STA Summary Exhibit

0986-EX-ST-2016 Text Documents

Raytheon IDS

2016-06-30ELS_178953

Raytheon Request for FCC Special Temporary Authorization (STA) STA File Number: 0986-EX-ST-2016 Date: 6/29/2016 Purpose of Operation: Frequency authorization is being requested for the period of August 1, 2016 – January 23, 2017 in X-band at frequencies between 9.55 – 9.65 GHz, in order to test prototype radar arrays in a relevant environment. Outdoor testing, across multiple frequencies as noted above is required to assess hardware compliance with requirements and to continue research and development. Up to two units will be tested over this range simultaneously. Technical Synopsis: • Spectrum needed: 9.55 – 9.65 GHz • Power levels requested: 160 W output power, 953.4 kW ERP (peak) • Location of use: Raytheon Test Facility in Marlborough, MA • Direction of radiation: o Antenna 1: North West (nominally boresite 343º) o Antenna 2: North East (nominally boresite 73º) o Each antenna has a +/- 45 degree scan angle • Stop buzzer contacts: Robert Palumbo (978-376-7321), Nate Miller (507-421-9830), and Rene Messier (774-696-3634) STA Explanation: The purpose of this request for Special Temporary Authorization is to test array compliance to RF performance requirements in a relevant environment. Radar development testing is planned at the Raytheon facility in Marlborough, MA. Test Summary: The system will transmit pulsed Frequency Modulated (Chirp) waveforms. For all waveform types, the maximum pulse duration is 55µs and the maximum duty factor is 22%. It is expected that the radars will be operated periodically during the STA period, < 8 hours a day, up to 7 days a week, for the duration of the STA. RF Hazard Calculations and Site Safety Measures: Initial calculations show that general public exposure limits will be reached at a 2.25 meters distance and occupational exposure limits at 1.0 meter, using formula (7) from FCC OET Bulletin 65 “Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields”, dated August 1997. These calculations take into account the highest duty factor of 22% and the raster scan pattern utilized by the radar. Raytheon’s RF safety group is involved in all testing that requires free space radiation to ensure that no personnel are subjected to RF power density levels exceeding the Maximum Permissible Exposure (MPE) limits of the Part 1.1310 of the FCC Rules and the guidelines in FCC’s OET Bulletin Number 65. An RF Safety Control Plan will be in place for the tests. The Plan will define the procedures and controls required to prevent personnel exposure to levels which exceed 1

the MPE. To verify the safety of personnel, an RF survey will be performed at the initial turn-on of the system. All measured levels, where personnel have access, must be below the MPE limits before testing can proceed. Raytheon Technical Point of Contact: Robert A. Palumbo System Engineering I&T Lead Phone: 978-376-7321 (cell phone) Email: Robert_A_Palumbo@raytheon.com Raytheon Spectrum Manager filing application: Karen Dyberg Spectrum Management/RF Safety Phone: 508-490-2723 (office phone) Email: Karen.Dyberg@raytheon.com Period of Use: Start date: August 1, 2016 End date: January 23, 2017 Equipment Information: Indicate all equipment that will be involved in this operation. Transmitter info: Manufacturer: Raytheon Model: LPR3 Number of units: 6 Experimental (Y/N): Y For each frequency band: RF output at the transmitter terminals: 160 Watts peak Effective radiated power from the antenna (if pulsed emission, specify peak power): The effective radiated power from the antenna, including antenna transmit gain and front-end losses, is 953.4 kW (peak power). EIRP = Power * gain, Power = 160 W, gain = 39.9 dBi, EIRP = 160 * 9772.37 = 15635972 W ERP = EIRP/1.64 = 953402 W or 953.4 kW Frequency Tolerance: Less than 0.001 % List each type of emission separately for each frequency (basically list the emission designators) The LPR3 can tune at 1 MHz intervals within the band(s) authorized. 2

For each tunable frequency authorized, the LPR3 has the following emission designators: 4M7Q3N - 55µsec FM-Pulsed (LP) with a 2 MHz LFM chirp, centered at Ftune – 2 MHz 7M1Q3N - 6µsec FM-Pulsed (SP) with a 2.5 MHz NLFM chirp, centered at Ftune + 2.5 MHz The transmit waveform chain-pulse sequence transmits a Long Pulse (LP) then a Short Pulse (SP) for each pulse repetition interval (PRI). The PRI for a pulse sequence is 256 usec (PRF = 3906.25 Hz). The Long Pulse (LP) is 55 usec pulse length using a 2 MHz linear FM chirp at a 22% duty factor. The Short Pulse (SP) is a 6 usec pulse length using a 2.5 MHz non-linear FM chirp at a 2.3% duty factor. Note: the pulse sequence requires 10.4 MHz (LP necessary bandwidth/2 + SP necessary bandwidth/2 + 4.5 MHz = 4.7/2 MHz + 7.1/2 MHz + 4.5 = 10.4 MHz List as appropriate for the type of modulation: LP: Linear Frequency-Modulated Pulsed (Chirp) SP: Non-Linear Frequency-Modulated Pulsed (Chirp) Necessary bandwidth. Explain how determined. The necessary bandwidth was calculated using the equations in Annex J of the NTIA Manual. Locations: The street address for the Raytheon location is 1001 Boston Post Road, MA 01752. The ground elevation of the facility is 70 meters above sea level. The radars will be located on Raytheon property, either on a trailer on the ground or mounted on a rooftop, within 0.4 km of the following coordinates: 42º 20’ 44” North, 071º 29’ 29” West. Is a directional antenna (other than radar used)? No. If yes, give the following info: (Although not necessary for this application, additional antenna detail is provided below) Width of beam in degrees at the half-power point: 1.98° Azimuth, 2.1° Elevation at boresight Orientation in horizontal plane: +/- 45° Electronically Scanned Orientation in vertical plane: 0° to 30°, relative to ground horizontal, electronically scanned Will the antenna extend more than 6 meters above ground, or if mounted on an existing building, will it extend more than 6 meters above the building, or will the proposed antenna be mounted on an existing structure other than a building? No. Overall height above ground to tip of antenna in meters: No more 3 meters above ground level if installed on a trailer and 14 meters when mounted on the rooftop. 3

Necessary Bandwidth Calculation Table FM-Pulse d Radar Modulation LFM NLFM Pulse Width (µse c) 55 6 Rise Time (µse c) 0.128 0.128 Fall Time (µsec ) 0.128 0.128 Chirp BW (MHz) 2 2.5 Ne ce ssary BW (MHz) 4.7 7.1 De signator 4M7Q3N 7M1Q3N Necessary BW Formula Symbols: t = Emitted pulse duration at 50% amplitude (voltage) points. The 100% amplitude point is the nominal peak level of the pulse. tr = Emitted pulse rise time in µsec from the 10% to the 90% amplitude points on the leading edge. tf = Emitted pulse fall time in µsec from the 90% to the 10% amplitude points on the trailing edge. FM-Pulsed Radar: *If tf is less than tr, then tf is to be used in place of tr when performing the necessary bandwidth calculations. Designators FM-Pulsed Radar Designators (NTIA) Prefix Necessary Bandwidth ##M# Megahertz with M at decimal In which the carrier is angle- Emissions Type of Modulation Main Carrier Q modulated during the period of the pulse (i.e. chirp, FM). A single channel containing Emissions Nature of signals modulating 3 analogue information. Emissions Type of Info transmitted N No Information Transmitted. 4


Document Created: 2016-06-30 17:29:31
Document Modified: 2016-06-30 17:29:31
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