NM5-C111EOutdoor Spread Spectrum Transmission System

Model AMP2440 REMOTE BI-DIRECTIONAL POWER AMPLIIERS OR 2.4 GHz Installation and Operation Manual Version 2.0 May 2000 MODEL AMP2440 POLE MOUNTED BI-DIRECTIONAL POWER AMPLIIERS OR 2.4 GHz Installation and Operation Manual Ver 2.3Jan 2001 Young Design Inc 146B Hillwood Ave. alls Church, VA 22046 Tel: (703) 237-9090 ax: (703) 237-9092 http://www.ydi.com Y our One Shop or Complete High-Speed Wireless Internet Systems!!! www.ydi.com or Contact Our Sales Department Toll ree at: 888-297-9090 703-237-9090 or call Limited Warranty Young Design, Inc. (YDI) warrants that your device is free of defects in material and workmanship for a period of one year after initial purchase. YDI will, in this period of time, repair or replace, any YDI product returned to the factory, freight prepaid. The YDI warranty covers repairs or replacement (at YDI’s option) of the product only. YDI is not responsible for the cost of removal, reinstallation, or shipping to the place of repair. YDI does not extend or modify its warranty period as a result of repair or replacement. YDI reserves the right to void a warranty and/or make reasonable charges for the repair of a unit if the warranty seal is broken or the unit displays evidence of misuse, abuse, or tampering. YDI is not responsible for damage to any other equipment or property, or any other consequential or incidental damages of any kind, whether based on contract, negligence, or strict liability. Maximum liability shall not in any case exceed the purchase price of the unit. Warranties give you (the buyer) specific legal rights. You may also have other rights that vary from state to state. This warranty is only extended to purchases made in the United States of America or its possessions. Warranty Notice The AMP2440 warranty is null and void if any of the following occurs: 1. The amplifier is opened 2. The antenna connections are not properly waterproofed 3. The amplifier is operated with no antenna attached 4. Improper connectors are used 5. The amplifier is mounted outdoors with the connectors facing any direction except downwards This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. © 2000 Young Design, Inc. All Rights Reserved. No part or parts of this document may be reproduced, translated, stored in any electronic retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Young Design, Inc. To see a complete line of our High Speed Wireless Data products, visit our web site at: www.ydi.com or call our Sales Office at: 1-888-297-9090 TABLE O CONTENTS 1. DESCRIPTION............................................................................................................1 2. AMPLIFIER FEATURES............................................................................................1 2.1 GENERAL SPECIFICATIONS...............................................................................2 3. AMPLIFIER KIT..........................................................................................................3 4. INSTALLATION AND CABLING INSTRUCTIONS...........................................3 5. AMPLIFIER CONNECTIONS AND INDICATORS.............................................5 6. DC POWER INJECTOR OPERATION..................................................................5 7. DC POWER INJECTOR CONNECTIONS AND INDICATORS.......................6 8. POWER SUPPLY........................................................................................................6 9. OPERATION................................................................................................................7 TABLE A - CONVERSIONS FROM DBM TO WATTS...........................................8 TABLE B - TYPICAL CABLE ATTENUATION VALUES........................................8 TABLE C - TYPICAL AMPLIFIER INSTALLATION DETAILS.............................9 APPENDIX A: CALCULATING POWER..................................................................10 APPENDIX B: FCC PART 15 CERTIFIED SYSTEMS............................................11 Professional Installation Required The amplifier and antennas used must be professionally installed by experienced antenna installation professionals who are familiar with RF issues (such as gains and losses) as well as local building and safety codes. Failure to do so will void the product warranty and may expose the end user to excessive Radio Frequency hazard. Regulations regarding maximum antenna gains, amplifier power gain, and maximum permissible exposure vary from country to country. It is the responsibility of the end user to operate within the limits of these regulations and to ensure that the professional installers who install this device are aware of these regulations. All antennas are intended to be installed outdoors. Page 15 NOTES: 1. Description The AMP2440 is a bi-directional amplifier designed for extending the range of 2.4 GHz wireless radio modems, Wireless LAN cards, Access Points and wireless bridges. The units provide transmit power amplification as well as receive signal gain. The amplifier is installed right at the antenna’s feed point, providing maximum effectiveness of transmit power. This has the effect of compensating for signal loss in the transmitter cable to the antenna. Likewise, the Low Noise Amplifier (LNA) in the AMP2440 boosts the receive signal right at the antenna prior to experiencing the loss in the transmission cable to the radio. This gain completely overcomes the losses in the transmission cable between the amplifier and the radio. This results in the lowest possible system Noise Figure. In fact, use of the amp will actually increase the receiver sensitivity by a few dB! The ultima…

