EMS STA Request Doc

0361-EX-ST-2003 Text Documents

EMS Technologies

2003-09-29ELS_63099

Electronic Filing September 26, 2003 FEDERAL COMMUNICATIONS COMMISSION Experimental Radio Service P.O. Box 358320 Pittsburgh, PA 15251-5320 Dear Sir or Madam: This letter is to request an Special Temporary Authority (STA) to operate transmitters in certain selected bands between 11.7 GHz to 12.2 GHz, and 14.0 to 14.5 at locations in the continental United States as described below. In accordance with 47 CFR chapter 1, (10-1-00 edition), section 5.61, the attached Exhibit A – System Description is being provided to support the application. EMS Technologies has developed a DVB-RCS platform and is using it for satellite 2-way broadband access demonstrations to customers. IN order to provide comprehensive service demonstrations EMS would like to provide the service using 1.8 meter VSAT terminals located throughout CONUS. The time frame for this st st STA request is for an October 1 , 2003 start time running through January 1 , 2004. During this time frame EMS would like to file for an Experimental/Development Authorization to allow for a longer period to conduct these demonstrations. Comsearch, on behalf of EMS Technologies, respectfully requests the FCC to expedite the approval of this STA request. If you have any questions please call. Also included in this document are Exhibit B – Earth Station Site and Coordination Data, Exhibit C – Radiation Hazard Analysis, and Exhibit D – Equipment Data Sheets. Sincerely, COMSEARCH Kenneth G. Ryan Director, Spectrum Management Services (703) 726-5685 kryan@comsearch.com 1

Exhibit A– System Description A.1 - Name, address, phone number of the applicant. EMS Technologies 21025 Trans Canada Highway Ste-Anne-De-Bellevue, Quebec Canada, H9X 3R2 Contact: Myron Oleskewycz Manager Commercial Programs & Customer Service EMS Technologies Canada Ltd. Tel: (514) 457-2150 ext. 3225 Fax: (514) 425-3015 Email: oleskewycz.m@ems-t.ca A.2 - Description of why a Special Temporary Authority (STA) is needed. EMS Technologies has developed a DVB-RCS platform and is providing demonstrations using a satellite earth station hub Montreal, Canada, into remote terminal sites located at potential customer sites within the continental United States. EMS would like to deploy up to ten identical terminals which would be used, for a limited time, for a satellite 2-way broadband access demonstration to customers. The reason for the STA request is to perform outdoor demonstrations between the hub location in Montreal, Canada and selected CONUS terminals. It is anticipated that these demonstrations will required an STA for at least three (3) months time frame. EMS will be seeking a more permanent Experimental Authorization during the STA time period. A.3 Description of the operation to be conducted and its purpose EMS will perform real-time satellite link testing of their DVB equipment using a hub earth station located in Montreal, Canada and up to ten US based transmit-receive VSATs, located at various locations in CONUS. Initially it is anticipated that the remote terminals will communicate with either SES AMC 6 satellite at 72 West Longitude or Panamsat Galaxy 10R at 123 West Longitude. It is requested that the STA be granted for operation with all permitted space stations between 72 and 123 W.L. 1

The points of contact for each transmitting site are as follows: Myron Oleskewycz Manager Commercial Programs & Customer Service EMS Technologies Canada Ltd. Tel: (514) 457-2150 ext. 3225 Fax: (514) 425-3015 Email: oleskewycz.m@ems-t.ca A.4 Time and dates of proposed operation. There will be demonstration sessions, from the remote CONUS locations. It is anticipated that tests will be run during business hours and on weekends during daylight, beginning around October 1 st, 2003, and extending until about January 1 st, 2003. A.5 Class of station The transmitters, at all CONUS locations, will be identical and will be fixed all of the time. A.6 Description of the location and, if applicable, geographic coordinates of the proposed operation. All transmitting signals will originate from Ku-band VSAT terminals located on rooftops or at secure ground locations within the continental United States. A.7 Equipment to be used, including name of manufacturer, model and number of units. The VSATs will use a Channel Master 1.8 meter antenna, model # 180 TX, and 4 watt RFT transmitting at 3.6 watts. The 1.2 meter antenna gain is 46.8 dBi at 14.25 GHz, the maximum EIRP out of any transmitting locations is 52.3 dBW. All remote sites will have the same VSAT configurations. A.8 Frequencies Desired The tests will be performed in the US domestic FSS Ku-band. Transmissions will be between 14,000 and 14,500 MHz and reception will be between 11,700 and 12,200 MHz. 2

