From the link at the Wiki section:
It states that top frequency range is 900MHz:
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nanoVNA-H commercialized by Hugen reduced cost and enhanced usability
working LiPo
refined touch screen
better PCB layout, RF shielding
third harmonic operation 300-900MHz
Touchstone file export
standalone PC software
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According to this it seems the 1.5GHz top frequency for the H version was not implemented since the beginning, but was rather a later improvement? If so I would assume there might still be earlier legitimate H units out there being advertised as 900MHz top frequency, specially by non tech savvy sellers. Or am I wrong?
