VSOTD-2400MDZigbee Data Modem Module

1. TD-2400MD Function TD-2400MD is the compact size digital radio developed for supporting safety and convenience in leisure, restaurant, superstores and public area. No needed license because the operation is in ISM band. Furthermore, communication range and audio quality are more improved than analogue radios. TD-2400MD Radio’s main features are as follows;  Scalable Data Rate : 500Kbps and 1Mbps  Audio Sampling Rate : 8Kbps  PLL synthesizer type  Signal Strength Meter  Battery Status Indicator  USB PC Programming  Various Parameters and PC downloading methods Circuit Description TD-2400MD digital radio is consisted of RF module included MG2455, RF AMP to amplify output power, LED Display that shows condition of drive chip and Data modem which supports RS-232C after transforming from Digital signal into serial signal. 1. MG2455 ZigBee Chip and peripheral components MG2455(U11) is the RF module operated in 2.4Ghz ISM band. The module is made with RF transceiver, RF circuit, 8051 compatible MCU and several components. It follows IEEE802.15.4 and Zigbee standard regulation. MG2455 includes zigbee stack library as zPULSE. LM2455 data rate is from 250Kbps to 1Mbps available. Reset circuit is consisted of Q14, R38 and C52 and operates when the voltage is below 2.5V. Port P0.1, P0.2, P0.3is used as LED Display Port that shows TD-2400MD performance. Port P0[5] and P0[6] are connected to EEPROM(U14) for current status restore. P3[5], P3[6] and P3[7] are for GPIO control. LM2455(U11)’s feature is as follows; 1) Enhanced Feature • Scalable Data Rate : 250Kbps for ZigBee, 500Kbps and 1Mbps for private application. • Voice Codec Support : u-law/a-law/ADPCM • High RF RX Sensitivity of -98dBm @1.5V • High RF TX Power of +8dBm @1.5V • 96KB Embedded Flash Memory for Program Space. • 8KB Data Memory • Power Management Scheme with Deep Sleep Mode Support : under 1Ua 2) RF Transceiver • Single-chip 2.4GHz RF Transceiver • Low Power Consumption • Low Operating Voltage of 1.5V • High Sensitivity of -98dBm @1.5V • No External T/R Switch and LPF needed • On-chip VCO, LNA and PA • Programmable Output Power up to +8dBm @1.5V • Direct Sequence Spread Spectrum • O-QPSK Modulation • Scalable Data Rate : 250Kbps for ZigBee, 500Kbps and 1Mbps for private application. • RSSI Measurement • Compliant to IEEE802.15.4 3) Hardwired MAC • Two 256byte circular FIFIs • FIFO management • AES-128 Engine • CRC-16 Computation and check • 4) I8051-Compatible Microcontroller • Max 12x Performance of standard 8051 • 96KB Embedded Flash Memory • 8KB Data Memory • 128-byte CPU dedicated Memory • 1KB Boot ROM • Dual DPTR Support • Multi-Bank support for 96KB program memory(3 Banks) • 12S/PCM interface with two 128-byte FIFOs • u-law/a-law/ADPCM voice codec • Two high-speed UARTs with two 16byte FIFOs(up to 1Mbps) • 4 Timers/2PWMs • Watchdog Timer • Sleep Timer • Quadrature signal decoder • 22 General purpose I/O • Internal RC oscillator for sleep timer • On-chip power-on-reset • 4Channel 8-bit ADC • SPI Master/Slave interface • ISP (In system programming) • Temperature Sensor 5) Clock Inputs • 16MHz Cristal for system clock • 19.2MHz Cristal for system clock(optional) • 32.768KHz Cristal for sleep timer(0ptional) Figure 2. MG2455(U11) Block Diagram 2. RF Power AMP(U13) SKY65348(U13) is a high performance, Transmit/Receive(T/R) Front-End Module (FEM) ideally suited for use in 2.4 GHz Industrial, Scientific, and Medical (ISM) applications. A Double-Pole, Double-Throw (DPDT) switch allows antenna diversity and is used to select between receive and transmit data paths. The receive path contains a Low-Noise Amplifier (LNA) with a bypass switch. The LNA impedance matching networks are internal to the module and have been optimized for a low Noise Figure (NF) while maintaining good return losses into a 50 Ω source and load impedance. The transmit path contains a Power Amplifier (PA) optimized for saturated performance. The PA output is internally matched for optimum output power and efficiency into a 50 Ω load impedance, and passed through an harmonic filter before passing through the DPDT switch. The PA input provides a good return loss into a 50 Ω source impedance. The SKY65348 has a shutdown mode to minimize power consumption. All of the eight operating modes are controlled through three digital input pins. When the output power is 10mW, SKY65352 is applied as RF Power AMP(U13). When 0.5W, SKY85348 is applied as AMP. L11 and L12 take a role of matching Zigbee Chip, LM2455(U11) to RF power AMP(U13). When the power is 500mW, the feature of SKY65348 is as follows; • Transmit output power >±27 dBm • Receive path NF <3.1㏈ • Analog power control • Integrated control logic • LNA bypass mode • Shutdown mode • Small footprint, MCM (28-pin, 8 x 8 mm) package (MSL3, 260 C per JEDEC J-STD-020) • Single DC supply = 3.3V Applications • IEEE 802.15.4 radios • Advanced metering infrastructure • ISM systems Figure 2. SKY65348(U13) Block Diagram 3. RS-232C Transceiver Chip(U15) The SP3232E(U15) is an RS-232 transceiver solution intended for portable or handheld applications such as notebook or palmtop computers. The SP3232E(U15) series has a high-efficiency, charge-pump power supply that requires only 0.1μF capacitors in 3.3V operation. This charge pump allows the SP3232E to deliver true RS-232 performance from a single power supply ranging from +3.3V to +5.0V. The SP3232E is 2-driver/2-receiver devices. Figure 3. SP3232(U15) Block Diagram 4. Power Supply Circuit (U12, U16) Power is supplied to RF Power AMP(U13) by turning input DC+5V power into DC+4V through Regulator(U12) D-Sub connector(CON2). This is also used for input power of U16 which makes DC+3.0V power. Regulator(U13) turns DC+4V power into DC+3.0V to supply power to MG2455 ZigBee Chip(U11), RS-232C Transceiver Chip(U15), EEPROM(U14) and other circuits 5. EEPROM(U14) Saves various channel information and Parameter required in operating to TD-2400MD. Specification Frequency Range 24MHz Fr…

