公开(公告)号：WO1992005601A1

公开(公告)日：1992-04-02

申请号：PCT/US1991006742

申请日：1991-09-17

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  BRYAN, Richard, H.

IPC: H01Q03/00

CPC classification number: F42B35/00 ,  H01Q3/02 ,  H01Q19/17

Abstract: Systems and methods for simulating electromagnetic environments to be encountered by a moving object such as a missile (14) are disclosed. The systems include compact ranges in 'hardware in the loop' ('HIL') simulating as projection system (10) to provide a cost- and space-efficient way for testing the performance of missiles and other objects. The systems disclosed may include mobile (62) or stationary (146, 150) compact ranges and may use lenses (70) or reflectors (186) in connection with an array (170) of one or more feed horns (66) to convert spherical or 'near field' wavefronts to plane waves within designated 'quiet zones'. If mobile ranges are employed, such ranges may be mounted on the flight tables (82) used for repositioning the missile seekers during the simulations. Also disclosed are systems for varying the amplitude and phase characteristics of the energy provided to an array of two or more feed horns in order to vary the apparent angle of received electromagnetic energy at electronic speeds. Typically, the number of feed horns used in varying the apparent angle of arrival is small (e.g. three). However, the small group may be part of a larger array in which switching is used to select one or more groups.

公开(公告)号：WO1991015065A1

公开(公告)日：1991-10-03

申请号：PCT/US1991001842

申请日：1991-03-20

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  BEYERS, Robert, John, II ,  BRAMHALL, Charles, Robert ,  DURDEN, Gregory, Steven ,  EDWARDS, Robert, Jay ,  HAMAN, Ray, Thomas, Jr. ,  HODER, Douglas, John ,  HUNTLEY, Donald, Randolph ,  KENNEDY, John, Anson ,  McGINTY, Emory, L., Jr. ,  McMULLAN, Jay, Cauthern, Jr. ,  NADDOR, David, Jonathan ,  SCHAUBS, Randolph, James ,  STILL, Jesse, Monroe ,  WEST, Lamar, Edwin, Jr. ,  WASILEWSKI, Anthony, John ,  WHITE, Donovan, Steve

IPC: H04J01/00

CPC classification number: H04N21/44222 ,  H04L27/2035 ,  H04N21/25891

Abstract: A method of transferring a data message from a remote unit (120) to a central location (110) is provided. A plurality of data channels is selected for transmitting the data message from the remote unit (120) to the central (110) location. At least one random transmit time is generated for transmitting the data message for each of the plurality of data channels. The data message is transmitted over the plurality of data channels at the transmit times. An apparatus for transferring a data message from a remote unit (120) to a central location (110) is also provided.

公开(公告)号：WO1991015064A1

公开(公告)日：1991-10-03

申请号：PCT/US1991001847

申请日：1991-03-20

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  McMULLAN, Jay, Cauthern, Jr. ,  NADDOR, David, Jonathan ,  BEYERS, Robert, John, II

IPC: H04H01/02

CPC classification number: H04N7/17309 ,  H04H20/12 ,  H04H60/22 ,  H04H60/97 ,  H04H2201/70 ,  H04L5/06 ,  H04L25/4904 ,  H04L27/2276 ,  H04N7/10 ,  H04N21/25891 ,  H04N21/44222

Abstract: A method of controlling the allocation of a population of remote units (120) among a plurality of groups of remote units (120) is provided. Each remote unit (120) has a digital identifier respectively associated therewith. A maximum and a minimum average number of remote units (120) per group is fixed. The remote units (120) are assigned to the groups of remote units (120) in accordance with the respective digital identifiers. The average number of remote units (120) per group is then determined as remote units (120) are assigned thereto. Next, the average number of remote units (120) per group is compared to the fixed maximum number of remote units (120) per group. The above steps are repeated while the average number of remote units (120) per group is less than or equal to the fixed maximum number of remote units (120) per group. The number of groups is changed such that the average number of remote units (120) per group is between the fixed maximum and minimum number of remote units (120) per group if the average number of remote units (120) per group exceeds the maximum number of remote units (120) per group.

Abstract translation: 提供了一种控制远程单元组（120）在多组远程单元（120）中的分配的方法。 每个远程单元（120）具有分别与其相关联的数字标识符。 每组的最大和最小平均远程单位数（120）是固定的。 远程单元（120）根据相应的数字标识符被分配给远程单元组（120）。 然后，确定每组的远程单元（120）的平均数量，作为远程​​单元（120）被分配给它们。 接下来，将每组的远程单元（120）的平均数量与每组的固定最大数量的远程单元（120）进行比较。 重复上述步骤，而每组的远程单元（120）的平均数量小于或等于每组的固定最大数量的远程单元（120）。 组的数量被改变，使得如果每组的平均远程单元数（120）超过最大值，则每组的远程单元（120）的平均数量在每个组的固定的最大和最小数量的远程单元之间（120） 每组的远程单元数（120）。

