PRL-IWE1200Wireless Broadband Router

   

  











   


 


         
 
 

 

 

 
 

  


 

 



 




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American Telecommunications Certification Body Inc. 6731 Whittier Ave, McLean, VA 22101 November 19, 2001 RE: Interpoch Technology Inc. FCC ID: PRL-IWE1200 I have a few comments on this Application. 1.) The manual lacks required prohibitions for co-location of this transmitter with any other transmitter or antenna 2.) Please indicate where the RF section is located on the Schematic. 3.) Please indicate where the RF section is located on the Block Diagram. Thank you William H. Graff President and Examining Engineer mailto: [email protected] The items indicated above must be submitted before processing can continue on the above referenced application. Failure to provide the requested information may result in application termination. Correspondence should be considered part of the permanent submission and may be viewed from the Internet after a Grant of Equipment Authorization is issued. Please do not respond to this correspondence using the email reply button. In order for your response to be processed expeditiously, you must submit your documents through the AmericanTCB.com website. Also, please note that partial responses increase processing time and should not be submitted. Any questions about the content of this correspondence should be directed to the sender.

Page 1 ANNEX PHOTOGRAPHS OF EUT Page 2 Page 11

Page 3 Page 4

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FCC ID: PRL-IWE1200 ADT No.901015R02 Operational Description The transmitter of the EUT (Wireless Broadband Router) is powered by power adapter and connected with notebook through RJ45 port. The antenna is Dipole Antenna, the antenna connector is MMCX connector. For typical use, the user has to keep at least 20cm separation distance away from the radiator. For more detailed instruction, please take a look at the user’s manual. DSSS Information This device is Direct Sequence Spread Spectrum, the data is mixed by pseudorandom code which is an orthogonal code. The mixed data is digital modulated by BPSK and QPSK technique depends on the data rates. The CCK coding is applied for increasing the data rate, and also the processing gain will be increased. The bit rates are 1,2,5.5,11Mbps, the symbol rates are 1,1,1.375,1.375Mbps, the chip rates are always 11Mbps. So, the Chip/symbol is 11,11,8 and 8 respectively. Although the bit rate is higher, the processing gain is lower than 10, but the CCK coding used in higher bit rate will provide 2.2dB coding gain.

ADT Number: 901015R02 1 FCC TEST REPORT REPORT NO.: RF901015R02 MODEL NO.: IWE1200A ACCORDING: FCC Guidelines for Human Exposure IEEE C95.1 APPLICANT: Interepoch Technology Inc. ADDRESS: 7F, No. 3, Alley 6, Lane 235, Pao Chiao Rd., Hsin-Tien City, Taipei Hsien, Taiwan, R.O.C. ISSUED BY: Advance Data Technology Corporation LAB LOCATION: 47 14th Lin, Chiapau Tsun, Linko, Taipei, Taiwan, R.O.C. 0528 Lab Code: 200102-0 ADT Number: 901015R02 2 RF Exposure Measurement 1. Introduction 2.4 GHz frequency band is regarded specially as a dangerous band for its heating harmfulness to the human body. That’s why microwave oven is operating in this frequency band. The manufacturer whose product is working in this frequency band is obligatory to prove the harmfulness of his product. In this document, we try to prove the safety of radiation harmfulness to the human body for our product. The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The Gain of the antenna used in this product is measured in a Fully Anechoic Chamber (FAC) calibrated for antenna measurement in ADT, and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis transmission formula is a far field assumption, the calculated result of that is an over-prediction for near field power density. We will take that as the worst case to specify the safety range. 2. RF Exposure Limit According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Average Time (minutes) (A)Limits For Occupational / Control Exposures 300-1500......F/3006 1500-100,000......56 (B)Limits For General Population / Uncontrolled Exposure 300-1500......F/15006 1500-100,000......1.030 F = Frequency in MHz ADT Number: 901015R02 3 3. Friis Formula Friis transmission formula : Pd = (Pout*G) / (4*pi*r 2 ) where Pd = power density in mW/cm 2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd is the limit of MPE, 1 mW/cm 2 . If we know the maximum Gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Ref. : David K. Cheng, Field and Wave Electromagnetics, Second Edition, Page 640, Eq. (11-133). 4 EUT Operating condition The software provided by Manufacturer enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. 5 Climate Condition The temperature and related humidity: 30 deg. C and 60 % RH 6. Classification This device is not fixed inside the host equipment, it is connected with host through wire. So it is easy to be re-located in the place where at least 20 cm far away from the body of the user. Warning statement to the user for keeping at least 20cm or more separation distance with the antenna should be included in users manual. So, this device is classified as Mobile Device. ADT Number: 901015R02 4 7 Test Results 7.1 Antenna Gain The maximum Gain measured in Fully Anechoic Chamber is 0.5dBi or 1.12 (numeric). 7.2 Output Power Into Antenna & RF Exposure Distance : CHANNEL CHANNEL FREQUENCY (MHz) EIRP OUTPUT POWER TO ANTENNA (mW) MINIMUM ALLOWABLE DISTANCE ( r ) FROM SKIN (Centi-Meter) 1241264.862.40 6243763.682.38 11246265.462.38 The minimum allowable distance is very close to the enclosure of the antenna. So, the user has no need to worry about the harmfulness of radiation. But it is recommended to always keep, at least, 20 cm separation distance with the antenna.

