Abstract

This chapter describes a panoramic wavemeter and it serves for observing the spectrum of continuous high-frequency oscillations over a wide range of wavelengths. The scan on the screen of the oscillograph corresponds to a band of wavelengths up to 12 cm, and the range of measurements is from 5 to 50 cm. The wide-range wavemeter is based on a mechanically tuned quarter-wave coaxial resonator whose axial conductor is being moved backwards and forward by a motor. This mean value and the amplitude of oscillations determine the wavelength range in which the spectrum is observed, the beam scan on the oscillograph being in phase with the tuning of the wavemeter. The vertical deflection of the beam is determined by the signal from the detector. The oscillograph scanning voltage is derived from a synchronous generator located at the other end of the shaft of the motor. It consists of the armature and the stator coil. The scanning generator is connected to the oscillograph through a correcting phaseshifter.

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