Revolving adjustable stepping equalizer, preparing technique and application

Abstract

In the invention, a shaft positioning mechanism structure is mounted on the shaft; the right portion of the shaft is sleeved into the axle center of the case; the left portion of the shaft passes through the hollow body of the case along axle center; the upper printed board of 0-15 db resistance attenuation network is mounted on the right portion of shaft; the one end of spring thimble mounted on the lower printed board at the bottom of the case is connected to a network node at certain attenuation stop in 0-15 db resistance attenuation network; when turning the twist grip, the attenuation value of each stop is led by the contact of three spring thimbles to form 16 different attenuation values in the range of 0- 15 db corresponding to relevant balancing value.

Description

[technical field] [0001] The invention relates to a passive equalizer, in particular to a rotary adjustable step equalizer, a preparation process and an application. [Background technique] [0002] Passive equalizers commonly used in CATV systems can generally be divided into two types: [0003] 1. Fixed equalizer; [0004] 2. Variable equalizer. [0005] The fixed equalizer has the advantages of clear and intuitive equalization value and stable value, but an equalizer can only have one definite equalization value. If it wants to cover all commonly used equalization values ​​(for example, 0-15dB), it must have 16 different values. The equalizer, which has caused inconvenience in production, when the equipment is debugged on site, sometimes the required equalization value cannot be found because there are not enough spare parts, which is its shortcoming. [0006] The variable equalizer has the advantage of continuously adjusting the equalization value, but the equalization...

AI Technical Summary

Problems solved by technology

[0005] The fixed equalizer has the advantages of clear and intuitive equalization value and stable value, but an equalizer can only have one definite equalization value. If it wants to cover all commonly used equalization values ​​(for example, 0-15dB), it must have 16 different values. The equalizer, which has caused inconvenience in production, when the equipment is debugged on site, sometimes the required equalization value cannot be found because there are not enough spare parts, which is its shortcoming

[0006] The variable equalizer has the advantage of continuous adjustment of the equalization value, but the equalization value cannot be directly displayed, and the required value must be obtained through calculation with the help of an instrument

It is very difficult to equalize the corresponding cable value and still maintain good linearity in the whole common range (such as 0 ~ 15dB)

And its internal carbon diaphragm is easy to wear after frequent rotation and may cause numerical instability, which is its shortcoming

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