Which of the following is the correct conclusion about 1 millivolt measured across 75Ω?

When 1 millivolt (mV) is measured across a 75-ohm load, it can be converted to a power measurement in decibels relative to a millivolt (dBmv). The formula to convert millivolts to dBmv is given by:

[ \text{dBmv} = 20 \log_{10}\left( \frac{V}{\text{1 mV}} \right) ]

In this case, when we input 1 mV into the formula:

[ \text{dBmv} = 20 \log_{10}\left( \frac{1 \text{ mV}}{1 \text{ mV}} \right) = 20 \log_{10}(1) = 0 \text{ dBmv} ]

Thus, 1 millivolt across a 75-ohm load is equivalent to 0 dBmv. This conclusion is specific to voltage measurements, and understanding how voltage levels relate to this logarithmic scale is crucial in telecommunications and field tech work, as it enables technicians to interpret signal strengths and levels effectively.

Other choices do not apply because:

• Conversion to dBm requires additional calculations based on