OQH-CHUNGS-05-006Transmitter

MULTI-CHANNEL CABLE FREE REMOTE THERMO-HYGRO SENSOR MODEL: C-846 USER’S MANUAL INTRODUCTION Congratulation on your purchasing of the C-846 Remote Sensor. The Remote Sensor is used with the Chung’s 433MHz multi-channel In-Out wireless weather station to monitor the temperature and humidity changes of remote or outdoor sites. Operation is easy and no wire installation is required. MAIN FEATURES 1. LED INDICATOR Flashing when the sensor transmitting a reading. 2. LCD Indicates the selected channel, displays the current temperature and humidity alternately. 3. CHANNEL SLIDE SWITCH Designate the channel of the sensor to Channel 1, Channel 2 or Channel 3. 4. RESET BUTTON Reset all settings to default values 5. WATER RESISTANT RING Prevent the unit from water penetrating. 6. BATTERY COMPARTMENT Contains 2 AAA size batteries. 7. BATTERY DOOR Covers the battery compartment 8. WALL-MOUNT HOLDER Support the sensor on wall 9. FOLDING TABLE STAND For standing the unit on a flat surface BEFORE YOU BEGIN For best operation, please read the follows: 1. Assign different channels to different sensors. 2. Insert 2 AAA batteries for the sensors before doing so for the weather station. 3. Place the weather station as close as possible next to the sensor; reset the weather station after installing batteries. 4. Place the receiver and transmitter away from metal objects and electrical appliances to minimize the interference. Position the sensor and the main unit within effective transmission range: about 30 meters in usual circumstance. Note: 1. The building material and the position of the receiver and transmitter affect the effective range. So try various set-ups will help to obtain the best result. 2. Though the transmitter is waterproof and meant to be used outdoors, it should be placed away from direct sunlight, rain or snow. °F BATTERY AND CHANNEL INSTALLATION The transmitter uses two AAA size batteries. To install them, do the follows: 1. Unscrew the screws on the battery door. 2. Select the channel number by sliding the CHANNEL slide switch. 3. Select the temperature display unit on the °C / °F slide switch. 4. Insert the batteries as per the indication marked in the battery compartment. 5. Replace the battery door and secure its screws. CHANGE CHANNEL Once a channel is assigned to a transmitter, you can change it by removing the batteries and repeating the above procedure, the other way is to select the designated channel and then reset the transmitter. LOW BATTERY WARNING When the low battery indicator displays in the sensor, it will show up in the main unit under the represented channel, replace with 2 new AAA batteries at once. OPERATION Once batteries are inserted, the transmitter will start transmitting samplings at 60-64 seconds intervals. The current temperature and humidity will be shown on the transmitter’s LCD. The temperature unit °C / °F shows in the receiver is determined by the setting on the receiver. THE RESET BUTTON Refer to the main unit’s manual for further information. This button is used to reset all settings to default values, when changing the channel or malfunctioning. Use a blunt wire to hold down the button to reset it. HOW TO USE THE TABLE STAND OR WALL MOUNTING The transmitter comes with a wall-mount holder and folding stand. Use either to set up the unit. CAUTIONS This unit is engineered to give you years of satisfactory service if you handle it carefully. Follows are a few cautions: 1. Do not immerse the unit in water. 2. Do not leave disabled battery in the watch for a long time and be sure to replace it with new ones. If battery fluid leaks out, it may damage movement components. 3. Avoid rough using or dropping the unit. 4. To clean the unit, use a dry soft cloth or a soft cloth moistened in a solution of water and a mild neutral detergent. Never use solvents (such as benzene, spray cleanser). 5. Always read the user’s manual thoroughly before operating the unit. FCC Remarks: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment 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 off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. z Increase the separation between the equipment and receiver. z Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. z Consult the dealer or an experienced radio/TV technician for help. SPECIFICATIONS Our temperature measuring range: -20 °C to +60 °C Recommended operating range: -20 °C to +50 °C Temperature resolution: 0.1 °C / 1°F (above 0 °C) 1 °C / °F (below 0 °C) Remote relative humidity measuring range: 20% RH to 90% RH Recommended operating range: 20% RH to 90% RH Resolution: 1%RH RF Transmission Frequency: 433MHz No of remote unit: up to 3 units RF Transmission Range: Maximum 30 meters Temperature sensing cycle: around 60 ~ 64 seconds Power: 3 V, use 2 x AAA 1.5V alkaline battery We…

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CHUNG’S ELECTRONIC CO.,LTD. Figure 1 C8102 Block diagram CHUNG’S EECTRONIC CO.,LTD Description name Block diagram Model C846 File No TX846-BD Date 12/4/05 MSM64162A MCU 433 MHz modulator Temperature Humidity sensor Channel select 433.92MHz SAW Resonator PCB loop antenna TX LED 3V battery

Test Setup FCC ID : OQH-CHUNGS-05-006 External Photo - Front External Photo - Rear

Test Setup FCC ID : OQH-CHUNGS-05-006 Internal Photo - 1 Internal Photo - 2 Test Setup FCC ID : OQH-CHUNGS-05-006 Internal Photo - 3

