Abstract
To study another octave of the solar radio-frequency spectrum, a new superheterodyne receiver using a video-frequency IF was developed. This receiver scans the 2000- to 4000-Mc octave in 0.1 sec by using a backward-wave oscillator as the local oscillator. A carefully designed balance mixer converts the incoming signal directly into a video signal, where it is amplified and displayed as an intensity-modulated trace on a high-resolution cathode-ray tube. The receiver has an average noise figure of 13.0 db, and a total gain variation of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\pm2</tex> db over this octave. The receiver features power output stabilization of the local oscillator, a 2000- to 4000-Mc noise source, and highly stable video amplifiers.
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