BV8MBS800A075

Proprietary Notice (on Front Cover of User Manual) The information contained in this document or item is the property of M/A-COM, Inc. and/or its subsidiaries and shall be kept in strict confidence. Except with the written permission of M/A-COM, Inc. such information or item shall not be published, or disclosed to third parties, or used for manufacture or sale or for any other purpose, and this document or item shall not be reproduced in any form by any means in whole or in part. If permission is granted for reproduction, this legend shall be included in any such reproduction. This document or end item shall be returned to M/A-COM, Inc. Upon request, or completion of the use for which it was made available to recipient, or termination of the relationship with recipient, whichever comes first. Any recipient so agrees by acceptance of this document or item. The data subject to this restriction are contained in all sheets. Copyright 1999, M/A-COM, Inc. All rights reserved under the copyright law of the United States and Canada and other laws.

Chomerics Test Services 77 Dragon Court Woburn, Massachusetts 01888-4104 781-939-4158 Fax: 781-935-2758 E-mail: [email protected] August 12, 1999 TO:Federal Communications Commission Washington, DC 20554 Reference:M/A-COM=s OpenSky TM Base Station M/A-COM, a division of AMP Incorporated, is requesting that certain sections, exhibits and the like, to the attached submission be treated by the FCC as confidential information. The section that required confidentiality is for the most part all of the Section entitled Block Diagrams and Schematics and includes the following technical information: Description of Circuitry to Prevent Spurious Radiation: 2 Pages, Section 5B of File BSC-1010 Base Station Controller Processor Board: 47 Pages, Section X of File Drawing Number CTC-000056 BSX-802 Base Station Transceiver Processor Board: 33 Pages, Section X of File Drawing Number CTC-000124 BSX-802 Base Station Transceiver Board: 15 Pages, Section X of File Drawing Number CTC- 00015 BSX-802 Base Station Transceiver High Performance Synthesizer Board: 7 Pages, Section X of File Drawing Number CTC-000561 BSX-802 Base Station Transceiver Preselector/Reference Board: 5 Pages, Section X of File Drawing Number CTC-000593 and HF00367 HPA-875 Base Station High Performance Amplifier: 2 Pages, Section X of File Drawing Number HE00356 OpenSky Digital Base Station Manual: 10 Initial Pages (not page numbered), 43 Pages (page numbered 3 to 46 to end), Section XI of File Chomerics Test Services 77 Dragon Court Woburn, Massachusetts 01888-4104 781-939-4158 Fax: 781-935-2758 E-mail: [email protected] The above aforementioned technical information which is explicitly characterized in the certification submittal, describes in detail how M/A-COM=s product is built and its theory of operation. This level of technical information, if disclosed outside of the FCC, would cause irreparable harm to M/A-COM from a competitive standpoint. Therefore, M/A-COM respectfully requests that the technical information listed herein and fully described in our submission attached hereto be treated as confidential information and not be disclosed outside of the FCC. Sincerely, Patricia L. Terilli CTS Coordinator