Test Report 1

FCC ID: OWS-NIC504

Test Report

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FCC Part 15.247 Certification Application Industrie Canada RSS210 Certification Application EMI Test Report on Silverspring Networks FSU Model:210-910001 FCC ID: OWS-NIC504 IC ID: 5975A-NIC504 Prepared by: David Waitt 21565 Mary Alice Way Report SSN06 Los Gatos California david@waitt.us (408) 832 7053 Page 1 of 23

FCC Part 15 / IC RSS-210 Certification Application Table of Contents Section Page General Information ........................................................................................................................................................ 3 Detailed Product Information ......................................................................................................................................... 4 Test Results Summary.................................................................................................................................................... 5 Test Facilities................................................................................................................................................................... 6 Equipment Lists............................................................................................................................................................... 6 Instrument Calibration.................................................................................................................................................... 6 Elliott Test Equipment .................................................................................................................................................... 7 Test Methods ................................................................................................................................................................... 8 Test Results ..................................................................................................................................................................... 9 Maximum RF Power Output at Antenna Terminals ..................................................................................................... 10 Specifications:........................................................................................................................................................................................................10 Procedure: .............................................................................................................................................................................................................10 Results: ..................................................................................................................................................................................................................10 20 dB Bandwidth......................................................................................................................................................... 10 Specifications.........................................................................................................................................................................................................10 Procedure: .............................................................................................................................................................................................................10 Results: ..................................................................................................................................................................................................................10 900MHz Band Edge.................................................................................................................................................... 13 Specifications:........................................................................................................................................................................................................13 Procedure: .............................................................................................................................................................................................................13 Results: ..................................................................................................................................................................................................................13 Radiated Emissions in Restricted Bands & Out of Band Radiated Emissions............................................................ 14 Specifications:........................................................................................................................................................................................................14 Procedure: .............................................................................................................................................................................................................14 Results: ..................................................................................................................................................................................................................16 EUT Transmitting on LOW channel, 902.3 MHz....................................................................................................................................................16 EUT Transmitting on MID channel, 914.6 MHz......................................................................................................................................................17 EUT Transmitting on HIGH channel, 926.9 MHz ...................................................................................................................................................18 Number of Hopping Channels ..................................................................................................................................... 19 Specifications:........................................................................................................................................................................................................19 Procedure: .............................................................................................................................................................................................................19 Results: ..................................................................................................................................................................................................................19 Channel Spacing.......................................................................................................................................................... 21 Specifications:........................................................................................................................................................................................................21 Procedure: .............................................................................................................................................................................................................21 Results: ..................................................................................................................................................................................................................21 30MHz - 1 GHz Spurious Radiated Emissions............................................................................................................ 22 Specification:..........................................................................................................................................................................................................22 Procedure: .............................................................................................................................................................................................................22 Results: (RCV mode) .............................................................................................................................................................................................22 Maximized quasi-peak readings (includes manipulation of EUT interface cables) ................................................................................................23 This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 2

FCC Part 15 / IC RSS-210 Certification Application General Information Unit(s) Under Test: FSU (Field Service Unit) Model(s): 210-910001 Product Description: “Field Service Unit“ FCC ID: OWS-NIC504 IC ID: 5975A-NIC504 Tested For: Silver Spring Networks 2755 Campus Drive Suite 205 San Mateo, CA 94403 Tested At: (Radiated Emissions) Elliott Laboratories 41039 Boyce Road Fremont, CA (RF Conducted tests) Elliott Laboratories 41039 Boyce Road Fremont, CA 94538 Tested By: Rafael Veralas, Test Engineer, Elliott Labs David Waitt, (Independent Consultant) Tested To: FCC CFR 47, Part 15.247, 900MHz FHSS Test Date: 27 July 2007 Requested Certifications: FCC Part 15 Subpart C certification IC RSS-210 / Issue 6 Certification This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 3

FCC Part 15 / IC RSS-210 Certification Application Detailed Product Information The FSU is a 900MHz FHSS radio that Silverspring intends to provide to field service personal to allow wireless interrogation of Silverspring wireless utility power meters. Number of hopping channels: 83 Operating Frequency Range: 902.3 MHz to 924.9 MHz Channel spacing: 300kHz RF Power Output: 4.25 dBm Antenna Gain: 0.8 dBi Antenna Type: Single, Integral, monopole Operating Voltage: Powered from a standard USB connection DUT: Engineering prototype, equivalent to mass produced items Modifications: No modifications were made to the unit during testing This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 4