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Dear Mr. Graff: This is in response to your comments dated January 13, 2001. 1- The photos were taken in accordance to procedures. However, we are setting up the system again and photos shall be submitted no later than Saturday, January 20, 2001 4- Attached is the RF Exposure statement for Nokia Card. 5- The band edge plots are shown on page 16 of the FCC Report. These plots are antenna conducted output. The restricted band at 2483.5 shows no emission level measurable. Therefore no radiated data is provided. The lower Band edge plots shows about 40 dB down from the carrier with 100 kHz resolution bandwidth on the spectrum analyzer. Best regards, Brian

American Telecommunications Certification Body Inc. 6731 Whittier Ave, McLean, VA 22101 January 13, 2001 Bryan, A couple of things I have noticed on the application you have just uploaded on behalf of Young Design. 1.) Please provide test setup photos showing the actual test configurations for radiated and AC conducted emissions. Radiated photos should be on an OATS and show the positioning of measurement antenna, EUT antenna, power and peripheral cords, and LISN. A minimum of two shots (front and back) is expected. For AC conducted emissions, photos should also show front and back of test setup, and it's interconnection to LISN. Since photos of all antenna configurations have already been supplied, only the "worst case" antenna/amp combination need be supplied. 2.) There are no block diagrams supplied. 3.) Processing gain is missing. This office approved the original Nokia ORE-C110-C111 approval several months ago, but if there are expectations that we can supply test exhibits or any other data, we must have explicit permission from Nokia on their company letterhead. 4.) There is no RF exposure evaluation broken out separately from the report. This has it's own "bucket" at the FCC, and should always be broken out as a separate document per instructions in the AmericanTCB Certification procedures. 5.) There appears to be no data showing compliance with the band edges at the restricted bands of 15.205 (band edge data) corrected to the measurement bandwidths of 15.35. Please identify the FCC measurement procedure used. Bill Graff AmericanTCB William H. Graff Examining Engineer Vice President of Engineering The items indicated above must be submitted before processing can continue on the above referenced application. Failure to provide the requested information within 30 days of the original e-mail date may result in application dismissal pursuant to Section 2.917(c). 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 reply to this correspondence using the email reply button. In order for your response to be processed expeditiously, you must attach your answers to email correspondence. Reply to the examiner at the email address shown below. 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 e-mail address listed below the name of the sender.

EXTERNAL PHOTO 2.4 GHz Bi-Directional Amplifier Front View

EXTERNAL PHOTO DC Power Injector Front View

COMPANY NAME: NOKIA WIRELESS BUSINESS COMMUNICATIONS EUT: NOKIA C110 AND C111 CLIENT REFERENCE NUMBER: QUOTE NUMBER WORK ORDER NUMBER: 2000156 FCC ID: ORE-C110-C111 FCC Certification for Direct Sequence Spread Spectrum Page 67 of 207 APPENDIX H: EUT EXTERNAL PHOTOGRAPHS COMPANY NAME: NOKIA WIRELESS BUSINESS COMMUNICATIONS EUT: NOKIA C110 AND C111 CLIENT REFERENCE NUMBER: QUOTE NUMBER WORK ORDER NUMBER: 2000156 FCC ID: ORE-C110-C111 FCC Certification for Direct Sequence Spread Spectrum Page 68 of 207 Top of EUT ( Internal Antenna) Bottom of EUT (Internal Antenna)

