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June 19, 2018 at 12:02 am #3723
The manual explains how to enter Service Mode. (It also warns you to be careful!) The first thing I did was scroll through the settings and photograph each with my mobile phone! If you have an accurate signal generator, the setting S Meter can be adjusted to change S Meter display. I HAVE NOT DONE THIS, I SIMPLY ECHO WHAT IS IN THE MANUAL. Good luck! Let us know how you did.