In my opinion, we need to find the optimal solution for the overall system without over constraining the PHY development with extreme Insertion Loss. Unlike previous IEEE projects in the Enterprise space, there is no “installed base” for this automotive application. All RTPGE installations will require new harnesses and “green field” applications. I would suggest that we provide Insertion Loss equation based on Cat6A / Class Ea with scaling factor for gauge size and temperature de-rating co-efficient. By doing this, PHY designer can optimize their proposal with any combination of gauge size and temperature range to meet the end customer’s requirements.
Regards,
Todd Herman
Sr. Engineering Manager
CommScope
1300 East Lookout Drive, Suite 150
Richardson, Texas 75082 USA
phone: 1-972-792-3128
cell: 1-469-236-4948
therman@xxxxxxxxxxxxx
From: Christopher DiMinico [mailto:CDimi80749@xxxxxxx]
Sent: Monday, April 01, 2013 8:30 AM
To: STDS-802-3-RTPGE@xxxxxxxxxxxxxxxxx
Subject: [802.3_RTPGE] Link segment insertion loss and cable gauge
Colleagues,
Coming out of the March meeting (see link below to minutes), we have identified 26 AWG stranded as a "target" cable gauge to consider based on RTPGE survey responses (see link below). Please note, I expect, consistent with other copper IEEE 802.3 link segments, other cable gauge sizes (e.g., 24 AWG, 28 AWG, 30 AWG) may be used to build compliant RTPGE link segments (i.e., link segments have been specified without a requirement for cable gauge). The maximum link segment insertion losses for the 15 meter topology listed in the RTPGE objectives is characterized using 26 AWG stranded in order to address the survey response requests.
Regards, Chris DiMinico
MC Communications
Channel definitions Ad hoc co-chair
meeting minutes (unconfirmed)
http://www.ieee802.org/3/bp/public/mar13/minutes_3bp_u_0313.pdf
The survey is targeted at automotive OEMs and suppliers to be used
to assist the IEEE 802.3 Reduced Twisted Pair Study Group
(RTPSG) in developing link segment objectives and project criteria.
Reduced Twisted Pair Gigabit Ethernet Link Segment Characteristics
Reduced Twisted Pair Gigabit Ethernet PHY Study Group Objectives
APPROVED 802.3 WG (November 15, 2012)