OK8TT3872HT022.4GHz 50-Chnnl Anlg Crdls Phn w/ Answrng Mchn Sys

MODEL: BE-3872 2.4GHZ CORDLESS DIGITAL ANSWERING SYSTEM IMPORTANT:To receive Caller ID information on incoming telephone calls, you must subscribe to the Caller ID service provided by your local telephone company; there is a fee for this service and it may not be available in all areas. 600-1600702-A INSTALLATION AND OPERATING GUIDE This symbol is to alert you to important operating or servicing instructions that may appear in the user's manual. Always follow basic safety precautions when using this product to reduce the risk of injury, fire, or electrical shock. When using this product, basic safety precautions should always be followed to reduce the risk of fire, electric shock and injury to persons, including the following: 1.Read and understand all instructions. 2.Follow all warnings and instructions marked on the product. 3.Use only with class 2 power source DC 9V 500mA. 4.Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning. 5.Do not use this product near water; for example, near a bathtub, wash bowl, kitchen sink or laundry tub, in a wet basement or near a swimming pool. 6.Do not place this product on an unstable cart, stand, or table. The product may fall, causing serious damage to the product. 7.Slots and openings in the cabinet back or bottom are provided for ventilation. To protect it from overheating, these openings must not be blocked or covered. The openings should never be blocked by placing the product on the bed, sofa, rug, or other similar surface. This product should never be placed near or over a radiator or heat register. This product should not be placed in an enclosed environment unless proper ventilation is provided. 8.Do not allow anything to rest on the power cord. Do not locate this product where the cord will be abused by animals or persons walking on it. 9.Do not overload wall outlets and extension cords as this can result in risk of fire or electrical shock. 10. Never push objects of any kind into this product through cabinet slots as they may touch dangerous voltage points or short out parts that could result in a risk of fire or electrical shock. Never spill liquid of any kind on the product. 11. To reduce the risk of electrical shock, do not disassemble this product. Instead take it to a qualified service person when service or repair work is required. Opening or removing covers may expose you to dangerous voltages or other risks. Incorrect re-assembly can cause electrical shock when the appliance is subsequently used. 12. Unplug all cords and refer servicing to qualified service personnel under the following conditions: A. When the power supply cord or plug is damaged or frayed. B. If liquid has been spilled into the product. C. If the product has been exposed to rain or water. D. If the product does not operate normally by following the operating instructions. Adjust only those controls covered in the operating instructions. Improper adjustment of other controls may result in damage and require work by a qualified technician to restore the product to normal operation. 13. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning. 14. Do not use a telephone to report a gas leak in the vicinity of the leak. IF YOUR PRODUCT UTILIZES BATTERIES, THE FOLLOWING ADDITIONAL PRECAUTIONS SHOULD BE OBSERVED: 1.There is danger of the battery exploding if it is incorrectly installed. When inserting the batteries into this product, the proper polarity or direction must be observed. Reverse battery insertion can cause charging that may result in leakage or explosion. 2.Use only the type and size of batteries specified in the users manual. 3.Do not dispose of batteries in a fire. The cells may explode. Check with local codes for possible special disposal instructions. 4.Do not open or mutilate the batteries. Released electrolyte is corrosive and may cause damage to the eyes or skin. It may be toxic if swallowed. 5.Exercise care in handling batteries in order not to short the battery with conducting materials such as rings, bracelets and keys. The battery or conductor may overheat and cause burns. 6.Do not attempt to recharge the batteries with or identified for use with this product. The batteries may leak corrosive electrolyte or explode. 7.Do not attempt to rejuvenate the batteries provided with or identified for use with this product by heating them. Sudden release of the battery electrolyte may occur causing burns or irritation to eyes or skin. 8.When replacing batteries, all batteries should be replaced at the same time. Mixing fresh and discharged batteries could increase internal cell pressure and rupture the discharged batteries. 9.Remove the batteries from this product if the product will not be used for a long period of time (several months or more) since during this time the batteries could leak, damaging the product. 10. Discard "dead" batteries as soon as possible since they are more likely to leak in a product. 11. Do not store this product, or the batteries provided with or for identified use with this product, in high temperature areas. 12. If your product uses a rechargeable battery, charge the battery(ies) only in accordance with the instructions and limitation specified in the User Manual. SAVE THESE INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS 2 Important Safety Instructions .........2 FCC Regulations...........................3-4 Battery Cautionary Instructions .....5 BE-3872 Parts Checklist ..................6 Location of Controls and Features.......................................7-11 Handset .......................................7-8 Base ..........................................9-10 Choosing a Location ......................11 Telephone Setup.......................12-14 Connecting the Base ....................12 Wall Mounting ...............................13 Tone/Pulse Switch ......…

