PIDAIRSPAN-WIPLL9WippLL Radio

02030311-07 Airspan Networks Inc. 2-1 Safety Guidelines This chapter outlines safety guidelines when installing the AS WipLL system. Warning: The user and the installer should be aware that changes and modifications not expressly approved by Airspan Networks could void the user’s authority to operate the equipment. Warning: Never install equipment that is damaged. Warning: Only qualified personnel should be allowed to install, replace, and service the AS WipLL equipment. 2.1. Electrical Safety Guidelines Warning: Disconnect all power when installing. 2.1.1. Handling Electrostatic Devices Electrostatic devices are those devices that may be damaged by the inadvertent discharge of static electricity from a charged body. The risk of damage, due to electrostatic discharge (ESD) to a device, may cause the device to fail suddenly, or it may induce a partial defect within the device, which will cause subsequent premature failure. 2 Safety Guidelines Hardware Installation Guide 2-2 Airspan Networks Inc. 02030311-07 Static electricity can result from operators walking on floors, moving around on chairs, from the movement of operator's clothing or even casual brushing against racks, benches or walls. Airspan recommends the following guidelines to be adopted to minimize the risk of component failure due to electrostatic discharge to the device: „ AS WipLL devices are provided typically in see-through anti-static bags. Wherever possible, checking and inspection of a unit should occur without removing it from the bag. „ All operators shall wear the approved conductive overall. „ Where operators come into direct contact with any piece of electronic hardware, operators must wear an ESD-preventive wrist strap. All straps and cords should be tested using a Wrist Strap Tester prior to use. The wrist strap cords shall have a 2 Meg Ohm resistor fitted at either end. Wrist straps should be worn in direct contact with bare skin and not over clothing. Warning: To prevent ESD damage to AS WipLL devices, always wear an ESD wris t strap when handling these devices or coming into contact with internal components. 2.1.2. Grounding Only certain AS WipLL devices require additional grounding. AS WipLL devices that do not require additional grounding have grounding at the main supply outlet. The following table lists the AS WipLL devices’ grounding requirements. Table 2-1: AS WipLL grounding requirements Site AS WipLL device Grounding BSR Through the mains (via BSDU) BSDU Additional grounding required (grounding lug at rear end of chassis) Base Station BSPS Additional grounding required (grounding lug at rear end of chassis) CPE SPR Through the mains (via SDA) Hardware Installation Guide Safety Guidelines 02030311-07 Airspan Networks Inc. 2-3 IDR Through the mains 2.1.3. Lightening Protection Warning: Never install the equipment during stormy weather and lightening. AS WipLL devices comply with the Surge Immunity standard: EN 61000-4-5. AS WipLL devices are protected from lightening surges as the outdoor devices (BSRs and SPRs) are encased in a plastic chassis. Therefore, if lightening strikes the device, an electrical circuit cannot be completed, and hence, no electrical surge can occur. In addition, AS WipLL outdoor and indoor (SDA) devices provide high-speed data line protection against direct and induced transient over-voltages surges on the cables. This capability is provided by the fact that all AS WipLL devices are designed with TVS (transient voltage suppressor) components that maintain potential differences. However, for geographical areas that have above normal lightening activity, Airspan can supply a surge protector composed of a 15-pin D-type adapter with a grounding wire. Safety Guidelines Hardware Installation Guide 2-4 Airspan Networks Inc. 02030311-07 2.2. Installing AS WipLL Radios and Third-Party External Antennas Warning: For unlicensedbands, it is the responsibility of the person installing the AS WipLL system to ensure that when using the outdoor antenna kits in the United States (or where FCC rules apply), that only those antennas certified with the product are used. The use of any antenna other than those certified with the product is expressly forbidden in accordance with FCC rules CFR47 part 15.204. The installer should configure the output power level of antennas according to country regulations and per antenna type. Warning: Outdoor AS WipLL units and antennas should be installed ONLY by experienced installation professionals who are familiar with local building and safety codes and, wherever applicable, are licensed by the appropriate government regulatory authorities. Failure to do so may void Airspan’s AS WipLL product warranty and may expose the end user or the service provide r to legal and financial liabilities. Airspan and its resellers or distributors are not liable for injury, damage or violation of regulations associated with the installation of outdoor units or antennas. Warning: When using external antennas, the external antennas must not be co-located or operating in conjunction with any other antenna or transmitter. Warnings: 1) The device cannot be sold retail, to the general public or by mail order. It must be sold to dealers. 2) Installation must be controlled. 3) Installation must be performed by licensed professionals. 4) Installation requires special training. Hardware Installation Guide Safety Guidelines 02030311-07 Airspan Networks Inc. 2-5 Warning: For unlicensedbands, in accordance with FCC regulations, ensure that the external antennas provide an EIRP of less than or equal to 36 dBm to prevent interference with other radios operating in the unlicensed band. The EIRP is defined by the following formula: Max. Power Output + Antenna Gain - Cable Loss ≤ 36 dBm (EIRP) Airspan does not supply cables for connecting external antennas. It is the responsibility of the installer to provide the cable and ensure the cable characteristics (e.g. length and cable loss) enables adhere…

