Test Report 2

FCC ID: OWS-NIC514

Test Report

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FCCID_1256809

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 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-NIC514 IC: 5975A-NIC514 Model No.: 340-040304 Add External Antenna: Amphenol monopole with integral cable (22ft RG174) 900 MHz operation only II. DESCRIPTION OF EQUIPMENT UNDER TEST (EUT) The Silver Spring Networks (SSN) NIC514 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. The product has been certified with an internal dual band antenna. The board has been modified to make provision for connecting an optional external antenna. The modification consists of the addition of a diplexer and an antenna switch. III. TEST DATES AND TEST LOCATION Testing was performed on various dates between 13-23 October 2009. 900 MHz and 2.4 GHz radiated emissions tests were performed at: Compliance Certification Services 47173 Benicia Street Fremont, CA 94538 Antenna port conducted tests were performed at Silver Spring Networks. T.N. Cokenias 23 January 2010 EMC Consultant/Agent for Silver Spring Networks Page 1 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 15.203 Antenna connector requirement The EUT has a new antenna port connector for an optional external antenna. Antenna description Mfr. Model Gain No. Internal dual band SSN n/a 4 dBi at 915 MHz antenna 1 dBi at 2.4 GHz External Monopole whip Amphenol n/a 5 dBi at 915 MHz antenna 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. Tests were performed at three frequencies: 900 MHz FHSS Channel 0 (LOW) – 902.3 MHz Channel 43 (MID) -915.2 MHz Channel 82 (HIFH) – 926.9 MHz Page 2 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 Test Equipment Compliance Certification Services: TEST EQUIPMENT LIST Description Manufacturer Model Asset Number Cal Due Spectrum Analyzer, 44 GHz Agilent / HP E4446A C01069 01/05/10 Antenna, Bilog, 2 GHz Sunol Sciences JB1 C01011 01/14/10 Preamplifier, 1300 MHz Agilent / HP 8447D C00885 12/16/09 Antenna, Horn, 18 GHz EMCO 3115 C00945 01/29/10 Preamplifier, 26.5 GHz Agilent / HP 8449B C01052 02/04/10 EMI Test Receiver, 30 MHz R&S ESHS 20 N02396 08/06/09 LISN, 30 MHz FCC LISN-50/250-25-2 N02625 10/29/09 LISN, 30 MHz Solar 8012-50-R-24-BNC N02481 10/29/09 Silver Spring Networks: Equipment Mfr Model Serial No. Cal Date Spectrum analyzer Agilent E44053 MY45113391 07/23/10 Spectrum analyzer Agilent EXA MY48030147 07/23/10 Spectrum Analyzer HP 8562B 2712A00113 09/25/10 Test Set-up Diagram laptop Serial cable or PC 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 3 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 FREQUENCY HOPPING SPREAD SPECTRUM RADIO EMISSIONS Page 4 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 TEST RESULTS Radiated Test Set-up, 30 MHz - 9.3 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 5 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 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 6 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 Radiated Emissions Above 1 GHz Page 7 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 High Frequency Measurement Compliance Certification Services, Fremont 5m Chamber Company: Silver Springs Networks Project: 09U12834 Date: 10/13/09 Test Engineer: Doug Anderson Configuration: EUT with External Antenna and Support Console PC Mode: Normal Test Equipment: Horn 1-18GHz Pre-amplifer 1-26GHz Pre-amplifer 26-40GHz Horn > 18GHz T59; S/N: 3245 @3m T145 Agilent 3008A0056 Hi Frequency