FCC ID: PRL-IWE1200 Report No.: RF901015R02 1 Issued: Oct. 30, 2001 FCC TEST REPORT REPORT NO.: RF901015R02 MODEL NO.: IWE1200A RECEIVED: Oct. 15, 2001 TESTED: Oct. 18 ~ Oct. 24, 2001 APPLICANT: Interepoch Technology Inc. ADDRESS: 7F, No. 3, Alley 6, Lane 235, Pao Chiao Rd., Hsin-Tien City, Taipei Hsien, Taiwan, R.O.C. ISSUED BY: Advance Data Technology Corporation LAB LOCATION: 47 14th Ling, Chia Pau Tsuen, Linkou Hsiang, Taipei, Taiwan, R.O.C. This test report consists of 49 pages in total. It may be duplicated completely for legal use with the approval of the applicant. It should not be reproduced except in full, without the written approval of our laboratory. The client should not use it to claim product endorsement by CNLA, NVLAP or any government agencies. The test results in the report only apply to the tested sample. 0528 ILAC MRA Lab Code: 200102-0 FCC ID: PRL-IWE1200 Report No.: RF901015R02 2 Issued: Oct. 30, 2001 Table of Contents 1CERTIFICATION ...........................................................................................4 2SUMMARY OF TEST RESULTS...................................................................5 3GENERAL INFORMATION ...........................................................................6 3.1GENERAL DESCRIPTION OF EUT..............................................................6 3.2DESCRIPTION OF TEST MODES................................................................7 3.3GENERAL DESCRIPTION OF APPLIED STANDARDS ...............................7 3.4DESCRIPTION OF SUPPORT UNITS..........................................................8 4TEST TYPES AND RESULTS.......................................................................9 4.1CONDUCTED EMISSION MEASUREMENT ................................................9 4.1.1LIMITS OF CONDUCTED EMISSION MEASUREMENT.................................................... 9 4.1.2TEST INSTRUMENTS....................................................................................................... 9 4.1.3TEST PROCEDURES..................................................................................................... 10 4.1.4TEST SETUP .................................................................................................................. 10 4.1.5EUT OPERATING CONDITIONS..................................................................................... 11 4.1.6TEST RESULTS ..............................................................................................................12 4.2RADIATED EMISSION MEASUREMENT ...................................................18 4.2.1LIMITS OF RADIATED EMISSION MEASUREMENT ...................................................... 18 4.2.2TEST INSTRUMENTS..................................................................................................... 19 4.2.3TEST PROCEDURES..................................................................................................... 20 4.2.4TEST SETUP .................................................................................................................. 21 4.2.5EUT OPERATING CONDITIONS..................................................................................... 21 4.2.6TEST RESULTS ..............................................................................................................22 4.36DB BANDWIDTH MEASUREMENT ..........................................................27 4.3.1LIMITS OF 6dB BANDWIDTH MEASUREMENT.............................................................. 27 4.3.2TEST INSTRUMENTS..................................................................................................... 27 4.3.3TEST PROCEDURE........................................................................................................ 28 4.3.4TEST SETUP .................................................................................................................. 28 4.3.5EUT OPERATING CONDITIONS..................................................................................... 28 4.3.6TEST RESULTS ..............................................................................................................29 4.4MAXIMUM PEAK OUTPUT POWER ..........................................................33 4.4.1LIMITS OF MAXIMUM PEAK OUTPUT POWER MEASUREMENT ................................. 33 4.4.2INSTRUMENTS...............................................................................................................33 4.4.3TEST PROCEDURES..................................................................................................... 34 4.4.4TEST SETUP .................................................................................................................. 34 4.4.5EUT OPERATING CONDITIONS..................................................................................... 34 4.4.6TEST RESULTS ..............................................................................................................35 4.5POWER SPECTRAL DENSITY MEASUREMENT......................................36 4.5.1LIMITS OF POWER SPECTRAL DENSITY MEASUREMENT ......................................... 36 4.5.2TEST INSTRUMENTS..................................................................................................... 36 4.5.3TEST PROCEDURE........................................................................................................ 37 4.5.4TEST SETUP .................................................................................................................. 37 4.5.5EUT OPERATING CONDITION ....................................................................................... 37 4.5.6TEST RESULTS ..............................................................................................................38 4.6BAND EDGES MEASUREMENT ................................................................42 FCC ID: PRL-IWE1200 Report No.: RF901015R02 3 Issued: Oct. 30, 2001 4.6.1LIMITS OF BAND EDGES MEA…

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FCC ID: PRL-IWE1200 Report No.: RF901015R02 47 Issued: Oct. 30, 2001 5 PHOTOGRAPHS OF THE TEST CONFIGURATION CONDUCTED EMISSION TEST FCC ID: PRL-IWE1200 Report No.: RF901015R02 48 Issued: Oct. 30, 2001 RADIATED EMISSION TEST