公开(公告)号：WO1991015062A1

公开(公告)日：1991-10-03

申请号：PCT/US1991001833

申请日：1991-03-20

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  McMULLAN, Jay, Cauthern, Jr. ,  HODER, Douglas, John ,  HUNTLEY, Donald, Randolph

IPC: H04B01/06

CPC classification number: H04N21/44222 ,  H04L5/06 ,  H04L27/2035 ,  H04L27/2276 ,  H04N7/10 ,  H04N7/17309 ,  H04N21/25891

Abstract: A cable television radio frequency data processor (322) for receiving and processing data transmitted from a cable television terminal (315) to the headend (312) of a cable television system comprises a plurality of data receivers (810-813) for receiving the returned data, detectors associated with each receiver for providing an indication of received signal strength and a data processor (840). The data processor (840) responsive to the data receivers (810-813) eliminates redundant data and collects statistics on data throughput and, responsive to the detectors, collects statistics on received signal strength. The data processor (840) then may initiate recalibration of transmit signal levels or an appropriate selection of data transmit channels as required.

公开(公告)号：WO1991008651A1

公开(公告)日：1991-06-13

申请号：PCT/US1990007185

申请日：1990-12-06

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WEST, Lamar, E., Jr. ,  BLUSIEWICZ, Philip, A. ,  FARMER, James, O.

IPC: H04N07/167

CPC classification number: H04K3/825 ,  H04K3/41 ,  H04K3/42 ,  H04K3/43 ,  H04K2203/14 ,  H04N7/166 ,  H04N7/167

Abstract: Off-premises cable television interdiction apparatus comprises a microprocessor actuation and control means (300) for actuating and controlling one or more frequency agile voltage controlled oscillators (341-344). The voltage controlled oscillators (341-344) selectively jam only unauthorized premium programming transmitted in the clear from a headend to a particular subscriber. Each voltage controlled oscillator (341-344) is allocated a continuous band of frequencies consistent with the elimination of jamming signal frequency harmonics which may disturb authorized programming at a higher channel frequency. The microprocessor actuation and control means (300) provides a calibration mode and a normal mode of operation. The method of interdiction comprises the steps of generating and storing voltage control words for operating the oscillators consistent with a headend selected jamming factor for a particular channel to be jammed and addressably transmitting and storing premium programming authorization data. An optimum frequency amplitude window for the jamming signal is disclosed.

Abstract translation: 室外有线电视遮断装置包括用于致动和控制一个或多个频率敏捷压控振荡器（341-344）的微处理器致动和控制装置（300）。 电压控制振荡器（341-344）选择性地仅阻止以从前端到特定用户的清晰度发送的未经授权的高级编程。 每个压控振荡器（341-344）被分配有与消除干扰信号频率谐波一致的频率的连续频带，这可能在更高的信道频率下干扰授权的编程。 微处理器致动和控制装置（300）提供校准模式和正常操作模式。 截断方法包括以下步骤：产生和存储用于操作振荡器的电压控制字，以与要阻塞的特定信道的头端选择的干扰因子一致，并且可寻址地发送和存储优质节目授权数据。 公开了用于干扰信号的最佳频率幅度窗口。

公开(公告)号：WO1991008649A1

公开(公告)日：1991-06-13

申请号：PCT/US1990007117

申请日：1990-12-05

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  West, Lamar, E., Jr. ,  FARMER, James, O.

IPC: H04N07/167

CPC classification number: H04N7/166 ,  H04K3/825 ,  H04K2203/14 ,  H04N7/17309 ,  H04N7/17354

Abstract: A cable television reverse manifold system is coupled between first and second diplexers of off-premises subscriber service providing equipment. The diplexers separate the transmission path (115) between a headend (100) and a subscriber (181) into downstream or forward and upstream or reverse transmission paths (115). In one embodiment, the reverse manifold apparatus combines signals from at least one subscriber (181) for transmission to the headend (100). In another embodiment including a data receiver and a controller, the off premises service providing equipment may be controlled by the subscriber. In yet a third embodiment, a radio frequency transmitter is coupled between the controller and the upstream diplexer which may actuate a plurality of simultaneous data transmissions over separate data channels in the notoriously noisy subsplit 5-30 megahertz transmission spectrum.

Abstract translation: 有线电视反向歧管系统耦合在室外用户服务提供设备的第一和第二双工器之间。 双工器将前端（100）和用户（181）之间的传输路径（115）分离成下行或前向以及上行或反向传输路径（115）。 在一个实施例中，反向歧管装置将来自至少一个用户（181）的信号组合以用于传输到头端（100）。 在包括数据接收器和控制器的另一个实施例中，外部场所服务提供设备可以由用户控制。 在第三个实施例中，射频发射机耦合在控制器和上行双工器之间，该双工器可以在臭名昭着的噪声分段5-30兆赫兹传输频谱中的单独的数据信道上致动多个同时的数据传输。

公开(公告)号：WO1991008498A1

公开(公告)日：1991-06-13

申请号：PCT/US1990006685

申请日：1990-11-15

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  HODGE, Ronald, L.

