Hi, a week back I got an H4, after initial playing with it I upgraded it to the v.0.8.4.7 fw. Nice!
I see an issue with it, however. With fully charged battery, not connected to PC, CH0 terminated with the stock coax and load, calibrated, range 50kHz-900MHz, it shows expected results after power-on, but after ~15minutes the information on the display gets weird.
The H4 still provides measurements, but the display shows something like this - see attached.
I do not know whether it comes from that fw version, or it is something with H4s hw.
I have not modified the H4s hw yet (ie. xtal + sdcard socket).
