100 Hz to 1.8 GHz, Programmable Spectrum Analyzer Features Covers 100Hz to 1.8GHz with -130 dBm Sensitivity and +/-1 dB Frequency Response 10¯9 Marker and Center Frequency Accuracy, Built-in Signal Counter; External Reference Input with Option 05: 10¯5 Frequency Accuracy with the standard 495/495P Front Panel Execution of Downloaded Programs with the 495P Option 05 Intelligent Markers with Signal Processing Functions Pushbutton Occupied Bandwidth and Noise Normalization Functions Switch Selectable 50 ohms and 75 ohms Impedance (Option 07) for IF, CATV and Local Area Network Applications Nonvolatile Memory for Up to Nine Waveforms and Nine Front Panel Settings Direct Keypad Entry of Control Parameters Help Mode Explains Front Panel Controls and Signal Processing Functions at the touch of a button