Pulse or digital communications – Repeaters – Testing
Patent
1979-08-17
1982-02-02
Yusko, Donald J.
Pulse or digital communications
Repeaters
Testing
455 38, 34082544, 34082565, H04B 116, H04L 2700, H04Q 912
Patent
active
043143717
ABSTRACT:
A digital data radio transmission system, such as may be used in communicating point-to-point by radio, in which a keyboard is used to insert a multi-decimal-digit number representing the called station. This is fed to a decimal-to-binary converter, forming a train of binary bits which are then coded in a selected manner so as to be substantially noise immune. The output of the coder then goes to the radio transmitter. At the receiving end, a similar means is provided for obtaining and storing in a 24-bit register the selected number of the called station. The output of the radio detector is then decoded to obtain the 24-bit word representing the called station, which is stored in a second register. A comparator compares the numbers stored in the two registers. When they compare positively, an alarm signal is enabled, or the receiver squelch is broken.
REFERENCES:
patent: 2941161 (1960-06-01), Scantlin
patent: 3510777 (1970-05-01), Gordon
patent: 3551815 (1970-12-01), Berman
patent: 3906348 (1975-09-01), Willmott
patent: 4019142 (1977-04-01), Wycoff
patent: 4037201 (1977-07-01), Willmott
patent: 4075564 (1978-02-01), Masur et al.
patent: 4121198 (1978-10-01), Tsuboi et al.
Covington Edward L.
Self Herman D.
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