The Wavetek 1000 Series Sweep/Signal generators are single band instruments covering the frequency range from 500 KHz to 1.4 GHz. All units utilize the same, Front Panel, Harness and Power Supply with the balance of the circuits contained in Plug-In Modules. However, it is not intended that one model be converted to another. The plug-in concept simplifies maintenance problems and provides marker circuits which can be customized to specific applications. A Rear Panel Con nector permits remote programming of Center Frequency, Sweep Width and Output Level, plus. External Amplitude and Frequency Modulation.