MFMSAMP24WWireless LAN System with Amplifier

SMARTAMP TM BI-DIRECTIONAL POWER AMPLIFIER 2.4 GHz, 1W version User and Installation Manual TELETRONICS INTERNATIONAL, INC. 1803 Research Blvd., Suite 404, Rockville, Maryland, USA, 20850-3155 Email: [email protected] Web Site: www.teletronics.com Tel: (301)-309-8500 Fax: (301)-309-8851 SmartAmp TM is a trademark of Teletronics International Inc. Page 1 Copyright ©2002 by Teletronics International, Inc. Patent Pending 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 the copyright holder. Page 2 Table of contents User and Installation Manual _______________________________________________________i 1. General Product Description ____________________________________________3 2. Background _________________________________________________________3 3. Major Parameters ____________________________________________________4 4. Salient Characteristics:________________________________________________5 5. Installation: ______________________________________________________6 6. DC Power Injector Connections, Indicators and labels: ______________________6 7. Amplifier Connections, Indicators and Labels: _____________________________7 8. Functioning: ________________________________________________________7 9. Specifications: _______________________________________________________8 General Specifications ______________________________________________________ 8 Nominal Loss Characteristics For Different Cables______________________________ 9 10. LIMITED WARRANTY _____________________________________________10 Page 3 1. General Product Description SMART Amplifier (SMARTAMP) is a new bi-directional antenna- mount amplifier designed to match any advanced spread spectrum system, either direct sequence or frequency hopping, to allow the extension of the operating range in wireless environment. It is provided in a wide range of frequencies, such as 900 MHz, 2400 MHz, or 5800 MHz where advanced spread spectrum systems are operated. It works in Time-Division Duplex (TDD) mode that allows the radio device sharing the antenna in different time intervals. SMARTAMP consists of an intelligent algorithm and Automatic Gain Controlled (AGC) circuits to maintain the output power and prevent transmit signal saturation. The input transmit power level is sensed by the Radio Frequency (RF) sensor and the gain is automatically adjusted to minimize the signal distortion so that the desired signal quality can be assured. This product has a wide range of wireless applications in Wireless Local Area Network (WLAN), Wireless Local Loop (WLL), Wireless Internet Access (WIA), wireless modem connection with point-to-point, point-to-multipoint, where the Time Division Duplex (TDD) technology is used. 2. Background In wireless applications, when longer operating range is required, the add-on antenna amplifier and DC injector set are often a choice. Because of different site layout and hardware configuration, it is almost impossible for amplifier manufacture to design the amplifier and fit all applications. Typically, in most applications, the interconnection cable could have different length from a few feet to a few hundred feet. The attenuation between DC injector and bi-directional amplifier could be few dB to more than 20 dB. Also, different radio modems have different output powers. Thus, the system installer must carefully measure the input RF power at the antenna amplifier and specify the gain of the amplifier in order to maintain the system performance. With different systems, different amplifiers are required. With this invention, the major difference as compared to other existing technology, is the ‘‘SMART function’’ - power level detection and automatic gain control circuit. With SmartAmp, the gain can be intelligently adapt to the input power level in a wide range and automatically further adjusted to accommodate the cable and connectors loss, by however length and configuration. The output power level is monitored and maintained intelligently, hence the desired performance can be achieved in all hardware configurations for TDD wireless applications irrespective of installation environment. The table below summarizes the difference between SMARTAMP and other TDD antenna-mount amplifier product. Page 4 Differences Between SmartAmp and Other TDD Amplifier SMARTAMP Other TDD Amplifier Transmit gain Intelligent self adjusted Fixed Transmit power level Maintained Varies, depending on input power level Transmit signal distortion Minimized at all time Much worse at high input power levels Input power range requirements Wide range accepted Designed for narrow range only 3. Major Parameters Smart Amplifier fitted with a Low Noise amplifier (LNA) and together with its unique bi-directional features is fully capable of enhancing the coverage area of 2.4 GHz radio signals by amplifying