L9N-7880LC2BRF DATA RADIO

52-7880LC2B UHF DATA TRANSCEIVERS PLL SYNTHESIZED (EEPROM) Service Manual HERMES ELECTRONICS CO., LTD. HE C TABLE OF CONTENS 1. SPECIFICATION .............................................................................2 2. CONNECTIONS AND OPERATION DESCRIPTION........................3-4 3. CIRCUIT DESCRIPTION ..............................................................5-7 4. PERFORMANCE TEST AND ALIGNMENT.................................8 5. TEST EQUIPMENT CONFIGURATION .......................................9 6. TRANSMITTER PERFORMANCE TEST ............................................10-12 7. PARTS LIST ................................................................................13-16 8. PROGRAMMER INSTRUCTION......................................................17-21 9. PRINT CIRCUIT BOARD LAYOUT.....................................................22-24 10. PARTS ASSEMBLY .......................................................................25 11. BLOCK DIAGRAM ......................................................................26 12. SCHEMATICS DIAGRAM...............................................................27 PAGE1 1. SPECIFICATION GENERAL SPECIFICATIONS POWER SOURCE ..............................................13.80VD.C. TEMPERATURE RANGE STORAGE ..............................................80°C maximum -40°C min,25°C nominal OPERATING ...........................................70°C maximum -20°C min. ANTENNA IMPEDANCE .......................................50Ω FREQUENCIES OF OPERATION .............................406-430MHZ,450-470MHZ FREQUENCY TOLERANCE AND STABILITY ............±1.5PPM CHANNEL CAPABILITY ........................................1 NOMINAL DIMENSIONS ........................................107㎜(L)X 54㎜(W)X 32㎜(H) WEIGHT ................................................................101g RADIO DATA TRANSMITTER PERFORMANCE SPECIFICATION RF OUTPUT POWER ............................................2.5W MODULATION TYPE ..............................................FM CHANNEL SPACING ..............................................25KHZ/12.5KHZ/6.25KHZ DEVIATION (25KHZ CH SPACING)...............................3.35 KHZ@106mVrms input MAX. DEVIATION............For 12.5 kHz channel spacing, Peak deviation is not greater than 2.5 kHz. ............For 25 kHz channel spacing, Peak deviation is not greater than 5 kHz. TRANSMIT ATTACK TIME ..............................＜25 mS CURRENT CONSUMPTION [email protected] RADIO DATA RECEIVER PERFORMANCE SPECIFICATION SENSITIVITY...............................................minimum 12dB SINAD @0.35uV QUIETING.................................................. minimum 20dB @0.5uV no modulation AUDIO POWER OUTPUT..............................250mV~500mVrms @600 ohms load AUDIO DISTORTION....................................less than 5%@ -47dBm CARRIER DETECT OFF..................................> -117dBm CARRIER DETECT ON...................................< -120dBm HUM AND NOISE..........................................45dB SELECTIVITY...............................................70 dB SPURIOUS RESPONSE....................................70 dB CURRENT CONSUMPTION ...........................60mA PAGE2 EXTERNAL CONNECTIONS 1. - 50Ω BNC SOCKET 2. - 9 WAY 〝 D 〞TYPE PLUG(J2) 2. CONNECTIONS AND OPERATION D-TYPE INTERCONNECTIONS PIN FUNCTION TYPE RANGE DESCRIPTION J2-1 DATA_IN ANALOGUE 106mV EXTERNAL MODULATION INPUT J2-2 DATA_OUT ANALOGUE 250~350mV RECEIVER AF OUTPUT J2-3 PTT INPUT 0V/+5V TRANSMIT ENABLE J2-4 GND GND 0V GND J2-5 B+ V+ +13.8V POWER SUPPLY J2-6 CDS OUTPUT OPEN/SHORT RF CARRIER DETECT J2-7 NC J2-8 PGM_DATA INPUT 0V/NC PROGRAMMER DATA INPUT J2-9 PGM_ENB INPUT 0V/5V PROGRAMMING ENABLE PAGE3 U4(52-7880LC2) CONNECTIONS CONNECTIONS AND OPERATION PIN FUNCTION TYPE RANGE DESCRIPTION JP1-1 DATA_IN ANALOGUE 106mV EXTERNAL MODULATION INPUT JP1-2 DATA_OUT ANALOGUE 250~350mV RECEIVER AF OUTPUT JP1-3 PTT INPUT 0V/+3.3V TRANSMIT ENABLE JP1-4 GND GND 0V GND JP1-5 B+ V+ +6.0V POWER SUPPLY JP1-6 CDS OUTPUT OPEN/SHORT RF CARRIER DETECT JP1-7 PGM_ENB INPUT 0V/3.3V PROGRAMMING ENABLE JP1-8 PGM_DATA INPUT 0V/NC PROGRAMMER DATA INPUT JP1-9 PIN FUNCTION TYPE RANGE DESCRIPTION JP2-1 Channel 1 DIGITAL 0V/+3.3V Channel select pin JP2-2 Channel 2 DIGITAL 0V/+3.3V Channel select pin JP2-3 Channel 4 DIGITAL 0V/+3.3V Channel select pin JP2-4 Channel 8 DIGITAL 0V/+3.3V Channel select pin JP2-5 GND GND 0V GND JP2-6 MCLR I 0V/+3.3V Programming MCU software JP2-7 PGC I/O 0V/3.3V Programming MCU software JP2-8 PGD I/O 0V/+3.3V Programming MCU software JP2-9 VCC 3.3V 3.3V VCC PAGE4 3. CIRCUIT DESCRIPTION TRANSMITTER The transmitter is comprised of: • Audio frequency connections from JP1 pin 1 • Frequency Synthesizer • Transmitter Audio frequency connections In the TX path , audio signal can be send into the chip RDA1846 through AC coupling capacitors. Frequency synthesizer circuit With data received from the EEPROM (U3) the frequency synthesizer circuit controls and Produces the RF carrier frequency for the transmitter during transmit and the local oscillator frequency for the receiver. The frequency synthesizer circuit is comprised of: Synthesizer The U1 (RDA1846) generates the local oscillator and transmitter signal . all building blocks are fully integrated without any external components. Frequency can be programmed through the serial interface by the MCU (U3) 26 MHZ TCXO X1 is VCTCXO, which provide stable oscillator of 26 MHZ to U1. Frequency adjustment is provided by VR1. DC REGULATOR The DC Regulator U4, converts the +6.0 V to a 3.3 V supply . This is used to provide the MCU and U1. PAGE5 Transmitter The transmitter comprises: PA Buffer PA Module Amp Buffer When the radio is in transmit mode the U1 is generated RF signal pass to the buffer/pre-amplifier Q1 and Q2 associated components. PA module The Q2 output signal is passed to Q3 via a matching network consisting of Inductor L5 , L15 and C32 and C34. Q3 is power …