A.9 Maximum effective radiated power (ERP) or equivalent isotropically radiated power (EIRP) The transmit earth stations are Channel Master 1.8 meter earth stations (Model 180 TX), with a gain of 46.8 dBi (at 14.25 GHz). The high powered amplifier is rated for 4 watts maximum. The maximum total EIRP at the feed flange of the earth stations will be 52.3 dBW, or a total RF power of 3.6 Watts. The uplink RF power density is within Part 25.212 requirement of –14 dBW/4kHz. The antenna complies with the FCC 2-degree satellite spacing antenna performance requirement of Part 25.209. A.10 Emission designator and description of emission (bandwidth, modulation, etc.) The VSAT return link transmission is digital data at 210 ksps in an allocated bandwidth of 360 kHz. The received emission is a digital DVB signal at 7373 kbps in an allocated bandwidth of 11 MHz. A.11 Overall height of antenna structure above the ground It is anticipated that some of the transmitters will be roof mounted no higher than 6’ above roof top level. 3

EXHIBIT B SATELLITE EARTH STATION FREQUENCY COORDINATION DATA 09/26/2003 Company EMS TECHNOLOGIES Earth Station Name, State CONUS, VA Latitude (DMS) (NAD83) N/A Longitude (DMS) (NAD83) N/A Ground Elevation AMSL (Ft/m) / Antenna Centerline AGL (Ft/m) 6.00 / 1.83 Receive Antenna Type: Channel Master 180 TX 32-25LOG(THETA) 12.0 GHz Gain (dBi) / Diameter (m) 45.3 / 1.8 3 dB / 15 dB Half Beamwidth 0.50 / 1.00 Transmit Antenna Type: Channel Master 180 TX 32-25LOG(THETA) 14.0 GHz Gain (dBi) / Diameter (m) 46.8 / 1.8 3 dB / 15 dB Half Beamwidth 0.40 / 0.85 Operating Mode TRANSMIT AND RECEIVE Modulation DIGITAL Emission / Receive Band (MHz) 11M0G7D / 11700.0000 - 12200.0000 Emission / Transmit Band (MHz) 360KG7D / 14000.0000 - 14500.0000 Max. Available RF Power (dBW)/4 kHz) -14.00 (dBW)/MHz) 10.00 Max. EIRP (dBW)/4 kHz) 32.80 (dBW)/MHz) 56.30 (dBW) 52.30 Max permissible Interference Power 12.0 GHz, 20% (dBW/1 MHz) -156.0 12.0 GHz, 0.0100% (dBW/1 MHz) -146.0 14.0 GHz, 20% (dBW/4 kHz) -151.0 14.0 GHz, 0.0025% (dBW/4 kHz) -128.0 Range of Satellite Arc (Geostationary) Degrees Longitude 72.0 W / 123.0 W Azimuth Range (Min/Max) N/A Corresponding Elevation Angles N/A (5 deg. Min) 1