transmitted and received signals. The Smart Amp ensures a seamless RF link in most installations with long cable losses. Its unique outdoor design enables it to be mast mounted and to operate in wide temperature range of --40 to +75 C. 2.0 mW (+3 dBm) input to the amplifier delivers 1Watt output. For signal input values greater than 3 dBm the Smart Amplifier attenuates the signal accordingly and keeps the output at 30 dBm. Up to 200 mW of power may be safely applied directly to the amplifier input without causing any damage. The complete set includes: 1. An outdoor unit, the SmartAmp 2. DC injector 3. Universal power supply 4. Mounting hardware. The DC injector carries the power along with RF signal to the outdoor unit via co- axial cable. Page 5 4. Salient Characteristics: • Complete One Year Warranty on parts and labor. • Automatic gain control to minimize the signal distortion • Wide Transmit input levels (2mW to 200mW) • …

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AMERICAN TELECOMMUNICATIONS CERTIFICATION BODY INC. 6731 WHITTIER AVE, MCLEAN, VA 22101 RE: Teletronics International Inc. FCC ID: MFMSAMP24W After a review of the submitted information, I have a few comments on the above referenced Application. 1) The sample label shows the labeling placed on the amplifier. The labeling shall be placed on the “main control unit” as specified by 15.19(a)(4). Due to the nature of the system we would still recommend placing the label on the amplifier as well. Please provide additional information showing for the “main control unit”. Please note that the FCC ID placed on the access point is no longer considered valid once the amplifier has been added to the system. Response : The FCC ID label will be placed on the amplifier and the access point, the main control unit. Please refer to the updated Label and Label Location exhibit uploaded with this response. 2) Please provide a higher resolution exhibit for the schematic amplifier and DC injector circuits. The values specified on the schematics are not easily readable. Response : A more easily readable version of these schematics has been uploaded with this response. 3) The information supplied for the antennas appears to include an 8.5 dBi patch antenna which does not appear to be tested or included in this filing. Please confirm that this antenna is not part of this filing. Response : The 8.5 dBi patch antenns is not part of this filing and was included in error. Please refer to the revised Antenna Specifications uploaded with this response. 4) Please provide information for the cable between the access point and the DC injector. Is this cable a standard length? What type of cable was this? Response : The cable between the DC Injector and the amplifier is not a standard cable. The worst case configuration was used for testing. The LMR 600 offers the lowest cable loss with the minimal cable length of 3 feet. Additionally, the response to item 11 will provide further information regarding the worst case conditions. 5) It appears that the minimum and maximum channels built into the Cisco PCMCIA cards were not used. Please comment on this. Since selection of channels will affect compliance of the unit with the FCC's rules, explain what precautions are built into the system to keep the end user from adjusting the power output levels. For example adjustment of this feature is only allowed by passwords used by the installers, etc. (reference 15.15(b)). Response : Please refer to the cover letter from the applicant uploaded with this response, stating that the unit must be professionally installed and will be set only to the authorized channels, 3 through 9. 6) Please provide test configuration photos for conducted emissions testing performed. Response : Please excuse this oversight. The conducted emissions testing configuration photographs are included in the revised Test Set Up Photos Exhibit uploaded with this response. 7) All radiated spurious emissions given in the test report are for the vertical polarity. This test is to measure the emissions that emanate from the all cables, amplifier, DC injector, access point, etc. Please confirm that the device was also checked in the horizontal polarity. Response : The radiated spurious emissions were checked for the horizontal and vertical polarities. The data listed in the report represents the worst-case values only. 8) The test equipment for radiated spurious emissions does not provide an antenna for 12.4 – 18GHz (section 6.3). Please comment. Response : The 12.4-18 GHz horn antenna was inadvertently deleted from the equipment list. This error was corrected and is reflected in the revised test report uploaded with this response. 