FCC Part 15 / IC RSS-210 Certification Application Test Results Summary This report presents the results of the tests that verify compliance with FCC Part 15.247 and RSS210 A brief results summary of all the in this report is below. Part 15 RSS-210, Issue 6 Paragraph Paragraph Test Results 15.247(b)(2) A8.4(1) Maximum Power 4.25 dBm Max 15.247(a)(1)(i) A8.1(3) 20dB Bandwidth 157.5 kHz Max 15.247(d) A8.5 Out of Band Spurious Emissions 15.205 2.6 Radiated Emissions in Restricted bands 1.3dB in spec min @ 7415.16MHz (Restricted Band) 15.247(a)(1)(i) A8.1(2) Number of hopping channels 83 15.247(a)(1)(i) A8.1(2) Channel Spacing 300kHz This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 5

FCC Part 15 / IC RSS-210 Certification Application Test Facilities All radiated emissions testing for 15.247 (15.205) were performed at: Elliott Laboratories 41039 Boyce Road Fremont, CA 94538 Testing was conducted in accordance with ANSI C63.4 (2003) General: Pursuant to section 2.948 of the Rules, construction, calibration, and equipment data for chamber 1 has been filed with the Commission. The FCC recommends that ambient noise at the test site be at least 6 dB below the allowable limits. Within the chamber, ambient levels are well below this requirement. Considerable engineering effort has been expended to ensure that the facilities conform to all pertinent FCC requirements. Antenna, Antenna Mast and Turntable The Horn antennas that are use to measure radiated emissions above 1000MHz are amounted on a non-conductive antenna mast equipped with a motor drive to vary the antenna height. ANSI C63.4 specifies that the test height above the ground plane shall be 80cm unless the equipment is intended to be floor mounted. During the radiated emissions tests the equipment is positioned on a motorized turntable in conformance with the most recent ANSI requirements. Equipment Lists Instrument Calibration All test equipment is regularly checked to ensure that performance is maintained in accordance with the manufacturer's specifications. All antennas are calibrated at regular intervals with respect to tuned half-wave dipoles. This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 6

FCC Part 15 / IC RSS-210 Certification Application The following test equipment was used to perform the testing Elliott Test Equipment Radiated Emissions, 30 - 10,000 MHz, 16 Aug-07 Engineer: Rafael Veralas Manufacturer Description Model # Asset # Cal Due Microwave Preamplifier, 1- Hewlett Packard 8449B 263 16-Mar-08 26.5GHz EMCO Antenna, Horn, 1-18 GHz 3115 786 28-Nov-07 Rohde & Schwarz EMI Test Receiver, 20 Hz-7 GHz ESIB7 1630 11-Jan-08 Sunol Sciences Biconilog, 30-3000 MHz JB3 1657 03-May-08 High Pass filter, 1.5 GHz (Purple Hewlett Packard P/N 84300-80037 (84125C) 1769 08-Nov-07 System) SpecAn 9 kHz - 40 GHz, (SA40) Hewlett Packard 8564E (84125C) 1771 11-Nov-07 Purple Conducted Emissions - AC Power Ports, 16 Aug-07 Engineer: Rafael Veralas Manufacturer Description Model # Asset # Cal Due Elliott Laboratories LISN, FCC / CISPR LISN-3, OATS 304 18-Jul-08 8028-50-TS-24-BNC Solar Electronics LISN 904 19-Jan-08 support Test Receiver, 0.009-2750 Rohde & Schwarz ESN 1332 21-Nov-07 MHz Rohde& Schwarz Pulse Limiter ESH3 Z2 1398 05-Feb-08 Celltech Power Meter nused for power out measurement Conducted Emissions - RF Output power Engineer: Sean Johnstone Manufacturer Description Model # Asset # Cal Due 8652A Power Meter Serial Gigatronics 8652A # 00007 26 Mar 08 # 1835272 This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 7

