Product reviews are not a Forum for two-way exchanges, inquiries, general discussions, complaints, help requests, product repairs or modifications. The faster processor and larger SRAM and Flash memory are eventually going to remove the bottle neck that is a limiting feature of the NanoVNA-H (v3.

All topics relating to the hobby are welcome here, from purchasing and building equipment, to operating techniques and activities, and everything in between. I have an H4 but if you took the time to read this short thread, you know I never used it and didn't find stable firmware for it until recently. the only caveat is that these analyzers may be hard to read in bright sunlight, so keep that in mind for field operations. In that case, my only criteria was firmware that didn't lock up requiring the VNA to be power cycled to recover.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. Too many people are frighten off by in-depth theory and mathematics when all that is needed to get started is a simplified explanation.

While on the subject of software, it looks like the NanoVNA-H4 maintains excellent backwards software command compatibility with the NanoVNA-H. With the firmware for the original NanoVNA being open source, I guess everyone felt they should start to have a whack at it. The benefits are larger SRAM 40KB from 16KB, larger flash 256KB from 128KB, faster CPU clock 72MHz from 48MHz, and floating point accelerator.The 103 third parties who use cookies on this service do so for their purposes of displaying and measuring personalized ads, generating audience insights, and developing and improving products. My 'H' model was sold by a chap in Ky and it arrived VERY fast and the 'H' models have a plastic case. Supplied with: 1 NanoVNA-H or Nanovna-H4, with calibration kit, 1 50Ω SMA dummy load, 1 SMA open circuit, 1 SMA short circuit, 1 USB Type-C power cable, 2 SMA Male RG316 15cm cables, 1 SMA female - SMA female adapter. I'm mostly interested in digital modes but antennas are pretty mysterious to me and I'm just trying to get the proper tools to make sense of them.