Cables 3' cable 22807700 12' cable 22807600 20' cable 22807500 HPF Reject Filter Peak Measurements RBW=VBW=1MHz 3' cable 22807700 12' cable 22807600 20' cable 22807500 HPF_1.5GHz 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) Low Channel: 902.3MHz 2.707 3.0 50.4 46.8 29.1 4.1 -35.2 0.0 0.6 49.0 45.4 74 54 -25.0 -8.6 V 3.609 3.0 43.0 30.2 31.3 4.8 -34.9 0.0 0.6 44.8 32.0 74 54 -29.2 -22.0 V 4.512 3.0 43.6 35.2 32.5 5.6 -34.8 0.0 0.6 47.5 39.1 74 54 -26.5 -14.9 V 5.414 3.0 44.4 37.1 33.4 6.2 -34.9 0.0 0.5 49.7 42.4 74 54 -24.3 -11.6 V 8.120 3.0 48.5 41.6 36.2 7.7 -34.6 0.0 0.7 58.5 51.7 74 54 -15.5 -2.3 V 9.023 3.0 41.9 29.6 36.8 8.2 -34.8 0.0 0.7 52.8 40.5 74 54 -21.2 -13.5 V 2.707 3.0 50.2 46.6 29.1 4.1 -35.2 0.0 0.6 48.9 45.3 74 54 -25.1 -8.7 H 4.512 3.0 43.3 31.5 32.5 5.6 -34.8 0.0 0.6 47.2 35.4 74 54 -26.8 -18.6 H 5.414 3.0 42.4 29.6 33.4 6.2 -34.9 0.0 0.5 47.7 34.9 74 54 -26.3 -19.1 H 8.120 3.0 44.1 33.6 36.2 7.7 -34.6 0.0 0.7 54.1 43.6 74 54 -19.9 -10.4 H Middle Channel: 915.2MHz 2.746 3.0 50.9 47.5 29.3 4.1 -35.2 0.0 0.6 49.6 46.3 74 54 -24.4 -7.7 V 4.576 3.0 46.2 40.2 32.6 5.6 -34.8 0.0 0.6 50.2 44.1 74 54 -23.8 -9.9 V 8.237 3.0 48.0 41.7 36.3 7.8 -34.6 0.0 0.7 58.1 51.9 74 54 -15.9 -2.1 V 2.746 3.0 49.9 45.7 29.3 4.1 -35.2 0.0 0.6 48.6 44.5 74 54 -25.4 -9.5 H 4.576 3.0 44.3 36.3 32.6 5.6 -34.8 0.0 0.6 48.2 40.2 74 54 -25.8 -13.8 H 8.237 3.0 44.6 35.2 36.3 7.8 -34.6 0.0 0.7 54.8 45.4 74 54 -19.2 -8.6 H High Channel: 926.9MHz 2.781 3.0 50.0 46.2 29.4 4.2 -35.2 0.0 0.6 48.9 45.1 74 54 -25.1 -8.9 V 3.708 3.0 42.4 30.1 31.5 4.9 -34.9 0.0 0.6 44.5 32.2 74 54 -29.5 -21.8 V 4.635 3.0 45.9 40.4 32.6 5.7 -34.8 0.0 0.6 49.9 44.4 74 54 -24.1 -9.6 V 8.342 3.0 42.6 31.9 36.4 7.8 -34.6 0.0 0.7 52.8 42.2 74 54 -21.2 -11.8 V 2.781 3.0 50.4 46.7 29.4 4.2 -35.2 0.0 0.6 49.3 45.6 74 54 -24.7 -8.4 H 4.635 3.0 43.1 34.2 32.6 5.7 -34.8 0.0 0.6 47.1 38.2 74 54 -26.9 -15.8 H 8.342 3.0 43.3 31.4 36.4 7.8 -34.6 0.0 0.7 53.6 41.6 74 54 -20.4 -12.4 H Rev. 11.10.08 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 8 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 Radiated Emissions Below 1 GHZ All radio emissions below 1GHz, except for the fundamental were more than 20 dB below limit. Page 9 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 PEAK OUTPUT POWER PEAK POWER LIMIT §15.247 (b) The maximum peak output power of the intentional radiator shall not exceed the following: §15.247 (b) (2) For frequency hopping systems operating in the 902-928 MHz band, employing at least 50 hopping channels: 1 watt; and employing less than 50 hopping channels, but at least 25 hopping channels: 0.25 watt. §15.247 (b) (4) Except as shown in paragraphs (b)(3) (i), (ii) and (iii) of this section, if transmitting antennas of directional gain greater than 6 dBi are used the peak output power from the intentional radiator shall be reduced below the stated values in paragraphs (b)(1) or (b)(2) of this section, as appropriate, by the amount in dB that the directional gain of the antenna exceeds 6 dBi. The maximum antenna gain is 4 dBi, therefore the power limit is 30 dBm. TEST PROCEDURE The transmitter output was connected to a spectrum analyzer and the analyzer bandwidth was set to a value greater than the 20 dB bandwidth of the EUT. Note: Power measurements were made at the external antenna connector port on the radio board. RESULTS No non-compliance noted: Channel Frequency P out Low 902.3 29.01 Mid 914.9 28.94 High 926.9 28.76 Page 10 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 