-circuits load and the short, open, thru from the V2Plus4 kit.
Extended marker functionality has already been added which otherwise would not fit in the NanoVNA-H -AA memory space. Looking into the future I can see more measurement points, averaging and a fft bandwidth implementation. Even with the almost 3x the SRAM and 2x the flash memory it looks like the 101 scan point limitation is going to stay imposed to maintain backwards software compatibility, bummer. band is better than 40dB of dynamics;The metal shield is designed to reduce the external interference and improve the measurement accuracy. Libre_Lite_PNA_S21term_10GHz_10Avg: Sweeping the LiteVNA from 100kHz to 10GHz with the leakage term enabled, 2kHz IFBW (default) and 10 averages.
A separate charge pump to power the mixer and tantalum capacitors were added to reduce the power supply noise. The magenta trace is after removing the frequency offset against 10MHz and after correcting also the frequency drift - as mentioned, the 53132A was only recently switched on and it's reasonable to assume that it will drift for a while before settling.
GHz vector network analyser designed to measure reflection and transmission coefficients of equipment without the need for a large analyser. Some of talking head hams got the hardware for free to review but outside of unboxing it, that's about all you get. Looking at the last time I had tried to run a regression test on it, the H4 failed the standard deviation test but at a different frequency range. b. Select the appropriate serial port from the drop-down menu (you may need to try different ports if you’re unsure which one is correct). Some of these create more questions than they answer and require more analysis so don't just accept them as absolute truth.Given hugen's history I know he will quickly release a firmware fix, but this being the Chinese New Year will likely delay his response.
It's a nicer device if you plan to use it as a bench device since you have the native software and large screen. Quote from: MadTux on January 28, 2023, 06:13:25 pm Basic NanoVNA-F or H is good enough for learning, NanoVNA-F V2 if you want nice mechanical design, a bit more frequency range and better display. Due to their delicate construction they are better suited to use on a bench, as opposed to outdoor antenna work. Maybe I should make a video combing the NanoVNA as a signal generator and checking the crystal filter.I also included the quality issue that some members are experiencing with the case opening for the USB-C port. I have compared data results using it Up to 400Mhz and it's pretty decent compared to the E5061B I have at the office. Would you be so kind as to post a comparison of LiteVNA, NanoVNA-H4, NanoVNA-V2Plus4 and maybe some others in the frequency range 150kHz - 230 MHz? In the time since my first review, I have built a 4el VHF/7el UHF satellite beam and completed a VHF installation in the SUV. Thanks for confirming the issue and also for confirming that updating to the latest firmware version doesn't correct it.
A portion of all proceeds of this VNA is paid to the ttrftech team to continue and further NanoVNA development. I pulled the H4 from the plastic wrapper and I'll be dammed if it didn't still have a charge and powered right up. I’ve wound 8 turns of RG8X Mini8 coax on the ring to form a common mode choke to cover the HF spectrum. NanoVNA-H4 users who prefer features in QRP's or edy555's firmware updates are out of luck unless hugen merges those changes into his NanoVNA-H4 firmware branch.Even comes in the 'presentation/storage' box with all the accessories plus plectrum style stylus (which you don't get with most cloned units and wasn't shown in the sellers photo's! It turns out that one can convert the S11 phase to impedance-phase, with a caveat that the conversion is undefined near the 50-Ohm point - so expect poor accuracy everywhere nearby.
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