RE: [SI-LIST] : Production test of 10/100 ethernet conn ??

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From: Farrokh Mottahedin (Farrokh.Mottahedin@quantum.com)
Date: Thu Mar 30 2000 - 13:58:04 PST


Testing each and every productoin I/O port for signal integrity is an
expensive proposition. For the purposes of signal characteristics and
analog validation, a sampling test of your production run may be performed.
In the case of 1394 high speed serial bus or Firewire (a network-like bus),
the following measurements are recommended:

Signal Amplitude - Differential signal amplitude at the transmitter &
receiver
Common Mode (output) Voltage
Common Mode (input) Voltage
Common Mode (output) Noise
Signal Overshoot and Ringing
Cable Media Signal Timing Validation
Signal Rise & Fall Times
Jitter and Skew for Different Data Rates

Regards,

Farrokh Mottahedin
Quantum Corp.
500 McCarthy Blvd.
Milpitas, CA 95035
(408)324-7934
farrokh.mottahedin@quantum.com

-----Original Message-----
From: Stuart Adams [mailto:sja@brightstareng.com]
Sent: Thursday, March 30, 2000 10:39 AM
To: si-list@silab.eng.sun.com
Subject: [SI-LIST] : Production test of 10/100 ethernet conn ??

 What sort of manufacturing/production tests are people
 using on network (say 10/100 ethernet) I/O ports ??

 I assume that just hooking it to a hub and seeing if
 "it works" is not sufficient since a missing or wrong
 value termination resistor in the magnetics section
 might yield a working connection inspite of
 terrible SI on the tx/rx pairs.

-- Stuart

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