Communications: electrical – Digital comparator systems
Patent
1977-02-03
1978-07-11
Atkinson, Charles E.
Communications: electrical
Digital comparator systems
325 41, 3401461AX, G08C 2500
Patent
active
041005317
ABSTRACT:
Bit error rate is measured by sending a pseudo-random noise (PRN) code test signal simulating digital data through digital equipment to be tested. An incoming signal representing the response of the equipment being tested, together with any added noise, is received and tracked by being compared with a locally generated PRN code. Once the locally generated PRN code matches the incoming signal a tracking lock is obtained. The incoming signal is then integrated and compared bit-by-bit against the locally generated PRN code and differences between bits being compared are counted as bit errors.
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Fletcher James C. Administrator of the National Aeronautics and Space
Fowler Joe
Kobayashi Herbert S.
Kurple William
Atkinson Charles E.
Manning John R.
Marnock Marvin J.
Matthews Marvin F.
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