Communication Mediums for Signal, ITS, and Freeway Surveillance Systems Final Report (1996) / Chapter Skim
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A.4.5 Test, Measurement, and Diagnostic Equipment
A.4.5 Test, Measurement, and Diagnostic Equipment
Pages 462-471
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From page 462... ...
Modern communications equipment design typically provides front panel indicators in addition to the network management reporting to facilitate Mean-Time-to-Repa~r ~) , and vendor equipment service agreements provide replacement and depot-level repair of failed units, Printed Circuit Boards (PCBs)
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From page 463... ...
, Local area networks, · Microwave communications, Direct sequence, digital spread spectrum radio, Synchronous optical network (SONNET, American digital hierarchy (ADH) , and Video communications.
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From page 464... ...
Some key elements for emergency restoration are a restoration lcit, test equipment, mechanical splices, as-built system documents, and access to expert consultation via phone. Commercially available kits include spare cable, two splice closures, two tool kits, and aR items required for bypassing a damaged section.
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From page 465... ...
Private Modem and [eased Line Service Over Twisted Wire Pairs (TWP) Opera fing al Subrafe Communications Levels Copper u ire communications, provided by Public Switched Telephone Networks (PSTNs)
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From page 466... ...
The experienced field technician should be able to accurately monitor and diagnose warplane communications failures with a minimum complement of TMDE. Applicable test equipment includes: · Built-in test for Channel Service UnitsIData Service Units (CSU/DSU)
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From page 467... ...
Specifications pertaining to the maximum operating distances and number of terminals need to be observed to maintain proper operational performance of the LAN. LANs currently offer network management software which provide, but are not limited to, the following diagnostic capabilities: Monitonng of network traffic for individual network elements, or composite network analysis, , Setting of network alarms - typically implies that some action is performed upon alarm activation such as providing a log of conditions which precipitated He alarm, i.e., network saturation; Setting of workstation options; Enabling/Disabling of logging of maintained information; Generation of reports; and Compilation of run-time statistics such as frame counts, frame size distribution, network utilization, bytes per second, and frames per second.
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From page 468... ...
Analog and Digifal Microwave Communications Microwave communications links typically have very exact testing requirements to provide compliance win Federal Communications Commission (FCC) certification regulations.
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From page 469... ...
Direef Sequence Digifa/ Spread Speefrum Radio Communications Direct sequence spread spectrum radios providing digital packet network communications have been recently introduced to the Intelligent Transportation System ~S) marketplace.
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From page 470... ...
Network management allows local and remote fault isolation doom to He module level to provide maintenance personnel web advance ~ndicabon of He spare modules required to perform repairs. The following TMDE is required: Digital multimeter; Optical power meter; Fiber optic test set; Fiber optic attenuator; and Transmission analyzer.
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From page 471... ...
E/A 770A Video Communications Testing Video communications networks deployed In modem systems typically can consist of bow analog and digit distribution systems. End-to~nd video communications quality is required to conform with Electronics Industries Association (ELA)
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