Attachment Inmar_term_request

This document pretains to SAT-MOD-20031118-00333 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2003111800333_378659

Federal Communications Commission Washington, DC 20554 International Bureau June 25,2004 Mr. Alan Auckenthaler, Vice President Inmarsat Inc. 1100 Wilson Blvd., Ste. 1425 Arlington, VA 22209-3903 Re: In the Matter of Flexibility for Delivery of Communication by Mobile Satellite Service Providers in the 2 GHz Band, the L-Band, and the 1.6/2.4 GHz Bands, IB Docket No. 01-185 Dear Mr. Auckenthaler: As you are aware, Inmarsat Ventures Ltd. (“Inmarsat”) and Mobile Satellite Ventures Subsidiary LLC (“MSV”) have differing views regarding the level of an interfering signal from an MSV proposed Ancillary Terrestrial Component (“ATC”) base station that will result in an input signal overload condition to an Inmarsat terminal receiver operating in the 1525.0-1559.0 MHz band. The difference in Inmarsat receiver overload levels claimed by Inmarsat and MSV is on the order of 30 dB. MSV claims the Inmarsat receiver overload threshold used for interference analysis should be -45 dBm at the input to the Inmarsat receiver low-noise amplifier (“LNA”).’ Inmarsat claims the overload threshold is on the order of -75 dBm.2 In the ATC Order,3 the Commission calculated the necessary separation distance between MSV’s ATC base stations and Inmarsat terminals on aircraft and vessels and associated ATC base station effective ’See In the Matter of Mobile Satellite Ventures Subsidiary LLC Application for Modification of Space Station License (AMSC-I), File No. SAT-MOD-20031 118-00333, Amendment to Pending Application to Launch and Operate a Next-Generation Replacement MSS Satellite System, File No. SAT-A MD-2003 I I 18- 00332, and Application for a Modijkation of Blanket License to Operate Mobile Earth Terminals with MSAT-I, File No. SES-MOD-20031118-01879, Response of Mobile Satellite Ventures Subsidiary LLC to Opposition of Inmarsat Ventures LLC (April 14,2004) (Appendix A at p. 5) 2 See In the Matter of Mobile Satellite Ventures Subsidiary LLC Application for Modijkation of Space Station License (AMSC- I), File No. SAT-MOD-20031 118-00333, Amendment to Pending Application to Launch and Operate a Next-Generation Replacement MSS Satellite System, File No. SAT-AMD-2003 I I 18- 00332, and Application for a Modijkation of Blanket License to Operate Mobile Earth Terminals with MSAT-I, File No. SES-MOD-20031118-01879, Reply of Inmarsat Ventures Ltd (April 26,2004) (p. 40). See In the Matter of Flexibility for Delivery of Communications by Mobile Satellite Service Providers in the 2 GHz band, the L-Band, and the 1.6/2.4 GHz Bands; Review of the Spectrum Sharing Plan Among Non-Geostationary Satellite Orbit Mobile Satellite Service Systems in the 1.6/2.4 GHz Bandy, Report and Order and Notice of Proposed Rulemaking, 1B Docket No. 01-185 and IB Docket No. 02-364 (rel. Feb. 10, 2003) (the “ATC Order ’7.

