PU-3 series test report
Contents
1. Class Radiated Emission limit at 3m ior others MHZ uV m Q P Above 1GHz for all device Frequency Class A dBuV m At 10m Class B dBuV m At 3m MHZ Average Peak Average Peak Above 1000 NOTE 1 The lower limit shall apply at the transition frequencies 2 Emission level dBuV m 20 log Emission level uV m 3 The measurement above 1GHz is at close in distances 3m and determine the limit L2 corresponding to the close in distance d2 by applying the following relation L2 L1 d1 d2 where L1 is the specified limit microvolts per metre uV m at the distance d1 10m L2 is the new limit for distance d2 3m So the new Class A limit above 1GHz at 3m is as following table Frequency Class A dBuV m At 3m MHZ Average Peak Above too e Page 13 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc Report No T120308N03 D According to FCC Part 15 33 b for an unintentional radiator including a digital device the spectrum shall be investigated from the lowest radio frequency signal generated or used in the device without going below the lowest frequency for which a radiated emission limit is specified up to the frequency shown in the following table Highest frequency generated or used in the Upper frequency of measuremen2. DATA SAMPLE eter uaa Ro natae RAE aca AXE 12 6 6 TEST RESULTS eene Hee etes Y LER p Doe Eua peed 12 7 RADIATED EMISSION MEASUREMENT eese eres esten teens tn en ane tn ense ne 13 7 1 LIMITS OF RADIATED EMISSION 5 13 7 2 TEST INSTRUMENTS rettet n aedem esee dese pace tetas ee ded 15 3 5 2 0 b e e de e re o RE tdt 16 4 45 2 17 for DATA SAMPLE oe redo ecc dee adu euet ecc dente du den 18 4 6 TEST RESULTS e e b red e e een 19 8 PHOTOGRAPHS OF THE TEST CONFIGURATION 23 APPENDIX 1 PHOTOGRAPHS OF EUT eiue re reete 85 A1 Page 3 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc PE Haas 1 TEST RESULT CERTIFICATION Product DC DC Converter Model PU 3 SERIES Brand DANUBE Applicant Danube Enterprise Co Ltd A2 No 255 Fengren Rd Renwu Dist Kaohsiung City 81452 Taiwan R O C Manufacturer Danube Enterprise Co Ltd A2 No 255 Fengren Rd Renwu Dist Kaohsiung City 81452 Taiwan R O C Tested March 19 2012 March 21 2012 S
3. P 5Vdc 600mA EUT Power Ratin 9 For model PUS 2415B3 I P 24Vdc O P 15Vdc 200mA Note Client consigns only two model samples to test Model Number PUS 0505B3 PUS 2415B3 Therefore the testing Lab just guarantees the unit which has been tested PARTNUMBERS STRUCTURE Model Name Difference PUv x1lx2x3x4 P Series Name PUv x1x2x3x4x5 zzz U Unregulated of output voltage SzSingle output DzDual output voltage 03 3 4 5V 05 8 5V 09 11 5V 12 14 5V 15 18V 19 24V x2 Output voltage 03 3 4 5V 05 8 5V 09 11 5V 12 14 5V 15 18V 19 24V x3 Difference Package XA4z Type of output power X5 Function zzz 0 9 A Z or blank for market purpose Page 5 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc PEN 3 TEST METHODOLOGY 3 1 DECISION OF FINAL TEST MODE The EUT was tested together with the above additional components and a configuration which produced the worst emission levels was selected and recorded in this report The test configuration modes are as the following Conduction Modes WA Radiation Modes Full Load 1 PUS 0505B3 2 PUS 2415B3 3 2 EUT SYSTEM OPERATION 1 Setup whole system for test as shown on setup diagram 2 Turn on power and check function 3 Startto test by test mode Page 6 This report shall n