FCC Part 15 / IC RSS-210 Certification Application Test Methods Unless otherwise noted in the specific test procedure, tests are 902 - 928 MHz Band Channel Freq( MHz ) performed at a low, middle and high channel band used by the Low 902.3 device. Unless otherwise noted, all testing was performed on these Mid 915.4 channels / frequencies. High 926.9 The device was running special diagnostic software to allow it to transmit random data on a particular channel indefinitely. This diagnostic software allowed the frequency hopping function to be disabled or enabled as tested required. The diagnostic software also allowed variation of the RF transmit power. The maximum power setting that allowed compliance with the radiated emissions requirements (determined during testing) will be programmed into the configuration firmware of the module. This will ensure compliance with the FCC / IC radiated emissions requirements. The tests listed below are performed using the basic “conducted” test setup shown below unless otherwise noted Part 15 Test 15.247(b)(2) RF Transmit power 15.247(a)(1)(i) Bandwidth 15.247(a)(1)(i) Number of hopping channels 15.247(a)(1) Channel Spacing 15.247(a)(1)(i) Time on channel Basic Conducted RF Bench Test Setup The bench top RF test setu0p is shown to the right. Unless otherwise noted, the support equipment for the bench tests is listed below. Coax Spectrum Analyzer USB EUT Laptop Support Equipment Description Model FCC ID or SN Manufacturer Power Cable number Laptop Satellite DOC Toshiba Laptop PS, unshielded This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 8

FCC Part 15 / IC RSS-210 Certification Application Test Results Detailed test procedures and test results are contained in the following sections. In cases where the test setup differs from the “Conducted RF Bench Top” test setup shown earlier, the test setup is also presented within that section of the test report. Test Conditions Temperature 23C Humidity: Approx 55% ATM pressure 1020 mBar Grounding: None Tested By David Waitt Date of Test: 2 July 2007 Test Reference Refer to individual test results Tested Freq Range Test dependent Test Voltage 120 VAC Modifications No internal modifications were made t the unit during he conducted testing. Some modification were made during the radiated emissions testing. This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 9

FCC Part 15 / IC RSS-210 Certification Application Maximum RF Power Output at Antenna Terminals Specifications: FCC Specification: Paragraph: 15.247(b)(2) IC Specification: RSS-210/6, A8.4(1) Procedure: The RF transmit power was measured with an AVG power meter. The unit was sequentially tuned to the test channels (Low, Mid and High) and configured to transmit random data (100% duty cycle). Results: Measured RF power levels are below. (Max EIRP dBm) Power Power Peak antenna (dBm) (mW) gain (0.8 dBi) LOW 4.05 2.54 4.85 MID 3.99 2.51 4.79 HIGH 4.25 2.66 5.05 20 dB Bandwidth Specifications FCC Specification: Paragraph 15.247(a)(1)(i) IC Specification: RSS-210 / 6 A8.1(3) Procedure: The 20 dB bandwidth was measured on the low middle and high channels of the 900 MHz band using the conducted RF test setup. The spectrum analyzer was configured for MAX HOLD and the trace allowed to stabilize. A peak search was performed and the then “Delta-Marker” used to locate the points at –20dB below the peak. The bandwidth test was performed at the power settings that will be used in the final system. Results: 20 dB BW (kHz) Spec (kHz) Delta (kHz) LOW 157.5 500 342.5 MID 152.5 500 347.5 HIGH 147.5 500 352.5 This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 10

FCC Part 15 / IC RSS-210 Certification Application 20 dB BW, LOW Channel This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 11

FCC Part 15 / IC RSS-210 Certification Application 20 dB BW, MID Channel 20 dB BW, HIGH channel This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 12

FCC Part 15 / IC RSS-210 Certification Application 900MHz Band Edge Specifications: FCC Specification: Paragraph 15.247(d) IC Specification: RSS-210/6 A8.5 Procedure: The test setup was configured as shown in the conducted test setup. The UUT was configured to continuously transmit random data on the low, and then the high test channel. The span of the analyzer was centered on the 902 and 928 MHz band edge respectively. The RBW & VBW were set to 100 kHz. The trace was allowed to stabilize then a Peak-search and a marker delta measurement to the band edge was performed to verify that the RF power at the band edge was at least 20 dB below the peak of the fundamental level. Results: Level at 902 MHz: -32.29dBc Spec -20 dBc Min Level at 928 MHz: -58.38dBc Spec -20 dBc Min 902 MHz Bandedge 928 MHz Bandedge This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 13