Exhibit C – Radiation Hazard Study Analysis of Non-Ionizing Radiation for a 1.8-Meter Earth Station System This report analyzes the non-ionizing radiation levels for a 1.8-meter earth station system. The analysis and calculations performed in this report comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97-01. The radiation safety limits used in the analysis are in conformance with the FCC R&O 96-326. Bulletin No. 65 and the FCC R&O specifies that there are two separate tiers of exposure limits that are dependant on the situation in which the exposure takes place and/or the status of the individuals who are subject to the exposure. The Maximum Permissible Exposure (MPE) limits for persons in a General Population/Uncontrolled environment are shown in Table 1. The General Population/Uncontrolled MPE is a function of transmit frequency and is for an exposure period of thirty minutes or less. The MPE limits for persons in an Occupational/Controlled environment are shown in Table 2. The Occupational MPE is a function of transmit frequency and is for an exposure period of six minutes or less. The purpose of the analysis described in this report is to determine the power flux density levels of the earth station in the far-field, near-field, transition region, between the subreflector or feed and main reflector surface, at the main reflector surface, and between the antenna edge and the ground and to compare these levels to the specified MPEs. Table 1. Limits for General Population/Uncontrolled Exposure (MPE) Frequency Range (MHz) Power Density (mW/cm2 ) 30-300 0.2 300-1500 Frequency (MHz)*(0.8/1200) 1500-100,000 1.0 Table 2. Limits for Occupational/Controlled Exposure (MPE) Frequency Range (MHz) Power Density (mW/cm2 ) 30-300 1.0 300-1500 Frequency (MHz)*(4.0/1200) 1500-100,000 5.0 Table 3. Formulas and Parameters Used for Determining Power Flux Densities Parameter Symbol Formula Value Units Antenna Diameter D Input 1.8 m Antenna Surface Area A surface π D2 / 4 2.54 m2 Feed Flange Diameter D fa Input 10.0 cm Area of Feed Flange A fa π D fa 2 /4 78.54 cm2 Frequency F Input 14250 MHz Wavelength λ 300 / F 0.021053 m Transmit Power P Input 3.60 W Antenna Gain (dBi) Ges Input 46.8 dBi Antenna Gain (factor) G 10Ges/10 47863.0 n/a Pi π Constant 3.1415927 n/a Antenna Efficiency η Gλ2 /(π2 D2 ) 0.66 n/a 1

Far Field Distance Calculation The distance to the beginning of the far field can be determined from the following equation: Distance to the Far Field Region Rff = 0.60 D2 / λ (1) = 92.3 m The maximum main beam power density in the far field can be determined from the following equation: On-Axis Power Density in the Far Field Sff = G P / (4 π Rff 2 ) (2) = 1.608 W/m2 = 0.161 mW/cm2 Near Field Calculation Power flux density is considered to be at a maximum value throughout the entire length of the defined Near Field region. The region is contained within a cylindrical volume having the same diameter as the antenna. Past the boundary of the Near Field region, the power density from the antenna decreases linearly with respect to increasing distance. The distance to the end of the Near Field can be determined from the following equation: Extent of the Near Field Rnf = D2 / (4 λ) (3) = 38.5 m The maximum power density in the Near Field can be determined from the following equation: Near Field Power Density Snf = 16.0 η P / (π D2 ) (4) = 3.754 W / m2 = 0.375 mW/cm2 Transition Region Calculation The Transition region is located between the Near and Far Field regions. The power density begins to decrease linearly with increasing distance in the Transition region. While the power density decreases inversely with distance in the Transition region, the power density decreases inversely with the square of the distance in the Far Field region. The maximum power density in the Transition region will not exceed that calculated for the Near Field region. The power density calculated in Section 1 is the highest power density the antenna can produce in any of the regions away from the antenna. The power density at a distance Rt can be determined from the following equation: Transition Region Power Density St = Snf Rnf / Rt (5) = 0.375 mW/cm2 2

Region between the Feed Assembly and the Antenna Reflector Transmissions from the feed assembly are directed toward the antenna reflector surface, and are confined within a conical shape defined by the type of feed assembly. The most common feed assemblies are waveguide flanges, horns or subreflectors. The energy between the feed assembly and reflector surface can be calculated by determining the power density at the feed assembly surface. This can be determined from the following equation: Power Density at the Feed Flange Sfa = 4000 P / A fa (6) = 183.346 mW/cm2 Main Reflector Region The power density in the main reflector is determined in the same manner as the power density at the feed assembly. The area is now the area of the reflector aperture and can be determined from the following equation: Power Density at the Reflector Surface Ssurface = 4 P / A surface (7) = 5.659 W/m2 = 0.566 mW/cm2 Region between the Reflector and the Ground Assuming uniform illumination of the reflector surface, the power density between the antenna and the ground can be determined from the following equation: Power Density between Reflector and Ground Sg = P / A surface (8) = 1.415 W/m2 = 0.141 mW/cm2 3

