METHOD FOR TESTING ANALOG/DIGITAL CONVERTERS AND/OR DIGITAL/ANALOG CONVERTERS OR SECTIONS OF INFORMATION TRANSMISSION CIRCUITS, COMPRISING SUCH CONVERTERS OR CONNECTED IN SERIES THEREWITH, FOR COMMUNICATION APPARATUS, PARTICULARLY FOR TESTING CODERS-DECODERS FOR PCM APPARATUS, AS WELL AS DEVICE FOR IMPLEMETING SUCH METHOD

摘要

PCT No. PCT/DE82/00143 Sec. 371 Date Feb. 16, 1983 Sec. 102(e) Date Feb. 16, 1983 PCT Filed Jul. 8, 1982 PCT Pub. No. WO83/00231 PCT Pub. Date Jan. 20, 1983.The test specimen is charged with an analog, preferably sinusoidal periodic test signal or, respectively, with the digital samples of such a test signal, whereby a numerical relationship exists between the period of the test signal and the system-inherent sampling period such that all sampling times lying within a predetermined test time span occupy different relative time slots in the periodicity interval of the test signal. Arising as a result thereof are a plurality of output information of the test specimen which, as a totality, describe the response of the test specimen to the test signal as precisely as desired. Said output information are, if need be after analog-to-digital conversion in a standard coder, deposited in a store and are available for identifying the desired properties of the test specimen, for example, the level-dependent distortions, by means of a computer.