L9N-7880-BUHF Data Transceiver Module

AES 7880-B UHF DATA TRANSCEIVER USER MANUAL October 1, 2004 Notice: The exterior of any product containing this device must contain the following label: “Contains FCC ID : L9N-7880-B” Warning: This device must be professionally installed with appropriate power supply and antenna in order to ensure proper operation. The antenna gain must not exceed 10.5 dBi. Warning: This device may not be modified by the user. Any modifications not expressly approved by AES Corporation could void the user’s authority to operate the equipment. Warning: For FCC RF exposure compliance purpose, this device may not be incorporated into any product which operates within 20 cm of a person under normal operation. 1.0 Description The AES Model 7880-B UHF Data Transceiver permits data to be transmitted in the 450 ~ 470 MHz band of frequencies. The maximum output power is 120 mW. The data rate can be in the range of 2400 ~ 9600 baud. The 7880-B interfaces with an embedded microprocessor using a simple 4-wire serial Programming Port. The operating parameters are set by AES approved software. B2.0 Signals The 7880-B has 20 pins, consisting of 2 rows of 10 pins each. The following diagram (bottom view) shows the pin numbering scheme: The following table lists the signal pins and their function: Pin NameFunction 19 PSELSelect Programming Port (active low) 18 PCLKSerial Clock for Programming Port 17 PDIData Input for Programing Port 16 PDOData Output from Programming Port 2DCLKData Clock for Synchronous Data 3DIOData Input/Output for Synchronous Data 5VCCPower (+5 volts, 200 mA max) 1GNDGround 8“ 10 “ 11 “ 13 “ Pin 1Pin 20 20 “ 3.0 Calibration The 7880-B has a single adjustment – the Crystal Oscillator frequency. In order to adjust the Crystal Oscillator frequency, a suitable frequency counter must be attached to the antenna port. With the 7880-B set to transmit, using Manchester coding, the Crystal Oscillator may be adjusted until the average frequency measured by the frequency counter corresponds to the desired center frequency. The average frequency should be set to within 300 Hz of the desired value. Note: The frequency counter must be capable of measuring up to 470 MHz with an accuracy of 100 Hz in order to ensure proper calibration of the 7880-B. 4.0 Device Programming The operation of the 7880-B is controlled by the Programming Port. The protocol conforms to the Serial Peripheral Interface (SPI), originated by Motorola. The interface operates in a full duplex manner, with data shifted into the PDI pin at the same time as data is shifted out on the PDO pin. Data transfer cycles are initiated by the low-going transition of the PSEL pin; individual data bits are synchronized to the PCLK pin. B5.0 Data Communication The DIO pin is bidirectional. When the 7880-B is in transmit mode, the DIO pin becomes an input for the data to be transmitted. When the 7880-B is in receive mode, the DIO pin becomes an output. In both cases, the data is synchronized to the DCLK pin.

Response to TCB Findings 1. Please specify the DC voltages and currents in the final RF amp. stage as required by 2.1033(c)(8). Per the client - DC Voltage = 5V, DC Current < 200mA 2. A warning in the manual about the maximum allowed antenna gain is required as instructed by the FCC. See “LabHelp Clarifications” document. Revised manual attached. 3. A warning about the labeling requirement for the host is required in the manual as instructed by the FCC. The manual should instruct the installers of this module to label the exterior of the host so that it states the following; "Contains “FCC ID: L9N-7880-B”. Revised manual attached.

Following are the questions submitted to LabHelp about the requirements on modular licensed approvals and antenna gain limitations for 90.217. ----- Original Message ----- From: LabHelp To: [email protected] Sent: Monday, July 26, 2004 8:00 AM Subject: RE: Question on Licensed Modular Approvals Question 1: Can a low power mobile transmitter that will operate under the rule part 90.217 (exemption from Part 90 technical requirements) obtain a full modular approval given that it satisfies all the 8 points of the Public Notice DA 00-1407 ? The device is small in size ( 2 x 2 inches at most) and will be used in hosts such as utility meters, etc. Answer: No, the public notice applies only to Part 15 devices. However, we have allowed licensed modules according to the following: Licensed Modular Transmitters Licensed transmitters may be approved as modules for installation into other, final devices provided the following criteria are met: The final device is designed for mobile or fixed operation (Portable is not permitted - Reference TCB Exclusion List (17 July 2002) II(g). The maximum antenna gain to allow compliance with RF exposure requirements is listed on the Grant of Certification for the module The licensed module must have a FCC ID label on the module itself. That FCC ID label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily removed. If not, a second label must be placed on the outside of the final device that contains the following text: Contains “FCC ID: xxxyyyzzz” The Grant should include the following words in the device description or grant notes: “modular transmitter” or “transmitter module” Question 2: We would like to have some guidance on the output power limit of 120mW for 90.217 (exemption from technical standards) in the case of external antenna use, 1. Is this output power limit at the antenna terminal only? 2. What happens when the antenna gain is added and the EIRP exceeds the 120mW limit? Can this case be still considered to comply with 90.217 or should the device apply for entire Part 90 approval. 3. Is there a limit on the antenna gain if exceeding of 120mW EIRP is allowed? Answer: 1.) Yes, the output power of the device at the antenna terminal should not exceed 120 mW. 2.) If the conducted power is less than 120 m W, the device is exempt irregardless of antenna gain. Most Part 90 Grants list the conducted output power. 3.) Refer to the specific rule part for antenna gain requirements. You must perform all test required in Part 2 for certification even if there are no technical requirements.

