BRWQUATTROJ-Line Quattro 4 Channel FM Radio SystemPasr

4-CHANNEL FM RADIO SYSTEM INSTRUCTION MANUAL MANUFACTURED BY JR REMOTE COMTROL 1 QUATTRO MANUAL 1. Introduction to the Quattro Radio System. . . . 1 2. System Specifications. . . . . . . . . . . . . . . . . . . . . 2 3. Quattro Transmitter 3.1 Transmitter Features . . . . . . . . . . . . . . . . . . . . 2 3.2 Transmitter Layout . . . . . . . . . . . . . . . . . . . . 2-3 3.3 Transmitter Specifications . . . . . . . . . . . . . . . . 3 3.4 Control Stick Length Adjustment . . . . . . . . . . 3 3.5 Neck Strap Attachment . . . . . . . . . . . . . . . . . . 3 4. NER-600 Receiver 4.1 Receiver Features . . . . . . . . . . . . . . . . . . . . . . . 4 4.2 Receiver Layout . . . . . . . . . . . . . . . . . . . . . . . . 4 4.3 Receiver Specifications . . . . . . . . . . . . . . . . . . 4 5. 577 Servo 5.1 Servo Features . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.2 Servo Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.3 577 Servo Specifications . . . . . . . . . . . . . . . . . 5 6. Airborne (Receiver) Battery Pack. . . . . . . . . . . . . 5 7. Charger Specifications. . . . . . . . . . . . . . . . . . . . . . 6 8. Charging Your Quattro Radio System Prior to Installation 8.1 Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . 6 TABLE OF CONTENTS 1. INTRODUCTION TO THE J-LINE QUATTRO RADIO SYSTEM Thank you for purchasing the J-line Quattro 4-Channel FM Radio System. This unit has been designed to provide the modeler with a high quality, user-friendly radio system that can be depended upon for years to come. It is important that you carefully read this manual before attempting to operate your Quattro System. Please pay particular attention to Section 8, Charging Your Quattro Radio System Prior to Installing. 9. Pre-Installation System Preparation 9.1 Flight Pack Connections. . . . . . . . . . . . . . . . . . 7 9.2 Transmitter Preparation . . . . . . . . . . . . . . . . . . 7 9.3 577 Servo Preparation . . . . . . . . . . . . . . . . . . . 8 9.4 System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 8 10. Flight Pack Installation 10.1 Installation Suggestions . . . . . . . . . . . . . . . . 9 10.2 Servo Reversing . . . . . . . . . . . . . . . . . . . . . . 10 10.3 Setting Reversing Switches . . . . . . . . . . . . . 10 10.4 Adjusting Control Surface Travel. . . . . . . . . 11 11. Pre-Flight Information 11.1 Quattro Trainer System . . . . . . . . . . . . . . . . 12 11.2 Operating the Trainer System . . . . . . . . . . . 12 11.3 Range Testing Your Model . . . . . . . . . . . . . 12 12. General Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 13. Daily Flight Checks. . . . . . . . . . . . . . . . . . . . . . . . 13 14. Warranty and Service Information 14.1 Warranty Coverage . . . . . . . . . . . . . . . . . . . . 14 14.2 Repair Service Instructions . . . . . . . . . . . . . 14 15. Frequency Chart. . . . . . . . . . . . . . . . . . . . . . . . . . 15 2 QUATTRO MANUAL 3. QUATTRO TRANSMITTER TRANSMITTER FEATURES TRANSMITTER LAYOUT • Computer-designed, ergonomically styled case • Servo reversing on all 4 channels (page 12) • Adjustable control stick length (page 5) • Trainer system feature compatible with all current JR radio systems • Easy-to-read transmitter LED battery voltage indicator • 9.6V 600mAh NiCad transmitter battery pack • Power output approximately 750mw System NameQuattro Transmitter BodyNET-E104 ReceiverNER-600 ChargerNEC-221 Airborne Battery4.8V 600mAh NiCad ServosNES-577 x 4 AccessoriesMini Switch Servo Accessories 12" Aileron Extension Instruction Manual 2. SYSTEM SPECIFICATIONS 3.1 3.2 Transmitter LED Battery Voltage Indicator Neck Strap Attachment (JRPA023 Optional JR Neck Strap) Throttle/Rudder Stick Trainer Button Transmitter Antenna Carrying Bar Elevator Trim Aileron Trim Elevator/Aileron Stick Power Switch Throttle Trim Rudder Trim IMPORTANT Transmiter Battery Voltage LED Indicator Low: Do not fly Mid: System should be recharged Full: System OK to fly Low Mid Full Red Orange Green 3 QUATTRO MANUAL TRANSMITTER LAYOUT 3.2 TRANSMITTER SPECIFICATIONS CONTROL STICK LENGTH ADJUSTMENT NECK STRAP ATTACHMENT Model NumberNET-E104 RF72MHz ModulationPPM (FM) There is an eye hook on the front of the transmitter for attaching an optional neck strap (JRPA023). The eye hook is precisely positioned (see Section 3.2) so that the transmitter will be perfectly balanced when a neck strap is used. To adjust the control stick length, use a 2mm Allen wrench to unlock the set screw located inside the end of the control stick. Turn the set screw counterclockwise to loosen it, then turn the knurled portion of the stick to adjust the length. Counterclockwise will lengthen the stick and clockwise will shorten it. After the control stick(s) has been adjusted to suit your flying style, tighten the set screw. LOOSEN TIGHTEN SET SCREW 3.3 3.4 3.5 9.6V 600mAh NiCad Transmitter Battery Pack Trainer Cord Jack Transmitter Frequency Crystal Set Screw Loosen Tighten RudderElevator Aileron Throttle