9) Please provide information to show compliance with the antenna requirements of 15.203. Professional installation must be used if standard connectors are applied (i.e. use of a standard connector is not allowed if professional installation "may" be required or a possible option). Please note that professional installation will require a cover letter addressing the following 3 points: a) Application (or intended use) of the device b) Installation requirements c) Method of marketing the device. Response : Please find the requested information in the cover letter from the applicant, uploaded with this response, and referred to in item 5. 10) Please confirm that this device will only be sold as a system as covered by this application (Access point +PCMCIA Card and Amplifier). Response : Please refer to the aforementioned cover letter from the applicant, uploaded with this response. 11) The amplifier used with this system is an 1 Watt AGC amplifier. The test configuration photographs show the amplifier always used a standard length cable between the access point and the DC injector (see question 4) and a 3’ cable between the DC injector and the amplifier. AGC amplifiers must be investigated for maximum and minimum gain conditions. It appears that only the minimum gain condition only has been investigated. Please provide test data that shows that the system still meets with the AGC amplifier under a maximum gain condition (i.e. add attenuation before the amplifier to create 3 mW condition specified by users manual). Response : Please refer to the Amplifier Test Data, uploaded as exhibit Appendix O, Additional Information for AGC Amplifier. 12) Please comment on the cable length used for 12 dBi omni antenna shown in plots 3-5 through 3-8. Response : The plots have been corrected to indicate the cable length. Please refer to the revised test report uploaded with this response. 13) The maximum exposure separation distance given in the RF exposure exhibit does not match the distance as given in the users manual & test report. Please comment and provide corrected exhibits as appropriate. Note that warnings in the users manual mention 20 cm for the patch antenna. Response : The maximum exposure separation distance given in the RF exposure exhibit has …

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American Telecommunications Certification Body Inc. 6731 Whittier Ave, McLean, VA 22101 RE: Teletronics International Inc. FCC ID: MFMSAMP24W After a review of the submitted information, I have a few comments on the above referenced Application. 1) If the receive port did not have a proper antenna attached to it (the additional receive port for diversity), then compliance with 15.111(a) should be shown. Please comment. RESPONSE: Part 15.111(a) is applicable only for receivers up to 960 MHz. 2) Due to concerns with how linear the transmitter itself behaves, the transmitter should be set to the highest output level and the input reduced to the amplifier by attenuators or additional cable length, and not by reducing the power from the transmitter. The additional information that was uploaded does not explain how the maximum gain of the amplifier was achieved. Please explain how the amplifier was put into a maximum gain condition, given only 150' of cable appeared to be present. RESPONSE: To simulate this condition a long cable was used between the DC injector and the amplifier. An attenuator was not used because it would cause a DC voltage droop on the DC Injector required to power the AMP. The 150’ cable length produced the minimum level at the input of the amplifier required for the amplifier to function. 3) The output power listed in the maximum gain condition was 24.9, while the maximum output power in the original data (with minimum gain) was 29.4 dBm. Assuming the amplifier is expected to behave relatively flat across its minimum to maximum gains, the input to the amplifier should be reduced via additional attenuation (using additional cable or attenuators) until the output power at the output is seen to start to drop. This is typically the point at which the following 2 conditions occur: a) the maximum gain from the amplifier and b) the maximum RF input to the amplifier exists for the condition where the amplifier gain is maximized. Please provide feedback on this issue. Please note that information given in section 2.4.1 of the users manual supports that the output should be flat. Please provide test data that supports the proper maximized configuration while the amplifier is in a maximum gain condition. RESPONSE: Plots and values of the power at the output of the amplifier as a function of the injected input power of the amplifier have been added to the addendum of the report uploaded with this response. The behavior of the amplifier is not flat as stated in the manual, however the worst-case configuration with the highest power output and the lowest power output were tested. 