FREQUENCY/SPAN 45 Display Start FrequencyFrequency reading Set stop frequency Panel operation 1. Press the Frequency key. Frequency 2. Press F3 (Stop). Stop3 GHzF 3 3. Enter the value using the Numerical and Unit Keys, Arrow keys, and Scroll knob. BK SPdBEnterGHz /SecmSecMHz /kHz / Secμ Range 0.0kHz to 3.0GHz (start frequency ≤ stop frequency) * Arrow keys and Scroll knob resolution: step value Display Frequency readingStop FrequencyNote Center frequency and span settings automatically change according to start and stop frequency settings, and vice versa.