Abstract: A system, method, and computer readable medium for burst mode optical receiver that enables an optical receiver to receive signals from a plurality of optical network units at different optical power levels comprising, collecting Received Signal Strength Indication information from a previous data stream of an optical network unit, and adjusting an optical receiver to optimize reception of subsequent incoming data streams of the optical network unit based upon Received Signal Strength Indication information received from the previous data stream.

Abstract: In an optical data network, such as a passive optical network (PON), an optical line terminator (OLT) measures the strengths of one or more signals received from the optical network units (ONUs) and generates a message containing an indication responsive to the measured signal strength. The OLT transmits the message to the ONUs. The ONUs generate packets having preambles of a length responsive to the indication contained in the message.

Abstract: In a passive optical network (PON), a burst-mode receiver of an optical line terminator (OLT) is initialized during an initialization phase, such as ranging, by asserting one or more reset signals in response to detecting the presence of a packet signal. For example, after the OLT transmits an initialization message, such as a ranging grant, to an optical network unit (ONU), it asserts one or more reset signals when it detects the presence of a packet signal received from the ONU in response.

Abstract: An optical line termination comprises a DC current load, power measurement circuitry, upstream data path circuitry and current mirror circuitry. The current mirror circuitry is connected between the DC current load, the power measurement circuitry and the upstream data path circuitry. The DC current load is connected in parallel with a photodiode of the upstream data path circuitry. The DC current load exhibits a substantially fixed load. The current mirror provides a copy of an aggregate current to the power measurement circuitry. The aggregate current is a summation of a current draw by the DC current load and a current draw by the photodiode. The power measurement circuitry is configured for outputting a power level dependent upon the aggregate current. Accordingly, the optical line termination provides for a non-intrusive solution for measuring optical input power and, thereby, enables the measured optical power to be monitored.

Abstract: An ECL to CMOS signal converter circuit including built-in toggle-fault detection circuitry and method of conversion are provided in which an RF transformer is used to translate ECL level digital signals to CMOS level signals. A diode biasing circuit shifts the average DC level of the CMOS level signals in a positive direction to avoid signal undershoot. An AC peak detection circuit is connected to the inactive leg of the RF transformer to monitor toggling of the ECL level input signal lines. A DC comparator circuit compares the detected peak voltage with a predetermined threshold voltage, and generates an alarm signal representing a toggle-fault whenever the detected peak voltage is lower than the predetermined threshold.

Abstract: A power transistor, solid state device, or electronic component is mounted on a chassis or heat sink with a thin sheet of insulating material between the transistor and chassis. Machine screws hold the transistor and sheet of insulating material on the chassis, and are insulated by an O ring positioned around each screw and in suitable openings in the chassis. The machine screws press the sheet of insulating material between the transistor and heat sink for good heat transfer, and press each O ring into its respective opening to eliminate air space and improve the voltage breakdown characteristics.

Abstract: In previous power line carrier systems, the gain of a broadband frequency amplifier was controlled by a feedback loop that utilized the magnitude of a pilot frequency signal. When the amplifier was turned on or when the gain control loop was switched into the circuit, large magnitude signals in the broadband of frequencies tended to overdrive the amplifier. This condition caused the pilot frequency signal to be suppressed so that the gain of the amplifier was kept too high. As a result, the broadband signals were limited and distorted. The pilot frequency signal stayed suppressed so that the carrier system caused faulty operation. The invention provides an added feedback loop that controls the gain of the broadband frequency amplifier as a function of the broadband of frequency signals until the pilot frequency signal can control the gain. After the pilot frequency signal begins to control, the broadband frequency loop is rendered inoperative.