Take for example USB-PD.

And, we won’t meet the USB spec. 2.

To supply power other devices beyond the USB 10W power range .

To supply power other devices beyond the USB 10W power range .

To supply power other devices beyond the USB 10W power range .

Of USB vs DVD, I prefer DVD,  because storage of DVDs is easier than storage of assorted shape-and-size usb adapters.  

To supply power other devices beyond the USB 10W power range ii.

To supply power other devices beyond the USB 10W power range .

To supply power other devices beyond the USB 10W power range .

To supply power other devices beyond the USB 10W power range ii.

Several years ago we had a similar experience with the IEEE 1394 and USB specifications.

Orlando TG3a Minutes March, 1994 DOC: IEEE P802.11-94/xxx July 2004 IEEE P802.15-04/377r4 IEEE P802.15 Wireless Personal Area Networks Project IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Title Consolidation of Explanations for No Vote on Confirmation Date Submitted 15 July 2004 Source [Gerald W.

IEEE Std 1667-2009, IEEE Standard for Authentication in Host Attachments of Transient Storage Devices !

To supply power other devices beyond the USB 10W power range   ii.

The USB cable connecting the VR HMD and the local server is used to exchange the head tracking data so the server can render the video and the audio data accordingly.

Can you outline the adaptation of the DS-UWB solution wrt. to its higher layer interfaces such as OHCI for USB, 1394 4.)

Thanks to the wide adoption of USB for low power products, I actually get annoyed when I get yet another USB power supply with my product. 