4. Test Mode Full Load Environmental 554 6 58 RH Bandwidth 120 kHz MESSEN Antenna Antenna Pole Vertical Antenna Distance tom Detector Function Quasi peak Tested by NE Su The chart below shows the highest readings taken from the final data Data 1 80 Level dBuV m Date 2012 03 19 0 30 224 418 612 806 1000 Frequency MHz Reading Antenna Cable Measure Limit Over Detector Level Factor Loss Level I Limit I I MHz 1 dB m I dB dBuV m dBuV m dBuV m I 46 50 1 31 29 84 1 1 50 12 65 1 30 00 17 35 0 83 58 1 49 7 78 1 2 03 11 30 30 00 18 70 0 I 139 30 1 64 13 12 2 40 17 16 1 30 00 12 84 QP I 183 93 1 42 11 52 3 12 16 06 30 00 13 94 QP I 214 00 1 73 11 37 3 34 16 44 30 00 13 56 QP I 246 70 1 54 11 80 1 3 66 17 00 1 37 00 20 00 0 I Note 1 Quasi peak Reading 2 The other emission levels were very low against the limit Page 19 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc PE Hae Model No PUS 0505B3 Test Mode Full Load E 58 RH 6dB Bandwidth 120 kHz Conditions Antenna Pole Pole Antenna Pole Horizontai Antenna Distance Distance Hom Detector Function by a Su The chart below shows the highest r
5. which has a 12 mm non conductive covering to insulate the EUT from the ground plane Support equipment if needed was placed as per ANSI C63 4 All I O cables were positioned to simulate typical usage as per ANSI C63 4 The EUT received DC power source from the outlet socket under the turntable All support equipment power received from another socket under the turntable The antenna was placed at 3 or 10 meter away from the EUT as stated in ANSI C63 4 The antenna connected to the Spectrum Analyzer via a cable and at times a pre amplifier would be used The Analyzer Receiver quickly scanned from 30MHz to 40GHz The EUT test program was started Emissions were scanned and measured rotating the EUT to 360 degrees and positioning the antenna 1 to 4 meters above the ground plane in both the vertical and the horizontal polarization to maximize the emission reading level The test mode s described in Item 3 1 were scanned during the preliminary test After the preliminary scan we found the test mode described in Item 3 1 producing the highest emission level The worst configuration of EUT and cable of the above highest emission level were recorded for reference of the final test Procedure of Final Test EUT and support equipment were set up on the turntable as per the configuration with highest emission level in the preliminary test The Analyzer Receiver scanned from 30MHz to 40GHz Emissions were scanned and measured rotating t
6. 1 CISPR 16 1 2 CISPR 16 1 3 CISPR 16 1 4 and CISPR 16 1 5 5 2 ACCREDITATIONS Our laboratories are accredited and approved by the following accreditation body according to ISO IEC 17025 Taiwan TAF The measuring facility of laboratories has been authorized or registered by the following approval agencies Canada Industry Canada Germany TUV NORD Taiwan BSMI USA FCC Copies of granted accreditation certificates are available for downloading from our web site http www ccsrf com Page 8 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc TEN 5 3 MEASUREMENT UNCERTAINTY Where relevant the following measurement uncertainty levels have been estimated for tests performed on the EUT as specified in CISPR 16 4 2 Measurement Uncertainty Power Line Conducted Emission 9kHz 30MHz 2 90dB 30 MHz 200 MHz 3 76dB 200 MHz 1000 MHz 3 73dB Radiated Emission 30 MHz 200 MHz 3 60dB 1 Test Site 10m 200 MHz 1000 MHz 3 70dB 30 MHz 200 MHz 3 99dB 200 MHz 1000 MHz 3 31dB 30 MHz 200 MHz 3 38dB 200 MHz 1000 MHz 3 27dB Radiated Emission 30 MHz 200 MHz 3 59dB 3m 200 MHz 1000 MHz 3 27dB Test Site OATS 6 1000 MHz 6000 MHz 3 20dB This uncertainty represents an expanded uncertainty expressed at approximately the 95 confidence level using a coverage factor of k 2 Consistent with industr
7. 2 5 95 5 3 TEST 5 2509 i ae ek tn ae OIM CIR LUE Guo OU CO EE 6 3 1 DECISION OF FINAL TEST MODE 6 22 EUT SYSTEM EE m rannta 6 A SETUP OF EQUIPMENT UNDER TEST ierit s me ri i 7 4 1 DESCRIPTION OF SUPPORT UNITS eret aee eret Ee t ana 7 4 2 CONFIGURATION OF SYSTEM UNDER 7 5 FACILITIES AND ACCREDITATIONS eere eese esee eene estne seen ena ns tatus tns ta sns tneta 8 uM A 8 5 2 JACCBEDITATIONS iet ERR E rds 8 5 3 MEASUREMENT UNCERTAINTY ssseseseeenenenenenen nne nnnen enne ene n nnne innen seen nnne nenne nnns 9 6 CONDUCTED EMISSION 2 04044 0000 10 6 1 LIMITS OF CONDUCTED EMISSION 10 6 2 00 202 00 0 000 dinners 10 6 3 TEST PROCEDURES c sped ae EXC dena v HIR Cena 11 6 4 TEST SETUP 12 6 5