INTERNAL PHOTO 2.4 GHz Bi-Directional Amplifier Front View

INTERNAL PHOTO 2.4 GHz Bi-Directional Amplifier Rear View

INTERNAL PHOTO DC Power Injector Front View

INTERNAL PHOTO DC Power Injector Rear View

Amplifier Circuit Description Amplifier Module The model AMP2440 is a bi-directional amplifier intended for use in the 2.4 GHz band. The amplifier features automatic transmit/receive switchover, low noise receive amplification and GaAs MMIC transmit amplification. Power is supplied through the coaxial cable via a DC injector. All internal voltages are regulated. During receive operation, signal from the antenna is routed through an RF switch to a bandpass filter whose response is optimized for the 2.4 GHz ISM band. RF signal from the filter is sent to a low noise amplifier (LNA). Receive gain may be adjusted by a fixed factory selected attenuator, which follows the LNA. The signal is then sent to another RF switch, and then to the coaxial cable (to the DC injector and radio). In the transmit direction, signal from the radio is fed into an RF switch and then to the power amplifier MMIC. Transmit gain is factory adjusted by a variable attenuator. This insures that each amplifier has a consistent transmit power gain regardless of the normal variation found in the power amp IC. RF input signals at the “To Radio” connector is sampled by an RF detection circuit which determines the presence of RF and activates the power amplifier appropriately. All receive circuitry is shut down while the power amplifier is activated. The amplified transmit signal if filtered by a n=5 low pass filter, and then is sent to the antenna RF switch. Direct Ground lightning and surge protection is provided at the antenna connector. Tx Power Sense TO RADIO DC Power Supply 12 V DC Rx Tx Tx Amp Rx Amp Bandpass Filter Tx TO ANTENNA Model 2440 Functional Block Diagram RF Rx DC Injector The DC Injector feeds power to the amplifier through the RF coaxial cable, eliminating the need for a separate power cable. The RF path in the DC injector is straight through, with only a "DC block" at the input connector. DC power is fed to the output connector through a decoupling network and is protected by a resettable fuse. DC current is sampled and associated circuitry determines whether the system is in the transmit or receive mode and appropriate LED indicators are illuminated.

RF EXPOSURE STATEMENT Notice in Installation Manual: FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment, when installed as directed. This equipment should be installed and operated with fix-mounted antennas that are installed with a minimum of 2 meters of separation distance between the antenna and all persons’ body during normal operation. RF Exposure Calculations: The following information provides the minimum separation distance for the highest gain antenna provided with the the Nokia C111,Wireless LAN Card with Model AMP2440-RxF Amplifier, as calculated from FCC OET 65 Appendix B, Table 1B Guidlines for General Population/Uncontrolled Exposure. This calculation is based on the highest EIRP possible from the system, considering maximum power and antenna gain, and considering a 1.0 mW/cm^2 uncontrolled exposure limit. The Friss formula used was: S = (Po*G) / (4*Pi*r^2) or r = (Po*G) / (4*Pi*S) Where S = 1.0 mW/cm^2 for 2400 MHz Where Po = 250 mW (Peak RF) Where G = Isotropic antenna gain (numeric) Where r = Minimum Safe Distance from antenna (cm) For: 24 dBi Grid Dish Antenna - Lucent or YDI models ...... r = 71 cm

