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Hi All. I am a newbie here and I need a manual for my new NanoVNA-H4 and also step by step instructions on how to calibrate and save the cal data. Frank

Nice results. I did the same experiment with a Hugen 2.3 and had to move to S21 measurements for accurate results on 1-30 MHz. Maybe, if I get around to it, I? will try these low/high resistance S11

It's also possible to post process the VNA data to do other things. Here's a chart of current gain vs frequency for the same 2N3904 at 10Vce and 10mA Ic. This chart is derived from the same dataset

I often use a lab VNA to measure and model semiconductors up to many GHz. These 2 port models work well in practice and a lot can be learned about a transistor from these measurements. In the plots

Sure - and people do that - sometimes as part of a research project or dissertation. Ultimately, what you do is look at what you need to measure, assess the uncertainty with your "50 ohm" equipment

VNA errors get high when the mismatch is also high; we try to calibrate them out but it is an imperfect process. When we needed to measure the impedances of large L-band power bipolar transistors,

I have had success on my Baofeng using a female barrow between the Baofend RP and a rubber duck with a normal BNC. Dave - WB6DHW

Across the 5MHz to 50MHz frequency range, it's still possible for a basic nanovna to make fairly accurate resistance measurements across a wide range of resistances using a basic s11 measurement. In

I have had problems when I have accidentally used RP connectors. Two female connectors back to back do not work.

I can't edit my posts, so a second post. What I understand, NanoVna asn other VNAs are optimised for 50 ohms, they have for instance 50 ohms impedance bridge inside.

"You can calibrate for any resistance" Sure. But if those things can be made would it improve accuracy, when measuring low and high impedances.

The test equipment standard in the RF/?wave industry is and has been for some time 50-ohms. No, others are not made. The TV industry may have a few dedicated instruments at 75 ohms, but that's about

You can calibrate for any resistance

Do we need a VNA for 5 ohms and an other for 500ohms. Are they possible. Lets forget about 5 or 500 ohms attenuators, coaxials and such. But would it help if VNA is made for other impedances.

Has anyone produced a structure map for V1.2.14 firmware? If so, where is it located? Thanks, - John

The wiki page Home ( /g/nanovna-users/wiki/12336/174009 ) has been updated by Ho-Ro <homuth-rosemann@...>. *Reason:* Mirror/clone of DiSlord's source repo with binaries of his

I provide unmodified bin and hex binaries of DiSlord's latest version in a branch of my clone, for version info just check the commit message - currently version 1.2.15:

I have the H version 3.5 older software has small screen.. H4 larger screen would be my choice for what we want to use it for. Other models have either no case or more rugged case and have extended

I might as well put in my .02 cents worth. I am pleased with the new Deeplec DeepVNA101. This is the current evolution of the VNA-F. It has the 4 inch screen and is more visible in the outdoor sun

Well, I bought the Seesii H4 v4.3 off Amazon, that came with everything needed and has a very good battery. I consider it a good purchase. I have not had one issue with it. -- -VA7WNW-