The 1801A CATV Sweep Signal Generator provides features ideally suited for the manufacturer, installers, and operators of CATV systems. Covers the wide frequency range from 1 to 500MHz and will sweep each band in its entirety, or sweep width may be continuously reduced to CW operation. Ultra Flat 75-ohm output system, calibrated from -33 dBmV to +57 dBmV (20 dB of the total attenuation is continuously variable). Features include built-in RF detector, external leveling circuitry, and a complete crystal-controlled birdy marker system.