Abstract: A very long linear input array capable of acquiring long series of acquisition data is achieved by breaking the long linear array into a series of sub-arrays, each enabled by a "global" set of enable signals. The individual cells of the local arrays are addressed by local x-y enable signals. This arrangement permits the acquisition of very long record lengths, without sacrificing the quality of other aspects of the acquisition process to excess capacitance.

Abstract: A digital finite impulse response (FIR) filter for compensation of Nyquist slope in a pseudo-synchronous demodulator has a plurality of individual FIR filters coupled in series, having a bandpass filtered intermediate frequency video signal as an input and providing a broadband video signal as an output. The individual FIR filter amplitude responses represent each product term of the following polynomial:A(.omega.)=2(1+x)(1+x.sup.2) . . . (1+x.sup.2 (F-1))where F is the number of individual FIR filters in the series and x=(.omega..sub.m -.omega.)/.omega..sub.t, .omega..sub.m being the modulation frequency and .omega..sub.t being a deviation frequency.

Abstract: A real-time data display in a control window of a measurement instrument receives real-time data corresponding to an application, wherein the real-time data is to be displayed to a user. A control window is also displayed, including one or more user-selectable options within the control window and at least a portion of the real-time data within a portion of the control window. A user selection of an option to alter a display of the real-time data is then received, and the real-time data being displayed is altered within the portion of the control window in accordance with the user-selected option.

Abstract: In a system for measuring the quality of a received video sequence with respect to an original video sequence a low duty-cycle transport of video reference images from the original video sequence is used to transmit full quality images. Such a reference frame from the original video sequence is selected and transmitted as a full quality video image, either separately or as part of the transmission of the original video sequence after processing. The processed original video sequence becomes a received video sequence at a receiver, and the frame corresponding to the reference frame is extracted and compared with the full quality received reference frame to obtain a measure of the quality of the received video sequence.

Abstract: An apparatus and method for deriving a signal from the AC line and conveying it to processing circuitry employs two wires each of which is non-conductively attached and capacitively coupled to a respective one of a two-wire AC power line. Each of the capacitive pick-offs is coupled to a respective input of a differential amplifier for amplification. Advantageously, because the output signal is a replica of the AC power line signal, the detection threshold can be set at or near zero volts. This makes the detection point insensitive to the amplitude variations of the AC power line. In one embodiment, an output signal is developed at a single ended output of the differential amplifier, and applied to a low pass filter to remove undesired higher frequencies. A further amplifier provides greater amplification of the filtered representation of the AC power line signal, and includes an amplitude limiting circuit to accommodate the wide range of AC line voltages which may be applied to the instrument.

Abstract: An adapter suitable for use with a handheld multimeter and a thermocouple probe contains a temperature sensor and input connectors suitable for mating with standard thermocouple probes. Both of these are closely coupled thermally to an isothermal domain. Plugs suitable for mating with the input jacks of a handheld multimeter are disposed within the adapter on the other side of a high thermal resistance zone. Conductors connect these outputs to the input connectors and to the leads of the temperature sensor. A four output version of the adapter is shown for use with a three lead temperature sensor, and a three output version is shown for use with a two lead temperature sensor. The output plugs can paired to be more compact and easier to use through the use of dual-signal single-axis banana plugs.

Abstract: The invention relates to a method for determining the transmission characteristics (H(jf)) of an electric line (2) in an ISDN system, in which a test signal (m(t)) is applied to the line (2) at one end, and at the other end of the line (2) the received signal (g(t)) produced owing to the test signal (m(t)) is evaluated.In order to be able to carry out such a method using a test signal having a crest factor of one with relatively little cost, use is made as test signal of a binary, bipolar random number sequence signal (m(t)) having the crest factor of one, and during a time interval corresponding to the period of the test signal (m(t)) the received signal (g(t)) is scanned and subjected to a Fourier transformation to obtain a spectral signal (G(jf)); the latter is complexly multiplied by a reference spectrum Mi(jf) to obtain an output signal (H(jf) which represents a measure of the transmission characteristics of the line (31).

Abstract: A channel subassembly for a PALC display panel comprises a channel member having spaced, substantially parallel, linear channels in its upper surface and a cover sheet (6) attached to the channel member. Islands of transparent conductive material are disposed in a row on a surface of the cover sheet over each channel. The islands in each row are spaced apart along the channel over which they are disposed and are bounded in directions perpendicular to the length of the channel such that they do not extend laterally substantially beyond the channel.

Abstract: A multi chip module with a substrate having a network of a plurality of electrical interconnects and a number of electronic components mounted to the substrate and connected to the network. A monolithic test chip having a number of identical functional regions is mounted to the substrate and electrically connected to the network. Each functional region on the test chip is independently connected to the substrate and is electrically isolated from the others. The chip may be produced by preparing wafers with a grid of identical functional elements, and cutting up the wafers into chips of different sizes, depending on the application.

