全文阅读 全文下载 章节阅读

基本信息

【范围】

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. 1.1 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. 1.2 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. {fb712b38ef709fa0ecf45f95cb721bf0.jpg} {f9d89aa89cb85dcd472b57d10f49988a.jpg} 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-1ife 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.

【与前一版的变化】

包含缩略语

BERr：	FORX Bit Error Rate
BLT：	Beacon Loop Timer
BRs：	Signaling Baud Rate for continuous transmission on the medium
BTs：	Nominal signaling Baud width
dV：	Voltage tolerance
Dt：	Distortion
Dt+tJ：	Total Distortion and Jitter
FL：	Fiber Length
FORX：	Fiber Optic Receiver
FOTX：	Fiber Optic Transmitter
FWHM：	Full Width at Half Maximum
HSRB：	High Speed Ring Bus
ISI：	Inter-Symbol Interference
Jt：	Jitter
LTC：	Loop Timer Counter
NRZI：	Nonreturn to Zero Invert
OS：	Optical Signal Overshoot
OSR：	FORX Optical Signal Range
Prx：	Receiver input Port
Ptx：	Transmitter output Port
PW：	Pulse Width
RPIabmx：	FORX absolute maximum Radiant Power Input
RPIma x：	FORX maximum Radiant Power Input
RPImi n：	FORX minimum Radiant Power Input
RPOon：	FOTX Radiant Power Output on
RPOoff：	FOTX Radiant Power Output (off/steady state low)
Rse：	FOTX static extinction Ratio
SBW：	Spectral Bandwidth
Tacq：	FORX acquisition time
Tmin：	Minimum Temperature
Tmax：	Maximum Temperature
Tof：	Optical falltime
Tor：	Optical risetime
US：	Optical Signal Undershoot
WCP：	Worst-Case test Pattern
WO：	Wavelength of peak radiance

被引文件

AS4075

HIGH SPEED RING BUS (HSRB) STANDARD

AS4075

HIGH SPEED RING BUS (HSRB) STANDARD

包含图表

TABLE 1 - Summary of	TABLE 2 - Slash Shee	FIGURE 1-Media Path
FIGURE 2A-O utput Wi	FIGURE 2B-Output Wit	FORMULA 1
FORMULA 2	FORMULA 3	FIGURE 3 - Example o
FIGURE 4 - Receiver