C-846 TECHNICAL DESCRIPTION A. CIRCIUT OPERATION 1. Temperature sensor Provide temperature data for MCU 2. Humidity sensor Provide humidity data for MCU. 3. MCU The micro controller unit (MCU) are encoding and manipulating temperature data. 4. SAW Resonator Stable RF transmitter Oscillator frequency. 5. RF transmitter Convert MCU encoded data to RF OOK modulated signals. B. COMPONENT DESCRIPTION CATEGORY NUMBER NAME DESCRIPTION Resonator 433.92MHz SAW Resonator Stable RF transmitter Oscillator frequency. Transistor H2D (Q1) RF Transistor 433MHz modulator Transistor H2D (Q2) RF Transistor 433.92MHz amplifier Transistor 2SC1623 L6 Low battery detect MCU MSM64162A Micro controller unit Encoding and manipulating temperature data Crystal 32KHz 3*8 Quartz Stable MCU master clock Sensor HS-12P Humidity sensor Provide Humidity data for MCU Sensor 103AT Temperature sensor Provide temperature data for MCU CHUNG’S ELECTRONIC CO.,LTD Name TECHNICAL DESCRIPTION Model C846 File No RF846-T Date 18/3/05

• The test results reported in this test report shall refer only to the sample actually tested and shall not refer or be deemed to refer to bulk from which such a sample may be said to have been obtained. • This report shall not be reproduced except in full without prior authorization from Intertek Testing Services Hong Kong Limited. • For Terms And Conditions of the services, it can be provided upon request. • The evaluation data of the report will be kept for 3 years from the date of issuance. Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Tel: (852) 2173 8888 Fax: (852) 2371 0521 Website: www.hk.intertek-etlsemko.com Chung's Electronic Co., Ltd. Application For Certification (FCC ID: OQH-CHUNGS-05-006) Transmitter 0506383 DL/ Sandy Lee May 9, 2005 INTERTEK TESTING SERVICES FCC ID: OQH-CHUNGS-05-006 i LIST OF EXHIBITS INTRODUCTION EXHIBIT 1: General Description EXHIBIT 2: System Test Configuration EXHIBIT 3: Emission Results EXHIBIT 4: Equipment Photographs EXHIBIT 5: Product Labelling EXHIBIT 6: Technical Specifications EXHIBIT 7: Instruction Manual EXHIBIT 8: Miscellaneous Information INTERTEK TESTING SERVICES FCC ID: OQH-CHUNGS-05-006 ii MEASUREMENT/TECHNICAL REPORT Chung's Electronic Co., Ltd. - MODEL: CHUNG'S C-846 FCC ID: OQH-CHUNGS-05-006 May 9, 2005 This report concerns (check one:) Original Grant X Class II Change Equipment Type: Low Power Transmitter (example: computer, printer, modem, etc.) Deferred grant requested per 47 CFR 0.457(d)(1)(ii)? Yes No X If yes, defer until: date Company Name agrees to notify the Commission by: date of the intended date of announcement of the product so that the grant can be issued on that date. Transition Rules Request per 15.37? Yes No X If no, assumed Part 15, Subpart C for intentional radiator - the new 47 CFR [12-08-03 Edition] provision. Report prepared by: Derek Leung Intertek Testing Services 2/F., Garment Center, 576, Castle Peak Road, Kowloon, Hong Kong. Phone: 852-2173-8539 Fax: 852-2371-0521 INTERTEK TESTING SERVICES FCC ID: OQH-CHUNGS-05-006 iii Table of Contents 1.0 General Description..............................................................................................2 1.1 Product Description ..............................................................................................2 1.2 Related Submittal(s) Grants .................................................................................2 1.3 Test Methodology.................................................................................................3 1.4 Test Facility ..........................................................................................................3 2.0 System Test Configuration ...................................................................................5 2.1 Justification ..........................................................................................................5 2.2 EUT Exercising Software .....................................................................................5 2.3 Special Accessories .............................................................................................5 2.4 Equipment Modification ........................................................................................6 2.5 Measurement Uncertainty ....................................................................................6 2.6 Support Equipment List and Description ..............................................................6 3.0 Emission Results ..................................................................................................8 3.1 Field Strength Calculation ....................................................................................9 3.2 Radiated Emission Configuration Photograph ....................................................11 3.3 Radiated Emission Data.....................................................................................12 4.0 Equipment Photographs .....................................................................................15 5.0 Product Labelling ................................................................................................17 6.0 Technical Specifications ....................................................................................19 7.0 Instruction Manual ..............................................................................................21 8.0 Miscellaneous Information .................................................................................23 8.1 Measured Bandwidth .........................................................................................24 8.2 Discussion of Pulse Desensitization ...................................................................25 8.3 Calculation of Average Factor ............................................................................26 8.4 Emissions Test Procedures................................................................................27 INTERTEK TESTING SERVICES FCC ID: OQH-CHUNGS-05-006 iv List of attached file Exhibit type File Description filename Test Report Test Report report.pdf Operation Description Technical Description descri.pdf Test Setup Photo Radiated Emission radiated photos.doc Test Report Bandwidth Plot bw.pdf External Photo External Photo external photos.doc Internal Photo Internal Photo internal photos.doc Block Diagram Block Diagram block.pdf Schematics Circuit Diagram circuit.pdf ID Label/Location Label Artwork and Location label.pdf User Manual User Manual manual.pdf Test Report Timing Diagram timing.pdf INTERTEK TESTING SERVICES FCC ID: OQH-CHUNGS-05-006 1 EXHIBIT 1 GENERAL DESCRIPTION INTERTEK TESTING SERVICES FCC ID: OQH-CHUNGS-05-006 2 1.0 General Description 1.1 Product Description The Equipment Under Test (EUT) is a Transmitter operating at 433MHz. The EUT is powered by 3V d.c. (2 x 1.5V “AAA” battery). It transmits temperature signal to receiver. The receiver will display the …

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Test Setup FCC ID : OQH-CHUNGS-05-006 Radiated Photo - Front Radiated Photo - Rear