DTS portion of Test report

FCC ID: OWS-NIC507

Test Report

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FCCID_1007980

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 EMISSIONS TEST REPORT FOR A LOW POWER TRANSMITTER I. GENERAL INFORMATION Requirement: FCC Test Requirements: FCC Part 15 Applicant: Silver Spring Networks 575 Broadway Street Redwood City, CA 94063 FCC ID: OWS-NIC507 Model No.: 174-000084 II. DESCRIPTION OF EQUIPMENT UNDER TEST (EUT) The Silver Spring Networks (SSN) model 174-000084 is a radio module for electric power meter communications use. The board incorporates a 900 MHz frequency hopping i210 Mesh radio and a 2.4GHz 802.15.4 Zigbee Home Area Network (HAN radio. III. TEST DATES AND TEST LOCATION Testing was performed on various dates between 22 August – 27 September 2008. Radiated, 2.4 GHz antenna conducted power,2.4 GHz antenna conducted spurious, and AC line conducted emissions tests were performed at: Compliance Certification Services 47173 Benicia Street Fremont, CA 94538 All other antenna port conducted tests were performed at Silver Spring Networks. T.N. Cokenias 27 September 2008 EMC Consultant/Agent for Silver Spring Networks Page 1of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 15.203 Antenna connector requirement The EUT uses a custom permanently attached integral antenna, a special sheet metal antenna manufactured by Silver Spring Networks for electric meters Antenna description Mfr. Model Gain No. Built-in sheet metal SSN n/a 2.4 dBi at 915 MHz electric meter 1.5 dBi at 2.4 GHz TEST PROCEDURES All tests were performed in accordance with the applicable procedures called out in the following documents, unless otherwise noted: FCC 47CFR15 RSS-210 Issue 7: Low power license exempt radio frequency devices (July 2007) RSS-212: Test Facilities and Test Methods for Radio Equipment ANSI C63.4 – 2003, American National Standard for Methods of Measurement of Radio- Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz. For each radio, tests were performed at three frequencies: 2.4 GHz HAN Radio Channel 11 (LOW) – 2405.8 MHz Channel 18 (MID) – 2440.8 MHz Channel 26 (HIGH) – 2480.9 MHz 900 MHz FHSS Channel 0 (LOW) – 902.3 MHz Channel 42 (MID) -914.9 MHz Channel 82 (HIFH) – 926.9 MHz Page 2of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Test Equipment Compliance Certification Services: Equipment Mfr Model Asset No. Cal Due Spectrum analyzer Agilent E4446A C01159 10/27/08 (radiated emissions 2.4GHz Pout, spurs) EMI Receiver HP 8542E C00967 09/10/09 Bilog antenna Sunol Sciences JBI C01016 09/28/08 Pre-amplifier Agilent HP8447D C00885 03/31/09 Horn antenna EMCO 3115 C00872 03/31/09 Pre-amplifier Agilent HP 8449B C00749 09/27/08 EMI Receiver R&S ESHS-20 827129/006 01/27/09 LISN FCC LISN50/250-25-2 2023 09/27/08 Silver Spring Networks: Equipment Mfr Model Asset No. Cal Date Spectrum analyzer Agilent E44053 1077004 06/29/08 Test Set-up Diagram laptop Serial cable EUT DC Supply (+4 Volts) 120VAC Support Equipment Equipment Mfr Model Asset No. DC Power Supply Agilent E3610A 2844 Laptop PC Dell PP01L TW-0791UH1280- OC9-6558 AC/DC adapter CUI Inc. DSA-60W-20 2607HB Page 3of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 2.4 GHz HAN Radio Emissions Test Results Page 4of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 TEST RESULTS Radiated Test Set-up, 30-26 GHz Bilog or Horn Antenna 1-4m 3m EUT preamplifier Fig. 1 Test Procedures Radiated emissions generated by the transmitter portion of the EUT were measured. 1. The EUT was placed on a wooden table resting on a turntable on the test site. The search antenna was placed 3m from the EUT. The EUT antenna was mounted in the with the EUT TX antenna pointed directly to the search antenna. 2. The turntable was slowly rotated to locate the direction of maximum emission at each emission falling in the restricted bands of 15.205. 3. Emissions were investigated to the 10th harmonic of the fundamental. 