Richard,
All the original nanovna, h and h4 units will do TDR.?
How are you trying to flash new FW?? Are you using the defuse utility? If yes, get my modified exe file from the forum's file area and install that as the meanings of the buttons are more understandable.?
Also, throw away the flash ROM you have and redownload a new copy as you've most likely dumped your flash instead of updating it.?
... Larry
On Thu., 24 Jun. 2021 at 9:09 p.m., Richard -- N7WFK<rdykstra82@...> wrote: I think I have one of the original NanoVNA's because I can't do the TDR option with mine and I have tried to do firmware updates to it and that feature still won't appear. Is it just selected few models of the NanoVNA that do the TDR option or can all of them do it? I am just wondering before I go and buy another one so that I have that feature. I have no idea what version I have because everytime I turn it on the screen goes so fast I can't see what the version is.