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02030311-07 Airspan Networks Inc. 6-1 Installing the BSR This chapter describes the installation of the WipLL Base Station Radio (BSR), which is installed at the Base Station. Warning: This device must not be co-located or operating in conjunction with any other antenna or transmitter. Note: The maximum cable length between the BSR and terminating equipment is 100 meters. 6.1. Basic Design and Physical Dimensions The BSR is encased in a chassis providing access to the BSR’s communication ports on the front panel. The BSR’s bottom panel provides holes for mounting the BSR to, for example, a pole or wall. The BSR provides the following ports: „ 9-pin D-type: RS-232 (serial) interface „ 15-pin D-type: data, synchronization, and power interface 6 Installing the BSR Hardware Installation Guide 6-2 Airspan Networks Inc. 02030311-07 Figure 6-1: BSR front panel (built-in antenna model) The BSR’s physical dimensions are described in Table 6-1 Table 6-1: BSR physical dimensions Parameter Value Comment Height 400 mm (15.74 inches) Width 317 mm (12.48 inches) Depth 65.5 mm (2.58 inches) Weight 4.7 kg The BSR’s physical dimensions exclude the mounting kit Serial port Data, synchronization, and power port Hardware Installation Guide Installing the BSR 02030311-07 Airspan Networks Inc. 6-3 6.2. Mounting The BSR can be mounted on a wall or pole. The BSR is mounted using the mounting holes located on the BSR’s bottom panel (see Figure 6-2) and the mounting bracket (provided by Airspan). Figure 6-2: BSR bottom panel providing holes for mounting Note: The BSR must be mounted in a location whereby the antenna used fo r the BSR is not co-located or operated in conjunction with any other antenna or transmitter. Mounting holes Installing the BSR Hardware Installation Guide 6-4 Airspan Networks Inc. 02030311-07 6.2.1. Minimum Distance Between BSRs To prevent radio interference, each BSR requires a minimum of 1-metre separation between adjacent BSRs (see Figure 6-3). 1 Metre min. Figure 6-3: Minimum separation between mounted BSRs Warning: To avoid RF interference between BSRs operating in the 700 MHz, where four BSRs are installed at a Base Station, a 1-meter separation must be provided between the antennas of the BSRs operating in the lower frequencies (i.e., 711.5 and 714.5 for 1 Msps mode; 712 and 714 for 1.33 Msps mode) and the antennas of the BSRs operating in the upper frequencies (i.e., 741.5 and 744.5 for 1 Msps mode; 742 and 744 for 1.33 Msps mode). Warning: The BSR emits microwave radiation; a minimum distance o f 200 mm must be maintained from the front of the BSR. Hardware Installation Guide Installing the BSR 02030311-07 Airspan Networks Inc. 6-5 6.2.2. Wall Mounting BSR wall mounting is performed in two stages: „ Attaching the mounting bracket to the BSR’s mounting holes „ Attaching the mounting bracket (attached to the BSR) to the wall To mount the BSR on a wall: 1. Attach the mounting bracket to the BSR using two stainless steel bolts, as shown in Figure 6-4. Jubilee clip slots BSR BSR Fixing Bolts BSR Mounting Bracket 15-pin D-type connector Figure 6-4: Attaching the mounting bracket to the BSR 2. Attach the mounting bracket to the wall using four screws. The fixing dimensions for the mounting bracket are illustrated in Figure 6-5 Installing the BSR Hardware Installation Guide 6-6 Airspan Networks Inc. 02030311-07 Note: Airspan does not provide screws for attaching the mounting bracket to the wall. The screw size depends on the structure of the building to which the bracket is to be attached. When selecting screw sizes, consideration must be given to the weight of the BSR and load that may be induced in windy conditions. 58mm 8mm 99mm Figure 6-5: BSR mounting bracket dimensions for the four fixing holes 3. Adjust the horizontal positioning of the BSR, and then fasten tight the two stainless-steel bolts. Hardware Installation Guide Installing the BSR 02030311-07 Airspan Networks Inc. 6-7 Rotation is restricted to the horizontal plane only. The permissible rotation is shown in Figure 6-6. Figure 6-6: Horizontal rotation of the BSR Note: A thread-locking compound is to be used to prevent the bolts working loose. Installing the BSR Hardware Installation Guide 6-8 Airspan Networks Inc. 02030311-07 6.2.3. Pole Mounting The BSR can be mounted on a pole (see Figure 6-7). Pole mounting allows the BSR to be adjusted in the horizontal and vertical planes. The pole-mounting bracket is designed to support the BSR on a round pole of 45 mm in diameter. Figure 6-7: Pole-mounted BSR Hardware Installation Guide Installing the BSR 02030311-07 Airspan Networks Inc. 6-9 To mount the BSR on a pole: 1. Attach the mounting bracket to the BSR using two stainless steel bolts. Pivot Hole ‘U’ Bolt Locking Holes BSR mounting Bracket Clamping Bracket Figure 6-8: BSR mounting bracket assembly 2. Attach the clamping bracket to the mounting bracket using two M8 stainless bolts. 3. Attach the Clamping bracket to the pole by placing the U-bolt around the pole, and then inserting the U-bolt through the Clamping bracket and securing it by screwing the two bolts on the U-bolt. Installing the BSR Hardware Installation Guide 6-10 Airspan Networks Inc. 02030311-07 4. Adjust the vertical position of the BSR. Lock the BSR at the desired position by inserting the locking bolt in the desired position. Once the correct angle has been set both bolts must be tightened to lock the BSR bracket in place. 5. Adjust the horizontal position of the BSR by rotating the BSR about the pole, and then tighten the U-bolt. BSR positioning is obtained in two planes by adjustment of the mounting bracket assembly a shown in Figure 6-9. Rotation about the mounting pole Rotation about the mounting bracket Figure 6-9: BSR orientation in vertical (top figure) and horizontal plane (lower figure) Note: A thread-locking compound is to be used to prevent the bolts working loose. A loop should be left in the cable for maintenance purposes and to prevent the cable wei…

