The AAF9 is a professional Radio Frequency (RF) measuring instrument. It excels at detecting and measuring all Radio Frequency signals between 1 MHz to 14 GHz. The AAF9 has the latest micro-IC components, pre-amplifiers, high frequencies filters and advanced circuiting that are by products of the wireless boon in electronics. It employs several stages of active detection (rather than a diode detector) giving it extraordinary sensitivity. The sensitivity of this instrument approaches that of a tuned receiver. Even with this high sensitivity, it still has broadband detection capabilities that enable it to measure all signals – irrespective of being spread–spectrum, frequency hopping, pulsing or trunking. High sensitivity is needed to detect the weak signals from covert milliwatt transmitters, cell phones and tiny hidden cameras. The newer 5.8 GHz and 2.4 GHz transmitting devices can be detected at greater than 10-20 feet (~3-6 meters) using the AAF9. This allows the quick and effective security sweeps of large conference rooms or small restrooms. Signal overload is avoided by using a logarithmic amplifier with 1000 to 1 dynamic signal range – making it easy to pinpoint the signal source at its exact location.