Exhibit K Operational Description

FCC ID: AJK8221785

Operational Description

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FCCID_944868

Exhibit K Operational Description NOTICE: The contents of this document are proprietary to Rockwell Collins, Inc. and shall not be disclosed, disseminated, copied, or used except for purposes expressly authorized in writing by Rockwell Collins, Inc. NOTICE: The technical data in this document (or file) is controlled for export under the Export Administration Regulations (EAR), 15 CFR Parts 730-774. Violations of these export laws may be subject to fines and penalties under the Export Administration Act. NOTICE: The following software was used to produce this document: Microsoft Word 2003 SP2 NOTICE: © Copyright 2008 Rockwell Collins, Inc. All rights reserved. Rockwell Collins, Inc. 400 Collins Rd. NE Cedar Rapids, Iowa 52498 CAGEC 4V792 Page 1 of 7

SRT-2100B FCC Type Certification Report – Exhibit – K SRT-2100B Operational Description 1 Exhibit K – Operational Description 1.1 Name and Address (Section 2.1033 (c) (1)) The name and address of the manufacturer of the SRT-2100B Satellite Communications System and applicant for certification is Rockwell Collins, Inc., 1300 Wilson Boulevard, Suite 200, Arlington, Virginia 22209. 1.2 FCC Identifier (Section 2.1033 (c) (2)) FCC ID Description AJK8221785 SATELLITE DATA UNIT (SRT-2100B) 1.3 Installation and Operation Manuals (Section 2.1033 (c) (3)) See Exhibit H. 1.4 Type or Types of Emission (Section 2.1033 (c) (4)) The following table shows the measured bandwidths for each of the data rates supported by the SRT- 2100B. Each measured bandwidth falls within the 25 kHz bandwidth limit specified in Section 87.137(a) for 21K0G1D, 21K0G1E, and 21K0G1W transmission. This data was obtained while transmitting at the maximum output power of 45 watts. Table 1 Emission Types Data Rate Low-Band Mid-Band High-Band (1626.5 MHz) BW (1643.5 MHz) (1660.5 MHz) (BPS) (kHz) BW (kHz) BW (kHz) 600 1.041 kHz 1.014 kHz 1.028 kHz 1200 1.641 kHz 1.664 kHz 1.667 kHz 8400 5.632 kHz 5.579 kHz 5.550 kHz 10500 8.876 kHz 8.990 kHz 8.976 kHz 21000 17.57 kHz 17.43 kHz 17.47 kHz Rockwell Collins, Inc. - Proprietary Information Page 2

SRT-2100B FCC Type Certification Report – Exhibit – K SRT-2100B Operational Description 1.5 Frequency Range (Section 2.1033 (c) (5)) The SRT-2100B transmit frequency range is 1626.5 MHz to 1660.5 MHz the receive frequency range is 1530.0 MHz to 1559.0 MHz. 1.6 Range of Operating Power Values (Section 2.1033 (c) (6)) The SRT-2100B maximum transmitter output power for all transmit channels is 45 Watts / 16.5 dBW / 46.5 dBm. The output power level of each module in the transmit mode is individually controlled. The transmit output power adjustment range of each module is from 0 dB to –15 dB. 1.7 Maximum Power Rating as Defined in Part 87 According to Section 87.131, UHF aircraft earth stations with emission designators G1D, G1E and G1W can have a maximum of 60 watts per carrier. The SRT-2100B provides a maximum output power of 45 Watts in multi-channel mode. 1.8 DC Voltages and Currents (Section 2.1033 (c) (8)) Table 2 DC Voltages and Currents DC Supply Voltage Maximum DC Supply Typical Measured DC Current Supply Current +27 VDC 8.0 Amps 7.35 Amps +15 VDC 1.0 Amps 0.53 Amps -15 VDC 0.2 Amps 0.10 Amps +5 VDC 0.3 Amps 0.12 Amps 1.9 Tune Up Procedures (Section 2.1033 (c) (9)) See Exhibit J. 1.10 Schematics and Circuit Diagrams (Section 2.1033 (c) (10)) See Exhibit E. 1.11 Nameplate Label Drawings (Section 2.1033 (c) (11)) See Exhibit A. Rockwell Collins, Inc. - Proprietary Information Page 3

SRT-2100B FCC Type Certification Report – Exhibit – K SRT-2100B Operational Description 1.12 Equipment Photographs: External Views (Section 2.1033 (c) (12)) See Exhibit C. 1.13 Equipment Photographs: Internal Views (Section 2.1033 (c) (12)) See Exhibit I. 1.14 Digital Modulation System (Section 2.1033 (c) (13)) The following describes the digital modulation techniques utilized in the SRT-2100B for each data rate per Section 2.1033 (c) (13). 600 BPS A-BPSK with differential encoding Square Root 40% Raised Cosine Filter Input wavetrain formulation: The input binary data stream is first applied to a scrambler with a 15-stage shift register which has a feedback polynomial of 1 + X + X15. The output of the scrambler is then applied to a convolutional encoder. The generator polynomials are: G1: 1 + X2 + X3 + X5 + X6 G2: 1 + X + X2 + X3 + X6 The generated polynomial outputs are combined in a punctuated 1/2 rate before the encoded data stream is applied to an interleaver of block size of 384 bits in 6 columns. The output bit stream of the interleaver is organized into words of 3 blocks of 384 bits each. The 3 blocks of data are preceded by a 4 bit format identifier and a 12 bit superframe counter and is appended with a 32 bit unique word for a total word length of 1200 bits. Four (4) words are subsequently organized into a superframe before it is applied to the modulator. The binary phase shift keying (BPSK) modulator phase shifts a subcarrier by -90 or +90 degrees depending on the input word data bit being a 0 or 1, respectively. The subcarrier signal now contains the information and is upconverted for transmission. Rockwell Collins, Inc. - Proprietary Information Page 4