Carrying Bar Servo Reversing Switches (Located behind Transmitter Battery Pack) Output Power Approximately 750mw Current Drain150mAh Power Source1.2V x 8 NiCad (9.6V 600mAh) Output Pulse1.0 –2.0ms Back Cover 4 QUATTRO MANUAL RECEIVER SPECIFICATIONS Model NumberNER-600 Type6-Channel FM ABC&W Frequency72MHz Sensitivity (Microseconds) 5ms Minimum Selectivity8KHz/50db Weight1 oz. Size (W x L x H)1.43" x 2.06" x .55" Receiver Antenna39" for all Aircraft Frequencies RECEIVER FEATURES • Patented ABC&W noise rejection system for increased interference protection • Compact, lightweight design provides easy installation into most model designs • State-of-the-art surface mount technology (SMT) RECEIVER LAYOUT 4. NER-600 RECEIVER BATT AUX 1 GEAR RUDD ELEV AILE THRO 6 CH 72MHz FM RECEIVER ABC&W INTERFERENCE PROTECTION SYSTEM 4.1 4.2 4.3 Antenna R600 Receiver Battery (Switch Harness) Rudder Receiver Frequency Crystal Elevator Aileron Throttle (Engine) 5 QUATTRO MANUAL 5. 577 SERVO …

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April 28,2000 Federal Communications Commission Equipment Authorization Division, Applications Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 RE) FCC ID: BRWQUATTRO (EA97447) To whom it may concern; Please refer to the additional information listed below while reviewing the BRWQUATTRO System. 1) Section 95.645 (b) states that plug-in crystals must not be accessible to the user. Indicate whether or not crystals are accessible to the user. Although the transmitter crystal is visible from the back of the transmitter, each crystal is glued in place prior to shipment making it a permanent installation. Consumer removal of the crystal will normally result in damage to the crystal. Therefore, frequency changes are done at the service center only. 2) The Manual must contain warnings per section 95.653 A) Please refer to the manual attachment for this information B) All content for operation is contained in the instruction manual. 1) All instructions are contained in the instruction manual. 2) There are no adjustments accessible to the user that would be in violation with the FCC rules, except as noted in the section #3 below. 3) Noted. We will be adding the following information to the instruction manual under “Frequency Chart”: “Note: The Federal Communications Commission (FCC) requires that changes in radio frequency must be performed by an authorized service technician only (Horizon Service Center). Any frequency changes made by a non-certified technician may result in a violation of the FCC rules” 4) This section is not applicable to our use. If there is any further information required, please contact me directly at: Horizon Hobby Distributors ATTN: Len Sabato Fax: 217-355-0058 Phone: 217-352-1958 Ext. 454 [email protected] Best Regards ; Len Sabato

Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO T A B L E O F C O N T E N T S 1.0 INTRODUCTION 1.1 Definition 1.2 Application 1.3 Construction 2.0 ENCODER THEORY OF OPERATION 3.0 RF TRANSMITTER SECTION THEORY OF OPERATION 3.1 General 3.2 Block Diagram 4.0 FAILURE ANALYSIS 5.0 APPENDICES 5.1 Transmitter Block Diagram 5.2 Transmitter Schematic Diagram 5.3 Transmitter Photographs and ID Labels 5.4 Transmitter Tune Up Procedure 5.5 Quarts Crystal Specifications 5.6 Test Data Page 1 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 1.0 INTRODUCTION 1.1 Definition The Model QUATTRO is a transmitter for the Remote Control (R/C) of models such as airplane, helicopters, cars, boats, etc. This Transmitter is for FM System, available for the PPM(Pulse Position Modulation). This Transmitter is a part of the Horizon Hobbies PPM "family" of Remote Control Transmitters which at this time consists of: Transmitter Model # FCC ID # F400 NET-E104 BRWNET-E104 F400EX BRWF400EX XF421EX BRWXF421EX Separate Applications for each transmitter and for the receiver is submitted as required by the Commission. The Manufacturer, Japan Remote Control Company (JR), Manufactures all transmitters and receivers. The PPM family of R/C systems is exported by JR to the united States of America, and several European and Asian Countries. The Applicant for this Equipment Authorization, HORIZON HOBBIES, INC. will, following receipt of Grant of Equipment Authorization, import only those versions of these R/C radios which are allowed for use in the USA under the Rules and Regulations of the Federal Communications The 72 - 73 MHz version of this transmitter is the subject of this Application; these are the units which will be offered for sale to the general public. Page 2 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 1.2 Application The Model QUATTRO R/C transmitter utilizes "Frequency Modulation" to convey the PPM encoded position of its control sticks (joysticks) and toggle switches to its companion R/C receiver, where the PPM encoded pulse train is demodulated, decoded, and supplied to a number of servo-mechanisms for positioning of control surfaces, throttle etc. on the model. The Frequency-Shift-Keying