8. 2 30 00 12 78 QP I 190 38 0 13 11 98 1 3 15 15 26 30 00 14 75 QP I 224 65 2 01 11 04 3 45 16 50 30 00 13 50 QP l Note 1 QP Quasi peak Reading 2 The other emission levels were very low against the limit Above 1GHz X No applicable since the highest frequency of the internal sources of the EUT is less than 108MHz the measurement shall only be made up to 1 GHz Page 22 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc 8 PHOTOGRAPHS THE TEST CONFIGURATION RADIATED EMISSION TEST Page 23 This report shall not be reproduced except in full without the written approval of Compliance Certification Services
9. O Compliance Certification Services Inc FCC 47 CFR PART 15 SUBPART B TEST REPORT for DC DC Converter MODEL PU 3 SERIES BRAND DANUBE Test Report Number T120308N03 D Issued to Danube Enterprise Co Ltd A2 No 255 Fengren Rd Renwu Dist Kaohsiung City 81452 Taiwan R O C Issued by Compliance Certification Services Inc Tainan BU No 8 Jiucengling Xinhua Dist Tainan City 712 Taiwan R O C TEL 886 6 5802201 FAX 886 6 5802202 Issued Date March 30 2012 vn Lp WE Testing Laboratory ali yw 1109 Note This report shall not be reproduced except in full without the written approval of Compliance Certification Services Inc This document may be altered or revised by Compliance Certification Services Inc personnel only and shall be noted in the revision section of the document The client should not use it to claim product endorsement by TAF NIST or any government agencies The test results in the report only apply to the tested sample Page 1 23 O Compliance Certification Services Inc PEN Revision History 00 March 30 2012 Initial Issue Eva Lin Page 2 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc PE Haas TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION e eseseesosossesososeseseosososossosososesessosossssesososssesessosossesososesss 4
10. dBuV m Detector Freq Reading Antenna Factor Cable los Measure level Limit Over limit Emission frequency in MHz Uncorrected Analyzer Receiver reading Antenna Factor Cable s loss Reading Antenna Factor Cable loss Limit stated in standard Measure level Detector Peak PK Peak Reading QP AV Limit Quasi peak Reading Average Reading Calculation Formula Over limit dBuV m Result dBuV m Limit dBuV m Above 1GHz Freq Reading AF C loss Pre amp Filter Level Limit Margin Mark MHz dBuV dB dB dB dBuV m dBuV m dB P Q A XXXX XX 56 00 25 14 2 07 41 77 0 72 42 16 70 00 27 84 Freq Emission frequency in MHz Reading Uncorrected Analyzer Receiver reading AF Antenna Factor C loss Insertion loss of cable Pre amp Pre amplifier Gain Filter Insertion loss of filter Level Readind AF Closs Pre amp Fliter Limit Limit stated in standard Margin Reading in reference to limit Mark P Peak Reading Height Q Quasi peak Reading A Average Reading Antenna Height Calculation Formula Margin dB Level dBuV m Limit dBuV m Page 18 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc PEN 7 6 TEST RESULTS Below 1GHz Model No PUS 0505B3
11. e Ground Plan e For the actual test configuration please refer to the related item Photographs of the Test Configuration 6 5 DATA SAMPLE Meter Reading Level Detector dBuV dBuV Freq Emission frequency in MHz LISN Factor nsertion loss of LISN and Pulse Limiter Cable Loss Cable s loss LISN to EMI Tester Receiver Meter Reading Uncorrected Analyzer Receiver reading Measured Level Meter Reading LISN Factor Cable loss Limit Limit stated in standard Over Limit Measured Level Limits Detector Peak PK Peak Reading QP Quasi peak Reading AV Average Reading Calculation Formula 1 Measured Level dBuV LISN Factor dB Cable Loss dB Meter Reading dBuV 2 Over Limit dBuV Measured Level dBuV Limits dBuV 6 6 TEST RESULTS This EUT do not connect to AC Source directly Not applicability for this test Page 12 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc TAD 7 RADIATED EMISSION MEASUREMENT 7 1 LIMITS OF RADIATED EMISSION MEASUREMENT Below 1GHz for digital device dBuV m At 10m Class A Class B 30 230 40 30 230 1000 47 37 FREQUENCY MHz Limit tables for non digital device Class A Radiated Emission limit at 10m Hr others MHZ P P 30 88 88 216 960 Above 960
