Rim Semiconductor Company (fka RSMI)

[excel]

I decided to send my post to John and get his thoughts regarding BER rate. This is the results below. Hope this helps us understand this better.

Greg,

Attached is the response I got from Al and Mike regarding BERT results.
This is valid information that can be published.

John

-----Original Message-----
From: [e-mail] [mailto:[e-mail]]
Sent: Saturday, May 05, 2001 7:44 AM
To: [e-mail]
Subject: NVEI


Hi John,
I posted this on I-hub board. Does this make sense? Am I understanding this
correctly?


There has been alot of talk lately about BER rate. If I understand our
technology correctly there is no way for them to release a BER rate. Why?
Because the tech is a speed and distance driver of different applications of
technology. Lets take companies abc tech as an example. They see our tech
work. After deciding this is something that would definetly enhance what
they
have then the process begins. Their engineers meet with our engineers and
apply our tech to theirs. At that time after tweaking and testing you'd have
a BER rate. The BER rate would be different according to whos technology you
add ours to. This make sense? Why and how could you would you release a BER
rate? How could you if it was to be different in each application it is
used?
I hope I understand our tech. This is my story and I'm sticking to it until?





Allan Blevins
All telecom systems and many other technologies require a certain BERT or the digital data being transferred from point A to point B becomes corrupted to the point that it is unusable. The number expressed in a BERT specification is the number of bits of error out of a total number of bits transferred. A BERT test requires that a minimum number of digital data bits be transferred over time. BERT specs are typically defined simply as 10 to a minus power.

For example, DS1 or T1 telephone connections should be able to deliver data at a rate of no less than 10E-7 (ten to the minus 7). A typical test lasts less than 1 hour because testing equipment transfers billions of data bits in that time and measures data errors in real time. If a 1 hour test results in a BERT of 10E-7 than this means that an average of 1 error occurred for every 10 million bits transferred over the span of 1 hour. If the result was 10E-8 than an average of 1 error occurred for every 100 million bits transferred.

An example of another technology that requires a very low BERT is hard disc and CD technology. BERT values in this industry are typically 10E-12 or better (ten to the minus 12). In this technology, the BERT rate is based on the number of errors of data written then read from a disc.

A BERT spec always measures the performance of a product as a whole, not a specific technology aspect of the product. In our case, making a claim on the specific performance of the copper wire interface is meaningless. We are making a fiber to 4 wire line driver product. The BERT results are only valid when we measure the performance starting from fiber in, thru the whole system, to fiber out at the other end.

One issue that is probably not obvious about a technology product is that each functional block of the over all system has the potential to make the BERT unacceptable. The system is designed so that no one part creates unacceptable BERT results. Each product must be tested independently, a BERT for one Cu@OCx product does not mean other Cu@OCx <mailto:Cu@OCx> products will have the same bit error rate. The BERT spec for our first CU@)OCx <mailto:CU@)OCx> product, a 4-wire OC1 Line driver, is not an industry standard, but it is being designed it to meet the BERT standard of T-1 or DS-1 lines. 10E-7.


Excel - Greg