of the transmitter carrier takes place in the rhythm of the PPM pulse train. Transmitter and receiver are very narrow band units; they have been designed to comply with the European requirements of 10 KHz channel spacing. As a result, they operate safety in the present 20 KHz channel spacing environment allowed at this time in the USA. 1.3 Construction The Model QUATTRO Transmitter all consists of a plastic case. (Reference is made to Fig. 5.1, Transmitter Block Diagram) * control sticks and control switches * a 9.6V rechargeable (Nicad) battery * a commutator to sample the analog control voltages in sequence * an analog-to-digital converter (ADC) * a microprocessor ( u p) to create the PPM pulse train * a modulator driver stage * a RF power stage * a telescopic antenna This Transmitter is to be made available by the JAPAN and USA on those carrier frequencies in the 72 - 73 MHz frequency band which are at present authorized for R/C use. Page 3 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 2.0 ENCODER THEORY OF OPERATION Reference is made to Figure 5.1, Transmitter Block Diagram. The functions of the encoder are to: * accept the analog voltages from the control inputs (joysticks, toggle switch). * process the analog voltages to create control mixing, adding, reversing, etc., as desired by the user. * sample these voltages in a cyclic rhythm under control of the system's internal timing generator. (This process is called commutation.) * process these analog voltages into binary weighted digital control words by means of an Analog-to-Digital Converter (ADC). * store these digital representations of the analog control input into a temporary memory (RAM). * supply this serial data stream to a buffer-driver for modulation of the RF Transmitter. * provide "housekeeping" of the encoding process by means of a quarts crystal controlled internal clock. * provide supply voltages to the RF section (Vcc = 9.6V battery voltage; Vreg = 6.0V regulated voltage). The entire program which controls the timing housekeeping, parallel-to-serial conversion process, and insertion of synchronization words and error detection codes is governed by a Central Processing Unit (CPU) under control by an internally stored program residing in Read-Only Memory (ROM). The CPU, RAM and ROM are all part of a single-chip microprocessor ( u p). Resolution of the Analog-to-Digital conversion process is nine (9) bits for a control accuracy of 1:2 9 or 0.2 percent. Page 4 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 3.0 RF SECTION THEORY OF OPERATION 3.1 General Reference is made to Figure 5.1, Transmitter Block Diagram. The Horizon Hobbies Model QUATTRO R/C Transmitter is a tow sticks type Transmitter. It operates on any of the R/C frequency (Channels) allowed by the Commission in the 72 -73 MHz frequency band. Selection of the desired RF channel is made by Quarts crystal. This transmitter employs Frequency-Sift-Keying (FSK) of the carrier frequency, whereby the output frequency is either low or high due to the symmetrical FSK modulation process, the (center) output frequency cannot be directly measured, but must be calculated by taking the average of the high and low frequency states. m m m = shift from center frequency m = approx. 1.8 KHz f f f low c high f low + f high f carrier = 2 The peak-to-peak deviation of the FSK signal is approximately 4 KHz ("sliver modulation") Because of the unfamiliarity of the general public with the term FSK, this modulation technique is commonly named FM. Page 5 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 3.2 Block Diagram (Reference is made to Figure 5.1) The (up to) four control potentiometers are at the right side of the schematic drawing. The …

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A-007-00-C Page 1 of 25 KEC Ikoma Testing Laboratory 12128 Takayama-cho Ikoma-city Nara 630-0101 Japan Designated by Ministry of international Trade and industry KANSAI ELECTRONIC INDUSTRY DEVELOPMENT CENTER HEAD OFFICE IKOMA TESTING LABORATORY 6-8-7 NISHITENMA 12128 TAKAYAMA-CHO KITA-KU OSAKA 530-0047 JAPAN IKOMA-CITY NARA 630-0101 JAPAN Corporate Juridical Person TEST REPORT Report No.A-007-00-CDate: 3 March 2000 This test report is to certify that the tested device properly complies with the requirements of: FCC Rules and Regulations Part 95 : Radio Control (R/C) Radio Service. The tests necessary to show compliance to the requirements were performed and these results met the specifications of requirement. The results of this report should not be construed to imply compliance of equipment other than that, which was tested. Unless the laboratory permission, this report should not be copied in part. 1. Applicant Company Name:JAPAN REMOTE CONTROL CO., LTD. Mailing Address:2-2-12, EIWA, HIGASHIOSAKA-CITY, OSAKA, 577-0809 JAPAN 2. Identification of Tested Device Type of Device:Radio Control (R/C) Radio Service. Kind of Equipment Authorization:: DoC : Certification: Verification FCC ID:BRWQUATTRO Device Name:FM 4 CHANNEL