The dBm is a logarithmic measure of power compared to 1 mW, that means it is power dependent. It can be converted to a voltage, if the load impedance is known. Typically the impedance (load) is 600 ohms. Equation: Level in dBm: LP = 10 × log (P / 0.001)...
The output of a calibrated signal generator is usually expressed in either microvolts (µV) or dBm (decibels relative to one milliwatt in 50 ohms), or both µV and dBm. It is useful to have a feel for both forms of output level indication. One microvolt (1 µV) is 10-6volts,...