TELEPHONE CHANNEL MONITOR SYSTEM MODIFICATION AND EVALUATION.
Final rept. Dec 65-Jan 67,
HONEYWELL INC SEATTLE WA ORDNANCE DIV
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This report discusses the developmental modifications and evaluation of the Telephone Channel Monitor System. The system continuously monitors a communications channel on a noninterfering basis by combining a low-level, spread-spectrum, frequency-division-multiplex probe signal with the transmitted data and deriving channel-distortion characteristics from the received probe signal. Correlation techniques are applied separately to five subcarrier bands to measure relative delay distortion and relative amplitude distortion across the channel bandwidth. The system automatically corrects for frequency translation within specified limits, counts noise impulses in the channel, and detects channel discontinuity. Theoretical aspects of the system, the modification program, and system evaluation results are discussed. The developmental modifications were performed primarily to reduce the system acquisition time and to improve the display of the channel parameter information so that the system may be more readily translated to practical Air Force use. Author
- Non-Radio Communications