OUTPUT POWER LOW CHANNEL Page 11 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 OUTPUT POWER MID CHANNEL Page 12 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 OUTPUT POWER HIGH CHANNEL Page 13 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 MAXIMUM PERMISSIBLE EXPOSURE LIMITS §1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of §2.1093 of this chapter. Page 14 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 CALCULATIONS Given E =  (30 * P * G) / d and S = E ^ 2 / 3770 where E = Field Strength in Volts/meter P = Power in Watts G = Numeric antenna gain d = Distance in meters S = Power Density in milliwatts/square centimeter Combining equations and rearranging the terms to express the distance as a function of the remaining variables yields: d =  ((30 * P * G) / (3770 * S)) Changing to units of Power to mW and Distance to cm, using: P (mW) = P (W) / 1000 and d (cm) =100 * d (m) yields d = 100 *  ((30 * (P / 1000) * G) / (3770 * S)) d = 0.282 *  (P * G / S) where d = distance in cm P = Power in mW G = Numeric antenna gain S = Power Density in mW/cm^2 Substituting the logarithmic form of power and gain using: P (mW) = 10 ^ (P (dBm) / 10) and G (numeric) = 10 ^ (G (dBi) / 10) yields d = 0.282 * 10 ^ ((P + G) / 20) /  S Equation (1) where d = MPE distance in cm P = Power in dBm G = Antenna Gain in dBi S = Power Density Limit in mW/cm^2 Equation (1) and the measured peak power is used to calculate the MPE distance. Page 15 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 LIMITS From §1.1310 Table 1 (B), S = 0.6 mW/cm^2 RESULTS No non-compliance noted: Silver Spring Networks FCC ID: OWS-NIC514 IC: 5975A- NIC514 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: 0.60 (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 29.0 5.0 18.3 0.50 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 MPE Distance: 18.3 cm NOTE: For mobile or fixed location transmitters, the minimum separation distance is 20 cm, even if calculations indicate that the MPE distance would be less. Page 16 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 CONDUCTED SPURIOUS EMISSIONS LIMITS §15.247 (c) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement. Attenuation below the general limits specified in §15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in§15.205(a), must also comply with the radiated emission limits specified in §15.209(a) (see §15.205(c)). TEST PROCEDURE The transmitter output is connected to a spectrum analyzer. The resolution bandwidth is set to 100 kHz. The video bandwidth is set to 100 kHz. The spectrum from 30 MHz to 10 GHz is investigated with the transmitter set to the lowest, middle, and highest channels. RESULTS No non-compliance noted: Page 17 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 SPURIOUS EMISSIONS, LOW CHANNEL SPURIOUS EMISSIONS, MID CHANNEL SPURIOUS EMISSIONS, HIGH CHANNEL Page 18 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 SETUP PHOTOS ANTENNA PORT CONDUCTED RF MEASUREMENT SETUP, SILVER SPRING NETWORKS Page 19 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 RADIATED RF MEASUREMENT SETUP, CCS Page 20 of 21

Silver Spring Networks Report No. 10PRO001 FCC ID: OWS-NIC5514 Model: 340-040304 END OF REPORT Report Revision History Revision Revision Description Pages Revised by Date No. Revised - Original Issue T. Cokenias 01/23/2010 Page 21 of 21


Document Created: 2010-01-27 10:48:14
Document Modified: 2010-01-27 10:48:14
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