TRANSMITTER Trade Name: JR PROPO Model Number: QUATTRO Serial Number:No.1: Prototype : Pre-production : Production Date of Manufacture:February, 2000 3. Test Items and Procedure : Measurement of RF Power Output (Substitution Method) : Modulation Characteristics : Necessary Bandwidth : Emission Bandwidth : Measurement of Field Strength of Spurious Radiation : Frequency Stability Measurement Above all tests were performed under: FCC Part 2 Sec2.1046, Sec2..1047, Sec2.1049, Sec2.1053, Sec2.1055 and Sec2.1057. : without deviation, : with deviation(details are found inside of this report) 4. Date of Test Receipt of Test Sample: 14 February 2000 Test Completed on: 1 March 2000 Eizo Hariya General Manager of Ikoma Testing Laboratory A-007-00-C Page 2 of 25 KEC Ikoma Testing Laboratory 12128 Takayama-cho Ikoma-city Nara 630-0101 Japan Table of Contents 1. GENERAL INFORMATION.................................................................................................................3 1.1 Product Description...........................................................................................................................3 1.2 Description for Equipment Authorization........................................................................................3 1.3 Test Facility........................................................................................................................................3 2. TESTED SYSTEM................................................................................................................................4 2.1 Test Mode...........................................................................................................................................4 2.2 Block Diagram of EUT System...........................................................................................................4 2.3 List of EUT System............................................................................................................................5 2.4 List of Antenna..................................................................................................................................5 3. RF POWER OUTPUT...........................................................................................................................6 3.1 Reference Rule and Specification......................................................................................................6 3.2 Test Configuration.............................................................................................................................6 3.3 Test Procedure....................................................................................................................................7 3.4 Test Results........................................................................................................................................8 4. MODULATION CHARACTERISTICS.................................................................................................9 4.1 Reference Rule and Specification......................................................................................................9 4.2 Test Results........................................................................................................................................9 5. NECESSARY BANDWIDTH..............................................................................................................10 5.1 Reference Rule and Specification....................................................................................................10 5.2 Test Configuration...........................................................................................................................10 5.3 Test Results.......................................................................................................................................11 6. EMISSION BANDWIDTH.................................................................................................................13 6.1 Reference Rule and Specification....................................................................................................13 6.2 Test Configuration...........................................................................................................................13 6.3 Test Results......................................................................................................................................14 7. FIELD STRENGTH OF SPURIOUS RADIATION...........................................................................18 7.1 Reference Rule and Specification....................................................................................................18 7.2 Test Procedure......…

