Additional Features: The frequency range is 10 Hz to 26.5 GHz Keyboard controlled frequency limit selection Power measurement to 0.1 dB resolution Power measurement accuracy to ±0.5 dB typical -30 dBm Sensitivity 200 Watt (+53 dBm) peak damage protection 10 dB automatic amplitude discrimination 200 ms acquisition time Up to 600 MHz/sec tracking speed 20 MHz P-P FM tolerance up to a 10 MHz rate The EIP Microwave 548B, Microwave Frequency Counter, that has automatic amplitude discrimination which enables the instrument to automatically select and measure the input signal with the highest level, and ignore all of the harmonics and other spurious signals that are present.