Nvision, Inc.

Grass Valley Usa, LLC

Thomas B Crabb

Birney D Dayton

Charles S Meyer

Kieran J Lyons

Mark E Nelsen

Gary M Waters

A switching facility has a plurality of input ports for connection to signal sources in multiple categories, each category having multiple members, a plurality of output ports for connection to signal destinations in multiple categories, each category having multiple members, and a switch fabric configurable by a control system to connect any selected input port to any unique group of one or more output ports. A control panel interacts with the control system and has a plurality of actuatable elements and a display area associated with each actuatable element for displaying a legend associated with the actuatable element. The control system is functionally connected to the control panel and is operative to change the legend associated with an actuatable element.

Switching facility having a control panel with relegendable buttons

A circuit for processing an input pulse signal of which the slew rate is dependent on pulse frequency comprises an amplifier (30; 78) for receiving the input pulse signal and generating an output pulse signal having transitions of which the slew rate is dependent on a bias current supplied to the amplifier, and a circuit (38-66; 82-108) for supplying bias current to the amplifier, the bias current being representative at least substantially of the frequency of occurrence of pulses in the input pulse signal.

Providing transitions of slew rate dependent on pulse frequency

A switcher has a plurality of input ports and a plurality of output ports. A plurality of port transceivers each have first and second I/O ports, an input port connected to an output port of the switcher and an output port connected to an input port of the switcher. Each port transceiver provides a first input signal path from the first I/O port to the output port of the transceiver, a second input signal path from the second I/O port to the output port of the transceiver, a first output signal path from the input port of the transceiver to the first I/O port, and a second output signal path from the input port of the transceiver to the second I/O port. Each port transceiver has a first state in which it propagates a signal received at its input port to its second I/O port and a signal received at its first I/O port to its output port and the first output signal path presents a high impedance to the first I/O port, and a second state in which it propagates a signal received at its input port to its first I/O port and a signal received at its second I/O port to its output port and the second output signal path presents a high impedance to the second I/O port.

Port transceiver for providing communication between a signal

Time code signal processing circuit for removing and restoring variation

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Grass Valley, CA, United States of America

Thomas B Crabb