The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 1986
Filed:
Jun. 25, 1984
Seiichiro Shigaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An apparatus for testing the operation of a digital speech interpolator provided in a transmitting station and a receiving station in a time division multiple access scheme (DSI/TDMA). The apparatus comprises a transmitting unit and a receiving unit. In the transmitting unit at the transmitting station, a pseudo random code for each one of a plurality of channels is generated, a channel identifying signal is generated, a fixed signal having a level lower than a detectable level of a tone detector of the digital speech interpolator (DSI) at the transmitting station is generated, and a pseudo tone burst signal for each channel is generated. The pseudo random code, the channel identifying signal and the fixed signal are used under the control of the pseudo tone burst signal, for generating a time division multiplex signal. The time division multiplex signal is supplied to the DSI at the transmitting station. In the receiving unit at the receiving station, the signal sent from the DSI on the transmitting station is received for detecting the pseudo random code, the channel identifying signal and the fixed signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile