TUNING SYSTEM FOR ACHIEVING QUICK ACQUISITION TIMES FOR A DIGITAL SATELLITE RECEIVER
    2.
    发明申请
    TUNING SYSTEM FOR ACHIEVING QUICK ACQUISITION TIMES FOR A DIGITAL SATELLITE RECEIVER 审中-公开
    用于实现数字卫星接收机快速获取时间的调谐系统

    公开(公告)号:WO1997038489A1

    公开(公告)日:1997-10-16

    申请号:PCT/US1997005667

    申请日:1997-04-04

    CPC classification number: H03J5/0281 H03J7/065

    Abstract: The RF signals received from the LNB and the corresponding IF signal produced by the tuner may be offset in frequency due to reasons other than a frequency drift of the oscillator of the LNB, such as satellite transponder frequency adjustments made by the satellite transmission system. A tuner (9) includes a local oscillator (911) controlled by a controller. The controller (a) controls the frequency of the local oscillator (911); (b) stores digital nominal frequency representative words for respective ones of RF signals received; (c) stores digital offset representative words for respective ones of the RF signals; (d) determines a frequency offset of said carrier signal after an RF signal has been tuned; (e) updates all of the digital offset representative words in accordance with the frequeny offset of the carrier; (f) derives the tuning representative word for an RF signal selected to be tuned by combining said nominal frequency representative word for the RF signal selected to be tuned with the previously updated offset representative word for the RF signal selected to be tuned; and (g) updates the respective digital offset representative word for an individual RF signal presently being tuned if correct tuning is not achieved with the previously updated offset representative word.

    Abstract translation: 由LNB收到的RF信号和由调谐器产生的对应的IF信号可能由于诸如由卫星传输系统进行的卫星转发器频率调整的LNB的振荡器的频率漂移以外的原因而在频率上偏移。 调谐器(9)包括由控制器控制的本地振荡器(911)。 控制器(a)控制本地振荡器(911)的频率; (b)存储接收到的各个RF信号的数字标称频率代表性字; (c)存储针对各个RF信号的数字偏移代表字; (d)在RF信号被调谐之后确定所述载波信号的频率偏移; (e)根据载波的频率偏移来更新所有数字偏移代表字; (f)通过将被选择调谐的RF信号的所述标称频率代表字组合为被选择调谐的RF信号的先前更新的偏移代表字来导出被选择调谐的RF信号的调谐代表字; 以及(g)如果不是用先前更新的偏移代表词来实现正确的调谐,则更新当前正被调谐的单个RF信号的相应的数字偏移代表字。

    SYSTEM AND METHOD FOR RECEIVING MULTIPLE CHANNELS
    3.
    发明申请
    SYSTEM AND METHOD FOR RECEIVING MULTIPLE CHANNELS 审中-公开
    用于接收多通道的系统和方法

    公开(公告)号:WO2006118722A1

    公开(公告)日:2006-11-09

    申请号:PCT/US2006/011818

    申请日:2006-03-29

    CPC classification number: H04B1/18

    Abstract: The disclosed embodiments relate to a system (200) and method (400) for receiving multiple channels in a communications receiver. The system (200) includes a first module (206) further including an analog to digital converter (210) for converting an input signal to a first and second digital signal and a first processor (220, 230, 240) for processing the first digital signal, and a second module (256) further including a second processor (260, 270, 280) to process the second digital signal. The method (400) involves receiving an analog signal (402), converting the analog signal to a first and second digital signal (404), passing the first digital signal through a first interface (406), processing the first digital signal to a produce a first plurality of output signals (408), passing the second digital signal through a second interface (410), and processing the second digital signal to produce a second plurality of output signals (412).

    Abstract translation: 所公开的实施例涉及用于在通信接收机中接收多个信道的系统(200)和方法(400)。 该系统(200)包括第一模块(206),其还包括用于将输入信号转换为第一和第二数字信号的模数转换器(210)和用于处理第一数字信号的第一处理器(220,230,240) 信号,以及还包括第二处理器(260,270,280)以处理所述第二数字信号的第二模块(256)。 方法(400)包括接收模拟信号(402),将模拟信号转换为第一和第二数字信号(404),使第一数字信号通过第一接口(406),将第一数字信号处理成产品 第一多个输出信号(408),使第二数字信号通过第二接口(410),并处理第二数字信号以产生第二多个输出信号(412)。

    APPARATUS FOR VERIFYING A LOW NOISE BLOCK OUTPUT VOLTAGE
    4.
    发明申请
    APPARATUS FOR VERIFYING A LOW NOISE BLOCK OUTPUT VOLTAGE 审中-公开
    用于验证低噪声块输出电压的装置

    公开(公告)号:WO2005120073A1

    公开(公告)日:2005-12-15

    申请号:PCT/US2004/016864

    申请日:2004-05-27

    CPC classification number: G01R31/2825

    Abstract: The present invention relates to system diagnostic circuitry for antenna systems with active antenna components. More specifically, the present invention discloses an apparatus comprising a connection (710) between an antenna and a power supply conducting a first DC voltage, a source of a pulse width modulated signal (730), a lowpass filter for converting (R3, C1) the pulse width modulated signal to a second DC voltage, and a comparator for comparing (740) the first DC voltage and the second DC voltage and generating an output signal responsive to the difference between the first DC voltage and the second DC voltage.

    Abstract translation: 本发明涉及具有有源天线部件的天线系统的系统诊断电路。 更具体地说,本发明公开了一种装置,其特征在于,包括在天线与导通第一直流电压的电源之间的连接(710),脉冲宽度调制信号源(730),低通滤波器(R3,C1) 脉冲宽度调制信号到第二直流电压,以及比较器,用于比较(740)第一直流电压和第二直流电压,并响应于第一直流电压和第二直流电压之间的差产生输出信号。

    PRODUCTION LINE BOOT SECTOR LOCK
    8.
    发明申请

    公开(公告)号:WO2003079753A3

    公开(公告)日:2003-10-02

    申请号:PCT/US2003/008354

    申请日:2003-03-19

    Abstract: Hacking of a class of Set-Top Boxes known as Integrated Receiver-Decoders (IRDs) used to receive satellite broadcasts for display on television sets is prevented by use of connections to the reprogramming enable pin (22) of a flash memory (12). If a user attempts to reprogram the boot sector of the flash memory (12) in order to obtain free services via piracy, the set-top box is destroyed. The invention relates to the design and manufacture of IRDs that are resistant to hacking via unauthorized reprogramming.

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