Three important parameters to be verified in an FM transmitter are:

Operating an FM transmitter legally and efficiently requires monitoring three key parameters. First, output power must be verified to ensure it is within legal limits and sufficient for communication without overloading the final amplifier. Second, frequency deviation must be strictly controlled; excessive deviation causes the signal to exceed its allocated bandwidth, resulting in adjacent channel interference (splatter). Finally, frequency stability is crucial to ensure the carrier remains exactly on the assigned centre frequency, preventing drift into neighboring channels. Distracters include parameters like "carrier suppression" or "sideband power," which are relevant to Single Sideband (SSB) transmitters, not FM. Similarly, linearity is highly critical for AM and SSB amplifiers, but not for FM transmitters since FM relies on a constant amplitude carrier.