Output Power - NanoVNA V2 Forum

Beware of cheap underperforming clones

As of 2022 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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Output Power

jmssix 2020/08/01 21:45

ADF4350 has 4 output power levels: 5, 2, -1, -4 depending on DB7 DB6 of R4.

The code hard codes the following for the rx and tx
adf4350_rx.rfPower = 0b00;
adf4350_tx.rfPower = 0b11;

which is -4 for RX and 5 for TX.

For amplifier testing, it is good to be able to move down in TX power level.

The VNA_QT app has power setting but currently does nothing for NanoVNA V2.

Can user selectable tx output power be implemented, even if it is only available with ADF4350 operation?

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