Dexcom, Inc.

2015-EX-ST-2019

Status: Pending

N/A
2019-10-25

Documents and Communications: [refresh]

DescriptionCategoryDate
MODULATING SIGNAL DESCRIPTIONText Documents2019-10-25
MODULATING SIGNAL DESCRIPTIONText Documents2019-10-25
MODULATING SIGNAL DESCRIPTIONText Documents2019-10-25
MODULATING SIGNAL DESCRIPTIONText Documents2019-10-25
MODULATING SIGNAL DESCRIPTIONText Documents2019-10-29
Application Form:
OET Special Temporary Authority Report
FEDERAL COMMUNICATIONS COMMISSION
APPLICATION FOR SPECIAL TEMPORARY AUTHORITY

Applicant Name
Name of Applicant:  Dexcom, Inc.

Address
Attention: Jacob Nardone
Street Address: 6310 Sequence Drive
P.O. Box:
City: San Diego
State: CA
Zip Code: 92121
Country:
E-Mail Address: [email protected]

Best Contact
Give the following information of person who can best handle inquiries pertaining to this application:  
Last Name: Nardone
First Name: Jacob
Title: Staff Regulatory Affairs Specialist
Phone Number: 8582036337

Explanation
Please explain in the area below why an STA is necessary:
Dexcom, Inc. is seeking this Special Temporary Authority from the FCC for use of a medical device transmitter in a clinical investigation. This clinical investigation will be conducted under FDA’s Investigational Device Exemption requirements (21 CFR 812) and will have an approved Institutional Review Board study protocol. The clinical study will collect sensor signals from an experimental continuous glucose monitoring (CGM) system which is being developed to help detect episodes of hypo/hyperglycemia for the management of diabetes. The component of the experimental CGM system which requires this Special Temporary Authority is the wearable transmitter which is pre-connected to the glucose sensor and attached to the patient’s skin via an adhesive patch. The wearable transmitter is a Bluetooth Low Energy (BLE) device which acquires the sensor signal, logs the sensor data and uploads the data at the end of the trial. The wearable transmitter is also designed to communicate the sensor signal every five minutes via BLE to a compatible display device i.e. smart phone. Dexcom conducts immunity testing to verify the wearable transmitter meets requirements for a Home Healthcare Environment and the requirements of the FCC for an intentional and unintentional radiator device prior to conducting a clinical investigation. As a result, Dexcom evaluated the wearable transmitter according to Electromagnetic Compatibility (EMC) requirements as defined by IEC 60601-1-2:2014 Clause 7.3 under the requirements for Group 1, Level B. The device met these EMC test requirements. In addition, Dexcom evaluated the wearable transmitter to FCC Part 15 Subpart C Section 15.247. The device met the requirements for Peak Output Power (Part 15 Subpart C §15.247(b)(3)), Minimum 6 dB RF Bandwidth (Part 15 Subpart C §15.247(a)(2)), Band-edge Compliance of RF Conducted Emissions (Part 15 Subpart C §15.247(d)), and Power Spectral Density for Digitally Modulated Device (Part 15 Subpart C §15.247(e)). The wearable transmitter was also tested according to Radiated Spurious Emissions (Part 15 Subpart C §15.247(d)), however the device under test failed at 7319.25 MHz and 7440.75 MHz which is in the frequency band for “SPACE RESEARCH (Earth-to-space)” and “SATELLITE MOBILE” as the device frequencies were above FCC limits intended for Mobile and Fixed Satellites (Federal use only). As a result, Dexcom is seeking this Special Temporary Authority to operate the transmitter given the noted failures in spurious emissions. The particulars of operation for these frequencies which require this Special Temporary Authority are summarized in the next section of this request. The transmitter passed all FCC requirements for the remaining frequencies of operation in the BLE(ISM) Amateur Band (2.4 GHz and 2.4835 GHz) and therefore no Special Temporary Authority is necessary for these remaining frequencies of operation. Dexcom conducted further analysis of these failures and determined that there is no potential risk to the subject or “SPACE RESEARCH” and “SATELLITE MOBILE” communication channel for the following reasons: 1. The study design only requires the subject’s data be downloaded via BLE communication in a clinic environment one time at the end of the trial session; 2. Transmission and reception of these satellite systems is via parabolic dishes and are typically 3m-8m in diameter, receiving antenna are highly selective and positioned directly at the satellite when receiving; 3. The wearable transmitter’s signal cannot affect the high-power output of these satellite transmitters (Note: Satellite transmitters typical output power 10W vs. wearable output power of 1mW, a factor of 40dB); 4. The wearable transmitter would need to be precisely aligned to the satellite receiver’s electronics which would require that the subject be positioned inside of the dish in order to possibly interfere; 5. All investigational devices will be tracked, dispositioned, returned to Dexcom and disposed according to Good Clinical Practice guidelines at the end of the clinical trial; 6. The wearable transmitter passed CISPR 11 required in 60601-1-2 emissions testing. In summary, there is no potential risk to subjects due to the device under test’s failure to Radiated Spurious Emissions at the third harmonic of the fundamental 2.4GHz signal (as indicated by passing the 60601-1-2 emissions testing) and there is an extremely low potential to interfere with reception for Federal Fixed/Mobile Satellites. As a result, Dexcom would like to request this Special Temporary Authority to conduct this limited clinical investigation (under 6 months) to continue developmental efforts on the next generation continuous glucose monitoring system.