R R R F F F M M M e e e a a a s s s u u u r r r e e e m m m e e e n n n t t t R R R e e e p p p o o o r r r t t t P P P r r r e e e p p p a a a r r r e e e d d d b b b y y y : : : N N N a a a t t t i i i o o o n n n a a a l l l C C C e e e r r r t t t i i i f f f i i i c c c a a a t t t i i i o o o n n n L L L a a a b b b o o o r r r a a a t t t o o o r r r y y y 8370 Court Avenue, Suite B-1 Ellicott City, Maryland 21043 (410) 461-5548 I I I n n n S S S u u u p p p p p p o o o r r r t t t o o o f f f : : : F F F o o o r r r : : : Young Design, Inc. 308 Hillwood Avenue Falls Church, Virginia 22046 Model: Nokia C111 WLAN Card with AMP2440-xxF Amplifier FCCID: NM5-C111E Demonstration of Compliance with FCC Rules Part 15.247 December 23, 2000 FCC APPLICATION FOR CERTIFICATION FCC ID: NM5-C111E 1 TABLE OF CONTENTS 1.0Introduction 1.1Summary 2.0Description of Equipment Under Test (EUT) 2.1EMI Countermeasure 3.0Test Program 4.0 Test Configuration for Antenna Terminal Conducted 5.0Test Configuraton for A.C. Conducted and Radiated 6.0A.C. Conducted Emissions Scheme 7.0Radiated Emissions Scheme TABLES Table 1.EUT Optional Antennas/Accessories Table 2.Support Equipment Table 3.Measurement Equipment RF Exposure Statement EXHIBITS Exhibit 1.EUT Photographs Exhibit 2.Schematic Diagram Exhibit 3.User Manual NCL PROJ.# Young-560 FCC ID: NM5-C111E 2 1.0 Introduction: This report has been prepared on behalf of Young Design, Inc., to support the attached Application for a Certification of a Part 15 Spread Spectrum Transmitter. The Equipment Under Test (EUT) was the Nokia C111 WLAN Card with Model AMP2440-xxF Amplifier. Radio-Noise Emissions tests were performed according to FCC Public Notice 54797, titled “Guidance on Measurement for Direct Sequence SST”. The measuring equipment conforms to ANSI C63.2 Specifications for Electromagnetic Noise and Field Strength Instrumentation. Testing was performed at National Certification Laboratory in Ellicott City, MD. Site description and site attenuation data have been placed on file with the FCC’s sampling and Measurements Branch. FCC acceptance was granted on May 26, 1993. 1.1 Summary: The Young Design, Inc., Nokia C111 WLAN Card with Model: AMP2440-xxF Amplifier, and a suite of specific antennas complies with the FCC limits (15.247) for a Direct Sequence SST. Tests were performed on IEEE 802.11 radio channels 1, 6, and 11. These are referred to in the report as the low, mid and high channels respectively. 2.0 Description of Equipment Under Test (EUT): The Nokia C111 WLAN Card is currently Certified with FCCID: ORE-C110-C111. Young Design, Inc. has not modified this product in any manner except for the addition of high gain antennas, and an external amplifier. Professional Installation Requirement: The amplifier unit incorporates a standard N connector to the antenna, therefore requiring professional installation. The User Manual specifies that only trained certified technicians should install the AMP2440-xxF Amplifier. There