I have seen in an (old) source code firmware and in an old message on
this list that writing on the 0x40 register address will (maybe) change
the output power of the (TX?) ADF4350 according to its datasheet
(-4dBm,-1dBm, 2dBm and 5dBm)... and for f>137,5 MHz if I'm right.
I tried that and look at the fwd0 output level after a sweep reading. It
doesn't seems to change anything.
Is there any means to change the output level by a similar way, or my
comprehension of this parameter/behavior is wrong ? Maybe the output
level is hard coded in order to have the same between the ADF4350 and
the SI5351 ?
Yohan Le Diraison
Beware of cheap underperforming clones
As of 2023 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.
See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.
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NanoVNA v2plus4 / 4pro : output level
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