Text truncated - open the document above for the full version.

PMP3880BBD.sch-1 - Sat Jun 15 10:14:52 2002 PMP3815HBDsch.sch-1 - Mon Jul 08 17:52:52 2002

EXHIBIT C - EUT EXTERNAL PHOTOGRAPHS Handset Chassis - Top View Handset Chassis - Bottom View Base Chassis - Front View Base Chassis - Rear View Base Chassis - Port View Handset Main Board - Component View Power Adapter - Overall View

EXHIBIT A - FCC PRODUCT LABELING AND WARNING STATEMENT FCC ID Label Specifications: Text is black or white in color and is left justified. Labels are silk-screened and shall be “permanently affixed” at a conspicuous location on the EUT. Proposed Label Location on EUT Bottom Side of Base/Proposed FCC ID Label Location / Handset FCC Warning Statement A FCC Warning Statement is provided in the product manual. FCC ID: EW780-1005-00 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. Privacy of communications may not be ensured when using this phone. 2.1875" 1.0" FCC ID: OK8TT3872HT02

EXHIBIT C - EUT INTERNAL PHOTOGRAPHS Handset Main Board - Component View Handset Main Board - Solder View Handset Transceiver - Component View Handset Transceiver - Solder View Base Main Board - Component View Base Main Board - Solder View Base Transmitter - Component View Base Transmitter - Solder View Base LED - Solder Base LED - Component