IEEE802.3dg Task Force, May 2024 Data Acquisition (DAQ) used for measurements 3 75Ω 0.001uF 3000V 0.1uF 50Ω 50Ω 0 ADC 2x SP4020-01FTG 2.5pF @ 0V, 1MHz ½ Pulse HX1260NL (100BASE-Tx) 150Msps 0.001uF 3000V 4.7MΩ Local Ground +DCPower Supply SPE connector per IEC 63171-6 Plated M3 hole for shield grounding Plated M3 hole for board grounding ADC + IEEE802.3dg Task Force, May 2024 ► Cable for connecting of motor setup incl. encoder and positioner with motor drive / controller ► Cable includes power & brake lines together with communication lines within one cable ► FFE[4G2,5+(2x1)ST/N+(2xAWG22)ST/SN/RE]ST/PUR Hybrid Cable 4 Brake pair Brake shield Motor Power (PWM) Motor Power (PWM) Motor Ground (PE) Communication twisted pair Communication shield Overall shield IEEE802.3dg Task Force, May 2024 Variant 1 ArmorKinetix Distributed Servo Drive (DSD) 5 IEEE802.3dg Task Force, May 2024 ArmorKinetix Distributed Servo Drive (DSD) 6 U V W PE BRK+ BRK– DATA+ DATA– POSITIONER MOTOR DAQ MDI+ DAQ FEEDBACK PWM (50ns rise time) 3m HYBRID CABLE MOTOR SETUP MOTOR SIDEDRIVE SIDE MDI– Shield Ferrite Bead Power Adapter 115Vac / 15Vdc DRIVE / INVERTER Ferrite Bead Power Adapter 115Vac / 15Vdc IEEE802.3dg Task Force, May 2024 ArmorKinetix Distributed Servo Drive (DSD) 7 Motor Drive 3 m Hybrid PWM Cable (modified for measurement) Motor-end DAQ Drive-end DAQ Controller and Touch Interface (On/Off/Speed) Power and Comm to Drive (not SPE) ► PWM with 50ns rise time ► 3m Hybrid Cable ► DAQ pair measures coupled PWM interference at each end ► Drive controls PWM to motor  Held in position at zero speed is worst case ► PC uses USB to attach to each DAQ to collect measurement Measurement collection PC with USB for DAQ attachment Raised Platform Conductive Reference Plane IEEE802.3dg Task Force, May 2024 ► The Data Acquisition (DAQ) on one side of the cable transmitting PAM3 1Vpp signal ► The DAQ on the other side of cable capturing the signal ► No visible attenuation / distortion of the signal on 3m hybrid cable PAM3 1Vpp Signal 8 -1.0 -0.5 0.0 0.5 1.0 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, Motor not powered, PAM3 1Vpp -1.0 -0.5 0.0 0.5 1.0 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8 Vo lts uSeconds Hybrid cable 3m, Motor not powered, PAM3 1Vpp IEEE802.3dg Task Force, May 2024 ► The Drive outputs 3-phase PWM signal ► The Drive keeps the Motor in “hold” position  Motor supplied by PWM signal, but not turning  Identified as the worst-case condition ► The DAQ on both sides capturing the signal coupled from the PWM power lines to the communication differential pair ► The bottom capture is the same setup ► The Motor is turning the (max.) rated speed  The signal coupled to the communication pair is much lower amplitude Signal Coupled to Communication Pair 9 -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Motor holding, Drive side -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Motor holding, Motor side -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Rated speed, Motor side IEEE802.3dg Task Force, May 2024 Change in grounding – DAQ GND to cable GND 10 U V W PE BRK+ BRK– DATA+ DATA– POSITIONER MOTOR DAQ MDI+ DAQ FEEDBACK PWM HYBRID CABLE MOTOR SETUP MOTOR SIDEDRIVE SIDE MDI– Shield Ferrite Bead Power Adapter 115Vac / 15Vdc DRIVE / INVERTER Ferrite Bead Power Adapter 115Vac / 15Vdc DAQ GND disconnected from setup ground plain DAQ GND connected to shield of the cable / connector IEEE802.3dg Task Force, May 2024 Signal Coupled to Communication Pair (Change in grounding – DAQ GND to cable GND) 11 -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Motor holding, Drive side, DAQs grounded to cable connectors -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Motor holding, Motor side, DAQs grounded to cable connectors IEEE802.3dg Task Force, May 2024 Change in grounding – Motor GND only via cable 12 U V W PE BRK+ BRK– DATA+ DATA– POSITIONER DAQ MDI+ DAQ FEEDBACK PWM HYBRID CABLE MOTOR SETUP MOTOR SIDEDRIVE SIDE MDI– Shield Ferrite Bead Power Adapter 115Vac / 15Vdc DRIVE / INVERTER Ferrite Bead Power Adapter 115Vac / 15Vdc MOTOR Motor GND disconnected from setup ground plain IEEE802.3dg Task Force, May 2024 Signal Coupled to Communication Pair (Change in grounding – Motor GND only via cable) 13 -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Motor holding, Drive side, Motor grounded via cable only -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Motor holding, Motor side, Motor grounded via cable only IEEE802.3dg Task Force, May 2024 Oscilloscope Captures (ArmorKinetix, 3 m, 50 ns) 14 U V W PE BRK+ BRK– DATA+ DATA– POSITIONER MOTOR DAQ MDI+ DAQ FEEDBACK PWM HYBRID CABLE MOTOR SETUP MOTOR SIDEDRIVE SIDE MDI– Shield Ferrite Bead Power Adapter 115Vac / 15Vdc DRIVE / INVERTER Ferrite Bead Power Adapter 115Vac / 15Vdc Isolated Differential Oscilloscope Probes ► CH1 and CH2 each measure CM to shield at SPE +/- ► Scope M1 calculates DM ► Allows line-side and PHY-side comparison In-line Measurement PCB Isolated Probe Pair Simultaneous DAQ Measurement IEEE802.3dg Task Force, May 2024 ► Wide capture without ADI test pattern to confirm presence of PWM  DAQ has limited storage ► PWM transients every 125 us Oscilloscope Capture – PWM 15 ArmorKinetix IEEE802.3dg Task Force, May 2024 ► ArmorKinetix with 3 m cable ► Short capture to see single PWM event  Without ADI test pattern ► PWM pulses response persists for > 3 us ► Oscilloscope filters @ 1 GHz  DM measures less than CM by ~2x  M1 = 480 mVpp exceeds amplitude at DAQ Oscilloscope Capture – PWM 16 IEEE802.3dg Task Force, May 2024 ► ArmorKinetix with 3 m cable ► Short capture to see oscillations in single PWM event  Without ADI test pattern ► Oscilloscope filters @ 20 MHz  It was presumed that the HF interference ADDED to the desired signal to create mismatch of the oscilloscope measurement with the ADI board (which has some HF filtering)  DM measures less than CM by ~5x  M1 = 220 mVpp better matches amplitude at DAQ ► Oscillations are ~125 ns (8 MHz)  Relates to cable electrical length Oscilloscope Capture – PWM 17 IEEE802.3dg Task Force, May 2024 ► PWM pulses response persists ~3us ► Differential amplitude ~140mVpp ► Oscillations are ~125ns Signal Coupled to Communication Pair (in presence of oscilloscope probes) 18 -0.10 -0.05 0.00 0.05 0.10 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 3m, PWM 50ns rise time, Motor holding, Motor side, with Oscilloscope probes IEEE802.3dg Task Force, May 2024 Variant 2 Kinetix 5700 Dual Axis Inverter 19 IEEE802.3dg Task Force, May 2024 Kinetix 5700 Dual Axis Inverter 20 U V W PE BRK+ BRK– DATA+ DATA– POSITIONER DAQ MDI+ DAQ FEEDBACK PWM (200ns rise Time) 18m HYBRID CABLE MOTOR SETUP MOTOR SIDEDRIVE SIDE MDI– Shield Ferrite Bead Power Adapter 115Vac / 15Vdc DRIVE / INVERTER MOTOR Power 24Vdc IEEE802.3dg Task Force, May 2024 ► PWM with 200ns rise time ► 18m Hybrid Cable ► DAQ pair measures coupled PWM interference at each end ► Inverter controls PWM to motor  Held in position at zero speed is worst case ► PC uses USB to attach to each DAQ to collect measurement Kinetix 5700 Dual Axis Inverter 21 Motor Inverter (1 of N) 18 m Hybrid PWM Cable (modified for measurement) Motor-end DAQ Inverter-end DAQ Controller (hidden) and Touch Interface (On/Off/Speed) 3-ϕ Power and Comm to Inverter (not SPE) Measurement collection PC with USB for DAQ attachment (not shown) Raised Platform Conductive Reference Plane IEEE802.3dg Task Force, May 2024 ► The Data Acquisition (DAQ) on one side of the cable transmitting PAM3 1Vpp signal ► The DAQ on the other side of cable capturing the signal ► Little attenuation / distortion of the signal on 18m hybrid cable PAM3 1Vpp Signal 22 -1.0 -0.5 0.0 0.5 1.0 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 18m, Motor not powered, PAM3 1Vpp -1.0 -0.5 0.0 0.5 1.0 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8 Vo lts uSeconds Hybrid cable 18m, Motor not powered, PAM3 1Vpp IEEE802.3dg Task Force, May 2024 ► The Drive outputs 3-phase PWM signal ► The Drive keeps the Motor in “hold” position  Motor supplied by PWM signal, but not turning  Identified as the worst-case condition ► The DAQ on both sides capturing the signal coupled from the PWM power lines to the communication differential pair Signal Coupled to Communication Pair 23 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 Vo lts uSeconds Hybrid cable 18m, PWM 200ns rise time, motor holding, drive side -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 7 7.