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A-044-99-C Page 1 of 25 KEC Ikoma Testing Laboratory 12128 Takayama-cho Ikoma-city Nara 630-0101 Japan Designated by Ministry of international Trade and industry KANSAI ELECTRONIC INDUSTRY DEVELOPMENT CENTER HEAD OFFICE IKOMA TESTING LABORATORY 6-8-7 NISHITENMA 12128 TAKAYAMA-CHO KITA-KU OSAKA 530-0047 JAPAN IKOMA-CITY NARA 630-0101 JAPAN Corporate Juridical Person TEST REPORT Report No.A-044-99-CDate: 21 February 2000 This test report is to certify that the tested device properly complies with the requirements of: FCC Rules and Regulations Part 95 : Radio Control (R/C) Radio Service. The tests necessary to show compliance to the requirements were performed and these results met the specifications of requirement. The results of this report should not be construed to imply compliance of equipment other than that, which was tested. Unless the laboratory permission, this report should not be copied in part. 1. Applicant Company Name:JAPAN REMOTE CONTROL CO., LTD. Mailing Address:2-2-12, EIWA, HIGASHIOSAKA-CITY, OSAKA, 577-0809 JAPAN 2. Identification of Tested Device Type of Device:Radio Control (R/C) Radio Service. Kind of Equipment Authorization:: DoC : Certification: Verification FCC ID:BRWEXPERT4 Device Name:FM 4 CHANNEL TRANSMITTER Trade Name: JR PROPO Model Number: EXPERT 4 Serial Number:No.1: Prototype : Pre-production : Production Date of Manufacture:December, 1999 3. Test Items and Procedure : Measurement of RF Power Output (Substitution Method) : Modulation Characteristics : Necessary Bandwidth : Emission Bandwidth : Measurement of Field Strength of Spurious Radiation : Frequency Stability Measurement Above all tests were performed under: FCC Part 2 Sec2.1046, Sec2..1047, Sec2.1049, Sec2.1053, Sec2.1055 and Sec2.1057. : without deviation, : with deviation(details are found inside of this report) 4. Date of Test Receipt of Test Sample: 13 December 1999 Test Completed on: 15 February 2000 Eizo Hariya General Manager of Ikoma Testing Laboratory A-044-99-C Page 2 of 25 KEC Ikoma Testing Laboratory 12128 Takayama-cho Ikoma-city Nara 630-0101 Japan Table of Contents 1. GENERAL INFORMATION.................................................................................................................3 1.1 Product Description.........................................................................................................................3 1.2 Description for Equipment Authorization.......................................................................................3 1.3 Test Facility......................................................................................................................................3 2. TESTED SYSTEM................................................................................................................................4 2.1 Test Mode..........................................................................................................................................4 2.2 Block Diagram of EUT System.........................................................................................................4 2.3 List of EUT System..........................................................................................................................5 2.4 List of Antenna.................................................................................................................................5 3. RF POWER OUTPUT...........................................................................................................................6 3.1 Reference Rule and Specification....................................................................................................6 3.2 Test Configuration............................................................................................................................6 3.3 Test Procedure..................................................................................................................................7 3.4 Test Results......................................................................................................................................8 4. MODULATION CHARACTERISTICS.................................................................................................9 4.1 Reference Rule and Specification....................................................................................................9 4.2 Test Results......................................................................................................................................9 5. NECESSARY BANDWIDTH..............................................................................................................10 5.1 Reference Rule and Specification..................................................................................................10 5.2 Test Configuration..........................................................................................................................10 5.3 Test Results.....................................................................................................................................11 6. EMISSION BANDWIDTH.................................................................................................................13 6.1 Reference Rule and Specification..................................................................................................13 6.2 Test Configuration..........................................................................................................................13 6.3 Test Results....................................................................................................................................14 7. FIELD STRENGTH OF SPURIOUS RADIATION...........................................................................18 7.1 Reference Rule and Specification..................................................................................................18 7.2 Test Procedure...............................…