12. eadings taken from the final data Data 2 80 Level dBuV m Date 2012 03 19 30 224 418 612 806 1000 Frequency MHz Freq Reading Antenna Cable Measure Limit Over IDetector Level Factor Loss Level Limit MHz dBuV dB m I dB dBuV m dBuV m dBuV m l 55 88 1 47 7 66 1 62 10 75 30 00 19 25 QP I 84 45 1 23 7 75 2 04 11 02 1 30 00 18 98 0 I 121 18 1 28 13 74 1 2 50 17 51 30 00 12 49 0 I 150 90 1 31 12 70 2 69 16 69 1 30 00 13 31 QP I 222 03 1 72 10 91 1 3 42 16 05 1 30 00 13 95 QP I 248 60 1 24 11 83 1 3 68 16 75 1 37 00 20 25 QP I 1 Quasi peak Reading 2 The other emission levels were very low against the limit Page 20 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc PE Hae Model No PUS 2415B3 Test Mode Full Load 58 RH 6dB Bandwidth 120 kHz Conditions Antenna Pole Pole Antenna Pole Antenna Distance Distance Hom Detector Function e ER by a Su The chart below shows the highest readings taken from the final data Data 2 80 Level dBuV m Date 2012 03 19 0 30 224 418 612 806 1000 Frequency MHz Freq Reading Antenna Cable Measure Limit Over Detector Level Factor Los
13. he EUT to 360 degrees varying cable placement and positioning the antenna 1 to 4 meters above the ground plane in both the vertical and the horizontal polarization to maximize the emission reading level Recording at least the six highest emissions Emission frequency amplitude antenna position polarization and turntable position were recorded into a computer in which correction factors were used to calculate the emission level and compare reading to the applicable limit Below 1GHz the Q P reading and above 1GHz the Peak and Average reading are presented The test data of the worst case condition s was recorded Page 16 This report shall not be reproduced except in full without the written approval of Compliance Certification Services C Compliance Certification Services Inc PEN 7 4 TEST SETUP Below 1GHz Test table amp Turntable 1 4 Ed Coaxial Power Cable 10mor3m To Power Source Ground Plane EMI Receiver e For the actual test configuration please refer to the related item Photographs of the Test Configuration Filter Above 1GHz Page 17 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc 7 5 DATA SAMPLE Below 1GHz Reading Antenna fou dBuV m Measure level dBuV m Limit dBuV m Report No T120308N03 D Over limit
14. lane support equipment power by from a second LISN The test program of the EUT was started Emissions were measured on each current carrying line of the EUT using an EMI Test Receiver connected to the LISN powering the EUT The Receiver scanned from 150kHz to 30MHz for emissions in each of the test modes During the above scans the emissions were maximized by cable manipulation The test mode s described in Item 3 1 were scanned during the preliminary test After the preliminary scan we found the test mode described in Item 3 1 producing the highest emission level The worst configuration of EUT and cable of the above highest emission level were recorded for reference of the final test Procedure of Final Test EUT and support equipment were set up on the test bench as per the configuration with highest emission level in the preliminary test A scan was taken on both power lines Line 1 and Line 2 recording at least the six highest emissions Emission frequency and amplitude were recorded into a computer in which correction factors were used to calculate the emission level and compare reading to the applicable limit The test data of the worst case condition s was recorded Page 11 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc PEN 6 4 TEST SETUP Vertical Reference EMI Test Receiver Referenc
