电视机的中放通道
DESCRIPTION
电视机的中放通道. 中放通道在电视信号 处理流程中的位置. 中放通道的输入信号类型. 图像调幅中频信号 (载频 38MHz ,带宽 6MHz ) 色度副载波调幅中频信号 (载频 33.57MHz ,带宽 1.5MHz ) 伴音调频中频信号 (载频 31.5MHz ,带宽 300kHz ). 中放电路的输出信号类型. 全电视信号 色度副载波信号( 4.43MHz ) 第二伴音中频信号( 6.5MHz ) AGC 信号 AFT 信号. 中放通道的幅频特性. 中放通道的增益. 20~26dB. 60~66dB. 高频头. 中放通道. 20uV.
1 / 14
Download Presentation
电视机的中放通道
An Image/Link below is provided (as is) to download presentation
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.
Content is provided to you AS IS for your information and personal use only.
Download presentation by click this link.
While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
During download, if you can't get a presentation, the file might be deleted by the publisher.
E N D
Presentation Transcript
中放通道的输入信号类型 • 图像调幅中频信号 (载频38MHz,带宽6MHz) • 色度副载波调幅中频信号 (载频33.57MHz,带宽1.5MHz) • 伴音调频中频信号 (载频31.5MHz,带宽300kHz)
中放电路的输出信号类型 • 全电视信号 • 色度副载波信号(4.43MHz) • 第二伴音中频信号(6.5MHz) • AGC信号 • AFT信号
中放通道的增益 20~26dB 60~66dB 高频头 中放通道 20uV 2V 高频头与中放总增益:
AGC电路原理 输入变化60dB,输出变化不超过1.5dB
More Related