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02030311-07 Airspan Networks Inc. 10-1 Installing the SPR This chapter describes the installation of the WipLL Subscriber Premises Radio (SPR), located at the subscriber's premises. Warning: Cables with exposed ends (i.e., not yet crimped) should be covered with protective polythene bags during external cable installation processes. Warning: As the system emits microwave radiation, a minimum distance o f 200 mm must be maintained from the front of the SPR. Warning: To avoid electrical or fire hazard, connect the SPR to the powe r supply only after mounting the SPR and connecting data cables. Note: Usually, the SPR is initialized (i.e., configured with an IP address) at Airspan's factory. However, if the SPR has not been configured, see Section 10.5, “Connecting to a PC for Serial Configuration”, before mounting the SPR. 10 Installing the SPR Hardware Installation Guide 10-2 Airspan Networks Inc. 02030311-07 Note: The digital portion of the transceiver has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment on and off, the user is encouraged to try correct the interference by performing one or more of the following measures: - Reorientate or relocate the receiving antenna - Increase separation between the equipment and receiver - Connect the equipment to an outlet on a circuit different from that to which the receiver is connected - Consult the dealer or an experienced radio/TV technician for help Note: A minimum separation of 200 mm should exist between power and data cables. Hardware Installation Guide Installing the SPR 02030311-07 Airspan Networks Inc. 10-3 10.1. Physical Dimensions and Basic Design The SPR is encased in a chassis and provides access to the SPR’s communication port (15-pin D-type) at the front panel (see figure below). The SPR’s bottom panel provides holes for mounting the SPR to, for example, a pole or wall. Figure 10-1: SPR (with built-in antennal) The SPR’s physical dimensions are described in the following table. Table 10-1: SPR physical dimensions SPR model Parameter Standard Gain Antenna High Gain Antenna Comment Height 311 mm (12.24 inches) 400 mm (15.74 inches) Width 224 mm (8.82 inches) 317 mm (12.48 inches) Depth 65.5 mm (2.58 inches) 65.5 mm (2.58 inches) Weight 2.5 kg 4.7 kg The SPR’s physical dimensions exclude the mounting kit. SPR models with an N-type receptacle for attaching a third-party external antenna are also available. 15-pin D-type port Installing the SPR Hardware Installation Guide 10-4 Airspan Networks Inc. 02030311-07 10.2. Mounting the SPR The SPR can be mounted on a wall or pole. The SPR is mounted using the mounting holes located on the SPR’s bottom panel (see Figure 10-2), and the mounting bracket (provided). The mounting brackets for wall- and pole mounting are different from one another. Figure 10-2: SPR bottom panel providing holes for mounting Mounting holes Hardware Installation Guide Installing the SPR 02030311-07 Airspan Networks Inc. 10-5 10.2.1. Minimum Distance between SPRs A minimum of 3-meter separation is required between mounted SPRs and existing customer radio equipment when not transmitting on the same sector (see Figure 10-3). 3.0 metres Figure 10-3: SPR separation when not transmitting on the same sector A 1-meter separation is required between SPRs when on the same sector and transmitting to the same BSR without requiring shielding (see Figure 10-4). 1.0 metre Figure 10-4: SPR separation when transmitting on the same sector to the same BSR Installing the SPR Hardware Installation Guide 10-6 Airspan Networks Inc. 02030311-07 10.2.2. Wall-Mounting SPR wall mounting is performed in two stages: „ Attaching the mounting bracket to the SPR’s mounting holes. „ Attaching the mounting bracket (attached to the SPR) to the wall. To mount the SPR on a wall: 1. Position the mounting bracket on the mounting surface (e.g., wall), and then use a pencil to mark the position of the four mounting holes. 2. Drill holes for each hole that you marked in the step above. 3. Insert wall anchors into each of the drilled holes. 4. Align the mounting bracket’s four holes with the wall anchors, and then insert a screw through the mounting bracket holes into each wall anchor, and tighten. The figure below displays relevant dimensions of the mounting bracket. Note the two different sized fixing holes. Hardware Installation Guide Installing the SPR 02030311-07 Airspan Networks Inc. 10-7 Figure 10-5: Attaching mounting bracket to wall Below is a diagram illustrating the fixing dimensions of the mounting bracket. Ensure that the distance between the hole centers are 120 mm and 60 mm. Installing the SPR Hardware Installation Guide 10-8 Airspan Networks Inc. 02030311-07 Figure 10-6: SPR mounting bracket dimensions for the four fixing holes Hardware Installation Guide Installing the SPR 02030311-07 Airspan Networks Inc. 10-9 5. Attach the SPR to the mounting bracket using the two stainless steel bolts (supplied), washers, and nuts as shown in the figure below. Figure 10-7: Attaching SPR to mounting bracket Installing the SPR Hardware Installation Guide 10-10 Airspan Networks Inc. 02030311-07 Note: Airspan does not provide screws for attaching the mounting bracket to the wall. The screw size depends on the structure of the building to which the bracket is to be attached. When selecting screw sizes, consideration must be given to the weight of the SPR and load tha…