are many technical steps needed to install an operating system as outlined in the manual. These include antenna support structure, site survey, antenna alignment, test, and troubleshoot. All systems sold to businesses are installed under the supervision of Young Design, Inc. Marketing is limited to sales by authorized dealers. FCC ID: NM5-C111E 3 The EUT features: 2.1 EMI Countermeasure: The following modifications were made to the EUT, by the project engineer to assure compliance to specifications: None. 3.0 Test Program: This report contains measurement charts and data as evidence for the following tests performed: 1.(15.247b) Peak RF output power. 2. (15.247c) Field Strength of harmonics and spurious out-of-band emissions. 3. (15.247c) RF Antenna Conducted output of harmonics and spurious out-of-band emissions. 4. (15.247a) 6 dB Emission Bandwidth. Direct Sequence Spread Spectrum Modulation 24 dBm Peak RF Output 2412 to 2462 MHz Frequency Range 10 MHz 6 dB Emission Bandwidth 11 Available Channels 5 MHz Channel Separation 11 Mbps Data Rate (Radio Link) FCC ID: NM5-C111E 4 5. (15.207 A.C. Power Line Conducted emissions. 6. (15.247c) Band Edge emissions. 7. (15.247d) Power Spectral Density 4.0 Test Configuration for Antenna Terminal Conducted: The PCM wireless LAN card was installed in a notebook computer for testing. A WIN98 program is used to control the transmitter. The external amplifier is connected in-line between the wireless LAN card and antenna via 50 feet of 3/8 inch low-loss cable. This has insertion loss of 3.3 dB at 2450 MHz. The Installation Manual will specify that the coax cable between the D.C. Injector and amplifier must have at least 3.3dB loss if other than 3/8 inch low-loss cable is used. The 50 foot cable is the minimum length of 3/8 inch cable to be supplied with the system. RF power output measurements were taken with a Peak RF power meter at the amplifier antenna connector. RF antenna conducted output tests such as Bandwidth, Spurious/Harmonics, and Power Spectral Density were taken with the amplifier antenna connector feeding directly into the spectrum analyzer via external 30 dB attenuator. The analyzer’s internal attenuator was adjusted to prevent overloading of the front end. All four data bit-rates were checked to determine if variations in Power, Bandwidth, Bandedge, and Power Spectral Density levels were measured. The worse-case data rate was 11 Mbps, thus charts and tables given in this report, reflect this mode. Field strength measurements were taken both with the amplifier in-line, and subsequently with just the wireless LAN card feeding a grid dish, panel, or omni antenna aimed at the receiving antenna. Testing was performed using the highest gain antenna from each design family (grid, panel, omni) in order to cover the worst case range of combinations. A list of all antennas and suggested cables that will be sold with the EUT is provided in Table 1. FCC ID: NM5-C111E 5 PEAK POWER TEST RESULTS Limit:1 watt (…

