120 Mb/s and 240 Mb/s Bit Synchronizer-Signal Conditioners for NASA High Data Rate Applications

Abstract

Two bit synchronizer-signal conditioners (BSSC) developed for NASA high data rate applications such as earth resources monitoring are described. One BSSC is centered at 120 Mb/s and the other at 240 Mb/s. These subsystems are featured out of the total hardware developed* because the BSSC is such a key subsystem in determining overall system statistical performance. These units represent an evolution of high data rate technology toward the versatile any data rate BSSC's available at low data rates. Numerous inputs/outputs, control functions, indicators, plus the ability to minimize the effects of various signal perturbations are provided. Examples of allowed perturbations are input level variations, bit rate variance static and dynamic, baseline, transition density, bandlimiting, etc., as well as noise. Emphasis in the past has been primarily concerned only with noise.