4) While your conclusions based upon the additional testing seem reasonable regarding the AGC amplifier in a maximum gain condition, we need to be sure that for the radiated test the unit is maximized as given in #3) above. Additionally, please provide data for at least one antenna from each type (dish, Omni, patch) antennas, using the one from each group that had the worst case margins based upon the previously tested minimum gain conditions. For future submittals, please be sure to test all submitted configurations for both minimum and maximum AGC gain conditions. RESPONSE: The unit was tested for the worst channel with the highest antenna gain of each family type. Please refer to the data in the appendix uploaded with this response. 5) Please update the attestation letter (referring to the reduction of channels and method of marketing) to include the specific access point, PCMCIA Card, and Teletronics components combined together as a system (i.e. add the model number or similar information). RESPONSE : Please refer to the revised attestation letter uploaded with this response. 6) Please provide Spectral Power Density results for the condition when the amplifier is at maximum gain. RESPONSE : Plots have been added to the addendum uploaded with this response. 7) The users manual mentions Cisco Aironet 350 Series products include the AIR-LMC-352 PC Card, AIR-WGB-352R Work Group Bridge unit, AIR-AP352E2R-A-K9 Access Point unit, and the AIRBR352R-A-K9 Bridge units. This application only covers the specific system (access point w/ PCMCIA Card and amplifier +DC injector as specified in the application. Please address this issue. RESPONSE : A DoC report and compliance information is on file for the bridge units.

American Telecommunications Certification Body Inc. 6731 Whittier Ave, McLean, VA 22101 October 10, 2002 RE: Teletronics International Inc. FCC ID: MFMSAMP24W After a review of the submitted information, I have a few comments on the above referenced Application. 1) The block diagram of the test system on page 15 of 22 of the new appendix does not show the cable length between the amplifier and the antenna. Did this length vary for each type of antenna type tested as in the original testing and according to the table on page 9 of 141 of the original test report? Please comment and/or correct this fact. Response : As stated in the report, the minimal cable length that could be used for each antenna is listed in Table 2-1. This is the length of cable that was used for the maximum amplification of the AGC. 2) From the information provided the original testing was performed with about 19.3 dBm into the amplifier. The additional testing states that the power was reduced to a minimum at the amplifier input of around 9 dBm (Ref:Additional Appendix Section 2.4). However, the users manual states that the minimum input is around 3 dBm, which per our discussions and your data have shown will not occur. Please correct Table 2-1 of the users manual regarding the minimum specified input into the amplifier. Response: Please find the value corrected in the Table 2-1 of the User’s Manual. 3) The device configuration and labeling issues addressed in this application are for the configuration using a combined system with the Access Point only (note that the specific models approved will be listed as a grant condition). For the PCMCIA and Bridge configurations mentioned, the following concerns arise: PCMCIA Card - Standalone Although the Radio is the same, this approval is being performed for a system, in which everything must ship at the same time. In order to approve the device as a general PCMCIA card would require a separate FCC ID, and the application would also need to address the modular requirements (including testing as a stand alone device). Bridge Units : If the differences between the access point and the bridge units are considered software or minor hardware issues (to the digital device portion only), then these models may also be able to be included under the same FCC ID Number. To help determine if we can approve these under a single ID number, we require a detailed explanation of the differences between the bridge (both models) and access point units. Also, if there are any physical differences than can be seen in photographs (both internal & external) then additional photographs should also be supplied. Please note that alternatively if the PCMCIA Card had been tested and approved in a modular fashion (same as CISCO originally did), then the PCMCIA card could then be used as a stand alone, in a laptop, or in different devices such as the access point and bridge units without further certifications (although certain labeling/manual issues would need to be applied to each of the units it was installed within). Response : Please find the name of the products that should be used in conjunction with the DC Injector and the amplifier as a system, in the cover letter uploaded with this response.

