The Model 267 is a dual mode Pulse/CW TWT Amplifier which has been designed to operate TWT's up to 80 watts in the 18 to 26.5 and 26.5 to 40GHz frequency ranges. The RF output pulse is generated by the focus electrode(grid) pulse. CW opearations may be selected by a discrete signal or by the application of +5VDC on the pulse input terminal. RF output pulse is controlled by the input video pulse. Internal power supplies are DC-DC converter designs with fast loop response times so that output level variations are minimal for any PRF including a non-periodic or burst type PRF. The modular power supplies and grid pulse generator have very low ripple, with attendant low phase noise in the TWT Amplifier. The modular design of the Model 267 provides convenient accessibility to all elements in the TWT Amplifier. Plug-in PC boards are accessible through the front panel. The PC card cover contains a legend for PC card located test points and controls. High voltage modules are encapsulated, plug-in assemblies. There is no exposed high voltage. Duty Cycle up to 50% Pulse or CW. Pulse Width Range 50 ns to CW. PRF Range 100kHz. RF Rise/Fall Time 15 ns, max. RF Pulse Droop ,+/-0.1 dB, max. Delay, Input to RF 200 ns, max. Phase Noise ,+/-1 degree pk to pk. RF Connectors - waveguide. Primary Power 120/220/240 VAC. +/- 10%, 50/60 Hz. Operating Temperature 0 to 50 degrees C. Weight: 90 pounds, nominal, 8.75 x 19 x 28.5 inches.
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