The 548B Microwave Frequency Counter 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. The frequency range is 10Hz to 26.5GHz.
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 600MHz/sec tracking speed
20MHz P-P FM tolerance up to a 10MHz rate
