Abstract:
A test system with multiple instruments. Some instruments act as controller instruments and others act as controlled instruments. Each instrument includes a clock generator that synthesizes one or more local clocks from a reference clock. The reference clock is a relatively low frequency clock that can be inexpensively but accurately generated and distributed to all of the instruments. A communication link between instruments is provided. Timing circuits within instruments that are to exchange time information are synchronized to establish a common time reference. Thereafter, instruments communicate time dependent commands or status messages asynchronously over the communication link by appending to each message a time stamp reflecting a time expressed relative to the common time reference. The test system includes digital instruments that contain pattern generators that send command messages to analog instruments, which need not include pattern generators. The architecture simplifies design of analog instruments and avoids redesign of analog instrument as pattern rates of digital instruments change.
Abstract:
A test system with multiple instruments. Some instruments act as controller instruments and others act as controlled instruments. Each instrument includes a clock generator that synthesizes one or more local clocks from a reference clock. The reference clock is a relatively low frequency clock that can be inexpensively but accurately generated and distributed to all of the instruments. A communication link between instruments is provided. Timing circuits within instruments that are to exchange time information are synchronized to establish a common time reference. Thereafter, instruments communicate time dependent commands or status messages asynchronously over the communication link by appending to each message a time stamp reflecting a time expressed relative to the common time reference. The test system includes digital instruments that contain pattern generators that send command messages to analog instruments, which need not include pattern generators. The architecture simplifies design of analog instruments and avoids redesign of analog instrument as pattern rates of digital instruments change.
Abstract:
A holder for a loudspeaker box onto which the loudspeaker box can be slipped. The holder includes a control handle and a clamping device actuatable without tools via the control handle.
Abstract:
A test system with multiple instruments. Some instruments act as controller instruments and others act as controlled instruments. Each instrument includes a clock generator that synthesizes one or more local clocks from a reference clock. The reference clock is a relatively low frequency clock that can be inexpensively but accurately generated and distributed to all of the instruments. A communication link between instruments is provided. Timing circuits within instruments that are to exchange time information are synchronized to establish a common time reference. Thereafter, instruments communicate time dependent commands or status messages asynchronously over the communication link by appending to each message a time stamp reflecting a time expressed relative to the common time reference. The test system includes digital instruments that contain pattern generators that send command messages to analog instruments, which need not include pattern generators. The architecture simplifies design of analog instruments and avoids redesign of analog instrument as pattern rates of digital instruments change.
Abstract:
A clock system is disclosed for distributing and generating a digital clock signal for a plurality of electronic assemblies. The clock system includes a remote fixed-frequency clock for generating a first clock signal of a first frequency and a plurality of local clock modules. The local clock modules are respectively disposed on the plurality of electronic assemblies and each include synthesizer circuitry for creating a variable clock signal of a different frequency than the first frequency. Fanout circuitry is coupled between the remote fixed frequency clock and the plurality of local clock modules to distribute the first clock signal.
Abstract:
A numeric counter oscillator is disclosed comprising a quotient accumulator and a remainder accumulator. The quotient accumulator has a programmable input for receiving a QUOTIENT value, a reference clock input and a multi-bit output. The output is adapted for transmitting an output value OUT representing an accumulated quotient sum. The multi-bit output increments by a predetermined amount in response to each reference clock period. The remainder accumulator comprises programmable inputs for receiving respective REMAINDER and DIVISOR values, a a reference clock input and a multi-bit output representing an accumulated digital remainder sum less than a predefined digital integer. The remainder accumulator further comprises a comparator having a first input for receiving a programmed divisor value, and a second input for receiving the remainder accumulator multi-bit output. The comparator is operative to generate an increment carry signal for application to the quotient accumulator when the remainder multi-bit output reaches the predefined integer value.
Abstract:
A timing system is disclosed that responds to pattern generation circuitry for producing test patterns for application to a device-under-test. The timing system includes a timing memory circuit that stores programmed edge timings for the patterns and couples to timing logic including a master oscillator and a plurality of fixed edge generators. The fixed edge generators are responsive to the programmed edge timings to produce the event timing signals.
Abstract:
The present invention relates to reactive polyurethane compositions having only small amounts of free, low molecular weight diisocyanates before and after crosslinking, and to the production thereof and the use thereof in reactive one- and two-component adhesives/sealants, bonding foams, encapsulating compounds and in flexible, rigid and integral foams.
Abstract:
Holding device and method for holding an instrument. The holding device includes a housing, at least one holding arm having a mounting section coupled to a holding section through at least one offset lever section, and a resetting device structured and arranged to act eccentrically on the mounting section. The at least one holding arm is rotatable about a longitudinal axis of the mounting section.