FCC Part 15 / IC RSS-210 Certification Application Radiated Emissions in Restricted Bands & Out of Band Radiated Emissions Specifications: FCC Specification: Paragraph 15.247(d) IC Specification: RSS-210 / 6 Sec 2.6 Procedure: This test was conducted inside a semi-anechoic chamber at BACL. The unit was placed on a rotating wooden table 80cm above the ground plane. A Horn antenna was secured to a mast 3 meter away. The unit was tested at each of the Low, Mid and High channels. The UUT was running in the diagnostic mode and set to transmit at maximum on each of the channels in turn. The test equipment was configured as shown below. The EUT was rotated 360 degrees and the height of the antenna adjusted from 1 to 4 meters above the ground plane to determine the maximum level of the emission. The level of the harmonic emission was measured in two modes, “Peak” and “Average” . The spectrum analyzer reading made by the test software and the appropriate correction factors (antenna factor, cable loss,...) were then applied by the test lab software to obtain a final corrected measurement. Preliminary emission scans were performed on the EUT in three orthogonal planes It was determined that the horizontal plane was the worst case. The final radiated emissions data was recorded with the EUT being vertical. (as shown below) Axis 2 positioning Axis 3 positioning Axis 1 Positioning, This was determined to be the worst case positioning. This is the axis used for obtaining the final data The data presented below was taken with the unit in the worst case position (vertical). This procedure was performed for all of the channels outlined in the Test Methods section of this report. This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 14

FCC Part 15 / IC RSS-210 Certification Application The band up to 10 GHz was examined. The table below indicates the harmonics that fall within restricted bands. RED indicates a harmonic that falls within a restricted band and is subject to 15.205. The harmonics in Green are NOT in restricted bands and are subject to 15.209 CHAN FUND 2 3 4 5 6 7 8 9 10 LOW 902.3 1804.6 2706.9 3609.2 4511.5 5413.8 6316.1 7218.4 8120.7 9023.0 MID 915.4 1830.8 2746.2 3661.6 4577.0 5492.4 6407.8 7323.2 8238.6 9154.0 HIGH 926.7 1853.4 2780.1 3706.8 4633.5 5560.2 6486.9 7413.6 8340.3 9267.0 15.205 Harmonic test tables Radiated Emissions in Restricted Bands Test conditions / Setup Support Equipment Description Model number FCC ID or SN Manufacturer Power Cable Laptop Satellite DOC Toshiba Laptop PS, unshielded Test Conditions Temperature 24 C Humidity: 73% ATM pressure 29.72 in Grounding: None Tested By Rafeal Veralas, Elliott Date of Test: July 2007 Test Reference FCC Part 15.205 IC Paragraph RSS210, 6.2.3 ( c ) Setup Method ANSI C63.4 Tested Range 1 GHz to 10GHz Test Voltage 3.6 VDC Modifications No modifications were made to the unit NOTES: For emissions in restricted bands, the limit of 15.209 was used. For all other emissions, the limit was set 20dB below the level of the fundamental. Restricted Band Peak Measurements: RBW = VBW = 1 MHz Restricted Band Average Measurements: RBW =1MHz and VBW=10 Hz. All other measurements, RBW = 1MHz and VBW = 3MHz, video averaging on (100 samples). Anechoic Chamber 3 meter 1-4 meters Test Tunrtable Control Laptop 80cm USB Control Cable Ground Plane Spectrum Band Analyzer Reject Control Computer This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 15

FCC Part 15 / IC RSS-210 Certification Application Results: EUT Transmitting on LOW channel, 902.3 MHz Frequency Level Pol 15.209 / 15.247 Detector Azimuth Height Comments MHz dBμV/m v/h Limit Margin Pk/QP/Avg degrees meters Non 1806.520 24.8 V 54.0 -29.2 AVG 60 1.0 Restricted Non 1806.520 41.1 V 74.0 -32.9 PK 60 1.0 Restricted Non 6316.000 38.2 V 54.0 -15.8 AVG 67 1.0 Restricted Non 6316.000 45.3 V 74.0 -28.7 PK 67 1.0 Restricted This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 16

FCC Part 15 / IC RSS-210 Certification Application EUT Transmitting on MID channel, 914.6 MHz Frequency Level Pol 15.209 / 15.247 Detector Azimuth Height Comments MHz dBμV/m v/h Limit Margin Pk/QP/Avg degrees meters Non 1828.260 23.8 V 54.0 -30.2 AVG 66 1.0 Restircted Non 1828.260 39.4 V 74.0 -34.6 PK 66 1.0 Restircted Non 1830.000 22.2 H 54.0 -31.8 AVG 66 1.0 Restircted Non 1830.000 33.4 H 74.0 -40.6 PK 66 1.0 Restircted Non 6402.130 41.3 V 54.0 -12.7 AVG 60 1.3 Restircted Non 6402.130 47.1 V 74.0 -26.9 PK 60 1.3 Restircted Non 6402.190 42.2 H 54.0 -11.8 AVG 106 1.1 Restircted Non 6402.190 47.6 H 74.0 -26.4 PK 106 1.1 Restircted This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 17

