DTE Power Objectives
Hello All,
I am planning to perform some testing of the noise injection
characteristics of DTE Power on some 10/100T PHYs to determine
if we gain a benefit by using the "unused pairs" for power
distribution. I am building a board that allows me to hook
up a switching power supply and a switching load to the center
tap of the data-pairs and the non-data-pairs. I can also use
a signal generator/network analyzer to evaluate the common-mode
to differential conversion factors.
I am wondering who else is working on this and whether the
other items on the list are being addressed. We are getting
pretty short on time for the next meeting.
Regards,
Dan Dove
___________ _________________________________________________________
_________ _/ ___________ Daniel Dove Principal Engineer __
_______ _/ ________ dan_dove@xxxxxx LAN PHY Technology __
_____ _/ ______ Hewlett-Packard Company __
____ _/_/_/ _/_/_/ _____ Workgroup Networks Division __
____ _/ _/ _/ _/ _____ 8000 Foothills Blvd. MS 5555 __
_____ _/ _/ _/_/_/ ______ Roseville, CA 95747-5555 __
______ _/ ________ Phone: 916 785 4187 __
_______ _/ _________ Fax : 916 785 1815 __
__________ _/ _________________________________________________________
I n v e n t !
DTE ISSUES MATRIX
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AC or DC Power?
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- AC Frequency, voltage, other issues?
- DC Switcher impulses, filtering, other issues?
Detection Method?
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- FatLinkPulses
- Diode Detection (Current Sense)
- Diode Detection (Voltage Sense)
- Constant Current Sink
- Other?
Which pairs?
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- 12,36 impact on 10/100
- DM/CM conversion characteristics vs frequency *** Can do
- 100BASE-T noise immunity *** Can do
- Switcher frequency content *** Can do
- 45,78 impact on installed base coverage
- CM/CM coupling between pairs *** Maybe can do
EMI
---
Common-mode insertion
- Conducted EMI
- Radiated EMI
- Susceptibility
MidSpan Insertion
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- Transformer coupling *** Can do
- Return Loss w/wo power *** Can do
- Insertion Loss *** Can do
- EMI
- Susceptibility
- Detection method compatibility
Safety
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- SELV limits
- Japanese or other International limits