Tim: I am really very sorry about all this back- and-forth with this application - I wasn't privy to your discussion with Desmond yesterday. I just uploaded a revised letter from the client that I hope will meet the requirements. Please advise if it does not. Thank you very much. Kathy 703-689-0368 x106 -----Original Message----- From: Timothy R. Johnson [mailto:[email protected] ] Sent: Thursday, October 10, 2002 11:57 PM To: Kathy Grzovic Subject: RE: Review of Teletronics International Inc., FCC ID: MFMSAMP24W Kathy, I am a little confused about the response to the last question in our latest correspondence. Talking with Desmond today, the approval will only be valid for the following system: DC Injector, 1 Watt Amplifier, Access Point with integrated PCMCIA Card. The other models (PCMCIA Card by itself and the bridge models) will not be covered by this application. However, the last Client attestation uploaded references the access point, PCMCIA Card, and 2 bridge models. This contradicts my understanding of what we discussed. Please explain. Thanks, Tim At 05:45 PM 10/10/2002, you wrote: >Tim: > >I just uploaded our response to this correspondence. >Please review and advise if any additional information >is required. > >Thank you very much. > >Kathy To: "'Timothy R. Johnson'" <[email protected]> Subject: RE: Review of Teletronics International Inc., FCC ID: MFMSAMP24W Page 1 of 2Teletronics Intl MFMSAMP24W 10/11/2002Printed for "Timothy R. Johnson" <[email protected]> > >-----Original Message----- >From: Timothy R. Johnson [mailto:[email protected] ] >Sent: Thursday, October 10, 2002 02:13 PM >To: Kathy Grzovic >Subject: Review of Teletronics International Inc., FCC ID: MFMSAMP24W > > >Kathy, > >Please see attached....Most of this was discussed this morning. > >Thanks > >Tim Page 2 of 2Teletronics Intl MFMSAMP24W 10/11/2002Printed for "Timothy R. Johnson" <[email protected]>

American Telecommunications Certification Body Inc. 6731 Whittier Ave, McLean, VA 22101 August 25, 2002 RE: Teletronics International Inc. FCC ID: MFMSAMP24W After a review of the submitted information, I have a few comments on the above referenced Application. 1) The sample label shows the labeling placed on the amplifier. The labeling shall be placed on the “main control unit” as specified by 15.19(a)(4). Due to the nature of the system we would still recommend placing the label on the amplifier as well. Please provide additional information showing for the “main control unit”. Please note that the FCC ID placed on the access point is no longer considered valid once the amplifier has been added to the system. 2) Please provide a higher resolution exhibit for the schematic amplifier and DC injector circuits. The values specified on the schematics are not easily readable. 3) The information supplied for the antennas appears to include an 8.5 dBi patch antenna which does not appear to be tested or included in this filing. Please confirm that this antenna is not part of this filing. 4) Please provide information for the cable between the access point and the DC injector. Is this cable a standard length? What type of cable was this? 5) It appears that the minimum and maximum channels built into the Cisco PCMCIA cards were not used. Please comment on this. Since selection of channels will affect compliance of the unit with the FCC's rules, explain what precautions are built into the system to keep the end user from adjusting the power output levels. For example adjustment of this feature is only allowed by passwords used by the installers, etc. (reference 15.15(b)). 6) Please provide test configuration photos for conducted emissions testing performed. 7) All radiated spurious emissions given in the test report are for the vertical polarity. This test is to measure the emissions that emanate from the all cables, amplifier, DC injector, access point, etc. Please confirm that the device was also checked in the horizontal polarity. 8) The test equipment for radiated spurious emissions does not provide an antenna for 12.4 – 18 GHz (section 6.3). Please comment. 9) Please provide information to show compliance with the antenna requirements of 15.203. Professional installation must be used if standard connectors are applied (i.e. use of a standard connector is not allowed if professional installation "may" be required or a possible option). Please note that professional installation will require a cover letter addressing the following 3 points: a) Application (or intended use) of the device b) Installation requirements c) Method of marketing the device. 10) Please confirm that this device will only be sold as a system as covered by this application (Access point + PCMCIA Card and Amplifier). 