Test unit for a high-rate multitrack digital recorder
AssigneeThomson-CSF
InventorTristan de Couasnon
Life of this patent
Estimating the term…
Abstract
The unit for testing a plurality of tracks of a high-speed recorder in parallel comprises an emission subassembly for the transmission of data to the recorder to be tested and a test subassembly. The emission subassembly mainly comprises a generator for producing a pseudo-random or ramp-function sequence of binary numbers consisting of a plurality of binary elements in parallel. The test subassembly comprises a data storage device for storing the data reproduced by the tested recorder, a second generator programmed in the same manner as the first, a device for comparing the reproduced sequence with the emitted sequence and an error analysis device which delivers a measurement of the error rate and serves to locate the detected errors.
Claims7
A test unit for a high-rate multitrack digital recorder, said unit having a multiple input and output and comprising:
- a first generator for producing a sequence of binary numbers and connected to said multiple output for transmitting data to the recorder to be tested;
- a data storage means connected to said multiple input of said test unit for storing the data reproduced by the tested recorder;
- a second generator for producing the same sequence of binary numbers;
- means for comparing the reproduced sequence with the emitted sequence, said comparing means being connected to the output of the storage means to the output of the second generator;
- an error analysis means connected to the output of the comparison means for counting the errors introduced by the recorder to be tested and detected by the comparing means;
- and
- said error analysis means including a first counter for counting detected errors and means for locating detected errors, said error locating means including a second counter for counting reproduced binary numbers and delivering at each instant the address of the binary number analyzed in the sequence and a storage memory means connected to said comparing means and to said second counter and having a control input for causing storage of addresses of binary numbers in which errors are detected and the position of the detected errors in each erroneous number.
A test unit for a high-rate multitrack digital recorder, said unit having a multiple input and output and comprising:
- a first generator for producing a sequence of binary numbers and connected to said multiple output for transmitting data to the recorder to be tested;
- a data storage means connected to said multiple input of said test unit for storing the data reproduced by the tested recorder;
- a second generator for producing the same sequence of binary numbers;
- means for comparing the reproduced sequence with the emitted sequence, said comparing means being connected to the output of the storage means and to the output of the second generator;
- and
- an error analysis means connected to the output of the comparing means for counting the errors introduced by the recorder to be tested and detected by the comparing means;
- said storage means comprising a stack of memory registers for storing a plurality of successive binary numbers of the reproduced sequence, and a decoding logic means connected to the outputs of the memory registers, a synchronization signal being delivered by one output of said decoding means to the second generator and the comparing means for a predetermined succession of numbers identified as the beginning of a sequence.
Dependencies are inferred from the claim text.