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CONFIDENTIAL 1 (9) Nokia Mobile Phones 2000-09-14 Theoretical processing gain of Nokia C110 and C111 Wireless LAN Cards Nokia C110 and C111 Wireless LAN cards have been based on Intersil Chipset called Prism98 (II). Following main components have been used: 1. HFA3845 Media Access Processor 2. HFA3861B Digital Sequence Spread Spectrum Baseband Processor Because similar basic construction has been used, theoretical processing gain evaluation of Intersil standard design solution can be used also for Nokia C110 and C111 Wireless LAN Cards. intersil PRISM II radio Jamming Margin Test intersil Page 2 Testing for compliance with FCC rules 15-247e Carl Andren intersil Corporation January 11, 2000 [email protected] 321-724-7535 Scope This report presents the test procedure, test configuration and test data associated with a FCC Part 15.247 (e) Jamming Margin test for the indirect measurement of processing gain. Applicable Reference Documents. 1. “Operation within the bands 902-928 MHz, 2400-2483.5, and 5725-5850 MHz” Title 47 Part 15 section 247 (e) Code of Federal Regulations. (47 CFR 15.247). 2. “Report and Order: Amendment of Parts 2 and 15 of the Commission’s Rules Regarding Spread Spectrum Transmitters. Appendix C: ‘Guidance on Measurements for Direct Sequence Spread Spectrum Systems” FCC 97-114. ET Docket No. 96-8, RM-8435, RM-8608, RM-8609. 3. “HFA3861A Direct Sequence Spread Spectrum Baseband Processor” Harris Corporation Semiconductor Sector Preliminary Data Sheet, Melbourne FL, July 1999. 4. “ M-ary Orthogonal Keying BER Curve”, Test Background and Procedure. According to FCC regulations [1], a direct sequence spread spectrum system must have a processing gain, G p of at least 10 dB. Compliance to this requirement can be shown by demonstrating a relative bit-error-ratio (BER) performance improvement (and corresponding signal to noise ratio per symbol improvement of at least 10 dB) between the case where spread spectrum processes (coding, modulation) are engaged relative to the processes being bypassed. In some practical systems, the spread spectrum processing cannot simply be bypassed. In these cases, the processing gain can be indirectly measured by a jamming margin test [2]. In accordance with the new NPRM 99-231, if the vendor has a system with less than 10 chips per symbol, the CW intersil PRISM II radio Jamming Margin Test intersil Page 3 jamming results must be supported by a theoretical explanation of the system processing gain. Theoretical calculations The processing gain is related to the jamming margin as follows [2]: system output p L S J N S G+       +       = Where BER REFERENCE is the reference bit error ratio with its corresponding, theoretical output signal to noise ratio per symbol, (S/N) output , (J/S) is the jamming margin (jamming signal power relative to desired signal power), and L system are the system implementation losses. The maximum allowed total system implementation loss is 2 dB. The HFA3861A direct sequence spread spectrum baseband processor uses CCK modulation which is a form of M-ary Orthogonal Keying. The BER performance curve is given by [5]: “ The probability of error for generalized M-ary Orthogonal signaling using coherent demodulation is given by: PPQz E z dz ec b M S N =− =−−+               −       − − ∞ ∫ 11 1 2 212 2 1 2 1 2 01 0 π η ()exp This integral cannot be solved in closed form, and numerical integration must be used. There are error rate extensions for differential decoding and descrambling that are also to be accounted for. This is done in a MATHCAD environment and is displayed in graphical format below. intersil PRISM II radio Jamming Margin Test intersil Page 4 1.1 1000 byte PER vs. Es/No 15.51616.517 10 -2 10 -1 10 0 11 Mbps CCK in Thermal Noise Es/No (dB) 1000 byte Packet Error Rate The reference PER is specified as 8% . The corresponding Es/No (signal to noise ratio per symbol) is 16.4 dB. The Es/No required to achieve the desired BER with maximum system implementation losses is 18.4 dB. The minimum processing gain is again, 10 dB, therefore: dB S J dBdBL S J N E G system output o s p 100.24.16≥       ++=+       +         = dB S J dBG p 104.18≥       += The minimum jammer to signal ratio is as follows: dB S J 4.8−≥       For the case of the HFA3861A, the bit rates are 1, 2, 5.5, and 11 Mbps. The corresponding symbol rates are 1, 1, 1.375, and 1.375 MSps. The chip rate is always 11 MCps, so the ratio of chip rate to symbol rate is 11:1 for the 1 and 2 Mbps rates and 8:1 for the 5.5 and 11 Mbps rates. Since the symbol rate to bit rate is less than 10 for the higher rates, we supply the theoretical processing gain calculation for these cases where spread spectrum processing gain with embedded coding gain is utilized. This is reasonable in that they cannot be separated in the demodulation process. If a separable FEC coding scheme were used, we would not be comfortable making this assertion. intersil PRISM II radio Jamming Margin Test intersil Page 5 As can be seen from the curve of figure 1, the Es/N0 is 16.4 dB at the PER of 8%. This PER can be related to a BER of 1e-5 on 1000 byte packets. With 8 bits per symbol, the Eb/N0 is then 7.4 dB or 9 dB less than the Es/N0. It is well known that the Eb/N0 of BPSK is 9.6 dB for 1e-5 BER, so therefore the coding gain of CCK over BPSK is 2.2 dB. We add this to the processing gain of 9 dB to get 11.2 dB overall processing gain for the CW jammer test. Taking the calculations above, if the dB S J 4.8−≥       then the equipment passes the CW jamming test. Test Configuration: CW Jamming Margin (15.247) (e) Basic Test Block Diagram LAPTOP PERSONAL COMPUTER PRISM RADIO (TX) Σ S Hewlett Packard HP8665B Signal Generator J Spectrum Analyzer Power Meter LAPTOP PERSONAL COMPUTER PRISM RADIO (RX) Shield Room 6 dB Resistive Splitters Step Attenuators Variable Attenuator Test Procedure Setup the simplex link shown. Perform all independen…