Abstract: A method and apparatus for measuring the RMS value of an electrical signal. An electrical signal is converted to a digital signal. The digital signal is squared and low pass filtered to extract the DC component, the DC component being recognized as the mean-square of the signal. In use in a measurement device, the square root of the DC component is taken and displayed as the RMS value of the electrical signal.

Abstract: A monitoring OAM cell assisted method enables continuous intrasystem determination of bit errors which have occurred in ATM useful cells with a useful information field and a cell head on an ATM transmission link. First control bits are generated by evaluating bits of ATM useful cells with selected target addresses in the cell head prior to feeding the ATM useful cells into the transmission link, and the control bits are additionally encoded to generate second control bits. The first and second control bits and OAM cells are then transmitted along with the ATM useful bits. The second control bits of the monitoring OAM cells are received at the far end of the ATM transmission link and examined for errors to determine if the monitoring OAM cells were received without error. The first control bits are used to determine if the useful ATM cells were received error-free.

Abstract: An electronic instrument having a housing containing a circuit assembly with a hole. A first shield in the housing is positioned adjacent the hole on one side of the circuit assembly, and a second shield is positioned on the opposite side of the circuit assembly. A spring has a first portion compressed between the circuit assembly and the first shield, and a second portion extending through the hole and biased against the second shield. The spring may be a coil spring with the first portion having a larger diameter to provide a shoulder to rest against the circuit, and the second portion having a smaller diameter to pass through the hole.

Abstract: A new oscilloscope design improves the processing of acquired voltage-versus-time data through the efficient high speed acquisition and rasterization of such data into a form that includes multiple-bits-per-pixel intensity information. The multi-bit-per-pixel variable intensity rasterizer is optimized for maximum throughput and most efficient use of memory bandwidth. In the presence of faltering trigger rates, rasterization interruption provides a high probability of capturing the data associated with the slow triggers. Circuitry is provided to compensate for acquisition time and amplitude non-linearities. Many-bits-per-pixel intensity information is mapped into a fewer-bits-per-pixel format by a controllable transfer function that provides multiple viewing capabilities for the operator. Another mode of operation emphasizes infrequent events over commonly occurring ones using variations in brightness or color.

Abstract: A solid ink stick feed system for use in a color printer is disclosed that utilizes a plurality of ink stick feed receptacles in an ink stick feed bin of predetermined shapes corresponding to the plurality of shapes of the ink sticks such that an incorrectly matched ink stick shape or incorrectly oriented ink stick is retained in a raised position to indicate to the printer operator that the ink stick should be removed and to facilitate grasping and removing such ink stick.

Abstract: A picture quality monitoring system for a television chain provides incremental metrics for each layer of the chain--video, compression and modulation. The output of each layer is stored as a reference signal for the next or subsequent layers. The output from each layer is compared with the output from a prior layer to determine an incremental degradation metric. All of the incremental degradation metrics may be combined to produce an overall degradation metric for the entire television chain.

Abstract: A card guide allowing or impeding airflow to a circuit card uses overlapping airflow shutters disposed longitudinally along the bottom of the card guide. The shutters are operated in response to the insertion of a card into the card guide by the action of a panel of the circuit card engaging an actuating member on the card guide assembly. When open, the shutters provide an opening which exceeds fifty percent of the airway.

Abstract: A cryogenic optical/electrical interconnect module has optical fibers captivated by an optical fiber fixture. The optical fiber fixture includes a stress support section that captivates the buffers protecting the optical fibers in V-grooves, while the bared optical fibers are laid in V-grooves in a carrier portion that has a slant edge at the end. A photodiode fixture of the same material as the optical fiber fixture has a photodiode array mounted thereon, and the optical fiber fixture is aligned with the photodiode array so that optimal optical energy is coupled from the optical fibers to the photodiodes. The fixtures are mounted in a cavity of a conductive substrate and a circuit board is mounted on the top surface of the substrate surrounding the cavity. The circuit board has microstrip lines, and the photodiodes are electrically coupled to the microstrip lines by flexible microstraps. A thermal transition block may be mounted in the cavity between the substrate and the fixtures.

Abstract: A method for increasing resolution in a image printed by an ink jet printer is provided. The method selectively removes painted pixels from a bit map to ensure that no two adjacent pixels are painted by the same ink jet. The method removes painted pixels in a manner that preserves the edges of characters and other features. The resulting processed bit map ensures that an individual print head jet always addresses at least one non-painted/blank pixel after each painted pixel it fills. This allows the speed of the receiving surface relative to the print head to be increased to thereby allow for greater resolution in the printed image for a given print time.

Abstract: An apparatus for providing a probing interface for a circuit under test exhibits a relatively narrow profile and a vertical orientation so that it does not block access to connectors in adjacent slots. The vertical orientation is made possible by the use of a circuit material comprising alternate sections of flexible material and rigid material. Advantageously, the signal lines between the circuit card under test and its motherboard are direct and relatively short, and the probing connection points are isolated from the direct signal lines by a plurality of isolation resistors.

Abstract: Phase change inks containing at least one colorant that comprises the reaction product of at least one oxy-substituted-9,10-anthraquinone compound with at least one monofunctional amine.