SMPTE-DC Section Meeting - February 2017

Event Type: 
Section Meeting
Event Date: 
Thursday, February 23, 2017 - 19:00 to 21:00
1771 N Street NW
20036 Washington, DC
United States
Event Details: 

Thursday, February 23, 2017 (special date)

7:00pm: Social, Networking & Refreshments
7:30pm: Meeting, & Presentation

NAB Headquarters
1771 N Street, NW
Washington, DC 20036

Joseph Cornwall, LeGrand

PROGRAM: HDBaseT Deep Dive

The HDBaseT standard defines a protocol for communicating 5Play (video, audio, network, control, power) over a single long distance category cable or an optical fiber link.  Building on the adopted HDBaseT specifications IEEE P1911.1.1, and P1911.2, the P1911.3 standard describes the variety of cables that the protocol can transfer over, expanding wireless compatibility, increasing power throughput over the HDBaseT link, harmonizing with Internet Protocol (IP), and adding security feature.

This presentation will explore the similarities and differences between HDBaseT and IEEE 802 1000BaseT Gigabit Ethernet and 10GBaseT.  We will start by answering a simple question that is often overlooked in AV training: What is in that wire?  We will define Pulse Amplitude Modulation coding (PAM) and examine the differences between PAM5 as its deployed in a 1000BaseT LAN and PAM16 as it is deployed in an HDBT application.

This presentation will look at NEXT, PSNEXT, FEXT, ELFEXT, and AXT in order to explore the effect of various classes of crosstalk on the digital video payload under consideration in an HDBaseT installation.  Additional exploration will include Electromagnetic Interference, signal attenuation and Attenuation-to-Crosstalk ratio to better understand the environment in which the HDBaseT signal exists.  We will compare and contrast this environment with its closest cousin – AV over IP.


In an effort to better predict turnout are now using Eventbrite for monthly meetings.  If you expect to attend please register.  There is no obligation, and unregistered walk-ins are still welcome, but this will help us gauge room size and refreshment orders in advance.

The NAB building is at the junction of N Street, 18th Street, and Connecticut Avenue, just south of DuPont Circle.  There is street and garage parking on many blocks in the vicinity - check signs and meters for hours!  The closest METRO stops are DuPont Circle (Red line - two blocks) and Farragut West (Orange/Blue lines - four blocks)

March 16 2017:  Meeting with Student Section at Loyola University, Baltimore
April 2017:     No meeting (NAB 2017)
May 24/25:    Bits By The Bay - Annual 2-Day Conference in Chesapeake Beach, MD