15. n Due SCHWARZBECK NNLK 8130 8130124 Sep 25 2012 Rohde amp Schwarz ESH 3 Z5 840062 021 Aug 02 2012 TEST RECEIVER Rohde Rohde amp Schwarz Schwarz ESCS 30 100348 JUL 03 2012 03 2012 BNC COAXIAL 50 30 2012 CABLE e 3 5 042116 Test S W R amp S 2 27 NOTE 1 The calibration interval of the above test instruments is 12 months and the calibrations are traceable to NML ROC and NIST USA 2 N C R No Calibration Request Page 10 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc PEN 6 3 TEST PROCEDURES P rocedure of Preliminary Test The EUT and support equipment if needed were set up as per the test configuration to simulate typical usage per the user s manual When the EUT is a tabletop system a wooden table with a height of 0 8 meters is used and is placed on the ground plane as per ANSI C63 4 see Test Facility for the dimensions of the ground plane used When the EUT is a floor standing equipment it is placed on the ground plane which has a 12 mm non conductive covering to insulate the EUT from the ground plane All I O cables were positioned to simulate typical actual usage as per ANSI C63 4 The test equipment EUT installed by DC main power through a Line Impedance Stabilization Network LISN which was supplied power source and was grounded to the ground p
16. ot be reproduced except in full without the written approval of Compliance Certification Services C Compliance Certification Services Inc PEN 4 SETUP OF EQUIPMENT UNDER TEST 4 1 DESCRIPTION OF SUPPORT UNITS The EUT has been tested as an independent unit together with other necessary accessories or support units The following support units or accessories were used to form a representative test configuration during the tests Peripherals Devices Produt Model No Certify No Signal cable DC power supply LOKO DPS 5050 Doc Power cable unshd 1 6m No Sinai cable description Note 1 All the equipment cables were placed in the worst case configuration to maximize the emission during the test 2 Grounding was established in accordance with the manufacturer s requirements and conditions for the intended use 4 2 CONFIGURATION OF SYSTEM UNDER TEST DC power supply Load Page 7 This report shall not be reproduced except in full without the written approval of Compliance Certification Services C Compliance Certification Services Inc PEN 5 FACILITIES AND ACCREDITATIONS 5 1 FACILITIES All measurement facilities used to collect the measurement data are located at CCS Taiwan Tainan BU at No 8 Jiucengling Xinhua Dist Tainan City 712 Taiwan R O C The sites are constructed in conformance with the requirements of ANSI C63 4 and CISPR Publication 22 All receiving equipment conforms to CISPR 16 1
17. s Level Limit I MHz dBuV dB m I dB dBuV m dBuV m dBuV m I 46 95 1 01 9 84 1 1 50 12 35 1 30 00 17 65 QP I 72 15 2 33 8 16 1 84 12 33 1 30 00 17 67 QP I 120 60 1 80 13 77 1 2 50 18 07 1 30 00 11 93 QP I 183 60 1 26 11 44 1 3 12 15 81 30 00 14 19 QP I 229 95 1 50 11 26 1 3 50 16 25 30 00 13 75 QP I 251 48 1 14 11 88 1 3 71 16 73 1 37 00 20 27 QP I Note 1 Quasi peak Reading 2 The other emission levels were very low against the limit Page 21 This report shall not be reproduced except in full without the written approval of Compliance Certification Services O Compliance Certification Services Inc M Model No PUS 2415B3 Test Mode Full Load bdeg C 58 RH Bandwidth 120 kHz Conditions Detector Function Quasi peak Tested by Shiang Su The chart below shows the highest readings taken from the final data Data 1 80 Level dBuV m Date 2012 03 19 40 0 30 224 418 612 806 1000 Frequency MHz Freq Reading Antenna Cable Measure Limit Over IDetector 1 Level Factor Loss Level Limit MHz dBuV dB m dBuV m dBuV m dBuV m 47 45 1 08 9 44 1 1 50 12 02 30 00 17 98 QP I 57 93 0 26 7 46 1 1 66 9 38 1 30 00 20 62 QP I 78 78 1 45 7 94 1 1 96 11 35 30 00 18 65 QP I 142 18 1 73 13 01 1 2 47 17 2