REPORT: EE0563-2 FCC ID: L9N7880-B EXHIBIT: External Photos MODEL: 52-7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 1 of 1

Model 7880-B Transceiver www.aes-corp.com 7880-Label2.ai 7 july 2004 Print at 22% FCC ID: L9N-7880-B Label Material: Polyester Adhesive: Permanent Label shall adhere to device for lifetime of device.

REPORT: EE0563-2 FCC ID: L9N7880-B EXHIBIT: Internal Photos MODEL: 52-7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 1 of 1

Prediction of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01 where:S = power density P = power input to the antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna Maximum peak output power at the antenna terminal:20.00(dBm) Maximum peak output power at the antenna terminal:100(mW) Antenna gain(typical):10.5(dBi) Maximum antenna gain:11.22018454(numeric) Prediction distance:20(cm) Prediction frequency:450(MHz) MPE limit for uncontrolled exposure at prediction frequency:0.3(mW/cm^2) Power densit y at prediction frequency:0.223218(mW/cm^2) Maximum allowable antenna gain:11.7839111(dBi) 2 4R PG S π =

Curtis-Straus LLC is accredited by the American Association for Laboratory Accreditation for the specific scope of accreditation under Certificate Number 1627-01. This report may contain data which is not covered by the A2LA accreditation. _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Test Report Report No EE0563-2 Client AES Corporation 285 Newbury Street Peabody, MA 01960 Phone 978-535-7310 Fax 508-535-7313 FRN 0003-6214-63 Model 52-7880-B FCC ID L9N7880-B Equipment Type Licensed Non-Broadcast Station Transmitter Equipment Code TNB Results As detailed within this report Prepared by _____________________ Evan Gould – Test Engineer Authorized by __________________________ Michael Buchholz – EMC Manager Issue Date Conditions of issue This Test Report is issued subject to the conditions stated in ‘terms and conditions’ section of this report. REPORT: EE0563-1 FCC ID: L9N7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 2 of 22 Table Of Contents Summary......................................................................................................................... 3 Test Methodology............................................................................................................ 3 EUT Configuration........................................................................................................... 4 Occupied Bandwidth....................................................................................................... 5 Peak Unmodulated Transmitter Carrier Power................................................................ 8 Emission Masks............................................................................................................ 10 Frequency Stability........................................................................................................ 13 Radiated Spurious Emissions....................................................................................... 16 Test Equipment Used.................................................................................................... 17 Terms And Conditions................................................................................................... 18 A2LA Accreditation........................................................................................................ 20 REPORT: EE0563-1 FCC ID: L9N7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 3 of 22 Summary This report shows the results of testing the AES Model 7880-B UHF transceiver module to 47 CFR 90.217 The transmitter is able to operate at frequencies in the range 402- 470MHz, and supports data rates up to 9600baud. The modulation employed is FSK. Test Methodology Radiated spurious emissions testing was performed according to the procedures specified in ANSI/TIA-603-B-2002. Frequency range investigated: 30MHz – 5GHz Measurement distance: 3m REPORT: EE0563-1 FCC ID: L9N7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 4 of 22 EUT Configuration EUT Configuration Work Order: E0563 Company: AES Corporation Company Address: 285 Newbury Street Peabody, MA 01960 Contact: Dave Townzen Person Present: Dave Townzen MNSN EUT: 52-7880-B1 EUT Description: UHF Transceiver EUT Max Fre quency: 470MHz Support Equipment: MNSN BK Precision DC p/s1730- LaptopWinBookXL10807795 demo board (supplies power and control interface) CC1020Rev 2.2 EUT Cables: QtyShielded?LengthFerrites Demo Board Cables DB25 parallel1Yes2mNo DC wires1 pairNo0.5mNo Unpopulated EUT Ports: QtyReason none Software / Operating Mode Description: Operating transmitter with SmartRF Studio to set center frequency, baud rate, frequency separation, etc. REPORT: EE0563-1 FCC ID: L9N7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 5 of 22 Occupied Bandwidth ANALYZER PLOTS Low – 2400baud Manchester (4.95kHz freq sep) Mid – 2400baud Manchester (4.95kHz freq sep) REPORT: EE0563-1 FCC ID: L9N7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 6 of 22 High – 2400baud Manchester (4.95kHz freq sep) Low – 9600baud Manchester (4.5kHz freq sep) REPORT: EE0563-1 FCC ID: L9N7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 7 of 22 Mid – 9600baud Manchester (4.5kHz freq sep) High – 9600baud Manchester (4.5kHz freq sep) REPORT: EE0563-1 FCC ID: L9N7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 8 of 22 Peak Unmodulated Transmitter Carrier Power REQUIREMENT The output power limit that must be met in order to qualify for the exemption in 90.217 is 120mW (20.79dBm). The 6dB bandwidth of the CW signals measured is less that 1kHz, so a RBW of 1kHz was used to capture the peak power. MEASUREMENTS Peak Output Power Curtis-Straus LLC Engineer: Evan Gould Company: …

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REPORT: EE0563-2 FCC ID: L9N7880-B EXHIBIT: Setup Photos MODEL: 7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 1 of 2 Antenna Port Conducted Emissions Frequency Stability REPORT: EE0563-2 FCC ID: L9N7880-B EXHIBIT: Setup Photos MODEL: 7880-B _____________________________________________________________ _____________________________________________________________ Curtis-Straus LLC • 527 Great Road • Littleton, MA • TEL (978) 486-8880 • FAX (978) 486-8828 Page 2 of 2 Radiated Spurious Emissions Substitution Method