Ground Station Digital Interface.
Abstract
Digital computer interface equipment has been developed to enable the recovery of digital data encoded in special format and recorded, both in flight and in laboratory experiments, using an analogue magnetic tape transport. The recorded data are first reproduced, in a continuous manner, at the ground station processing centre, using an analogue magnetic tape reproducing machine and are then taken to the input of the interface equipment. Serial to parallel conversion of the data into 16-bit words suitable for direct entry into a computer, under interrupt control, is performed by the interface equipment. Time-of-day information which is normally multiplexed with other digital data and recorded on the magnetic tape, effectively constitutes an identifier which may be used for specifying the location of any areas of interest on the tape. To enable the analogue reproducing machine to be stopped at any predetermined location, a preset stop signal generator has been incorporated in the interface equipment. Complete details, together with a functional description, of each circuit within the digital interface equipment are included. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA110055
Entities
People
- K. F. Fraser
- U. R. Krieser