Patent ID: 9112457
Filing Date: 2015-08-18
Classification: G01R,H03F

Abstract:
1. A system for compression compensation in a test and measurement apparatus, comprising: an acquisition element of the test and measurement apparatus for acquiring a waveform having an original sample rate; an optical pre-shaping filter directing a decompression frequency of the acquired waveform to a specific frequency band to generate a shaped signal; an interpolator and a low-pass filter for upsampling the shaped signal to a predefined higher sample rate; a raw decompressor providing a raw decompressor output of the upsampled shaped signal, the raw decompressor performing the steps of: a down sampler for down sampling the raw decompressed output back to the original sample rate; a linear raw decompressor compensator for compensating for the effect of the raw decompressor in a linear limit of small signals by applying an infinite response filter; and a post shaping filter for performing an inverse filtering of the optical pre-shaping filter.