LIONDA TECHNOLOGY COMPANY LIMITED ENGINEERING DEPARTMENT PMP3872desc Page 1 8/23/2002 CIRCUIT DESCRIPTION Model: PMP-3872XX Base a. RF Transmitter Section – RF Board Compressed audio signal is frequency modulated through the varactor diode D3, D4. Diode D3, D4, L4 and Q5 the external components formed the voltage controlled oscillator circuit for the transmitter part. This circuit generates the TX VCO frequency. A portion of this signal is fed back to the PLL IC’s pin1 (FIN1) for phase comparison. Once the phase of oscillation stabilized, the PLL circuit generates the error voltage necessary for the VCO to oscillate at the desired transmitter’s RF frequency. The VCO circuit impedance is matched with the succeeding circuit through the transistor Q2 that also acts as the buffer amplifier. RF amplifier Q7 boosts the signal for transmission. This amplified RF signal is trimmed to the desired frequency band by BPF2403 so as not to interfere with the receiver circuit. The transmitter RF signal is then propagated through the antenna. b. RF Receiver Section - RF Board The Base Unit antenna receives RF signal. Band Pass Filter BPF2475 trims the signal to the desirable frequency band. Transistor Q6 & Q3 is a low noise amplifier that boosts the RF signal to a specific level for mixing. PLL IC1 (KB8825B) is used as a Universal Phase Lock Loop circuit. The frequency from the Voltage Controlled Oscillator (VCO) D1, L5 and Q4, is fed back to the PLL IC through pin 16 (FIN2) for phase comparison. During channel scanning or turning the unit on, once the phase of oscillation stabilized (locked), the PLL circuit generates the first local oscillator frequency for down-converting the received RF signal into the first IF frequency 10.7MHz. This process is accomplished through the IF mixer circuit Q1. Q1 is used for matching the impedance of the mixer circuit with the succeeding circuits. The resulting IF signal is kept constant by the IF Filter FL1 to 10.7MHz which is then mixed with the second local oscillator frequency 11.150MHz (derived from X1 & C47) to produced a much lower IF frequency. This lower IF frequency if further filtered by IF Filter FL4 to produce a more stable signal of 450AKHz. Quadrature signal detection is accomplished internally by the Narrow-band Detector IC2 (KA3361) with the IF coil L7. The recovered audio frequency can be taken from IC2 audio output pin9. Double conversion of received signal is utilized to improve the image frequency rejection of the unit. c. Transmitter Audio Section – Main Board 1 LIONDA TECHNOLOGY COMPANY LIMITED ENGINEERING DEPARTMENT PMP3872desc Page 2 8/23/2002 Audio Frequency signal from the telephone line is compressed through the compressor part of IC4 to minimize the transmission noise. The degree of compression depends on the external RC combinations. AGC is also utilized by IC4 to avoid shock noise caused by abrupt change of audio levels. The compressed audio is filtered and amplified for better acoustical performance. d. Receiver Audio Section – Main Board The compressed Audio Frequency signal is passed through passive RC filters for acoustic compliance. The filtered audio is then fed to the Compander IC4 for expansion thus retrieving the original Audio signal with noise filtered out. Q5 is used as buffer circuit. Bridge rectifier D12-D15 isolates the high-voltage telephone line to the rest of the circuit. D12-D15 is also act as a hybrid transformer to create a two-way path for audio transmission to and reception from the telephone line. Handset a. RF Transmitter Section – RF Board Refer to portion 1.b for this section. All circuit performance is the same except that Band Pass Filter BPF2403 is changed to BPF2475 for the handset transmission. b. RF Receiver Section – RF Board Refer to portion 1.b for this section. All circuit performance is the same except that Band Pass Filter BPF2475 is changed to BPF2403 for the handset reception. c. Transmitter Audio Section – Main Board Audio Frequency signal from the handset or from the headset microphone is compressed through the compressor part of IC1 to minimize the transmission noise. The degree of compression depends on the external RC combinations. AGC is also utilized by IC1 to avoid shock noise caused by abrupt change of audio levels. The compressed audio is filtered and amplified for better acoustical performance. Q3 is a switching transistor that controls the power supply for the TX RF part. d. Receiver Audio Section – Main Board The compressed Audio Frequency signal is passed through passive RC filters for acoustic compliance. The filtered audio is then fed to the Compander IC1 for expansion thus retrieving the original audio signal with noise filtered out. Q2 & Q10 act as audio amplifier to sufficiently drive the handset speaker. Q7 and Q8 are 2 2 LIONDA TECHNOLOGY COMPANY LIMITED ENGINEERING DEPARTMENT PMP3872desc Page 3 8/23/2002 switching transistors that control the power supply for the RF part, the Compander part and the AF amplifier respectively. An earphone jack is provided for an optional headset unit for handsfree conversation on the handset. OTHERS (Handset): a. Charging and Reset Controls Recharging the handset battery is accomplished by putting the handset on the cradle. IC5 detects this action and sends a command to the CPU for proper exchange of security code. b. Ring Detection When the handset receives the ring command from the base unit, the CPU will send buzzer signal to the ringer amplifier Q5 and Q6 that drives the Buzzer. OTHERS (Base): a. Hook Switching and Dialing Hook switching and the transistor Q6 that is controlled by the CPU accomplishes pulse dialing. DTMF signal from the ladder circuit internal to the CPU is filtered and amplified by Q5. b. Over-voltage Protection Fuse1 and varistor Z1 act as high current and high voltage protectors for the telephone line interface. In case of presence of voltage surge across the telephone line, Fuse1 decreases its resistance and dumps the li…

Text truncated - open the document above for the full version.