18. t range device or on which the device operates or MHz tunes MHz Below 1 75 30 1 75 108 1000 108 500 2000 500 1000 5000 5 harmonic of the highest frequency or 40GHz whichever is lower Above 1000 Page 14 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc TEN 7 2 TEST INSTRUMENTS Open Area Test Site 7 TEST RECEIVER Rohde amp Schwarz ESCS 30 100343 DEC 06 2012 TYPE N COAXIAL SUHNER RG 214 U 2X 7 NOV 24 2012 CABLE Test Software EMI e 3 AUDIX 5 04211 Above 1GHz Used E INSTRUMENT RF Swicth ERS 180A EC1204141 N C R TELH LTD Test Software e 3 5 043036 NOTE 1 The calibration interval of the above test instruments is 12 months and the calibrations are traceable to NML ROC and NIST USA 2 N C R No Calibration Request Page 15 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc PEN 7 3 TEST PROCEDURES P rocedure of Preliminary Test The equipment was set up as per the test configuration to simulate typical usage per the user s manual When the EUT is a tabletop system a wooden turntable with a height of 0 8 meters is used which is placed on the ground plane When the EUT is a floor standing equipment it is placed on the ground plane
19. tandard Item Result Remarks Conducted Power Port PASS No Requirement for DC device FCC 47 CFR Part 15 Subpart B ICES 003 Issue 4 Radiated Below 1GHz Meet Class B limit ANSI C63 4 2003 Radiated Above 1GHz No Requirement Note 1 The statements of test result on the above are decided by the request of test standard only the measurement uncertainties are not factored into this compliance determination 2 The information of measurement uncertainty is available upon the customer s request Deviation from Applicable Standard None The above equipment has been tested by Compliance Certification Services Inc and found compliance with the requirements set forth in the technical standards mentioned above The results of testing in this report apply only to the product system which was tested Other similar equipment will not necessarily produce the same results due to production tolerance and measurement uncertainties Approved by Reviewed by Jeter Wu Eric Huang Assistant Manager Assistant Section Manager Page 4 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc 2 EUT DESCRIPTION Report No T120308N03 D Applicant Danube Enterprise Co Ltd Monutacture Danube Enterprise Co Ltd Identify Number T120308N03 Received Date March 08 2012 For model PUS 0505B3 I P 5Vdc O
20. y standard e g CISPR 22 2005 clause 11 Measurement Uncertainty determining compliance with the limits shall be base on the results of the compliance measurement Consequently the measure emissions being less than the maximum allowed emission result in this be a compliant test or passing test The acceptable measurement uncertainty value without requiring revision of the compliance statement is base on conducted and radiated emissions being less than Ucispr which is 3 6dB and 5 2dB respectively CCS values called 4 in CISPR 16 4 2 is less than Ucispr as shown in the table above Therefore MU need not be considered for compliance Page 9 This report shall not be reproduced except in full without the written approval of Compliance Certification Services Compliance Certification Services Inc 6 CONDUCTED EMISSION MEASUREMENT Report No T120308N03 D 6 1 LIMITS OF CONDUCTED EMISSION MEASUREMENT Class A dBuV Class B dBuV FREQUENCY MHz NOTE 1 The lower limit shall apply at the transition frequencies 2 The limit decreases in line with the logarithm of the frequency in the range 0 15 to 0 50 MHz 3 All emanations from a class A B digital device or system including any network of conductors and apparatus connected thereto shall not exceed the level of field strengths specified above 6 2 TEST INSTRUMENTS Conducted Emission room 1 Name of Equipment Manufacturer Model Serial Number Calibratio
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