On Wed, Jan 15, 2020 at 06:32 AM, <erik@...> wrote:
I hate to have people complain about noise when Hugen did everything to prevent....
Will propose an option to unlock the 1.5 till 2.1GHz range for users that know what they are doing.
The github code base has everything in it to reach 2.1GHz, you have to uncomment in SI5351.c the part that switches to 7/9 harmonic mode and in the main file set STOP_FREQUENCY to 2100000000
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In his tweeter feed edy555 noted that the power output of the NanoVNA-H v3.4 has been increased to 0 dBm.
Via Microsoft Translate:
" Recently Hugen's hardware has a high output level and room for DR, and it barely looks up to about 2.3G, so the frequency range is secretly enlarged (up to 2.7GHz). "
Translation was not very good but basically says that with the NanoVNA-H v3.4 higher level output, measurements are barely useable to 2.3G with increased noise level. So edy555, in his Jan 18 2020 0.6.0 firmware release, secretly enlarged the top end frequency to 2.7 GHz.
As erik noted, the range above 1.5 GHz is not supported and you are on your own up there. Expect plenty of noise and just maybe a few useful measurements.
- Herb
