Abstract: A method and structure for compensation techniques in coherent optical receivers. The present invention provides a coherent optical receiver with an improved 8×8 adaptive MIMO (Multiple Input, Multiple Output) equalizer configured within a digital signal processor (DSP) to compensate the effects of transmitter I/Q skew in subcarrier multiplexing (SCM) schemes. The 8×8 MIMO equalizer can be configured such that each of the 8 outputs is electrically coupled to 3 of 8 inputs, wherein each of the input-output couplings is configured as a filter. The method includes compensating for impairments to the digital conversion of an optical input signal via the 8×8 MIMO equalizer following other signal processing steps, such as chromatic dispersion (CD)/polarization-mode dispersion (PMD) compensation, carrier recovery, timing synchronization, and cycle slip correction.

Abstract: A method and structure for compensation techniques in coherent optical receivers. The present invention provides a coherent optical receiver with an improved 8x8 adaptive MIMO (Multiple Input, Multiple Output) equalizer configured within a digital signal processor (DSP) to compensate the effects of transmitter I/Q skew in subcarrier multiplexing (SCM) schemes. The 8×8 MIMO equalizer can be configured such that each of the 8 outputs is electrically coupled to 3 of 8 inputs, wherein each of the input-output couplings is configured as a filter. The method includes compensating for impairments to the digital conversion of an optical input signal via the 8x8 MIMO equalizer following other signal processing steps, such as chromatic dispersion (CD)/polarization-mode dispersion (PMD) compensation, carrier recovery, timing synchronization, and cycle slip correction.

Abstract: A method and structure for compensation techniques in coherent optical receivers. The present invention provides a coherent optical receiver with an improved 8×8 adaptive MIMO (Multiple Input, Multiple Output) equalizer configured within a digital signal processor (DSP) to compensate the effects of transmitter I/Q skew in subcarrier multiplexing (SCM) schemes. The 8×8 MIMO equalizer can be configured such that each of the 8 outputs is electrically coupled to 3 of 8 inputs, wherein each of the input-output couplings is configured as a filter. The method includes compensating for impairments to the digital conversion of an optical input signal via the 8×8 MIMO equalizer following other signal processing steps, such as chromatic dispersion (CD)/polarization-mode dispersion (PMD) compensation, carrier recovery, timing synchronization, and cycle slip correction.

Abstract: A support assembly for a boat cover includes a first support member having a first end disposed adjacent to the boat cover and a second end having an opening, a second support member having a first end telescopically received within the opening, and a biasing element disposed between the first end of the second support member and the first end of the first support member. The biasing element biases the first support member away from the second support member and into engagement with the boat cover.

Abstract: A compression and vacuum-producing machine includes a housing, at least one rotating disk having a plurality of blades rotationally supported within the housing, and at least one stationary disk having a plurality of blades fixedly attached to the housing. A drive shaft includes a generally tapered surface and rotatably drives the rotating disks to increase the energy of a fluid stream disposed within the housing. The compression machine includes a transmission in mechanical communication with the drive shaft to convert a rotational input to a desired rotational speed and drive the shaft at the desired speed.

Abstract: A support assembly for a boat cover includes a first support member having a first end disposed adjacent to the boat cover and a second end having an opening, a second support member having a first end telescopically received within the opening, and a biasing element disposed between the first end of the second support member and the first end of the first support member. The biasing element biases the first support member away from the second support member and into engagement with the boat cover.

Abstract: A system for absorbing shock including a resilient member positioned between a portion of the head and a portion of the shaft of the tool. The resilient member dampens and absorbs vibration travelling from the head to the shaft and reverberations travelling through the tool. The system also includes a shock-absorbing member having an internal portion positioned within a cavity in the head of the tool and an external portion positioned on an upper surface of the head that dampens and absorbs vibration travelling within the head and reverberations travelling through the tool. The system further includes a bonding material filling spaces with the cavity and a channel within the head that further dampens and absorbs vibration travelling from the head to the shaft and reverberations travelling through the tool. The system includes a handle portion that has a soft elastomeric outer coating that provides a comfortable grip to the user and hinders vibration from travelling from the shaft to the hand of the user.

Abstract: A system for absorbing shock including a resilient member positioned between a portion of the head and a portion of the shaft of the tool. The resilient member dampens and absorbs vibration travelling from the head to the shaft and reverberations travelling through the tool. The system also includes a shock-absorbing member having an internal portion positioned within a cavity in the head of the tool and an external portion positioned on an upper surface of the head that dampens and absorbs vibration travelling within the head and reverberations travelling through the tool. The system further includes a bonding material filling spaces with the cavity and a channel within the head that further dampens and absorbs vibration travelling from the head to the shaft and reverberations travelling through the tool. The system includes a handle portion that has a soft elastomeric outer coating that provides a comfortable grip to the user and hinders vibration from travelling from the shaft to the hand of the user.

Abstract: Apparatus for wet laminating a photopolymerizable film onto circuit board panels or other substrates. The apparatus is easily and quickly convertible from dry laminating to wet laminating with the rollers therefor mounted in bearing blocks which are insertable in slots in brackets at each end and removable therefrom. The lower roller thereof has a gear the teeth of which are meshable with the teeth of an idler gear for transmission of rotation power thereto. Elongate tubes for applying a fluid, which comprises between about 0.1 and about 10 wt. % of a heterocyclic metal-chelating agent, to the wet insertion rollers for application thereof to the panels are contained in a yoke which is adjustable next to wet insertion rollers for wet laminating or away from dry insertion rollers for dry laminating.

Abstract: Apparatus for wet laminating a photopolymerizable film onto circuit board panels or other substrates. The apparatus is easily and quickly convertible from dry laminating to wet laminating with the rollers therefor mounted in bearing blocks which are insertable in slots in brackets at each end and removable therefrom. The lower roller thereof has a gear the teeth of which are meshable with the teeth of an idler gear for transmission of rotation power thereto. Elongate tubes for applying a fluid, which comprises between about 0.1 and about 10 wt. % of a heterocyclic metal-chelating agent, to the wet insertion rollers for application thereof to the panels are contained in a yoke which is adjustable next to wet insertion rollers for wet laminating or away from dry insertion rollers for dry laminating.

Abstract: Apparatus for wet laminating a photopolymerizable film onto circuit board panels or other substrates. The apparatus is easily and quickly convertible from dry laminating to wet laminating with the rollers therefor mounted in bearing blocks which are insertable in slots in brackets at each end and removable therefrom. The lower roller thereof has a gear the teeth of which are meshable with the teeth of an idler gear for transmission of rotation power thereto. Elongate tubes for applying a fluid, which comprises between about 0.1 and about 10 wt. % of a heterocyclic metal-chelating agent, to the wet insertion rollers for application thereof to the panels are contained in a yoke which is adjustable next to wet insertion rollers for wet laminating or away from dry insertion rollers for dry laminating.

Abstract: In the application of dry film solder mask material to a board, a process and applicator for the implementation thereof features automatic feed of the board, initiation of leading and trailing edge tacking, by heated or unheated tacking rolls, of the film to the board by utilization of the board to apply a force tangential to the tacking rolls, and logic circuitry to regulate the leading and trailing edge tacking by closing the tacking rolls to apply roll pressure during each of the leading and trailing edge tacks, and after tacking of the film to the leading edge of the board, opening of the rolls to allow the film to be applied without pressure, with the rolls being closed again to tack the film to the trailing edge of the board.