PMP3880brf.sch-1 - Sat Jun 15 10:09:45 2002 3880B.sch-1 - Sat Jun 15 10:07:19 2002

Note: This test report is specially limited to the above client company and the product model only. It may not be duplicated without prior written consent of Bay Area Compliance Laboratory Corporation. This report must not be used by the client to claim product endorsement by NVLAP or any agency of the U.S. Government. FCC PART 15 SUBPART C EMI MEASUREMENT AND TEST REPORT For Shenzhen Baoan Hantong Electronics Factory Block 11 & 12, Jinbi Industrial Area Hwangtian, Baoan, Shenzhen, China FCC ID: OK8TT3872HT02 August 23, 2002 This Report Concerns: Original Report Equipment Type: 2.4GHz 50-Channel Analog Cordless Telephone Test Engineer: Jeff Lee Report No.: R0208081 Test Date: June 25, 2002 Reviewed By: Benjamin Jing Prepared By: Bay Area Compliance Laboratory Corporation 230 Commercial Street Sunnyvale, CA 94085 Tel: (408) 732-9162 Fax: (408) 732-9164 Shenzhen Baoan Hantong Electronics Factory FCC ID: OK8TT3872HT02 Report # R0208081Rpt Page 2 o of 13 FCC Part 15 Subpart C TABLE OF CONTENTS 1 - GENERAL INFORMATION..................................................................................................................................3 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..............................................................................3 1.2 OBJECTIVE.............................................................................................................................................................3 1.3 RELATED SUBMITTAL(S)/GRANT(S) ......................................................................................................................3 1.4 TEST METHODOLOGY............................................................................................................................................3 1.5 TEST FACILITY.......................................................................................................................................................3 1.6 TEST EQUIPMENT LIST...........................................................................................................................................4 1.8 LOCAL SUPPORT EQUIPMENT LIST AND DETAILS...................................................................................................4 1.9 EXTERNAL I/O CABLING LIST AND DETAILS.........................................................................................................4 2 - SYSTEM TEST CONFIGURATION.....................................................................................................................5 2.1 DESCRIPTION OF TEST CONFIGURATION................................................................................................................5 2.2 EQUIPMENT MODIFICATIONS.................................................................................................................................5 2.3 CONFIGURATION OF TEST SYSTEM.........................................................................................................................5 2.4 TEST SETUP BLOCK DIAGRAM...............................................................................................................................5 3 - CONDUCTED EMISSIONS ...................................................................................................................................6 3.1 MEASUREMENT UNCERTAINTY..............................................................................................................................6 3.2 EUT SETUP............................................................................................................................................................6 3.3 SPECTRUM ANALYZER SETUP................................................................................................................................6 3.4 TEST PROCEDURE..................................................................................................................................................6 3.5 SUMMARY OF TEST RESULTS.................................................................................................................................7 3.6 CONDUCTED EMISSIONS TEST DATA.....................................................................................................................7 3.7 PLOT OF CONDUCTED EMISSIONS TEST DATA.......................................................................................................7 4 - RADIATED EMISSIONS .......................................................................................................................................8 4.1 MEASUREMENT UNCERTAINTY..............................................................................................................................8 4.2 EUT SETUP............................................................................................................................................................8 4.3 SPECTRUM ANALYZER SETUP................................................................................................................................8 4.4 TEST PROCEDURE..................................................................................................................................................8 4.5 CORRECTED AMPLITUDE & MARGIN CALCULATION.............................................................................................9 4.6 SUMMARY OF TEST RESULTS.................................................................................................................................9 4.7 RADIATED EMISSIONS TEST RESULT DATA.........................................................................................................10 5 - BAND EDGES ........................................................................................................................................................12 5.1 TEST PROCEDURE......................................................................................................................…

Text truncated - open the document above for the full version.

EXHIBIT B - TEST SETUP PHOTOGRAPHS Base Conducted Emission Base Radiated Emission Handset Radiated Emission