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Time Domain Reflectometry Microcomputer.

Authors
Dworak-RA; Jordan-AG; Thorne-JS
Source
NTIS: PB/267-785 Available for Reference At Bureau Libraries :113 pages
Link
NIOSHTIC No.
10001172
Abstract
This report describes the work done on the development of the time domain reflectometry microcomputer (TDRM). Modifications to the FMC- Model 302a Cable Fault Locator is described in Appendix D. The TDRM unit uses an 8080 microcomputer to accurately locate major faults in low capacitance cables to within +- 1 foot when properly calibrated. Major faults in high capacitance cables are usually located within +- 5 feet. The upper limits of fault detection are <1 kilohm shunt fault and >7 ohm series fault. In practice, fault detection limits are reduced to <300 ohms shunt fault and >30 ohms series fault because of discontinuities caused by cable repair.
Publication Date
19770101
Document Type
CP; Final Contract Report;
Fiscal Year
1977
NTIS Accession No.
PB-267785
NTIS Price
A07
Identifying No.
OFR 106-77
NIOSH Division
PRC;
Source Name
NTIS: PB/267-785 Available for Reference At Bureau Libraries
Performing Organization
Carnegie-mellon University
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