SRT-2100B FCC Type Certification Report – Exhibit – K SRT-2100B Operational Description 1200 BPS A-BPSK with differential encoding Square Root 40% Raised Cosine Filter Input wavetrain formulation: The input binary data stream is first applied to a scrambler with a 15-stage shift register which has a feedback polynomial of 1 + X + X15. The output of the scrambler is then applied to a convolutional encoder. The generator polynomials are: G1: 1 + X2 + X3 + X5 + X6 G2: 1 + X + X2 + X3 + X6 The generated polynomial outputs are combined in a punctuated 1/2 rate before the encoded data stream is applied to an interleaver of block size of 576 bits in 9 columns. The output bit stream of the interleaver is organized into words of 2 blocks of 576 bits each. The 2 blocks of data are preceded by a 4 bit format identifier and a 12 bit superframe counter and is appended with a 32 bit unique word for a total word length of 1200 bits. Eight (8) words are subsequently organized into a superframe before it is applied to the modulator. The binary phase shift keying (BPSK) modulator phase shifts a subcarrier signal by -90 or +90 degrees depending on the input word data bit being a 0 or 1, respectively. The subcarrier signal now contains the information and is upconverted for transmission. 8400 BPS Aviation Quadrature Phase Shift Keying (A-QPSK) Square Root 60% Raised Cosine Filter Input wavetrain formulation: The input binary data stream is first applied to a scrambler with a 15-stage shift register which has a feedback polynomial of 1 + X + X15. The output of the scrambler is then applied to a convolutional encoder. The generator polynomials are: G1: 1 + X2 + X3 + X5 + X6 G2: 1 + X + X2 + X3 + X6 The generated polynomial outputs are combined in a punctuated 2/3 rate before the encoded data stream is applied to an interleaver of block size of 256 bits in 4 columns. The bit stream of the output of the interleaver is organized into words of 16 blocks of 256 bits each. The 16 blocks of data are preceded by a 104 bit long unique word for a total word length of 4200 bits. The quadrature phase shift keying (QPSK) modulator phase shifts a subcarrier signal by 45, 135, -135, or -45 degrees depending on the state of each 2-bits of the input. The subcarrier signal now contains the information and is upconverted for transmission. Rockwell Collins, Inc. - Proprietary Information Page 5

SRT-2100B FCC Type Certification Report – Exhibit – K SRT-2100B Operational Description 10500 BPS Aviation Quadrature Phase Shift Keying (A-QPSK) with differential encoding Square Root 100% Raised Cosine Filter Input wavetrain formulation: The input binary data stream is first applied to a scrambler with a 15-stage shift register which has a feedback polynomial of 1 + X + X15. The output of the scrambler is then applied to a convolutional encoder. The generator polynomials are: G1: 1 + X2 + X3 + X5 + X6 G2: 1 + X + X2 + X3 + X6 The generated polynomial outputs are combined in a punctuated 1/2 rate before the encoded data stream is applied to an interleaver of block size of 4992 bits in 78 columns. The output bit stream of the interleaver is organized into a single block. The block of data is preceded by a 4 bit format identifier, a 12 bit superframe counter, and 178 dummy bits and is appended with a 64 bit unique word for a total word length of 1200 bits. Sixteen (16) words are subsequently organized into a superframe before it is applied to the modulator. The quadrature phase shift keying (QPSK) modulator phase shifts a subcarrier signal by 45, 135, -135, or -45 degrees depending on the state of each 2-bits of the input. The subcarrier signal now contains the information and is upconverted for transmission. 21000 BPS Aviation Quadrature Phase Shift Keying (A-QPSK) with coherent filtering Square Root 100% Raised Cosine Filter Input wavetrain formulation: The input binary data stream is first applied to a scrambler with a 15-stage shift register which has a feedback polynomial of 1 + X + X15. The output of the scrambler is then applied to a convolutional encoder. The generator polynomials are: G1: 1 + X2 + X3 + X5 + X6 G2: 1 + X + X2 + X3 + X6 The generated polynomial outputs are combined in a punctuated 1/2 rate before the encoded data stream is applied to an interleaver of block size of 384 bits in 6 columns. The bit stream of the output of the interleaver is organized into words of 27 blocks of 384 bits each. The 27 blocks of data are preceded by an 840 bit preamble, an 88 bit long unique word, and 44 dummy bits for a total word length of 11,340 bits. The quadrature phase shift keying (QPSK) modulator phase shifts a subcarrier signal by 45, 135, -135, or -45 degrees depending on the state of each 2-bits of the input. The subcarrier signal now contains the information and is upconverted for transmission. Rockwell Collins, Inc. - Proprietary Information Page 6

SRT-2100B FCC Type Certification Report – Exhibit – K SRT-2100B Operational Description Table 3 Symbol Rates and Modulation Types Bit Rate Symbol Rate Modulation Type 600 600 A-BPSK 1200 1200 A-BPSK 8400 4200 A-QPSK 10500 5250 A-QPSK 21000 10500 A-QPSK 1.15 Required Measurements (Section 2.1033 (c) (14)) See Exhibit F. Rockwell Collins, Inc. - Proprietary Information Page 7


Document Created: 2008-05-20 08:23:54
Document Modified: 2008-05-20 08:23:54
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