11) The amplifier used with this system is an 1 Watt AGC amplifier. The test configuration photographs show the amplifier always used a standard length cable between the access point and the DC injector (see question 4) and a 3’ cable between the DC injector and the amplifier. AGC amplifiers must be investigated for maximum and minimum gain conditions. It appears that only the minimum gain condition only has been investigated. Please provide test data that shows that the system still meets with the AGC amplifier under a maximum gain condition (i.e. add attenuation before the amplifier to create 3 mW condition specified by users manual). 12) Please comment on the cable length used for 12 dBi omni antenna shown in plots 3-5 through 3-8. 13) The maximum exposure separation distance given in the RF exposure exhibit does not match the distance as given in the users manual & test report. Please comment and provide corrected exhibits as appropriate. Note that warnings in the users manual mention 20 cm for the patch antenna. 14) The users manual mentions both a 500 mW and 1 W amplifier. Please note that this application only covers the 1 Watt version. 15) The second RF port appears to not have been connected. Please comment on if this port is disabled (as mentioned in the users manual). --- Continued on Next Page --- z Page 2August 25, 2002 16) The users manual does not appear to include prohibition against co-location. 17) Information regarding 15.247(b)(3)(iii) should be included in the users manual. Timothy R. Johnson Examining Engineer Direct Phone: 404-414-8071 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.

American Telecommunications Certification Body Inc. 6731 Whittier Ave, McLean, VA 22101 September 27, 2002 RE: Teletronics International Inc. FCC ID: MFMSAMP24W After a review of the submitted information, I have a few comments on the above referenced Application. 1) If the receive port did not have a proper antenna attached to it (the additional receive port for diversity), then compliance with 15.111(a) should be shown. Please comment. 2) Due to concerns with how linear the transmitter itself behaves, the transmitter should be set to the highest output level and the input reduced to the amplifier by attenuators or additional cable length, and not by reducing the power from the transmitter. The additional information that was uploaded does not explain how the maximum gain of the amplifier was achieved. Please explain how the amplifier was put into a maximum gain condition, given only 150' of cable appeared to be present. 3) The output power listed in the maximum gain condition was 24.9, while the maximum output power in the original data (with minimum gain) was 29.4 dBm. Assuming the amplifier is expected to behave relatively flat across its minimum to maximum gains, the input to the amplifier should be reduced via additional attenuation (using additional cable or attenuators) until the output power at the output is seen to start to drop. This is typically the point at which the following 2 conditions occur: a) the maximum gain from the amplifier and b) the maximum RF input to the amplifier exists for the condition where the amplifier gain is maximized. Please provide feedback on this issue. Please note that information given in section 2.4.1 of the users manual supports that the output should be flat. Please provide test data that supports the proper maximized configuration while the amplifier is in a maximum gain condition. 4) While your conclusions based upon the additional testing seem reasonable regarding the AGC amplifier in a maximum gain condition, we need to be sure that for the radiated test the unit is maximized as given in #3) above. Additionally, please provide data for at least one antenna from each type (dish, Omni, patch) antennas, using the one from each group that had the worse case margins based upon the previously tested minimum gain conditions. For future submittals, please be sure to test all submitted configurations for both minimum and maximum AGC gain conditions. 5) Please update the attestation letter (referring to the reduction of channels and method of marketing) to include the specific access point, PCMCIA Card, and Teletronics components combined together as a system (i.e. add the model number or similar information). 6) Please provide Spectral Power Density results for the condition when the amplifier is at maximum gain. 7) The users manual mentions Cisco Aironet 350 Series products include the AIR-LMC-352 PC Card, AIR-WGB- 352R Work Group Bridge unit, AIR-AP352E2R-A-K9 Access Point unit, and the AIRBR352R-A-K9 Bridge units. This application only covers the specific system (access point w/ PCMCIA Card and amplfier+DC injector as specified in the application. Please address this issue. Timothy R. Johnson Examining Engineer Direct Phone: 404-414-8071 mailto: [email protected] The item…

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