Tideland Signal Corporation

Elster Solutions, LLC

Mark C Fischer

James E Olivenbaum

Kenneth C Shuey

A frequency input for receiving a frequency signal and digital storing for storing the received frequency signal. A controller has a first and second input and an output. The first input is connected to the digital storage for providing a reference signal and the output provides a frequency control signal. The second input is connected to circuitry for changing the operation mode of the controller to either an amplifier or an integratory. As an amplifier, a digitally set offset and gain is applied to the amplifier for providing an output generating approximately the frequency of a prior signal. A switch connects the frequency output to the second input when operating in the integrating mode to control the output for generating a desired frequency.

Servo control with self calibrating preset

An improved side lobe suppression circuit in a racon for determining frequency band edge. As the temperature varies, a temperature frequency calibration table receives a temperature measurement and determines which frequencies are out of band as the temperature varies. A microprocessor changes the threshold values in a ram in response to temperature changes to suppress out of band frequencies but to allow the transmission of in band frequencies above a predetermined threshold.

Growing community of inventors

Pasadena, TX, United States of America

Mark C Fischer