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• 1 to 500 MHz and 450 to 950 MHz • Calibrated Output (+ 57 to - 33 dBmV) • Excellent Flatness and Linearity • Complete Crystal Marker System • Features for CATV Applications 1 to 950 MHz Frequency Range The solid state Model 1801B Sweep/ Signal Generator provides features and options ideally suited for the manufacturer of TV and CATV equipment and for the installers and operators of CATV systems. The optional 450 to 950 MHz range adequately covers the bands of the future. Calibrated Output The ultra flat (±0.25 dB, 1 to 500 MHz) 75Ω output system is calibrated from +57 to -33dBmV. A three position front panel level switch permits the output level to be increased or decreased by an identical fixed amount (internally adjustable to provide changes ranging from ±0.05 to ±0.5 dB). This feature aids in flatness measurements by providing an accurate, rapid calibration reference which is unaffected by the return loss of the test device or system. A dc block on the RF output prevents accidental equipment damage. Marker System The crystal controlled birdy marker system may be used to modulate (blank) the RF output so both sweep and markers are on a single cable. This is very useful for an accurate frequency indication when sweeping long lines or cable systems. Sweep Rate Versatility The Model 1801B will sweep at line frequency or as slow as 1 sweep in 100 seconds. In addition, a special sweep rate position provides a variable 1 to 10 ms sweep that repeats every 1 to 10 seconds. This is ideal for simultaneous sweep testing of operating cable systems with minimum subscriber interference. The Model 1801B may be used with any available sweep receiver. Special CATV Feature The Model 1801B can operate in conjunction with the Model 1075 or 1076 Comparator-Attenuator. When the Model 1075 is plugged into the Model 1801B the PIN diode attenuator is time shared with the equalization, tilt and 0.1 dB attenuator by the comparator. The Model 1801B will accept the tilt, notch Filter and pulse marker options that are very desirable in most CATV test applications.