1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2007 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AS5706 AEROSPACE STANDARD Issued 2007-05 Test Plan/Procedure for AS5643/1 S400 Copper Media Interface Characteristics Over Extended Distances RATIONALE The purpose of this document is to establish test plans/procedur
5、es for the SAE AS5643/1 Slash Sheet. TABLE OF CONTENTS 1. SCOPE 3 1.1 Purpose. 3 1.2 Application. 3 1.3 Interpretation. 3 2. REFERENCES 3 2.1 Applicable Documents 3 2.1.1 U.S. Government Publications 3 2.1.2 IEEE Publications 4 2.2 Acronyms and Definitions . 4 3. IEEE-1394B REQUIREMENTS, S400 COPPER
6、 MEDIA. 5 3.1 Cable. 5 3.1.1 Cable Requirements . 5 3.1.2 Cable Termination. 10 3.1.3 Cable Interconnects 14 3.2 Bus Isolation 16 3.2.1 Link Termination 16 3.3 Link Signal Specification . 16 3.3.1 Signal Configuration 16 3.3.2 Verified Transmit Parameters . 16 3.3.3 Test Equipment. 17 3.3.4 Transmit
7、 Test Procedures. 18 3.3.5 Verified Receive Parameters 21 3.3.6 Receive Test Procedures 22 FIGURE 1 CABLE PREPARATION FOR TESTS 6 FIGURE 2 EXAMPLE DIFFERENTIAL IMPEDANCE MEASUREMENT. 8 FIGURE 3 TIME DELAY SKEW EXAMPLE . 10 FIGURE 4 CONNECTOR PIN-OUT, MIL-DTL-38999 SERIES 3 SHELL SIZE A (9) 11 FIGURE
8、 5 CONNECTOR PIN-OUT, MIL-DTL-38999 SERIES 3 SHELL SIZE B (11) 12 FIGURE 6 CONNECTOR PIN-OUT, MIL-DTL-38999 SERIES 3 SHELL SIZE C (13) 13 FIGURE 7 600 PS EXCEPTION WINDOW EXAMPLE SHOWING 1.2NS/2 = 600 PS WINDOW 15 FIGURE 8 600 PS EXCEPTION WINDOW EXAMPLE SHOWING 110 +43.5/-21.9 DIFFERENTIAL 15 FIGUR
9、E 9 LINK MEASUREMENT POINTS (HALF CONNECTION IS SHOWN) . 16 TABLE 1 CABLE REQUIREMENTS 5 TABLE 2 LENGTH OF TEST SAMPLE 8 TABLE 3 QUADRAX CONNECTOR PIN-OUT 14 SAE AS5706 - 2 - TABLE 4 LINK SIGNAL TRANSMITTER CHARACTERISTICS (TP2) 17 TABLE 5 BER TEST DURATION. 18 TABLE 6 LINK SIGNAL RECEIVER CHARACTER
10、ISTICS (TP3) . 21 SAE AS5706 - 3 - 1. SCOPE This document establishes test plans/procedures for the AS5643/1 Slash Sheet. The AS5643/1 Slash Sheet establishes guidelines for the use of IEEE-1394b as a data bus network in military and aerospace vehicles. It encompasses the data bus cable and its inte
11、rface electronics for a system utilizing S400 over copper medium over extended lengths. 1.1 Purpose The purpose of this document is to establish test plans/procedures for the AS5643/1 Slash Sheet. This document is controlled and maintained by the SAE with technical support from subsystem vendors. 1.