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COMPANY NAME: NOKIA WIRELESS BUSINESS COMMUNICATIONS EUT: NOKIA C110 AND C111 CLIENT REFERENCE NUMBER: QUOTE NUMBER WORK ORDER NUMBER: 2000156 FCC ID: ORE-C110-C111 FCC Certification for Direct Sequence Spread Spectrum Page 101 of 207 APPENDIX M: PROCESSING GAIN REPORT Measurement of Processing Gain of a Direct Sequence Spread Spectrum System Certification Report on Compliance with Respect to FCC CFR 47, Paragraph 15.247(e) Product: Nokia C110/C111 Wireless LAN Card April 14, 2000 REPORT PREPARED BY: Rick McMurray Rhein Tech Laboratories, Inc. 360 Herndon Parkway, Suite 1400 Herndon, VA 20170 (703) 689-0368 (703) 689-2056 fax Rhein Tech Laboratories, Inc. Scope This report contains the results of the processing gain testing performed on the Nokia C110 Wireless LAN Cards. The tests were carried out in accordance with FCC CFR 47, Paragraph 15.247(e). The jamming margin method specified in 15.247(e)(2) was used to perform the processing gain testing. FCC 97-114, Guidance on Measurements for Direct Sequence Spread Spectrum Systems, was also utilized as a guiding document for the performance of the processing gain testing. The data submitted for the Nokia C110 is also applicable for the Nokia C111. Both of these devices are identical, except for the fact that the C111 incorporates connectors for external antennas. FCC Requirements The processing gain of a direct sequence system shall be at least 10dB. The processing gain shall be determined from the ratio in dB of the signal-to-noise ratio with the system spreading code turned off to the signal-to-noise ratio with the system spreading code turned on, as measured at the demodulated output of the receiver. Test Equipment Hewlett Packard Spectrum Analyzer, Model 8566B, 100Hz-2.5GHz/2-22GHz Hewlett Packard Signal Generator, Model 8648C, 100kHz-3200MHz Weinschel Broadband Resistive Power Divider, Model 1515, DC to 18.0GHz 1 Watt Weinschel Directional Coupler, Model 1537RA-20, 0.5 to 4.0GHz Weinschel 6dB Attenuator (quantity 2), Model 2, 0 to 18GHz 5W IBM Laptop Computer, Model ThinkPad 600E (used with transmitter) IBM Laptop Computer, Model ThinkPad 600 (used with receiver) Method of Measurement As mentioned in the scope section, the jamming margin method was used. The following drawing titled “Processing Gain – Jamming Test Setup” illustrates a block diagram of the test setup. In this method, a signal generator was stepped in 50kHz increments across the passband of the system. At each point, the level of the signal generator required to produce the recommended Bit Error Rate (BER) was recorded. This level is the jammer level. The output power of the transmitter was also recorded at these same points. This level is the signal level. The jammer to signal ratio (J/S) was then calculated. The worst 20% of the J/S data points were discarded. The lowest remaining J/S ratio was used to calculate the processing gain for each of the channels and rates investigated. The processing gain, Gp, was calculated as follows: Gp = (S/N)o + Mj + Lsys, where Gp = the processing gain of the system, (S/N)o = signal to noise ratio required for the chosen BER, Mj = J/S ratio, and Lsys = system losses. Note that total system losses in a system, including intentional radiator and receiver, are assumed to be no more than 2dB as specified by the FCC. Rhein Tech Laboratories, Inc. An ideal signal to noise ratio, also referred to as (S/N)o or (Es/No), of 13.3dB was used as specified by Intersil when calculating the processing gain when operating at 2Mbps. A value of 16.4dB was used as specified by Intersil when calculating the processing gain when operating at 11Mbps. The Nokia C110/C111 contains chip-sets from Intersil and operates at rates up to 11Mbps. Please see the enclosed documents “Theoretical BER curves for the IEEE 1 and 2 Mbps modulations” and “Testing for compliance with FCC rules 15-247e” by Carl Andren of Intersil Corporation for more information. The use of 8% FER frame error rate (or PER packet error rate) as a substitute for the recommended BER bit error rate is derived in the attached document “Testing for compliance with FCC rules 15-247e” by Carl Andren of Intersil Corporation. Engineering Summary Processing Gain Results Summary: Channel Rate (Mbps) Gp(dB) 1 2 27.13 1 11 15.57 6 11 22.90 11 11 22.73 Following are the calculations and data for the one channel at 2Mbps and the three channels at 11Mbps that were investigated. 5 5 4 4 3 3 2 2 1 1 DD CC BB AA Transmitter Nokia C110 Wireless LAN Card Serial # 1012110004791A Signal Generator HP 8648C Bro…

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