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Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 86 of 98 Pictures External Photos Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 87 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 88 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 89 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 90 of 98

FCC and IC ID label location Model no.: 52-7880LC2B

Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 91 of 98 Internal Photos Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 92 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 93 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 94 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 95 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 96 of 98 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 97 of 98

Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Page 80 of 81 12. Maximum Permissible Exposure 12.1 Applicable Standard Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy levels in excess limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as a mobile device whereby a distance of 0.52 m normally can be maintained between the user and the device. 12.2 MPE Calculation Method E ＝ Electric field (V/m) P ＝ output power (W) G ＝ EUT Antenna numeric gain (numeric) d ＝ Separation distance between radiator and human body (m) The formula can be changed to Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Page 81 of 81 Max output power (W) Antenna numeric Gain Power Density(S) (mW/cm²) Limit of Power Density (S) (mW/cm²) Test Result 2.91 3.02 0.258 0.27 Complies From the peak EUT RF output power, the minimum mobile separation distance, d=0.52 m, as well as the gain of the used antenna, the RF power density can be obtained.

of Applicant: AES Corporation Address: 285 Newbury Street, Peabody, MA01960 USA Tested and Prepared by Worldwide Testing Services (Taiwan) Co., Ltd. FCC Registration No.: 930600 Industry Canada filed test laboratory Reg. No. IC 5679A-1 A2LA Accredited No.: 2732.01 Report No.: W6M21210-12822-C-1 6F, NO. 58, LANE 188, RUEY-KUANG RD., NEIHU TAIPEI 114, TAIWAN, R.O.C. TEL: 886-2-66068877 FAX: 886-2-66068879 E-mail: [email protected] FCC PART 90 TEST REPORT for RF DATA RADIO Model No.: 52-7880LC2B FCC ID: L9N-7880LC2B Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Page 1 of 81 TABLE OF CONTENTS 1. General Information...................................................................................................................3 1.1 Notes ...........................................................................................................................................3 1.2 Testing laboratory .......................................................................................................................4 1.2.1 Location ..............................................................................................................................4 1.2.2 Details of accreditation status .............................................................................................4 1.3 Details of approval holder...........................................................................................................5 1.4 Application details ......................................................................................................................5 1.5 General information of Test item................................................................................................5 1.6 Test standards .............................................................................................................................6 2. Technical test ...............................................................................................................................7 2.1 Summary of test results...............................................................................................................7 2.2 Test environment ........................................................................................................................7 2.3 Description of Tested System .....................................................................................................7 2.4 Test Equipment List ....................................................................................................................8 2.5 General Test Procedure.............................................................................................................12 3. Test results (enclosure) .............................................................................................................13 4. Modulation Characteristics .....................................................................................................14 4.1 Test procedure...........................................................................................................................14 4.2 Test Setup .................................................................................................................................14 4.3 Test results ................................................................................................................................15 4.3.1 Audio Frequency Response ..............................................................................................15 4.3.2 AUDIO INPUT VERSUS MODULATION ....................................................................19 4.3.3 Necessary Bandwidth........................................................................................................23 5. Frequency stability ...................................................................................................................30 5.1 Test Procedures .........................................................................................................................30 5.2 Test Setup .................................................................................................................................30 5.3 Test Result ................................................................................................................................31 6. Transmitter Output Power ......................................................................................................33 6.1 Test Procedures .........................................................................................................................33 6.2 Test Setup .................................................................................................................................33 6.3 Test Result ................................................................................................................................34 6.3.1 Conducted Power ..............................................................................................................34 6.3.2 Radiated Power .................................................................................................................34 6.4 Limit..........................................................................................................................................37 Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Page 2 of 81 7. Emission masks .........................................................................................................................38 7.1 Test Procedures .........................................................................................................................38 7.2 Test Setup .................................................................................................................................38 7.3 Test Result .......…

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Registration number: W6M21210-12822-C-1 FCC ID: L9N-7880LC2B Worldwide Testing Services(Taiwan) Co., Ltd. Appendix page 98 of 98 Set Up Photo of Radiated Emission