IPC: G02B06/26

CPC classification number: G02B6/4277 ,  G02B6/3887 ,  G02B6/3897 ,  G02B6/4248 ,  G02B6/4292 ,  G02B6/4439 ,  G02B6/4471

Abstract: The present invention relates to a novel fiber optic conduit-connector assembly (10) for passing optical fibers (1) between optoelectronic component housings. In one preferred embodiment, the conduit comprises a flexible, crush resistant and fluid resistant inner tube (16) adapted for enclosing at least one optical fiber, a layer of electromagnetic shielding (14) surrounding the inner tube, and an outer pressure tight layer (12) surrounding the shielding layer. A connector (20) adapted to allow at least one optical fiber (1) to pass therethrough is fixedly attached to at least one end of the conduit (16) by first stripping away the end portion of the outer layer of the conduit, inserting the inner tube of the conduit into one end of the connector (20) and wrapping the shielding layer (12) around the outer surface of the connector end. A thermofit ring (30) is placed over the steel braiding (14) and secures the braiding to the connector upon application of heat to the thermofit ring. A layer of heat shrink tubing (32) is then placed over the thermofit ring (30) and exposed inner layers of the conduit to provide a protective pressure proof layer. The other end of the connector (24) is threaded to engage a standard coaxial cable entry port on an optoelectronic component casing.

公开(公告)号：WO1990009078A1

公开(公告)日：1990-08-09

申请号：PCT/US1990000468

申请日：1990-02-01

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  BACON, Kinney, C.

IPC: H04N07/10

CPC classification number: H04N7/102

Abstract: Volume control for use in a cable television set top converter or the like is calibrated for optimum television stereo channel separation. The volume control controls the volume to predetermined levels. One of the predetermined levels is a particular level calibrated for optimum stereo separation. An indicator on the converter indicates the optimum stereo separation volume level. When an internal VCR timer turns on the set top converter, the set top converter is forced to the optimum stereo separation volume level. The calibration is performed during manufacture and ensures that the indicated volume level for optimum stereo separation is indeed the optimum volume level.

公开(公告)号：WO1990007847A1

公开(公告)日：1990-07-12

申请号：PCT/US1989005657

申请日：1989-12-22

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  JOHNSON, Lee, R. ,  SMITH, Elizabeth, A. ,  MYERS, Howard, L.

IPC: H04N07/173

CPC classification number: H04N7/1675 ,  H04N5/44543 ,  H04N7/0888 ,  H04N7/165 ,  H04N7/173 ,  H04N7/17318 ,  H04N21/2143 ,  H04N21/42204 ,  H04N21/42228 ,  H04N21/478 ,  H04N21/4854 ,  H04N21/6402

Abstract: A two-ray interactive addressable entertainment terminal comprises a processor, a keyboard, a character generator responsive to the processor and memory for storage of an algorithm related to the installation of the terminal and to providing a verification indication at the terminal of acknowledged entry of the terminal into an entertainment system. The character generator, responsive to the passage of a predetermined period of time since the application of power to the terminal, causes a number of screens to be displayed on an associated television receiver. The display screens reinforce the algorithm and provide indications of programmed key functions despite labels of keys on the keyboard. Consequently, a user or installer is capable of installing a terminal according to the present invention without any communication with personnel at the location of a system manager. By requiring the practically simultaneous occurence of two events the application of power and the actuation of a predetermined key, inadvertent entry into either an installation mode or a maintenance mode of terminal operation is prevented.

Abstract translation: 双射交互式可寻址娱乐终端包括处理器，键盘，响应于处理器的字符发生器和用于存储与终端的安装相关的算法的存储器，并且在终端确认输入的终端提供验证指示 终端进入娱乐系统。 字符发生器响应于从向终端施加电力而经过预定时间段，使得在相关联的电视接收机上显示多个屏幕。 显示屏幕加强了算法，并提供了编程键功能的指示，尽管键盘上的键标签。 因此，用户或安装者能够根据本发明安装终端，而无需与系统管理员位置的人员通信。 通过要求实际上同时发生两个事件，防止了电力的施加和预定键的致动，无意中进入终端操作的安装模式或维护模式。

公开(公告)号：WO1989012832A1

公开(公告)日：1989-12-28

申请号：PCT/US1989002354

申请日：1989-06-02

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  DUBOIS, Carl, E.

IPC: G01R23/02

CPC classification number: G01R23/165 ,  G01R23/175

Abstract: A spectrum analyzer for analyzing an input spectrum. The analyzer includes a down converter (55) capable of converting block or portions of the input spectrum to a corresponding predetermined output band of frequencies. A stepping device of local oscillator (75) associated with the down converter (55) sequentially selects portions of the input spectrum for conversion by the down converter (55). An A/D converter (81) converts the output of the block converter (70) into digital signals. A digital filter (50) selects a predetermined frequency band from the predetermined output band of frequencies of the block converter (70). A processing unit (65) effects FFT operation on data contained within the predetermined frequency band. A memory device (68) sequentially stores the output from the processing unit.