Abstract: A fault warning system controls light sources and a warning signal to provide an indication of fatal and non-fatal faults in a communication system. The circuitry uses a pull-down circuit in electrical communication with light and signal control circuits. The circuit can be operated to activate a first light emitting diode (LED) if an operational status of a monitored circuit is either fatal or non-fatal fault. The circuit can be operated to deactivate a second LED if an operational status of a monitored circuit is fatal, and the second LED remains active if the operational status of the circuit is a non-fatal fault.

Abstract: A system and process for directly and flexibly switching connections of data packet flows between nodes of a broadband data processing system network. The system acts as a single IP switch.

Abstract: A fan control system uses a closed loop system to adjust the actual operating speed of a fan or fans to a desired operating speed. The desired speed and actual speed are compared in a high gain amplifier to generate a control signal to adjust the actual operating speed of the fan given the feedback.

Abstract: A circuit card that includes a single ground plane connectable to a chassis-ground and a logic device having a ground pin connected to the single ground plane. The connection between the ground pin and the single ground plane provides a direct path between the logic device and the chassis-ground. A power supply is connected to an input pin of the logic device for providing a logic voltage to the logic device. The power supply is connectable to a battery.

Abstract: A method capable of determining whether a target detected by a radar is a stationary on-road object or not is disclosed, wherein a fluctuation in the reception level of a reflected wave from a target is obtained in relation to the distance of the target, a difference in reception level between a maximum point and a minimum point is obtained from the fluctuation of the reception level, and when the obtained difference is larger than a predetermined threshold value, it is determined that the target is a stationary on-road object. Further, slope over the distance between the maximum point and the minimum point is obtained, and when the obtained slope is greater than a predetermined threshold value, it is determined that the target is a stationary on-road object. Further, the distance between maximum points or between minimum points is obtained, and when the obtained distance is smaller than a predetermined threshold value, it is determined that the target is a stationary on-road object.

Abstract: A transmitter that performs stimulated Brillouin scattering suppression is provided. The transmitter includes a non-linear device having an optical input adapted to receive an optical signal, an amplitude modulation input adapted to receive an amplitude modulation signal, a phase modulation input and an output. The transmitter also includes a stimulated Brillouin scattering (SBS) oscillator/driver having first and second oscillators coupled to the phase modulation input of the non-linear device and an amplifier coupled to the output of the non-linear device. The transmitter further includes a laser coupled to the optical input of the non-linear device.

Abstract: An FM-CW radar system comprises a modulating signal generating means for changing a modulating signal to be applied to a FM-CW wave, a calculating means for calculating a distance or relative velocity with respect to a target object by performing processing for detection by fast-Fourier transforming a beat signal occurring between a transmitted signal and a received signal, and a control means for determining a detection range based on the calculated distance, and for performing control to change the modulating signal, wherein the modulating signal is changed by changing one parameter selected from among a modulation frequency, a triangular wave frequency, and a transmit wave center frequency. The detection range is set to a distance obtained by adding a prescribed distance to the shortest distance detected, or to a distance obtained by subtracting a prescribed distance from the distance of a fixed object.

Abstract: An electronics enclosure is provided. The enclosure includes a modular card cage adapted to receive one or more electronic circuit cards and a heat sink adapted to protrude through an opening of an enclosure and couple to the modular card cage. The modular card cage and the heat sink provide an isolated heat transfer path for heat, produced by each of the one or more electronic circuit cards, to be removed from the enclosure.

Abstract: A mounting apparatus having first and second blocks securable within a housing. The first block has first and second grooves for respectively receiving a first edge of a first circuit board and a first edge of a second circuit board such that the first and second circuit boards are aligned with each other and are spaced apart. The second block has a groove for receiving a second edge of the first circuit board that is perpendicular to the first edge of the first circuit board and a surface to which the second circuit board is attached adjacent a second edge of the second circuit board that is perpendicular to the first edge of the second circuit board.

Abstract: When a new target is detected, if it is determined that the distance difference between the newly detected target and the previously detected target is within a predetermined range, the difference between the relative velocity of the newly detected target and the relative velocity of the previously detected target is obtained to determine whether the difference is greater than a predetermined value &Dgr;Va, and when the difference is greater than the predetermined value, it is determined that the new target is a target obtained as a result of mispairing.

Abstract: The present invention includes a method for clock recovery in a packet network. The method includes a network which receives data packets at a destination node. Then the data packets are stored in a buffer. The data packets are read out of the buffer by using a locally generated clock. The fill level of the buffer is monitored over a first period of time. A relative maximum fill level for the buffer is identified during the first period of time. Further, the relative maximum fill level is used to control the frequency of the locally generated clock so as to control the rate at which data is read out of the buffer.

