NTTSX1126cpe head end

tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] Thomas N. Cokenias EMC & Radio Type Approvals Test & Consulting Services for Commercial, Military, International Compliance P.O. Box 1086 El Granada, CA 94018 25 July 2000 FCC Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Attention: Applications Examiner Re: Correction to FCC ID Form 731 Confirmation Number: EA98230 FCC ID as Submitted: NTT1126 Correct FCC ID: NTTSX1126 To whom it may concern, The FCC ID for the referenced product was entered incorrectly. Please modify the form 731 to show the correct FCC ID: NTTSX1126, consistent with the label and other documentation. Thank you for your attention to this matter, and I apologize for the inconvenience. Best regards Tom Cokenias EMC Consultant/Agent for Watkins Johnson

SX1126 Wireless Transceiver Front View with Ante nna Front View witho ut Ante nna Botto m View Open Uni t Open Unit with Cover Board Front Board Front Board Back

Watkins JohnsonFCC ID: NTTSX1126 RF Hazard Information (sec.1.1307) Refer to p10 of User Manual for MPE calculations for SX1126 with integrated 22.5 dBi antenna.

Watkins-Johnson Co.FCC ID: NTTSX1126 1 of 44 EXHIBITS EXHIBIT 1:Letter Requesting Confidentiality under Sec. 0.457(d) EXHIBIT 2: Product Description and Operation Overview EXHIBIT 3:Information for which Confidentiality is Requested Schematics Block Diagrams Theory of Operation EXHIBIT 4:Product Photographs EXHIBIT 5:User Manual and FCC ID Label EXHIBIT 6:RF Hazard Information per Sec. 1.1307 EXHIBIT 7: Report of Measurements EXHIBIT 8: Data Graphs – Emissions Masks EXHIBIT 9: IF Card TX Signals to RF Module EXHIBIT 10: HP84125C Output Display, Noise Floor Watkins-Johnson Co.FCC ID: NTTSX1126 2 of 44 EXHIBIT 1:Letter Requesting Confidentiality under Sec. 0.457(d) Watkins-Johnson Co.FCC ID: NTTSX1126 3 of 44 Thomas N. Cokenias EMC &Radio Approvals Test & Consulting Services for Commercial, Military, International Compliance P.O. Box 1086 El Granada, CA 94018 21 July 2000 FCC Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Attention: Application Examiner Reviewing Engineer Re: Request for confidentiality per Section 0.459 of FCC Rules Applicant: Watkins-Johnson Company FCC ID: NTTSX1126 To whom it may concern, Request is hereby submitted, on behalf of my client Watkins Johnson Co., to withhold from public review certain portions of the application for equipment certification for the referenced FCC identifier. In particular, the following sections of the application and report are requested to be kept confidential: Schematics Block diagrams Theory of operation (P2P Architecture) Rationale for request for confidentiality: Watkins Johnson has invested considerable time and materials in research and development to produce the referenced product. Disclosure of the confidential portions of this application to competitors would give them competitive advantage in developing similar products. The $135 fee for confidentiality has been submitted along with the fee for certification. If you have questions or need further information, please contact the undersigned. Sincerely, THOMAS N. COKENIAS EMC Consultant/Agent for Watkins Johnson Co. Watkins-Johnson Co.FCC ID: NTTSX1126 4 of 44 Tel 650 726 1263 fax 650 726 [email protected] Watkins-Johnson Co.FCC ID: NTTSX1126 5 of 44 EXHIBIT 2:Product Description and Operation Overview Watkins-Johnson Co.FCC ID: NTTSX1126 6 of 44 The Watkins Johnson FCC ID: NTTSX1126 is a UNII transceiver operating under the provisions of Part 15 of the Rules. The product functions as a point to point (P2P) wireless router. Refer to the system module diagram below: Product development strategy is to follow a modular approach. Digital data I/O for the initial version of the system will be a line card that will fit into a standard router chassis. For test purposes, a Tektronix arbitrary waveform generator will simulate the signal output of the router/line card combination. The IF card up-link performs the modulation functions of the system. A 330 MHz signal is modulated with the digital data stream using Orthogonal Frequency Division Multiplexing (OFDM) techniques. The system is capable of producing channel bandwidths in 6 MHz multiples. The system will be configurable for use with 6 MHz and 12 MHz channel bandwidths. Digital data I/O AB “Flint” IF Card SPI IF Card RS 232 Cable PC Controlle r -48volts UNII RF Head RS 232 Cable Bias “T” Watkins-Johnson Co.FCC ID: NTTSX1126 7 of 44 For the down-link signal, the IF card demodulates the receiver IF signal from the RF head and routes the demodulated digital information to the digital I/O card. The bias “T” provides DC and the 324 MHz IF signal on a single coaxial cable for routing to the RF head. The RF head produces the RF transmit link at 5.725 - 5.825 GHz , and houses the receiver LNAs, receiver local oscillator, and the receiver IF bandpass filters and IF amplifiers. The RF head also houses the TX-RX diplexer. The PC controller and RS 232 cables are for system control and set-up for testing purposes. The antenna shown in the diagram is specified but not supplied by Watkins-Johnson. The –48 VDC supply shown in the diagram is telephone central office (CO) power or a customer provided supply. SPECIFICATIONS RF Head Frequency range: 5.725 - 5.825 GHz Power output:25 dBm maximum (5-25 dBm in 1 dB steps) Channel Bandwidth:1.5/3/6 MHz, configurable IF Head Frequency range:330 MHz 24 MHz clock Power output:330 MHz: -13 dBm nominal (programmable) 24 MHz: -12 dBm nominal Data transfer rate, air link:22 Mbs (6 MHz channels) Modulation:OFDM (Orthogonal Frequency Division Multiplexing) 6 MHz channel: 512 tones, 64 QAM A description of the theory of operation and product configuration is found in an attachment to this application and report. Watkins-Johnson Co.FCC ID: NTTSX1126 8 of 44 System Interconnection - Refer to separate attachment Watkins-Johnson Co.FCC ID: NTTSX1126 9 of 44 EXHIBIT 3:Information for which Confidentiality is requested Schematics Block Diagrams Theory of Operations Watkins-Johnson Co.FCC ID: NTTSX1126 10 of 44 EXHIBIT 4: Product Photographs Refer to separate attachment Watkins-Johnson Co.FCC ID: NTTSX1126 11 of 44 EXHIBIT 5:User Manual and FCC ID Label -Refer to separate attachments Watkins-Johnson Co.FCC ID: NTTSX1126 12 of 44 EXHIBIT 6: RF Hazard Information Per Sec. 1.1307 For transmitters operating in the 5725-5825 MHz frequency range, paragraph 1.1310 limits maximum permissible exposure (MPE) to 1 mW/cm2 for uncontrolled environments. The maximum distance from the antenna at which MPE is met or exceeded is calculated from the equation relating field strength in V/m, transmit power in watts, transmit antenna gain, and separation distance in meters: E,V/m = ( √ (30*P*G))/d Power density, mW/m2 = E 2 /3770 E for MPE 1mW/m2 = 61.4 V/m Simplifying and rearranging terms: d = ( √ (30*P*G))/61.4 Converting to decibels: 20 log d = 10 log 30 + 10 log P watts + G dBi -35.8 dB 20 log d = 14.77 + PdBm - 30 dB -35.8 + GdBi 20 log d = P dBm + G dBi -51 ; d = 10^(PdBm+GdBi-51)/20 AntennaPower into antenna MPE distanc…

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