A rotary step attenuator and its manufacturing process

Abstract

The invention relates to the technical art of passive attenuators and specifically relates to a rotation type step attenuator and a production process thereof. The rotation type step attenuator comprises a bottom printed board, a three-reed connector assembly, an upper rotation printed board, a belt shaft face gear, an end face positioning reed and a shell shaft sleeve and is characterized in that the three-reed connector assembly is arranged on the bottom printed board, the upper rotation printed board is disposed at the top of the bottom printed board, a reed at the top of the three-reed connector assembly contacts with a resistance attenuation network electrical contact spot welding disk at the bottom of the upper rotation printed board, the belt shaft face gear is arranged at the top of the upper rotation printed board, a rotation shaft is mounted at the bottom of the belt shaft face gear, and the bottom of the rotation shaft is inserted into round holes of the upper rotation printed board and the bottom printed board. Compared with rotation type step attenuators in prior art, the rotation type step attenuator has the advantages that sixteen kinds of attenuation values are integrated in one attenuator, so that great convenience is brought to production and field debugging of devices; and the rotation type step attenuator has the advantages of being novel in structure, complete in function, small in size, reasonable in mechanical structure design, convenient to process, and applicable to mass production.

Description

[technical field] [0001] The invention relates to the technical field of passive attenuators, in particular to a rotary step attenuator and its preparation process and application. [Background technique] [0002] Passive attenuators commonly used in CATV systems can generally be divided into two types: [0003] 1. fixed attenuator; [0004] 2. variable attenuator; [0005] The reason why passive attenuators are widely and widely used is that compared with active attenuators (active attenuators usually use PIN tubes or integrated circuits), they have small insertion loss, good impedance matching, simple operation, No additional hardware control circuit or software control program is needed, easy to replace, no nonlinear distortion when the signal is large, and the price is low. [0006] Fixed attenuators have the advantages of clear and intuitive attenuation values ​​and stable values, but an attenuator can only have one definite attenuation value. If you want to cover a...

AI Technical Summary

Problems solved by technology

[0006] Fixed attenuators have the advantages of clear and intuitive attenuation values ​​and stable values, but an attenuator can only have one definite attenuation value. If you want to cover all commonly used attenuation values ​​(such as 0-15dB), you must have 16 different values. The attenuator, which caused the required attenuation value to be found sometimes because there were not enough spare parts during the on-site debugging of the equipment

[0007] The variable attenuator has the advantage of continuously adjusting the attenuation value, but the attenuation value cannot be directly displayed, and the required value must be obtained with the help of an instrument, and its internal carbon diaphragm is easy to wear after frequent rotation, which may cause inaccurate values. Stablize

[0008] The patent document with domestic patent number CN101093906 discloses a rotary adjustable step attenuator and its preparation process and application. Can't be mass-produced

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