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Hi Yair,
Your editing instruction says "Change Table 145-17 as is". That puts the editor in a really awkward position... do I change it ? Do I change it and change it back ?
On a more serious note, I would find it very unlikely anyone is going to bother testing unbalance with resistances precise down to the milliohm range. Considering that resistors have a temperature coefficient that completely blasts the 1% precision away when exposed to the amount of current needed to test unbalance.
I would suggest the following roundings which actually make the range a bit wider:
0.087 => 0.08 0.101 => 0.1 5.41 => 5.4 6.25 => 6.3
Also, rounding RCH_unb_min/max but not rounding Rpd_min/max produces no net gain. After all, the requirement is on the SUM of those resistances.
We also need to round Rpd_min and max.
Finally, Table 145-17 says "All resistances within 1% range" should say "+/- 1% range".
Kind regards,
Lennart From: Yair Darshan <YDarshan@xxxxxxxxxxxxx>
Sent: Tuesday, May 16, 2017 15:41 To: STDS-802-3-4PPOE@xxxxxxxxxxxxxxxxx Subject: [802.3_4PPOE] Comment #51 - TDL #129 Part A- Rounding resistor values in Table 145-17 to 1% Hi guys, Please see attached. I’ll appreciate your review. Thanks Yair
Darshan Yair Chief R&D Engineer Analog Mixed Signal Group Microsemi Corporation
1 Hanagar St., P.O. Box 7220
Cell: +972-54-4893019
E-mail: <mailto:ydarshan@xxxxxxxxxxxxx>.
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