JPS6079178U

JPS6079178U - Noise figure meter calibration device

Info

Publication number: JPS6079178U
Application number: JP17251983U
Authority: JP
Inventors: 忠近藤
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1983-11-08
Filing date: 1983-11-08
Publication date: 1985-06-01

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は雑音指数の基本概念説明図、第２図はＹファク
タ法の概念説明図、第３図は雑音指数計の回路構成図、
第４図は従来の雑音指数計校正装置の構成図、第５図は
従来のタイミングチャート図、第６図はこの考案の雑音
指数計校正装置の構成図、第７図はこの考案のタイミン
グチャート図である。図中、１５は雑音指数計、１７は信号発振器、２５は変
調器、２６は第１の切換回路Ａ１２７は固定減衰回路、
２８は第２の切換回路Ｂ１２９は可変減衰回路、３０は
切換制御回路である。尚、図中同一あるいは相当部分に
は同一符号を付して示しである。Figure 1 is a diagram explaining the basic concept of noise figure, Figure 2 is a diagram explaining the concept of Y-factor method, Figure 3 is a circuit diagram of the noise figure meter,
Fig. 4 is a block diagram of a conventional noise figure meter calibration device, Fig. 5 is a conventional timing chart diagram, Fig. 6 is a block diagram of a noise figure meter calibration device of this invention, and Fig. 7 is a timing chart of this invention. It is a diagram. In the figure, 15 is a noise figure meter, 17 is a signal oscillator, 25 is a modulator, 26 is a first switching circuit A127 is a fixed attenuation circuit,
28 is a second switching circuit B129 is a variable attenuation circuit, and 30 is a switching control circuit. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Claims

[Scope of utility model registration request]

A noise figure meter calibration device that uses the Y-factor method includes a signal oscillator that generates a continuous wave signal, a noise figure meter that generates a noise source gate signal, a fixed attenuation circuit, a variable attenuation circuit, and a noise figure meter that generates a continuous wave signal. a first switching circuit for alternately applying outputs to the fixed attenuation circuit and the variable attenuation circuit; a second switching circuit for alternately introducing the outputs of the fixed attenuation circuit and the variable attenuation circuit to the noise figure meter; a switching control circuit that controls the first and second switching circuits based on a gate signal, and the attenuation difference between the fixed attenuation circuit and the variable attenuation circuit corresponds to an arbitrary noise figure. A noise figure meter calibration device comprising: a modulator that generates a Y factor.