90538S - WPAN Bluetooth Tutorial Office 97 "The Bluetooth Specification is still preliminary.

Orlando TG3a Minutes March, 1994 DOC: IEEE P802.11-94/xxx July 2004 IEEE P802.15-04/377r2 IEEE P802.15 Wireless Personal Area Networks Project IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Title Consolidation of Explanations for No Vote on Confirmation Date Submitted 14 July 2004 Source [Gerald W.

Orlando TG3a Minutes March, 1994 DOC: IEEE P802.11-94/xxx July 2004 IEEE P802.15-04/377r3 IEEE P802.15 Wireless Personal Area Networks Project IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Title Consolidation of Explanations for No Vote on Confirmation Date Submitted 15 July 2004 Source [Gerald W.

6 Conclusion  Current preference is 8b/10b for 2.5Gb/s and 64b/66b for 5Gb/s – The current Ethernet backplane ecosystem utilizes 8b/10b encoding – Based on 3Gbps SAS experience, my assumption is that 2.5Gb/s will be robust with 8b/10b encoding – Based on 6Gbps SAS experience, I’m not convinced that 5Gb/s with 8b/10b will be robust enough • 6Gbps SAS is 8b/10b encoded, uses data scrambling , and has receiver training • Further group discussions with Ethernet experts are needed – Supporting multiple coding schemes is common in other standards • USB, PCIe, and FCAL currently support multiple coding schemes depending on bit rate • SAS4 will transition from 8b/10b as well

. • Timeframe discussion o Standard Ballot – this year USB pushing 100W by/in 2012 HDBase-T pushing 100W on Cat5 Ethernet IEEE PoE may develop 100W as well (non-bundled cable env) • Scope of conformity/certification o Should UPAMD cert be the last item on the path, or run in parallel to FCC, UL, etc cert/logo.

. , Gang Wu Thu, 20 Nov 2003 02:17:58 -0500 (EST) stds-802-mobility: Fw: Formation of a Study Group in 802.18 on "Unlicensed Use of Unused TV Broadcast Spectrum" , Gang Wu Wed, 19 Nov 2003 18:33:23 -0500 (EST) stds-802-mobility: USB Storage Device Left at 802.20 Meeting , Jerry1upton Tue, 18 Nov 2003 13:26:37 -0500 (EST) stds-802-mobility: 2004 WiFi Voice Conference , mwinkhler Tue, 18 Nov 2003 04:43:54 -0500 (EST) stds-802-mobility: Our web site has been updated , Gang Wu Mon, 17 Nov 2003 14:43:59 -0500 (EST) 802.18 doc , Stevenson, Carl R (Carl) Thu, 13 Nov 2003 20:51:27 -0500 (EST) another .18 doc , Stevenson, Carl R (Carl) Thu, 13 Nov 2003 18:13:15 -0500 (EST) Date: Thu, 13 Nov 2003 16:08:56 -0500 , Stevenson, Carl R (Carl) Thu, 13 Nov 2003 16:17:55 -0500 (EST) Return to top of Page Mail converted by MHonArc

body=INFO%20STDS-802-SEC > List-owner : < mailto:STDS-802-SEC-request@LISTSERV.IEEE.ORG > List-subscribe : < mailto:STDS-802-SEC-subscribe-request@LISTSERV.IEEE.ORG > List-unsubscribe : < mailto:STDS-802-SEC-unsubscribe-request@LISTSERV.IEEE.ORG > References : <012701d599c5$0c34eda0$249ec8e0$@gmail.com> Reply-to : Jon Rosdahl < jrosdahl@ieee.org > Sender : ***** IEEE 802 Executive Committee List ***** < STDS-802-SEC@ieee.org > also remember that if they have the USB then they do not download.