Paul,
It sounds as if you did not calibrate the Nano correctly and the PC app is getting corrupted data.
Please follow the various calibration instructions either on the forum Wiki or in the User Guide (Files section) and try again.
Thanks,Larry
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On Friday, December 6, 2019, 9:30:28 a.m. GMT-5, paul larner <quadzillatech@...> wrote:
I get a similar problem,for the first few mins the screen jitters all over the place,then settles down but i have no cursor on the polar or smith chart,its pretty much unusable as it is for me.
