A typical power meter is capable of measuring power levels ranging from _____.

In wireless communications, power meters are essential tools for measuring the power levels of signals in a variety of scenarios, including testing and troubleshooting. The correct range of power levels a typical power meter can measure is typically from -70 dBm to +45 dBm.

This range is suitable for most wireless applications, as it accommodates very weak signals often found in environments with significant noise or interference, while also being able to handle stronger signals that might be encountered in more powerful transmission systems. The lower end of the range, -70 dBm, allows for the measurement of signals that are at the threshold of detection, which is crucial for assessing the sensitivity of receivers. The upper end, +45 dBm, covers signals from strong local sources and can be very useful in characterizing or ensuring compliance with power levels in transmission systems.

While other options might suggest different ranges, they either don't cover sufficient weak signal levels or extend beyond normal operating parameters for typical wireless communication equipment.