FCC Part 15 / IC RSS-210 Certification Application EUT Transmitting on HIGH channel, 926.9 MHz Frequency Level Pol 15.209 / 15.247 Detector Azimuth Height Comments MHz dBμV/m v/h Limit Margin Pk/QP/Avg degrees meters Non 1853.370 25.1 V 54.0 -28.9 AVG 61 1.0 Restricted Non 1853.370 42.6 V 74.0 -31.4 PK 61 1.0 Restricted Non 6488.300 48.9 V 54.0 -5.1 AVG 101 1.3 Restricted Non 6488.300 52.6 V 74.0 -21.4 PK 101 1.3 Restricted This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 18

FCC Part 15 / IC RSS-210 Certification Application Number of Hopping Channels Specifications: FCC Specification: Paragraph 15.247(a)(1)(i) IC Specification: RSS-210 / 6 A8.1(2) Procedure: The test setup is as shown in the Conducted RF bench setup. The EUT was configured to hop sequentially through all of its channels. (This is not possible with the normal operating code). The spectrum analyzer was set to MAX HOLD to capture the number of hopping channels. The entire 902 - 928 MHz band was examined in three sub-bands. 902 - 910 MHz, 910 - 920MHz and 920 - 928 MHz. The results are below. From to (MHz) Num of Results: (MHz) Channels All 83 hopping channels were recorded. 902 910 26 910 920 33 920 928 24 TOTAL 83 902 - 910 MHz (26 Chan) This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 19

FCC Part 15 / IC RSS-210 Certification Application 910 - 920 MHz (33Chan) 920 - 928 MHz (24Chan) This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 20

FCC Part 15 / IC RSS-210 Certification Application Channel Spacing Specifications: FCC Specification: Paragraph 15.247(a)(1) IC Specification: RSS-210 / 6 A8.1(2) Procedure: The test setup is as shown in the Conducted RF bench setup. The EUT was configured to hop sequentially through all of its channels. (This is not possible with the normal operating code). The spectrum analyzer was set to MAX HOLD to capture a few of the sequential channel frequencies. The spectrum analyzer markers were used to determine the channel spacing. The results are below. Results: Channel spacing was measured at 300kHz. The specification requires that the channel spacing be greater than the measured 20 dB BW. The 20 dB BW was measured at a maximum of 157.5 kHz. This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 21

FCC Part 15 / IC RSS-210 Certification Application 30MHz - 1 GHz Spurious Radiated Emissions Specification: FCC Specification: 15.109(f) IC Specification: RSS210 / 6 A8.5 Procedure: The test was configured as a standard ANSI C63.4 Class B radiated emissions test setup. The EUT was tested in both RCV and XMIT modes. The frequency range of 30 to 1000 MHz was scanned. Results: (RCV mode) The unit was set to receive only mode. Preliminary emissions were checked in all three orthogonal planes, the worst case results are presented. The unit was tested in Receive mode and transmit mode. This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 22

FCC Part 15 / IC RSS-210 Certification Application Maximized quasi-peak readings (includes manipulation of EUT interface cables) Frequency Level Pol EN 55022 Class B Detector Azimuth Height Comments MHz dBμV/m v/h Limit Margin Pk/QP/Avg degrees meters 30.920 21.5 V 30.0 -8.5 QP 182 1.0 167.814 21.0 V 30.0 -9.0 QP 189 1.0 134.688 19.0 V 30.0 -11.0 QP 132 1.0 46.156 18.5 V 30.0 -11.5 QP 0 1.0 84.638 16.5 H 30.0 -13.5 QP 198 4.0 491.595 20.0 V 37.0 -17.0 QP 206 1.0 This test report shall not be reproduced in part without the written approval of David Waitt or Silver Spring Networks. Reproduction of the report in its entirety is allowed. Page 23


Document Created: 2007-10-01 13:56:25
Document Modified: 2007-10-01 13:56:25
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