On Fri, Apr 25, 2025 at 12:13 AM, Mihai wrote:
Is this useful and/or correct?
If so, it means that a measurement in dBuV can be used directly in a formula with AF (in dB/m) and formula is an addition, not a subtraction
? ?The technote is correct.? The antenna factor is added to the measured level to convert from dBuV to dBuV/m or V to V/m.
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Assuming LNA is disabled in TinySA, preamp gain is 0 dB?
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? ?Preamplifier gain refers to an external preamplifier.? The LNA is internal to the TinySA and its gain is automatically corrected for, so it is not a factor in the formula. Most likely you will need to enable the LNA or use an external preamplifier to lower your noise floor below whatever regulatory limit you are using.
? ?To correct for all factors in the above formula, create a compound table that includes antenna factor, cable loss and external preamplifier gain.
I one wants to convert from dBuV/m to V/m, there are formulas:
? ?No need to convert. Choose LEVEL:UNIT:Vrms and enter your compound table for the TinySA to display measured levels in V/m. Choose LEVEL:UNIT:dBuV and enter your compound table to display measured levels in dBuV/m instead.
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