12、2 Application The information herein may be used to assist the test of the subsystems that interface via the vehicles network. 1.3 Interpretation The following interpretations shall be placed upon these words, unless stated otherwise, where they are used in this document. May An allowed action Shall
13、 A mandatory requirement Should A recommended action Will A declaration of intent 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publication
14、s shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exempt
15、ion has been obtained. 2.1.1 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. MIL-STD-461E Department of Defense Interface Stand
16、ard, Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment MIL-HDBK-454A Department of Defense Handbook, General Guidelines for Airborne Electronic Equipment MIL-HDBK-5400 Military Handbook, Electronic Equipment, Airborne, General Guidelines SAE AS5
17、706 - 4 - 2.1.2 IEEE Publications Available from IEEE, 445 Hoes Lane, Piscataway, NJ 08854-1331, Tel: 732-981-0060, www.ieee.org. IEEE Std 1394-1995 IEEE Standard for a High Performance Serial Bus IEEE Std 1394a-2000 IEEE Standard for a High Performance Serial Bus, Amendment 1 IEEE Std 1394b-2002 IE
18、EE Standard for a High Performance Serial Bus, High Speed Supplement 2.2 Acronyms and Definitions BER Bit Error Rate C Celsius dB Decibels DC Direct Current ft Feet GHz Gigahertz Link The point-to-point connection between two ports LRU Line-Replaceable Unit mA Milliamps MBd Megabaud Mbits Megabits M
19、b/s Megabits Per Second MHz Megahertz ms Milliseconds mV Millivolts N/A Not Applicable pF Picofarad PHY 1394 Physical Interface Device ppm Parts Per Million ps Picoseconds UI Unit Interval, duration of one bit cell UUT Unit Under Test SAE AS5706 - 5 - V Volts VRMS Volts Root Mean Square Ohms 3. IEEE
20、-1394B REQUIREMENTS, S400 COPPER MEDIA The requirements are based on the IEEE Standard for a High Performance Serial Bus (IEEE-1394-1995), Amendment One (IEEE-1394a-2000), and High-Speed Supplement (IEEE-1394b-2002). This section delineates the options selected and interprets any ambiguities. 3.1 Ca
21、ble 3.1.1 Cable Requirements 3.1.1.1 Test Requirements Verify that the cable is of quad construction and contains two differential pair transmission lines (positioned on orthogonal axes) with nominal differential impedance of 110 . Verify that the insulated wires for the two differential pairs in th
22、e cable are color-coded as follows: pair 1 consists of one Blue wire and one Orange wire (Blue x Orange), and pair 2 consists of one Red wire and one Green wire (Red x Green). For the Blue x Orange pair, the blue wire connects to the positive signal and the orange wire connects to the negative of a
23、given port; for the Red x Green pair, the Red wire connects to the positive signal and the green wire connects to the negative of a given port. When connecting between two 1394b nodes, verify that one connects from the transmit (TX) of one port to the receive (RX) of the other. (For example, for the
24、 Blue x Orange pair, the Blue wire connects to TX+ and the Orange wire connects to TX- on one end of the cable, and the Blue wire connects to RX+ and the Orange wire connects to RX- on the other end of the cable.) Cable temperature will affect the values of the tests below; perform tests at 200 C or
25、 your applications maximum expected temperature. Verify that the cable meets all of the cable requirements identified in Table 1, as per the test procedures described in sections 3.1.1.2.1 through 3.1.1.2.6. TABLE 1 - CABLE REQUIREMENTS Dielectric Withstanding Voltage Conductor/Conductor (Maximum) 1
26、500 VRMS Dielectric Withstanding Voltage Conductor/Shield (Maximum) 1000 VRMS Capacitance (Typical) Between Pairs, Ground Floating 12 pF/ft Differential Impedance (100 to 500 MHz) 110 6 Temperature Range -55 to +200 C Insertion Loss at 250 MHz (Maximum, With Active Transformer) 6.0 dB Insertion Loss
27、 at 250 MHz (Maximum, With Passive Transformer) 2.0 dB Time Delay Skew (Maximum) Within Pairs 200 ps SAE AS5706 - 6 - 3.1.1.2 Test Procedures for Cable Requirements 3.1.1.2.1 Dielectric Withstanding Voltage a. Equipment: High Pot Tester (1500 VRMS voltage source minimum, 6 mA current detection minim
28、um) (Biddle Instruments Model # 230425 is one example). b. Setup: One end of the cable shall be prepared according to Figure 1. Expose 1/4 in of bare conductor on each of the 4 lines. This end will be connected to the High Pot Tester. The opposite end of the cable shall be prepared such as to ensure
29、 that no two conductors are in contact and that no conductors are in contact with the shield. FIGURE 1 - CABLE PREPARATION FOR TESTS c. Procedure: Conductor/conductor withstand voltage shall be tested by applying a 1500 VRMS test voltage between the following combinations of conductors: Blue - Red B
30、lue - Orange Blue - Green Red - Orange Red - Green Orange - Green d. Failure Criteria: A failure condition is defined by either an immediate short circuit or a leakage current in excess of 6.0 mA. It is suggested that 100% of the cable be tested for conductor/conductor withstand voltage 3.1.1.2.2 Di
31、electric Withstanding Voltage Conductor/Shield a. Equipment: High Pot Tester Tester (1000 VRMS voltage source minimum, 6 mA current detection minimum) (Biddle Instruments Model # 230425 is one example). b. Preparation: One end of the cable shall be prepared according to Figure 1. Expose 1/4 in of ba