Summary of Calculations Table 4. Summary of Expected Radiation levels for Uncontrolled Environment Calculated Maximum Radiation Power Density Hazard Region Level (mW/cm 2) Assessment 1. Far Field (Rff = 92.3 m) Sff 0.161 Satisfies FCC MPE 2. Near Field (Rnf = 38.5 m) Snf 0.375 Satisfies FCC MPE 3. Transition Region (Rnf < Rt < Rff) St 0.375 Satisfies FCC MPE 4. Between Feed Assembly and Antenna Sfa 183.346 Potential Hazard Reflector 5. Main Reflector Ssurface 0.566 Satisfies FCC MPE 6. Between Reflector and Ground Sg 0.141 Satisfies FCC MPE Table 5. Summary of Expected Radiation levels for Controlled Environment Calculated Maximum Radiation Region Power Density Level (mW/cm2 ) Hazard Assessment 1. Far Field (Rff = 92.3 m) Sff 0.161 Satisfies FCC MPE 2. Near Field (Rnf = 38.5 m) Snf 0.375 Satisfies FCC MPE 3. Transition Region (Rnf < Rt < Rff) St 0.375 Satisfies FCC MPE 4. Between Feed Assembly and Antenna Sfa 183.346 Potential Hazard Reflector 5. Main Reflector Ssurface 0.566 Satisfies FCC MPE 6. Between Reflector and Ground Sg 0.141 Satisfies FCC MPE It is the applicant's responsibility to ensure that the public and operational personnel are not exposed to harmful levels of radiation. Conclusions Based on the above analysis it is concluded that harmful levels of radiation will not exist in regions normally occupied by the public or the earth station's operating personnel. The transmitter will be turned off during antenna maintenance so that the FCC MPE of 5.0 mW/cm2 will be complied with for those regions with close proximity to the reflector that exceed acceptable levels. 4

Exhibit D - Equipment Data Sheets 5

PRELIMINARY SPECIFICATION 4-watt BLOCK UP CONVERTER 1.0 Scope This document describes the specifications of a phase locked Ku Band Four Watt Block Up Converter 2.0 Electrical Specifications 2.1 Input Frequency 950 to 1450 MHz 2.2 Input Connector Type “N” Female 2.3 Input Return Loss -10 dB Maximum 2.4 Reference Frequency 10 MHz Via Input Connector 2.5 Reference Level 0 +/- 10 dBm 2.6 L.O. Phase Noise -60 dBc @ 100 Hz offset @ 13.05 GHz -70 dBc @ 1 KHz offset -80 dBc @ 10 KHz offset -90 dBc @ 100 KHz offset 2.7 Noise Figure 10 dB Maximum 2.8 Gain 51 dB Nominal 2.9 Gain Stability over Temperature +/-2.0 dB Maximum 2.10 1 dB Compression Point +36 dBm Minimum over Temp. and Freq. 2.11 Two Tone Intermod Products with two +30 dBm signals at the output -22 dBc Maximum 2.12 Output Frequency 14.0 to 14.5 GHz 2.13 Undesired Sideband 11.6 to 12.1 GHz -70 dBc Maximum 2.14 Spurious -50 dBc Maximum 2.15 Harmonics -25 dBc Maximum 2.16 Broadband Noise (10.95 to 12.75 GHz) -150 dBm/Hz Maximum 2.17 Output Connector WR-75 Internally Sealed 2.18 Output Return Loss -10 dB Maximum 2.19 Output VSWR Protection Protected into 3:1 Loads at all Phase Angles 2.20 Power Requirement +24 VDC @ 50 W Typical Via Input Connector 3.0 Other Specifications 3.1 Size 4.5 Diameter X 9.5 Long Inches Approximately 3.2 Weight 3.6 Pounds Approximately 3.2 Temperature Range -40 to +50 Degrees C. Channel Master LLC, 1315 Industrial Park Drive, Smithfield, North Carolina 27577 U.S.A. Telephone: (919) 989-2286 ♦ Facsimile: (919) 989-2200 ♦ e-mail: gjusaites@cmnc.com


Document Created: 2003-09-26 16:01:41
Document Modified: 2003-09-26 16:01:41
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