Nanovna reset. There are many good instructions for NanoVNA on the nanovna-users group wiki page. BOOTLOAD mode can also be entered by holding down the “left” push button while the device is powered off and on. 8" NanoVNA-H firmware version is higher than 0. See section 5. You can download the pre-compiled software here. Other advertising links on the platform may sell bad clones. This will happen if the frequency range is changed after loading the calibration data. This Beginer's Guide is not a substitute for already great instructions, but a supplement for us complete beginners. pdf. Hope someone can help, unit nanovna-h4, Powers up ok grid lines vert and horz on screen,trace on top ,CH0 longmar, get home menuok but when touch to get sub menu screen goes back to start screen ,tried taking battery off wait and then reconnect no joy, how do I reset unit thanks for looking mike bennett Select RESET AND ENTER DFU to reset the device and enter DFU (Device Firmware Update) mode. vnmvk jsqht pcz tkzk ukj skogd thlblb santg znkmqzx cpdd