4. Once maximum direction was determined, the search antenna was raised and lowered in both vertical and horizontal polarizations. The maximum readings so obtained are recorded in the data listed below. Test Results: Worst-case results are presented. Refer to data sheets below. Restricted band emissions meet 54 dBuV/m. Other undesired emissions from the transmitter meet the -20 dBc requirement in 15.247(d). Page 5of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 15.205 Restricted Frequency Bands MHz MHz MHz GHz 0.090 - 0.110 16.42 - 16.423 399.9 - 410 4.5 - 5.15 0.495 - 0.505 (1) 16.69475 - 16.69525 608 - 614 5.35 - 5.46 2.1735 - 2.1905 16.80425 - 16.80475 960 - 1240 7.25 - 7.75 4.125 - 4.128 25.5 - 25.67 1300 - 1427 8.025 - 8.5 4.17725 - 4.17775 37.5 - 38.25 1435 - 1626.5 9.0 - 9.2 4.20725 - 4.20775 73 - 74.6 1645.5 - 1646.5 9.3 - 9.5 6.215 - 6.218 74.8 - 75.2 1660 - 1710 10.6 - 12.7 6.26775 - 6.26825 108 - 121.94 1718.8 - 1722.2 13.25 - 13.4 6.31175 - 6.31225 123 - 138 2200 - 2300 14.47 - 14.5 8.291 - 8.294 149.9 - 150.05 2310 - 2390 15.35 - 16.2 8.362 - 8.366 156.52475 - 2483.5 - 2500 17.7 - 21.4 8.37625 - 8.38675 156.52525 2655 - 2900 22.01 - 23.12 8.41425 - 8.41475 156.7 - 156.9 3260 - 3267 23.6 - 24.0 12.29 - 12.293 162.0125 - 167.17 3332 - 3339 31.2 - 31.8 12.51975 - 12.52025 167.72 - 173.2 3345.8 - 3358 36.43 - 36.5 12.57675 - 12.57725 240 - 285 3600 - 4400 13.36 - 13.41 322 - 335.4 15.209 Gen eral Field Strength Limits Frequency Field Strength Measurement Distance (MHz) (microvolts/meter) (meters) _______________________________________________________________ 0.009 - 0.490 2400/F(kHz) 300 0.490 - 1.705 24000/F(kHz) 30 1.705 - 30.0 30 30 30 - 88 100 ** 3 88 - 216 150 ** 3 216 - 960 200 ** 3 Above 960 500 3 _______________________________________________________________ Page 6of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 2.4 GHz HAN Radiated Spurious High Frequency Measurement Compliance Certification Services, Morgan Hill Open Field Site Company: Silver Spring Network Project #: 08U11890 Date: 8/15/08 Test Engineer: Thanh Nguyen Configuration: EUT at Y position Mode: Transmit 2.4GHz Band Test Equipment: Horn 1-18GHz Pre-amplifer 1-26GHz Pre-amplifer 26-40GHz Horn > 18GHz T60; S/N: 2238 @3m T144 Miteq 3008A00931 Hi Frequency Cables 2 foot cable 3 foot cable 12 foot cable HPF Reject Filter Peak Measurements RBW=VBW=1MHz Gordon 187207002 Gordon 203134001 HPF_4.0GHz Average Measurements RBW=1MHz ; VBW=10Hz f Dist Read Pk Read Avg. AF CL Amp D Corr Fltr Peak Avg Pk Lim Avg Lim Pk Mar Avg Mar Notes GHz (m) dBuV dBuV dB/m dB dB dB dB dBuV/m dBuV/m dBuV/m dBuV/m dB dB (V/H) Channel setting ATS107=11 CH 2405.8 MHz ATS112 =9 4.812 3.0 45.55 35.38 33.0 10.9 -36.5 0.0 0.6 53.6 43.4 74 54 -20.4 -10.6 V 12.026 3.0 42.53 29.04 37.5 16.1 -35.4 0.0 0.9 61.6 48.1 74 54 -12.4 -5.9 V 4.812 3.0 45.6 35.5 33.0 10.9 -36.5 0.0 0.6 53.7 43.5 74 54 -20.3 -10.5 H 12.027 3.0 41.9 29.0 37.5 16.1 -35.4 0.0 0.9 61.0 48.1 74 54 -13.0 -5.9 H Channel setting ATS107=18 Channel 2440.8MHz ATS 112=9 4.882 3.0 43.35 32.69 33.1 10.9 -36.5 0.0 0.6 51.5 40.8 74 54 -22.5 -13.2 V 7.322 3.0 42.79 30.99 35.5 12.7 -36.2 0.0 0.6 55.4 43.6 74 54 -18.6 -10.4 V 12.204 3.0 41.28 28.63 37.4 16.2 -35.4 0.0 0.9 60.4 47.8 74 54 -13.6 -6.2 V 4.882 3.0 43.26 33.21 33.1 10.9 -36.5 0.0 0.6 51.4 41.4 74 54 -22.6 -12.6 H 12.204 3.0 41.67 29.67 37.4 16.2 -35.4 0.0 0.9 60.8 48.8 74 54 -13.2 -5.2 H Channel Setting ATS107=26 Channel 2480.9MHz ATS112=9 4.962 3.0 45.13 34.13 33.1 11.0 -36.5 0.0 0.6 53.4 42.4 74 54 -20.6 -11.6 V 7.443 3.0 41.86 30.12 35.6 12.7 -36.2 0.0 0.6 54.6 42.9 74 54 -19.4 -11.1 V 12.405 3.0 41.85 29.12 37.4 16.3 -35.4 0.0 0.9 61.1 48.3 74 54 -12.9 -5.7 V 4.962 3.0 45.92 36.38 33.1 11.0 -36.5 0.0 0.6 54.2 44.7 74 54 -19.8 -9.3 H 7.443 3.0 43.33 32.81 35.6 12.7 -36.2 0.0 0.6 56.1 45.6 74 54 -17.9 -8.4 H 12.405 3.0 41.85 29.12 37.4 16.3 -35.4 0.0 0.9 61.1 48.3 74 54 -12.9 -5.7 H f Measurement Frequency Amp Preamp Gain Avg Lim Average Field Strength Limit Dist Distance to Antenna D Corr Distance Correct to 3 meters Pk Lim Peak Field Strength Limit Read Analyzer Reading Avg Average Field Strength @ 3 m Avg Mar Margin vs. Average Limit AF Antenna Factor Peak Calculated Peak Field Strength Pk Mar Margin vs. Peak Limit CL Cable Loss HPF High Pass Filter Page 7of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Radiated Emissions 30-1000 MHz Page 8of 74