32、re conductor on each of the 4 lines. This end will be connected to the High Pot Tester. The opposite end of the cable shall be prepared such as to ensure that no two conductors are in contact and that no conductors are in contact with the shield. SAE AS5706 - 7 - c. Procedure: Conductor/shield withs
33、tand voltage shall be tested by applying a 1000 VRMS test voltage between the following shield to conductor combinations: Blue - Shield Orange - Shield Red - Shield Green - Shield A failure condition is defined by either an immediate short circuit or a leakage current in excess of 6.0 mA. It is sugg
34、ested that 100% of the cable be tested for conductor/shield withstand voltage. 3.1.1.2.3 Capacitance Between Pairs a. Equipment: LCR Meter capable of capacitance measurements at 1 kHz (Agilent Model 6263B is one example). b. Preparation: One end of the cable under test shall be prepared according to
35、 Figure 1. Expose 1/4 in of bare conductor on each of the 4 lines. This end will be connected to the LCR meter. The opposite end of the cable shall be prepared such as to ensure that no two conductors are in contact and that no conductors are in contact with the shield. The length of the test sample
36、 shall be a minimum of 10 ft. c. Procedure: Connect the following differential pairs to the LCR meter: Blue - Orange Red - Green Measure the capacitance of the test sample at the 1 kHz setting. Divide this capacitance by the cable length in feet to produce a value of capacitance per foot. Each of th
37、e two differential pairs in the Quad construction (Blue/Orange and Red/Green) must be measured separately. A failure condition is defined by a capacitance measurement greater than 13.2 pF/ft (12 pF/ft +10% = 13.2 pF/ft). 3.1.1.2.4 Differential Impedance a. Equipment: Digital Sampling Oscilloscope wi
38、th Differential Time Domain Reflectometry (TDR) capable Sampling Module (minimum 5 GHz bandwidth) (Tektronix TDS 8000 with 80E04 Sampling Module is one example). b. Preparation: One end of the cable under test shall be prepared according to Figure 1. Expose 1/4 in of bare conductor on each of the 4
39、lines. This end will be connected to the sampling module. The opposite end of the cable shall be prepared such as to ensure that no two conductors are in contact and that no conductors are in contact with the shield. The length of the test sample shall be a minimum of 10 ft. c. Procedure: Connect th
40、e following differential pairs to the Sampling module: Blue - Orange - Shield Red - Green - Shield NOTE: Most equipment manufacturers use SMA connections to the sampling modules. Connecting the differential pairs of the Quad cable construction can be accomplished in many ways. The termination effect
41、s can significantly alter the impedance measurements. It is strongly recommended to make the impedance measurement at a point at least 2 in past the termination point. The measurement region should only include the first 4 to 5 ns of cable to minimize effects of A/C resistance of the conductors. How
42、ever, the entire length of cable under test should be analyzed for anomalous impedance spikes of 6 . SAE AS5706 - 8 - With the Sampling Module in the differential TDR mode, measure the reflection coefficient (rho) of the cable under test from a 100 Ohm reference standard. Most equipment manufacturer
43、s have automated the Impedance measurements on the equipment to read in Ohms. Each of the two differential pairs in the Quad construction (Blue/Orange and Red/Green) must be measured separately. See Figure 2 for example measurement. A failure condition is defined by an impedance measurement outside
44、of the 110 6 acceptance range. FIGURE 2 - EXAMPLE DIFFERENTIAL IMPEDANCE MEASUREMENT 3.1.1.2.5 Insertion Loss a. Equipment: Network Analyzer with Differential Baluns (capable of 250 MHz) (Agilent Model # 8753E with MaCom H-9 baluns is one example). NOTE: Agilent also sells 4 port Network Analyzers w
45、ith differential mode capabilities. b. Preparation: Both ends of the cable under test shall be prepared according to Figure 1. Expose 1/4 in of bare conductor on each of the 4 lines. For the length of the test sample see Table 2. The Insertion Loss measurement is a through measurement; therefore eac
46、h end of the cable under test will be attached to the test equipment. NOTE: Bulk testing the cable in this manner validates the assumptions used in the cable selection guide. TABLE 2 - LENGTH OF TEST SAMPLE AWG Cable Test Length (feet) 22 73 24 59 26 47 28 38 30 30 SAE AS5706 - 9 - c. Procedure: Cal
47、ibrate the Network Analyzer over a frequency range inclusive of 250 MHz. Connect the following differential pairs to the Network Analyzer: Blue - Orange - Shield Red - Green - Shield Once the cable under test is attached to the Network Analyzer, measure the Insertion Loss in dB at 250 MHz. Each of t
48、he two differential pairs in the Quad construction (Blue/Orange and Red/Green) must be measured separately. For systems using active transformers a measurement 6.0 dB per cable test length at 250 MHz is considered a failure condition. For systems using passive transformers a measurement 2.0 dB per c
49、able test length at 250 MHz is considered a failure condition. 3.1.1.2.6 Time Delay Skew This test is used to determine the variance in the electrical length between two conductors in the same pair. A Time Domain Reflectometer is used to generate two fast rise time differential pulses simultaneously on both conductors of a pair. At the opposite end of the cable, the voltage zero crossings of each conductor will be viewe