Abstract: A method and a system for filtering a user light beam using a periodic filter having a frequency response stabilized at an absolutely calibrated value are provided. A primary light beam is generated by a tunable laser source and portions thereof are filtered by an absolute reference filter and the periodic filter. First the frequency of the laser source is automatically locked on the absolute reference filter, and then the frequency response of the periodic filter is locked relative to the frequency of the laser source. The frequency response of the periodic filter is therefore continuously maintained at the proper calibration. User input and output are provided to pass the user light beam through the stabilized periodic filter independently of the filter stabilization process. A broadband absolutely calibrated optical source and a method for absolutely calibrating an optical spectrum analysis device are also provided.

Abstract: A reduced bandwidth 8VSB, ATSC transmitter transmits to conventional DTV receivers having bandpass filters with root raised cosine (RRC) band edge responses. The transmitter includes a vestigial sideband modulator for transferring energy in a portion of a spectrum on a first side of a predetermined frequency to a second side of the predetermined frequency. At the low band edge of the spectrum, the predetermined frequency is the pilot carrier frequency. At the high end of the spectrum, the predetermined frequency is the Nyquist sampling frequency. The energy transfer is such that no energy is transmitted between at least one band edge of the spectrum and an intermediate frequency between the band edge and the predetermined frequency. The energy is transferred on a frequency to frequency basis as a function of the energy in the RRC transition and the amplitude of a weighting function extending between the intermediate frequency and the predetermined frequency.

Abstract: An electronic system is provided. The electronic system includes a logic device and at least one input/output interface coupled to the logic device. The electronic system further includes an input/output (I/O) device with memory coupled to the at least one input/output interface, wherein the memory of the I/O device is mapped as an address space region that is directly readable and writable by a processor.

Abstract: A digital radio frequency transport system that performs bi-directional simultaneous digital radio frequency distribution is provided. The transport system includes a digital host unit and at least two digital remote units coupled to the digital host unit. The bi-directional simultaneous digital radio frequency distribution is performed between the digital host unit and the at least two digital remote units.

Abstract: A modular fan unit having a frame receivable within a baffle of a chassis for containing electronic components is provided. Each of a pair of brackets is connected to an end of the frame to form a slot for receiving a wall of the baffle. Moreover, each of the pair of brackets is respectively attachable to a pair of walls of a rack containing the chassis. A fan is attached to the frame so as to align with an aperture located between the pair of brackets and passing through the frame. A controller is attached to the frame and is electrically connected to the fan.

Abstract: A scan type radar device capable of detecting a lateral position of a target even if a peak showing the lateral position of the target irregularly fluctuates in the lateral direction as well as reducing the mis-pairing. The former is achievable by changing a reference value of the lateral fluctuation of the target when all the past and present target data fluctuate to an extent exceeding the reference value. The latter is achievable by forecasting a representative peak position at this time in both of up-beat and down-beat from the peak position data at the preceding time and carrying out the past-correspondence grouping of the up-beat and the down-beat at this time in the vicinity of the position of the representative peak forecast this time; the pairing being carried out by using the representative peak calculated by the past-correspondence grouping.

Abstract: A distortion monitor for a non-linear device is provided. The control circuit includes an input coupleable to receive a signal from the non-linear device and a first frequency monitor coupled to the input. The frequency monitor monitors the level of one of even and odd order distortion at a first frequency and creates a first signal indicative of the level of the distortion without the use of a pilot tone.

Abstract: In a target merging process in a radar ranging device, determination of continuity is accurately performed and output processing of newly appearing targets is performed rapidly. The current target position (data prior to merging) is calculated (S1), and a predicted position is calculated (S2). The continuity of targets whose previous position and current position satisfy predetermined conditions (S3 to S5) is determined (S6 to S7). After the data prior to merging is stored in a buffer (S9), the merging process is performed. By storing the data prior to merging in the buffer, continuity is determined for each detected target and, therefore, even if the position of a target changes after merging, subsequent determination of continuity can be performed accurately.

Abstract: An unwanted peak occurring due to an antenna sidelobe and an unwanted peak occurring due to a harmonic are eliminated in a radar apparatus. A peak from a target that can cause an unwanted peak is found based on the intensity of the peak, and a search is made for a peak having a predetermined positional relationship with the thus found peak. If such a peak is located, then it is determined whether the peak is a candidate for an unwanted peak, based on the difference between the intensity of the peak and the intensity of the main peak. If both of the paired peaks are determined as being candidates for unwanted peaks, it is determined that the peaks are unwanted peaks.