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Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 6dB Bandwidth for DTS Test Requirement: FCC: 15.247 (a)2 IC: RSS-210 Sec. 6.2.2(o)(iv) Test Set-up EUT Spectrum Atten. Analyzer Test Procedures A modified EUT with a coaxial cable attached to the radio antenna port was configured on a test bench. The cable's SMA connector was connected to the spectrum analyzer. The EUT transmission was continuous at the LOW channel. While the transmitter broadcast a steady stream of digital data, the analyzer OCCUPIED BW function was activated to measure 6 dB BW and 99% BW. Test was repeated for MID and HIGH channels. Test Results. No non-compliance noted. Refer to data sheets below. Minimum 6 dB BW: 1.158 MHz Minimum Required: 500 kHz Page 10of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 6dB Bandwidth LOW Channel Page 11of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 6 dB BW, MID Channel Page 12of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 6 dB BW, HIGH Channel Page 13of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 99% Bandwidth Test Setup EUT Spectrum Atten. Analyzer Limit None: for reporting purposes only. Test Procedure The transmitter output is connected to the spectrum analyzer. The RBW is set to 1% to 3% of the 99 % bandwidth. The VBW is set to 3 times the RBW. The sweep time is coupled. The spectrum analyzer internal OCCUPIED BW function was utilized. Test Results Refer to spectrum analyzer charts below. 99% bandwidth approximately 2.4 MHz. Page 14of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 99% Bandwidth LOW Channel Page 15of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 99% Bandwidth MID Channel Page 16of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 99% Bandwidth HIGH Channel Page 17of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 RF Power Output Test Requirement: FCC: 15.247(b) IC: RSS-210 Sec. 6.2.2(o)(iv) Test Setup EUT Spectrum Atten. Analyzer Test Procedures 1.The EUT was configured on a test bench. RBW was set to a value higher than the 2.5 MHz 99% band width: RBW=3 MHz, VBW=8 MHz 2. The spectrum analyzer detector was set to PEAK and the highest value was recorded using the analyzer PEAK SEARCH function. Test Results Refer to spectrum analyzer graphs. Reference level offset corrects for external attenuation and cable loss. Channel Frequency, MHz Output Power, dBm Low 2405.8 23.49 Mid 2440.8 23.01 High 2480.9 22.15 Page 18of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Peak Output Power LOW Channel Page 19of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Peak Output Power MID Channel Page 20of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Peak Output Power HIGH Channel Page 21of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Spurious Emissions, Conducted Test Requirement: FCC: 15.247(d) IC: RSS-210 Sec. 6.2.2(o)(e1) Test Setup EUT Spectrum Atten. Analyzer Test Procedure 1. The EUT was configured on a test bench. The cable was connected between the EUT antenna port and the spectrum analyzer input port. Spectrum analyzer RES BW was set to 100 kHz. While the transmitter broadcast a steady stream of digital data, the analyzer MAX HOLD function was used to capture the envelope of the transmission. Readings were taken out to 10fo. Test Results Refer to spectrum analyzer plots. Data shows out of band emissions are suppressed well below the -20 dBc minimum required by the Rules. Page 22of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Lower band edge, -20 dBc, LOW Channel TX Spurious Emissions LOW Channel Page 23of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 -20 dBc MID Channel Reference TX Spurious, MID Channel Page 24of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Upper band edge, -20 dBc HIGH Channel TX Spurious, HIGH Channel Page 25of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Power Spectral Density Test Requirement: 15.247(e) RSS-210 Sec. 6.2.2(o)(iv) Test Setup EUT Spectrum Atten. Analyzer Test Procedure 1. Determine frequency at which maximum emission occurs during pre-scan. 2. Reduce SPAN to 300 kHz, while adjusting tuning frequency so that peak remains at center of screen. 3. Set RES BW =3 kHz, VID BW = 10 kHz, SWEEP = 100 sec. 4. Record highest reading and compare to 8 dBm limit. Test Results Maximum PSD was 5.4 dBm. Refer to attached spectrum analyzer chart. Page 26of 74