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Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO T A B L E O F C O N T E N T S 1.0 INTRODUCTION 1.1 Definition 1.2 Application 1.3 Construction 2.0 ENCODER THEORY OF OPERATION 3.0 RF TRANSMITTER SECTION THEORY OF OPERATION 3.1 General 3.2 Block Diagram 4.0 FAILURE ANALYSIS 5.0 APPENDICES 5.1 Transmitter Block Diagram 5.2 Transmitter Schematic Diagram 5.3 Transmitter Photographs and ID Labels 5.4 Transmitter Tune Up Procedure 5.5 Quarts Crystal Specifications 5.6 Test Data Page 1 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 1.0 INTRODUCTION 1.1 Definition The Model QUATTRO is a transmitter for the Remote Control (R/C) of models such as airplane, helicopters, cars, boats, etc. This Transmitter is for FM System, available for the PPM(Pulse Position Modulation). This Transmitter is a part of the Horizon Hobbies PPM "family" of Remote Control Transmitters which at this time consists of: Transmitter Model # FCC ID # F400 NET-E104 BRWNET-E104 F400EX BRWF400EX XF421EX BRWXF421EX Separate Applications for each transmitter and for the receiver is submitted as required by the Commission. The Manufacturer, Japan Remote Control Company (JR), Manufactures all transmitters and receivers. The PPM family of R/C systems is exported by JR to the united States of America, and several European and Asian Countries. The Applicant for this Equipment Authorization, HORIZON HOBBIES, INC. will, following receipt of Grant of Equipment Authorization, import only those versions of these R/C radios which are allowed for use in the USA under the Rules and Regulations of the Federal Communications The 72 - 73 MHz version of this transmitter is the subject of this Application; these are the units which will be offered for sale to the general public. Page 2 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 1.2 Application The Model QUATTRO R/C transmitter utilizes "Frequency Modulation" to convey the PPM encoded position of its control sticks (joysticks) and toggle switches to its companion R/C receiver, where the PPM encoded pulse train is demodulated, decoded, and supplied to a number of servo-mechanisms for positioning of control surfaces, throttle etc. on the model. The Frequency-Shift-Keying of the transmitter carrier takes place in the rhythm of the PPM pulse train. Transmitter and receiver are very narrow band units; they have been designed to comply with the European requirements of 10 KHz channel spacing. As a result, they operate safety in the present 20 KHz channel spacing environment allowed at this time in the USA. 1.3 Construction The Model QUATTRO Transmitter all consists of a plastic case. (Reference is made to Fig. 5.1, Transmitter Block Diagram) * control sticks and control switches * a 9.6V rechargeable (Nicad) battery * a commutator to sample the analog control voltages in sequence * an analog-to-digital converter (ADC) * a microprocessor ( u p) to create the PPM pulse train * a modulator driver stage * a RF power stage * a telescopic antenna This Transmitter is to be made available by the JAPAN and USA on those carrier frequencies in the 72 - 73 MHz frequency band which are at present authorized for R/C use. Page 3 Technical Report Transmitter Model QUATTRO FCC ID# BRWQUATTRO 2.0 ENCODER THEORY OF OPERATION Reference is made to Figure 5.1, Transmitter Block Diagram. The functions of the encoder are to: * accept the analog voltages from the control inputs (joysticks, toggle switch). * process the analog voltages to create control mixing, adding, reversing, etc., as desired by the user. * sample these voltages in a cyclic rhythm under control of the system's internal timing generator. (This process is called commutation.) * process these analog voltages into binary weighted digital control words by means of an Analog-to-Digital Converter (ADC). * store these digital representations of the analog control input into a temporary memory (RAM). * supply this serial data stream to a buffer-driver for modulation of the RF Transmitter. * provide "housekeeping" of the encoding process by means of a quarts crystal controlled internal clock. * provide supply voltages to the RF section (Vcc = 9.6V battery voltag…

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