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Airspan Networks (Israel) Ltd. Unitronics Bldg., 1 Harava street, P.O.B. 199, Airport City, 70100, Israel tel. +972 3977 7444 FAX: +972 3977 7400 www.airspan.com American TCB 6731 Whittier Ave Suite C110 McLean, VA 22101 USA May 30, 2004 Subject: Request for confidentiality for the outdoor radio unit (hybrid transceiver), model names 1) BSR 900MHz TDD Ext A, 2) BSR 900MHz TDD V-pol A, 3) SPRL 900MHz TDD Ext A, 4) SPRL 900MHz TDD V-pol A, FCC ID:PIDAIRSPAN-WIPLL9 Dear Gentlemen, We apply to you with request to withhold Airspan Networks (Israel) Ltd. trade secrets in Application for Certification for FCC ID:PIDAIRSPAN-WIPLL9. These trade secrets can be found in the schematic diagram Schematic_15694_IP (5 pages of this Application). Many thanks in advance. Sincerely yours Zion Levi compliance & testing engineer Airspan Networks (Israel) Ltd.

Company name: Airspan Networks (Israel) Ltd Address: Harava St,”Unitronics” building Airport City 70100, P.O.199 Israel Installaing Outdoor & Indoor units and Third-party External Antennas 1. The device cannot be sold retail,to the general public or by mail order,it must be sold to dealers. 2. Installation must be controlled. 3. Installation must be preformed by licensed professionals. 4. Installation requires special training. Name of authorized person: Zion Levi Position: Compliances & Testing Engineer Date: May 30, 2004: Airspan Networks (Israel) Ltd., Israel Tel: +972-3-9777444 ; Fax: +972-3-9777400, www.airspan.com

American Telecommunications Certification Body Inc. 6731 Whittier Ave, McLean, VA 22101 May 27, 2004 RE: Airspan Networks FCC ID: PIDAIRSPAN-WIPLL9 After a review of the submitted information, I have a few comments on the above referenced Application. 1) The characters used for the FCC ID must be all capital letters. Please update labeling exhibit and other exhibits as necessary. 2) If standard N connectors are used as provided in this applicaiton, then the application must include a separate cover letter asking and justifying professional installation. The letter should address the following 3 items: a) Marketing examples: - The device cannot be sold retail, to the general public or by mail order. It must be sold to dealers or have strict marketing control. b) Requires professional installation; examples: - installation must be controlled. - installed by licensed professionals ( EUT sold to dealer who hire installers) - installation requires special training ( special programming, access to keypad, field strength measurements made) What is unique, sophisticated, complex, or specialized about your equipment which REQUIRES it to be installed by a professional installer? c) Application example: - The intended use is generally not for the general public. It is generally for industry/commercial use. 3) It is confusing to determine which external antennas are being approved for this device due to different models, etc. The FCC expects a list of antennas as to what antennas are being approved (type, gain, etc.) to be with the application. Please clarify. 4) It appears from the information provided that the device may be used with directional panel antennas, and omni-directional antennas (2.5.2.1.1). Note the FCC expects the device to be tested with each TYPE of antenna as well, regardless of gains involved. 