Purpose of Operation
Please explain the purpose of operation:  Dexcom intends to conduct a medical device clinical investigation which utilizes a wearable transmitter that communicates over BLE in order to allow investigators to download the logged sensor signal recorded on the wearable transmitter database in a clinic environment. The wearable transmitter also has the ability to communicate to a compatible display device once every five minutes via BLE, however support for communication to a display device will not be available to subjects during the clinical study. This Special Temporary Authority will enable Dexcom to gather valuable data to further develop the next generation glucose sensing technology and glucose sensing algorithm.

Information
Callsign: WP9XPB
Class of Station: MO
Nature of Service: Experimental

Requested Period of Operation
Operation Start Date: 11/18/2019
Operation End Date: 12/31/2019

Manufacturer
List below transmitting equipment to be installed (if experimental, so state) if additional rows are required, please submit equipment list as an exhibit:  
Manufacturer Model Number No. Of Units Experimental
Dexcom, Inc. MT26240 544 No

Certification
Neither the applicant nor any other party to the application is subject to a denial of Federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862, because of a conviction for possession or distribution of a controlled substance. The applicant hereby waives any claim to the use of any particular frequency or electromagnetic spectrum as against the regulatory power of the United States because of the prvious use of the same, whether by license or otherwise, and requests authorization in accordance with this application. (See Section 304 of the Communications Act of 1934, as amended.) The applicant acknowledges that all statements made in this application and attached exhibits are considered material representations, and that all the exhibits part hereof and are incorporated herein as if set out in full in this application; undersigned certifies that all statements in this application are true, complete and correct to the best of his/her knowledge and belief and are made in good faith. Applicant certifies that construction of the station would NOT be an action which is likely to have a significant environmental effect. See the Commission's Rules, 47 CFR1.1301-1.1319.
Signature of Applicant (Authorized person filing form): Jacob Nardone
Title of Applicant (if any): Staff Regulatory Affairs Specialist
Date: 2019-10-24 00:00:00.0

Station Location
City State Latitude Longitude Mobile Radius of Operation
North  33  5  22 West  117  4  46 625 W Citracado Pkwy 112 Escondido,CA 92025 0.01
Datum:  NAD 83
Is a directional antenna (other than radar) used?   No
Exhibit submitted:   No
(a) Width of beam in degrees at the half-power point:  
(b) Orientation in horizontal plane:  
(c) Orientation in vertical plane:  
Will the antenna extend more than 6 meters above the 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
(a) Overall height above ground to tip of antenna in meters:  
(b) Elevation of ground at antenna site above mean sea level in meters:  
(c) Distance to nearest aircraft landing area in kilometers:  
(d) List any natural formations of existing man-made structures (hills, trees, water tanks, towers, etc.) which, in the opinion of the applicant, would tend to shield the antenna from aircraft:
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.016000 uW 0.026700 uW M 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.087000 uW 0.143000 uW P 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.016000 uW 0.039000 uW M 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec

City State Latitude Longitude Mobile Radius of Operation
North  45  30  4 West  122  41  22 3147 SW Sam Jackson Park Road Portland OR 97239 0.01
Datum:  NAD 83
Is a directional antenna (other than radar) used?   No
Exhibit submitted:   No
(a) Width of beam in degrees at the half-power point:  
(b) Orientation in horizontal plane:  
(c) Orientation in vertical plane:  
Will the antenna extend more than 6 meters above the 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
(a) Overall height above ground to tip of antenna in meters:  
(b) Elevation of ground at antenna site above mean sea level in meters:  
(c) Distance to nearest aircraft landing area in kilometers:  
(d) List any natural formations of existing man-made structures (hills, trees, water tanks, towers, etc.) which, in the opinion of the applicant, would tend to shield the antenna from aircraft:
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.016000 uW 0.026700 uW M 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.087000 uW 0.143000 uW P 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.016000 uW 0.039000 uW M 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec

City State Latitude Longitude Mobile Radius of Operation
North  32  54  44 West  117  11  22 6350 Sequence Dr San Diego 92121 0.01
Datum:  NAD 83
Is a directional antenna (other than radar) used?   No
Exhibit submitted:   No
(a) Width of beam in degrees at the half-power point:  
(b) Orientation in horizontal plane:  
(c) Orientation in vertical plane:  
Will the antenna extend more than 6 meters above the 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
(a) Overall height above ground to tip of antenna in meters:  
(b) Elevation of ground at antenna site above mean sea level in meters:  
(c) Distance to nearest aircraft landing area in kilometers:  
(d) List any natural formations of existing man-made structures (hills, trees, water tanks, towers, etc.) which, in the opinion of the applicant, would tend to shield the antenna from aircraft:
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.016000 uW 0.026700 uW M 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.087000 uW 0.143000 uW P 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec
Action Frequency Station Class Output Power/ERP Mean Peak Frequency Tolerance (+/-) Emission Designator Modulating Signal
New 7.31910000-7.44010000 GHz MO 0.016000 uW 0.039000 uW M 40.00000000 % 2M00F3D GSFK,1000000 symbols/sec

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