Exhibit 1 ARINC

0011-EX-ST-2001 Text Documents

Aeronautical Radio Inc

2001-01-10ELS_43780

FCC Form 442 Exhibit 1: ARINC Page 1/3 EXHIBIT 1 EQUIPTMENT DESCRIPTION PROGRAM DESCRIPTION ARINC will be operating one fixed mobile satellite pallet equipped with Rockwell Collins satellite avionics at their headquarters in Annapolis, MD. The equipment will be operated for the purpose of: a) Test and demonstrate operation of an INMARSAT aircraft earth station (AES) with a Land Earth Station (LES), the ARINC Packet Network (APN) and ARINC Corporate LAN for voice and data applications. The equipment shall operate in the Marine and Aeronautical positions of the Mobile Satellite spectrum. Demonstration of the operational capability of this equipment requires transmitting. No “FOR HIRE” communications are to be provided during the use of this equipment. DIGITAL VOICE AND DATA The equipment shall transmit one channel of digital voice or data using 8.4 kbps A-QPSK modulation. The system shall use an intermediate gain stationary antenna. In addition, low speed data will be transmitted using an A-BPSK modulation. All modulation complies with ICAO/aviation standards. Ground earth station communication services shall be provided by Comsat Mobile Communication (CMC). OPERATING DETAILS The mobile satellite bands comprising 1626.5 to 1660.5 MHz will be used. Specific frequencies and operating schedules will be coordinated with Inmarsat, in cooperation with CMC. RF Power Output The maximum RF power output of the equipment will be 25 Watts per carrier (14 dBW peak). Antenna Gain An intermediate gain antenna shall be used to provide a gain 6 dBic (nominal) and half power beam width of 60 degrees. EIRP The maximum equivalent isotropic radiated power (EIRP) shall be 23 dBW (peak).

Emission Types Emission Modulation Symbol Convolutionally Type Type Rate Encoded Rate 840HG1D A-BPSK 600 baud 600 bps ½ FEC 1K68G1D A-BPSK 1200 baud 1200 bps ½ FEC 6K72G1W A-QPSK 4.2 kbaud 8400 bps 2/3 FEC Modulation Methods Type Description A-QPSK Aviation Quadrature Phase Shift Keying uses a specific form of Offset QPSK where the modulation filtering is optimized for satellite communications with aviation applications (Reference: “Quaternary Transmission Over Satellite Channels with Cascaded Non-Linear Elements and Adjacent Interference” by Russel Fang in IEEE Transactions on Communications, May 1981, Vol. COM-29, No. 5, pp 567-581.) A-BPSK Aviation Binary Phase Shift Keying uses a specific form of differentially encoded BPSK where in-phase and quadrature channels are used to transmit alternate symbols. (Referenced: “Differential Detection With Intersymbol Interference and Frequency Uncertainty” by J.H. Wintore in IEEE Transactions on Communications, January 1984, Vol. Comm-32, No. 1, pp. 25-33.) Necessary Bandwidth Radiated bandwidth from the equipment is controlled by the use of raised cosine filters in the transmitter. The A-QPSK are signals subjected to either a 60% or 100% raised cosine filter. The associated necessary bandwidth calculation is: BW=1/T(1+r)

Where 1/T is the symbol transmission rate in symbols per second and r is the roll-off factor. Symbol Rate Modulation Type Rolloff Bandwidth (Baud) (r) (BW) 600 A-BPSK 0.4 0.840 kHz 1200 A-BPSK 0.4 1.680 kHz 4200 A-QPSK .6 6.720 kHz


Document Created: 2001-01-10 14:28:00
Document Modified: 2001-01-10 14:28:00
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