Method and apparatus of performing video programming security control
    11.
    发明授权
    Method and apparatus of performing video programming security control 有权
    执行视频编程安全控制的方法和装置

    公开(公告)号:US08693944B2

    公开(公告)日:2014-04-08

    申请号:US13232060

    申请日:2011-09-14

    CPC classification number: H04K3/42 H04K2203/14

    Abstract: Disabling data channels at a customer premises provides, in one embodiment, generating at least one jamming signal and inserting the at least one jamming signal at a first frequency to jam at least one carrier frequency channel. The jamming signal may be hopped to at least one additional frequency different from the first frequency to jam at least one additional carrier frequency channel.

    Abstract translation: 在一个实施例中,禁用客户驻地的数据信道在一个实施例中提供至少一个干扰信号并以至少一个干扰信号以第一频率插入以阻塞至少一个载波频率信道。 可以将干扰信号跳到与第一频率不同的至少一个附加频率以阻塞至少一个附加载波频率信道。

    Laser bias and modulation circuit
    12.
    发明授权
    Laser bias and modulation circuit 失效
    激光偏置和调制电路

    公开(公告)号:US5488621A

    公开(公告)日:1996-01-30

    申请号:US158166

    申请日:1993-11-24

    CPC classification number: H01S5/06832

    Abstract: Constant light output is provided by a laser diode over various temperatures or operating points by adjusting the bias current in accordance with a midpoint of a detected peak and a detected valley of an output power level and adjusting the modulation current amplitude in accordance with the difference between the detected peak and the detected valley output power.

    Abstract translation: 通过根据检测到的峰值的中点和检测到的输出功率电平的谷值调整偏置电流,通过激光二极管在各种温度或工作点上提供恒定的光输出,并且根据其中的差异来调整调制电流幅度 检测到的峰值和检测到的谷值输出功率。

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