Open Rack Specification 2.1 Update

Slides:



Advertisements
Similar presentations
Simulation and Evaluation of Various Block Assignments Evaluation of multiple carriers deployed in a channel block evaluation criteria section.
Advertisements

GTEM CABLE EMISSION STUDIES MEASUREMENT TECHNOLOGY LIMITED JUNE 29 TH 2010 Dr. Zaid Muhi-Eldeen Al-Daher Dr. Angela Nothofer Prof. Christos Christopoulos.
Wireless Data Acquisition and Control How Antennas Work Copyright © 2008 Wilkerson Instrument Co., Inc All rights reserved 3 Element Yagi Yagi Horizontal.
Satellite Television 1 It’s out of sight! 22,300 miles in fact!
RTCA DO-160 Section 20 Working Group Billy M. Martin Cessna Aircraft.
Transfer Functions in EMC Shielding Design
Flat-Panel Grid Antenna R Struzak. This antenna offers ~18 dBi gain, VSWR
Doc.: IEEE /0630r0 Submission May 2015 Intel CorporationSlide 1 Verification of IEEE ad Channel Model for Enterprise Cubical Environment.
Introduction to Space Systems and Spacecraft Design Space Systems Design Communications - Antennas Ref: SMAD Sections – 13 Communications Architecture.
Electromagnetic Wave Theory
July 2015 doc.: IEEE /XXXXr0 July 2015
Accredited Standards Committee C63® - EMC
ESTeem Training Class Antenna Fundamentals. Decibels (dB) Used for all mathematical calculations in the radio world. – dB is a logarithmic number dB =10.
Done by عماد خليل العجلة علاء خليل العجلة Instructor د. محمد عودة Electromagnetic interference 1.
RADAR SPECTRUM ENGINEERING CRITERIA (RSEC) A Comprehensive Review
Chapter 10 Web splice.
Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page.
General Licensing Class G9A – G9D Antennas Your organization and dates here.
FAA/NASA Joint University Program for Air Transportation Research Jeff Dickman Chris Bartone June 20, 2003 A New Anechoic Chamber for Nearfield Antenna.
Namaste Project 3.4 GHz Interference Study Preliminary document - Work in Progress updated The intent of this study is to collect data which may.
Washington Laboratories (301) web: Lindbergh Dr. Gaithersburg, MD How to List a Test Site.
Investigating EMC policies for the SKA Paul van der Merwe Prof. HC Reader Stellenbosch University.
Copyright 2005 International EMC Standards Activity 1 EMC International Standards Update CISPR SC A and I Activity Don Heirman Don HEIRMAN Consultants.
BICON / HYBRID COMPARISON Performed by members of the TCB Council ANSI C63 SC 1 April 18, 2012.
EMC Evaluation at Green Bank: Emissions and Shield Effectiveness National Radio Astronomy Observatory Carla Beaudet Green Bank RFI Group Leader.
Design and Miniaturization of an RFID Tag Using a Simple Rectangular Patch Antenna for Metallic Object Identification Mun Leng Ng Auto-ID Adelaide.
Author: Bill Buchanan Wireless LAN Unit 6 Radio and RF Wireless LAN Unit 6 Radio and RF.
Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page.
®®® Total EMC Products is the trademark of AMIC A MIC Advanced Materials & Integration Co., Ltd. http : / / WWW. AMIC. Co. Kr ISO 9001 /  EXSOB.
Project: IEEE P Working Group for Wireless Personal Area Networks(WPANs) Submission Title: Link Budget for m Date Submitted: 5 March 2012.
Senior Project – Electrical Engineering Amateur Radio Repeater Daniel Harkenrider Advisor – Professor James Hedrick Abstract There are a number.
Radio links Seminary 7. Problem 7.1 Free space (one way / line-of-site) propagation a) Calculate the section attenuation of a 10 km long radio link operating.
Measurements using a GTEM cell above 1GHz Dr Tian Hong LOH.
LOGO A Multi Unsymmetrical Beam Tapered Slot Ya-gi Antenna with λ/4 for PMMW Imaging  Presenter: Ya Chung Yu.
July 2002doc.: IEEE /420r0 Submission Rishi Mohindra, MAXIMSlide 1 2-Channel Option for 11g (proposal) Rishi Mohindra MAXIM Integrated Products.
Doc.: IEEE /1044r0 Submission September 2008 Alexander Maltsev, IntelSlide 1 60 GHz WLAN Experimental Investigations Date: Authors:
Receive Antenna Performance Comparison. Receive Antenna Monitoring The receive antenna was installed in its permanent location inside the chamber A spectrum.
Committed to Connecting the World March 2011 Geneva, March 2011 Presentation of the Recommendation ITU-T K 100: Presentation of the Recommendation.
Informations and comments on ECE-TRANS-WP.29-GRB e 1 Louis-Ferdinand PARDO (France) Transmitted by the expert from France Informal document GRB
1) A binary transmission system uses a 8-bit word encoding system. Find the Bandwidth and the SNR dB of the system if the channel capacity is bps.
Limits of space loss calculations. Near Field / Far Field Far field implies a plane wave. A plane wave is an asymptotic extrapolation of a spherical.
Doc.: t Submission September 2007 Anthony Maida, 3eTI, Inc.Slide 1 Recommendations for Comments on COAT Section Date: Authors:
Moxon Beams Design & Building by WB5CXC 2006 Ham - Com.
Telecommunications JBCardenas © 1982 Com3 4Q1516 Antenna Design JBC © 198 v A2,2 Key design requirements 1.Undertake the theoretical computations of shapes.
EMC issues for cabling and racks layout design. (Belle II – Grounding) F.Arteche.
Date of download: 6/23/2016 Copyright © 2016 SPIE. All rights reserved. A schematic design of the all-dielectric polymer waveguide E-field sensor (a).
Piero Belforte, CSELT 1999: AEI_EMC_, EMC basics by Flavio Maggioni.
By: Dr.Lway Faisal Abdulrazak
Software TS9975 uses EMC32. I-Key -> E+.
Ultra Wideband UK Test Results Presented by John Mettrop UK CAA
Resolution 606 Interference from RNSS to radars in the 1215 – 1300 MHz band Philippe GERARD Agence Nationale des Fréquences Mars 2001 AMCP.
Sebastian Büttrich, NSRC edit: March 2011
Long Wire antennas Vee antenna and Rhombic antenna Book sources: K. D. Prasad, J. D. Krauss.
CReSIS Electromagnetic Anechoic Chamber at the University of Kansas
Transfer Functions in EMC Shielding Design
An Update on Component Shielding Effectiveness Testing
Proposed 6G SAS Phy Specs for EMI Reduction
2-Channel Option for 11g (proposal)
GSM Base Station Antennas
Recommendations for Comments on COAT Section
Submission Title: Link Budget for m
the least path loss? E3A03 A. When the moon is at perigee
Feed & Front End PDR—Sys. Reqts
Wireless Communications Chapter 4
Recommendations for Comments on COAT Section
OTA Comparison test results and test design
TPC Comments Date: Authors: January 2005
Shielding requirements for the baseline bunker shielding (current CATIA version ) Günter Muhrer
OCP Engineering Workshop Rack & Power, Advanced Cooling Solutions, Data Center Facility
What is Radiated Emission Limits?
Presentation transcript:

Open Rack Specification 2.1 Update Rack and Power Open Rack Specification 2.1 Update Steve Mills Technical Lead Facebook

Agenda Busbar Thickness Tolerance Reduction Reduce Rack Frame Tolerance Add Appendix D: Optional Rack-level EMI test guidance Replace Deleted Figures 19-22 Agenda

Proposed Changes for 2.1 Busbar Thickness Tolerance Reduction Reduce Rack Frame Tolerance Add Appendix D: Optional Rack-level EMI test guidance Replace Deleted Figures 19-22 Proposed Changes for 2.1

Busbar Thickness Tolerance Reduction 2x 3+/-0.13

Proposed Changes for 2.1 Busbar Thickness Tolerance Reduction Reduce Rack Frame Tolerance Add Appendix D: Optional Rack-level EMI test guidance Replace Deleted Figures 19-22 Proposed Changes for 2.1

Reduce Rack Frame Tolerance 645+1/-0.6 789.6+1/-0.6

Proposed Changes for 2.1 Busbar Thickness Tolerance Reduction Reduce Rack Frame Tolerance Add Appendix D: Optional Rack-level EMI test guidance Replace Deleted Figures 19-22 Proposed Changes for 2.1

Add Appendix D: Optional Rack-level EMI test guidance D.1 Shielding Effectiveness Measurements The objective of this section is to provide the technical guideline for shielding effectiveness measurements of the rack. In order to insure EMC compliance to the regulatory agency limits, racks may need to be designed with optional doors and side enclosure that can provide some level of EMI shielding. Depending on the products contained in the rack and the countries where the rack will be located, different levels of shielding may be required. Shielding effectiveness (SE) is generally defined as the ratio between the field strength, at a given distance from the source, without the shield interposed and the field strength with the shield interposed. A target shielding effectiveness can be defined by the final system integrator, when the rack needs to be designed to provide the EMI shielding.

Add Appendix D: Optional Rack-level EMI test guidance D.2 Shielding Effectiveness Measurement Methodology The proposed measurement methodology is very similar to the methodology used for the Radiated Emission measurements according to ANSI C63.4 standard. First a Radiated Emission Reference Level is obtained by using an RF signal source placed inside the empty rack with no shielding doors. Comb generators are the recommended RF signal source for the following SE measurement procedure. The Comb generators should have sufficient strength to be at least 20-30 dB above the noise floor, generating continuous RF signals or discrete harmonics spaced no more than 20 MHz apart. Different Comb generators may be used for different frequency ranges.

Add Appendix D: Optional Rack-level EMI test guidance Reference Level Measurement: Eref (dBuV/m) Place the empty rack on turntable in EMI chamber. All detachable doors and panels should be removed from the rack. Position a Comb generator (30MHz to 1GHz) inside center of rack, 50 cm above the turntable ground plane, and with the antenna element at least 15 cm from all rack metal surfaces. Measure the reference emission level, Eref (dBuV/m) from antenna at 10m distance from the source. The turntable should be rotated from 0 to 360 degrees, and the antenna should be moved between 1m to 4m height for horizontal and vertical polarizations. Record the maximum reading from spectrum analyzer. The RF source used should have 20MHz (or lower) steps between 30MHz to 1GHz. Change the position of the RF signal source to 1m height, and repeat c) ~e. Change the position of the RF signal source to 1.5m height, and repeat c) ~e. Change the signal source (Comb generator, 1GHz to 18GHz), and repeat b) ~f). For this frequency range, the receiving antenna should be located at 3m distance from the source.  

Add Appendix D: Optional Rack-level EMI test guidance   Rack Emission Measurement Put all doors and panels back to original position while keeping the rack at same position. Repeat above steps b) ~g), and record the maximum reading, Erack (dBuV/m. SE Calculations Calculate SE: SE(dB) = Eref (dBuV/m) - Erack (dBuV/m).

Proposed Changes for 2.1 Busbar Thickness Tolerance Reduction Reduce Rack Frame Tolerance Add Appendix D: Optional Rack-level EMI test guidance Replace Deleted Figures 19-22 Proposed Changes for 2.1

Replace Deleted Figures 19-22

Questions?