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SAE AS4075/1 Revision A, May 1, 2012
Optical Implementation Relating to the High Speed Ring Bus (HSRB) Standard
Description / Abstract:
This SAE Aerospace Standard (AS) has been prepared by the Ring
Implementation Task Group of the SAE AS-2 Committee. It is intended
as a companion document to the SAE AS4075 High Speed Ring Bus
Standard. While the Standard is intended to provide as complete a
description as possible of an HSRB implementation, certain
parameters are system-dependent and evolutionary. This document
contains those parameters. The text through Table 1 is intended to
provide definitions and descriptions applicable to all
applications. Table 2 contains specific parameter values for one or
more implementations. This table will change as new systems are
implemented or new HSRB speed options are defined.
System Characteristics:
The fiber optics characteristics germane to HSRB implementation are specified in five groups as follows:
a. Common system characteristics
b. Media characteristics
c. Bypass switch characteristics
d. Transmitter characteristics
e. Receiver characteristics
This slash sheet covers (a), (d), and (e); (b) and (c) are contained in the Handbook for the SAE AS4075 High Speed Ring Bus AIR4289.
Definitions and Requirements:
Detailed procurement-oriented parameter definitions and requirements for optical transmitters and receivers are contained in the following paragraphs of this document. Table 1 provides a summary of the parameter abbreviations, brief descriptions, and units of measurement for component characteristics. Specific numerical values for the parameters for specific implementations of the HSRB are given in Table 2.
The definitions provided herein are generally accepted by vendors of fiber optic components, as are the measurement techniques specified. The definitions are consistent with National Bureau of Standards Handbook 140 as the authority on usage.
The specific numerical values noted in Table 2 represent beginning-of-life values for the worst-case operating temperature range and power supply allowance noted. It is incumbent on the system design activity to account for excess loss due to other environmental factors and aging.
System Characteristics:
The fiber optics characteristics germane to HSRB implementation are specified in five groups as follows:
a. Common system characteristics
b. Media characteristics
c. Bypass switch characteristics
d. Transmitter characteristics
e. Receiver characteristics
This slash sheet covers (a), (d), and (e); (b) and (c) are contained in the Handbook for the SAE AS4075 High Speed Ring Bus AIR4289.
Definitions and Requirements:
Detailed procurement-oriented parameter definitions and requirements for optical transmitters and receivers are contained in the following paragraphs of this document. Table 1 provides a summary of the parameter abbreviations, brief descriptions, and units of measurement for component characteristics. Specific numerical values for the parameters for specific implementations of the HSRB are given in Table 2.
The definitions provided herein are generally accepted by vendors of fiber optic components, as are the measurement techniques specified. The definitions are consistent with National Bureau of Standards Handbook 140 as the authority on usage.
The specific numerical values noted in Table 2 represent beginning-of-life values for the worst-case operating temperature range and power supply allowance noted. It is incumbent on the system design activity to account for excess loss due to other environmental factors and aging.
SAE AS4075/1 Revision A, May 1, 2012
Optical Implementation Relating to the High Speed Ring Bus (HSRB) Standard