5) Note that there is a variety of ways to approve a hybrid system (attachment for hybrids from the FCC has been provided on previous occasions). Recently approved devices for Airspan included both a FHSS and hybrid mode. Please explain if this device employs different operational modes or if it is always in hybrid mode. Note that there is a concern regarding FHSS mode only as the bandwidth is greater than that normally allowed for 900 MHz FHSS systems. The remainder of this application and comments was reviewed assuming the device is always in hybrid mode and can not normally operate in mutually exclusive modes. Other recently approved Airspan at 900 MHz only operated in hybrid mode (device does not operate in FHSS or DTS mode independently). 6) It is not clear from plot A8 provided that the whole Ton time is shown. Please provide an updated plot. --- Continued on Next Page ---- z Page 2 May 27, 2004 7) The test report mentions cable loss for use with the 15.5 dBi gain antenna. It is uncertain if this cable already is provided permanently attached to the antenna, or is the responsibility of the installer to provide the cable. If a minimum cable length is necessary to be added during the installation, this should be shown in the manual in a clear and non-confusing way. Please clarify. Timothy R. Johnson 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.

HERM O N LA BO RA TO RIES May 31, 2004 American TCB 6731 Whittier Ave Suite C110 McLean, VA 22101 Attn: Mr. T. Johnson, Examining Engineer RE: your e-mail dated May 27, 2004; Airspan Networks Ltd. FCC ID: PIDAIRSPAN-WIPLL9, ATCB001329 Dear Mr. Johnson, Please find below the answers to your questions. 1) The revised files: a) Label_BSR_SPRL_15694_IP_rev1, b) ATCB_Form_731_15694_IP_rev1, c) cover_letter_15694_IP_rev1, d) confidentiality_15694_IP_rev1 were uploaded on May 31, 2004. 2) The “FCC 900MHz installation_marketing_letter” was uploaded on May 31, 2004 via Additional Information folder. 3) “External_antenna_specifications_BSR900” document was uploaded on May 31, 2004 via Operational Description folder. 4) Please see paragraph 3 above. 5) Yes, we confirm that only hybrid mode. 6) Video trigger starts the SA sweep that’s why the transmission start coinsides with the left edge of the plot. We confirm that the Tx time was also verified with the longer sweep time and lower time resolution and was measured in video trigger mode to improve accuracy. 7) The revised “Safety_guidelines_15694_IP_rev1” (refer to page 2-5), was uploaded on May 31, 2004 via User Manual folder. Many thanks. Sincerely, Marina Cherniavsky, certification engineer Hermon Laboratories

FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 1 of 5 EXTERNAL PHOTOGRAPHS This document contains 4 photographs FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 2 of 5 Photograph No.1 BSR 900MHz TDD, SPRL 900MHz TDD radio units Front view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 3 of 5 Photograph No.2 BSR 900MHz TDD , SPRL 900MHz TDD V radio units Rear side view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 4 of 5 Photograph No.3 BSR 900MHz TDD V-pol A, SPRL 900MHz TDD V-pol A radio units Side panel view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 5 of 5 Photograph No.4 BSR 900MHz TDD Ext A, SPRL 900MHz TDD Ext A radio units Side panel view

FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 1 of 2 LABEL The labels shown below are affixed on the bottom of the BSR 900MHz TDD V-pol A, BSR 900MHz TDD V Ext A, SPRL 900MHz TDD V-pol A, SPRL 900MHz TDD Ext A radio units. The label material is PVC with a permanent adhesive. FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 2 of 2 LABEL LOCATION Label location

FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 1 of 9 INTERNAL PHOTOGRAPHS This document contains 8 photographs FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 2 of 9 Photograph No.1 BSR 900MHz TDD V-pol A, SPRL 900MHz TDD V-pol A internal view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 3 of 9 Photograph No.2 BSR 900MHz TDD V-pol A, SPRL 900MHz TDD V-pol A internal antenna FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 4 of 9 Photograph No.3 BSR 900MHz TDD V-pol A, SPRL 900MHz TDD V-pol A RF module PCB front view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 5 of 9 Photograph No.4 BSR 900MHz TDD V-pol A, SPRL 900MHz TDD V-pol A RF module PCB second side view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 6 of 9 Photograph No.5 BSR 900MHz TDD Ext A, SPRL 900MHz TDD Ext A internal view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 7 of 9 Photograph No.6 BSR 900MHz TDD Ext A, SPRL 900MHz TDD Ext A RF module PCB front view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 8 of 9 Photograph No.7 BSR 900MHz TDD Ext A, SPRL 900MHz TDD Ext A RF module PCB second side view FCC ID:PIDAIRSPAN-WipLL9 Date: May 2004 Page 9 of 9 Photograph No.8 BSR 900 MHz, SPRL 900 MHz RF and digital boards

25030311-08 Airspan Networks Inc. 2-1 WipLL Radio Technology: Physical Layer The WipLL system provides wireless, local-loop connectivity between the provider’s IP-based backbone and the subscriber. This radio link is established between WipLL transceivers located at the Base Station and subscriber sites. This chapter discusses the following radio frequency (RF) physical layer issues related to the WipLL system: „ Frequency Hopping Spread Spectrum „ Modulation „ Frequency Bands „ Standards Compliance „ WipLL RF Antennas „ Radio Planning 2 WipLL Radio Technology: Physical Layer System Description 2-2 Airspan Networks Inc. 25030311-08 2.1. Frequency Hopping Spread Spectrum The WipLL system implements frequency-hopping code division multiple access (FH-CDMA) spread spectrum modulation for digital signal transmission over the air between the Base Station and the subscriber site. The WipLL system’s frequency hopping supports a channel bandwidth of 1 MHz or 1.33 MHz, and channel spacing of 1 MHz (or 1.75 MHz if operating in the 3.5 GHz band). Frequency hopping is a basic modulation techniques used in spread spectrum signal transmission. Spread spectrum enables a signal to be transmitted across a frequency band that is much wider than the minimum bandwidth required by the information signal. The transmitter "spreads" the energy, originally concentrated in narrowband, across a number of frequency band channels on a wider electromagnetic spectrum. In an FH-CDMA system, a transmitter "hops" between available frequencies according to a specified algorithm, which can either be random or predefined (see Figure 2-1). The transmitter operates in synchronization with a receiver, which remains tuned to the same center frequency as the transmitter. A short burst of data is transmitted on a narrowband signal. The transmitter then tunes to another frequency, and transmits again. Therefore, the receiver is capable of hopping its frequency over a given bandwidth several times a second (20 hops per second in the WipLL system), transmitting on one frequency for a certain period of time, then hopping to another frequency and transmitting again. The WipLL system supports a hopping speed of 50 msec hopping intervals. TIME TIME 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8899101011111212 f1f1 f2f2 f3f3 f4f4 f5 f5 Frequency Each channel is 1 MHz wide Figure 2-1: An example of Frequency Hopping Spread Spectrum System Description WipLL Radio Technology: Physical Layer 25030311-08 Airspan Networks Inc. 2-3 The advantages of implementing FH-CDMA in the WipLL system include the following: „ Frequency Hopping Spread Spectrum (FHSS) is based on interference avoidance. Narrow band interference that does not meet the SNR blocks only a few hops, decreasing the throughput only partially. „ The required spectrum for an FHSS system is flexible in that it does not have to be contiguous. „ FHSS can coexist with other systems in the same spectrum band. „ To intercept transmission, a receiver must “know” the hopping sequence therefore, FHSS ensures security. „ Frequency diversity copes with the frequency selective fading and …

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