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Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Power Spectral Density MID Channel Page 28of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 Power Spectral Density HIGH Channel Page 29of 74

Silver Spring Networks Report No. 08PRO18 REV1.1 FCC ID: OWS-NIC507 Model: 174-000084 RF Exposure (MPE) Calculations Silver Spring Networks FCC ID: OWS-NIC507 IC: 5975A- NIC507 Utility Meter WLAN Transceiver 2.4 GHz Calculate mW/cm2 here. Enter frequency in MHz: RF Hazard Distance Calculation Calculation of Limits from 1.1310 Table 1 Controlled Uncontrolled Ave 6 min Ave 30 min mW/cm2 from Table1: 1.00 (E: 61 V/m) F(MHz) Actual F, MHz Occ, mW/c2 Gen, mW/cm2 0.3-3 0.5 100.0 100.0 Max RF Power TX Antenna MPE distance S, mW/cm@ Comment 3.0 - 30.0 5 180.0 36.0 P, dBm G, dBi cm at 20 cm 3 0.0-300 55 1.0 0.2 300-1500 902 3.0 0.60 24.3 1.0 5.2 0.07 1500-100000 5555 5.0 1.0 Enter P(mW) Equivalent dBm Enter dBm Equivalent Watts Basis of Calculations: 64 18.1 18.1 64.6 E^2/3770 = S, mW/cm2 E, V/m = (Pwatts*Ggain*30)^.5/d, meters d = ((Pwatts*G*30)/3770*S))^0.5 Pwatts*Ggain = 10^(PdBm-30+GdBi)/10) S@20cm = 20 log (MPE dist/20cm) NOTE: For mobile or fixed location transmitters, minimum separation distance is for FCC compliance is 20 cm, even if calculations indicate MPE distance is less Page 30of 74


Document Created: 2008-09-28 13:49:32
Document Modified: 2008-09-28 13:49:32
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