EIRP limits based on assumed overload thresholds at the LNA input of -50 dBm for airborne terminals and -60 dBm for mass-produced terrestrial receiver^.^ Due to the 30 dB discrepancy between MSV’s and Inmarsat’s overload threshold values, we believe that we must make independent measurements of the overload thresholds of a variety of Inmarsat terminal receivers to determine the most appropriate level (or levels) to use in any revisions to the Commission’s calculations of the necessary separation distances between ATC base stations and Inmarsat terminals and the EIRP limits on ATC base station transmissions. To properly characterize Inmarsat terminal receiver overload characteristics, we propose to perform Eb/No versus BER and sync loss measurements on Inmarsat receivers, over a range of Inmarsat downlink carrier power levels, with simulated GSM, cdma2000, and W-CDMA interfering signals at various power levels and frequency offsets? We have verbally presented this proposal to representatives of both Inmarsat and MSV, and received verbal agreements from representatives of both companies to cooperate and supply Inmarsat terminals for testing. This letter is to formally request that Inmarsat supply the Commission with a representative sample of Inmarsat airborne and terrestrial terminals (on the order of six to eight terminals, total) for receiver overload testing purposes. In addition, we request that Inmarsat supply the Commission with the documentation necessary to determine the best way to conduct the tests outlined in the previous paragraph and with the test signal generator(s) required to provide simulated Inmarsat downlink signals appropriate for those tests. At the conclusion of the Commission’s tests, we will return the terminals and test equipment to Inmarsat. Technical assistance from representatives of Inmarsat and the manufacturers of Inmarsat terminals in generating the Commission’s test plans and procedures would also be welcome. The FCC representatives for the Inmarsat terminal receiver testing will be Chip Fleming of the International Bureau, Satellite Division, Satellite Engineering Branch, at (202) 41 8-1247, email chig.fleminn~~~fcc.nov, and Bill Hurst, Office of Engineering and Technology, Laboratory Division, at (301) 362-303 1, email willia.t7l.hurst(~~fc.niov. Please designate an Inmarsat representative to work with Messrs. Fleming and Hurst on the logistical and technical matters associated with the receiver testing. Id (Appendix C2, 9 1.12) 5 MSV proposes to use GSM, cdma2000, or W-CDMA, or a combination of these in its ATC system. See In the Matter of Mobile Satellite Ventures Subsidiary LLC Application for Modijkation of Space Station License (AMSC-I), File No. SAT-MOD-20031 I 18-00333, Amendment to Pending Application to Launch and Operate a Next-Generation Replacement MSS Satellite System, File No. SAT-AMD-20031 I 18-00332, and Application for a Modijkation of Blanket License to Operate Mobile Earth Terminals with MSAT-I, File No. SES-MOD-20031 I 18-01879, Application for Minor Modification and Amendment of Mobile Satellite Ventures Subsidiary LLC (Nov. 18,2003) (p. 7 and Appendix B).

Attached are instructions for shipping the Inmarsat terminals to the Commission’s Laboratory in Columbia, Maryland. Sincerely, F w p V Fern J. Jarmulnek Deputy Chief, Satellite Division cc: JohnP. Janka Alexander Hoehn-Saric Counsel to Inmarsat Latham & Watkins LLP 555 1lth St, NW, Ste. 1000 Washington, DC 20004- 1304 Jonas Eneberg j onas eneb erg(2jin inarsat .com Attachment

EQUIPMENT SHIPPING INSTRUCTIONS Equipment may be hand-delivered to the FCC Laboratory with prior approval. - A. LABELING OF SAMPLES - If a test sample cannot be associated with an application or a sample request letter, it may be returned for insufficient identification. ALL samples and accessories submitted for test should have identification tags listing the items below: Name, address, and telephone number of company supplying the equipment Name, address, and telephone number of person to contact should sample malfunction during test, or if it is necessary to return sample for repair. - B. SHIPPING ADDRESS (UPS, COURIER SERVICE, FREIGHT, OR AIR) Federal Communications Commission 7435 Oakland Mills Road Gate A Columbia, Maryland 2 1046 Attention: Bill Hurst Telephone: (301) 362-3000 - C. ALL TEST SAMPLES SHOULD BE ACCOMPANIED BY A COPY OF THE SAMPLE REQUEST LETTER AND RETURN SHIPMENT AUTHORIZATION FORM (see next page). - D. SPECIAL NOTE TO FOREIGN PARTIES - Foreign parties with American subsidiaries or agents should ship equipment to them for forwarding to the Laboratory. If no American subsidiary is available, arrangements must be made for clearance of shipment through U. S. Customs, delivery to the Laboratory, and return shipment to the applicant. The Commission will not make delivery arrangements, or pay any related charges associated with foreign shipments. - E. If you require notification that your equipment has been received at the Laboratory, please contact your shipper for delivery date.

RE'I" SHIPMENT AUTHORIZATION ! This completed form, along with a copy opthe sample request letter md return shipping labels, must accompany all equipment, Psilure to follow these instructions will delay testing of your equipment, All equipment and accessories,if any, must listed and properly labeled. t j: I T n e of Eauibmeat I i' Model/Tvae Number I Serial Number I I I I I I I. t b I I ATTACH ADQITI0NA.L SHEET, IF NECESSARY I I 9 1 Printed Name of Responsible Person , Printed Email Address of Responsible Person Name of Company - Telephone no. (Include area code USA ONLY) rlPlease check here if equipment is not I I to be returned. If equipment is to be returned, please complete the following: "Preferredcarrier for return shipment: . I Name of company and your account numb& *If no prefefied carrier is lbted, equipment billbe returned COLLECT by fieight. UPS customeq: If equipment is to be re-d via UPS, you must have call tags issued to the Laboratory within two weeks from the date you are nobfied. Otherwise,the equipment will be returned freight COLLECT. I


Document Created: 2004-06-25 12:16:32
Document Modified: 2004-06-25 12:16:32
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