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141, KwangMyung Factory Apt 201, Haan-Dong, Kwangmyung-City, KyongGi-Do, Korea April 24, 2013 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 In re : Yeonhwa M Tech Co.,Ltd. FCC Application for FCC ID: VSOTD-2400MD To Whom It May Concern: We, the undersigned, hereby attest to the fact that we will apply the Declaration of Conformity procedure to the class B computer peripheral portion of this composite filing. Sincerely, Hwan-Dae Kim / Chief Engineer Yeonhwa M Tech Co., Ltd.

141, KwangMyung Factory Apt 201, Haan-Dong, Kwangmyung-City, KyongGi-Do, Korea April 24, 2013 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 LETTER OF AUTHORIZATION To whom it may concern: We, the undersigned, hereby authorize LTA Co., Ltd., to act on our behalf in all manners relating to application for equipment authorization for FCC ID: VSOTD-2400MD including signing of all documents relating to these matters. Any and all acts carried out by LTA Co., Ltd., on our behalf shall have the same affect as acts of our own. This authorization is valid until further written notice from Yeonhwa M Tech Co., Ltd. LTA Co.,LTD. (Contact Person) Contact name: Kyu-Hyun Lee Position: Manager Phone:(82)31-323-6008 E-mail:[email protected] Sincerely, Hwan-Dae Kim / Chief Engineer Yeonhwa M Tech Co., Ltd.

141, KwangMyung Factory Apt 201, Haan-Dong, Kwangmyung-City, KyongGi-Do, Korea April 24, 2013 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 In re : Yeonhwa M Tech Co., Ltd. FCC ID : VSOTD-2400MD Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules (CFR 47), and Section 552 (b) (4) of the Freedom of Information Act, Yeonhwa M Tech Co., Ltd.. hereby requests confidentiality and treatment of certain information accompanying this application. The materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. We are also hereby request Short-Term Confidentiality for 180 days after the grant as outlined in Public Notice DA 04-1705. This provision will give Yeonhwa M Tech Co., Ltd. temporary confidentiality of commercially sensitive information prior to product release. The requested Confidential and Temporary Confidential exhibits are listed as follows: Exhibit Type File Name CONFIDENTIAL Schematics CONF APPENDIX VSOTD-2400MD SCH DIA.pdf Parts list CONF APPENDIX VSOTD-2400MD PL.pdf Block diagram CONF APPENDIX VSOTD-2400MD BLK DIA.pdf Operational description CONF APPENDIX VSOTD-2400MD OpDes.pdf SHORT-TERM CONFIDENTIAL External Photos SHORT-TERM CONF VSOTD-2400MD EXT Photo.pdf Internal Photos SHORT-TERM CONF VSOTD-2400MD INT Photo.pdf Te s t-Setup Photos SHORT-TERM CONF VSOTD-2400MD Test Photo.pdf User’s Manual SHORT-TERM CONF VSOTD-2400MD Manual.pdf The Applicant understands that pursuant to Rule 0.457, disclosure of this application and all accompanying documentations, where applicable, will not be made public before the date of the Grant for this application. Sincerely, Hwan-Dae Kim / Chief Engineer Yeonhwa M Tech Co., Ltd.

Yeonhwa M Tech Co., Ltd. 141, KwangMyung Factory Apt 201, Haan-Dong, Kwangmyung-City, KyongGi-Do, Korea FCC ID: VSOTD-2400MD Request for Single Modular approval Transmitter Module Characteristics  The module will be used to the manufactured product by Yeonhwa M Tech Co.,Ltd. Sincerely, Hwan-Dae Kim / Chief Engineer Yeonhwa M Tech Co., Ltd. No Requirements EUT 1 Have its own RF shielding Device is equipped with metal shielding to cover RF section. Refer to external photos. 2 Have buffered modulation/data inputs (if such inputs are provided) All inputs to the modules are buffered thought logic or microprocessor inputs. 3 Have it own power supply regulation Power is supplied to RF Power AMP(U13) by turning input DC+5V power into DC+4V through Regulator (U12) D-Sub connector(CON2). This is also used for input power of U16 which makes DC+3.0V power. Regulator(U13) turns DC+4V power into DC+3.0V to supply power to MG2455 ZigBee Chip(U11), RS-232C Transceiver Chip(U15), EEPROM(U14) and other circuits. Refer to Module Block diagram 4 Meet the antenna requirements of Section 15.203 Refer to int ernal photos. 5 Be tested in a stand-alone configuration, i.e., the antenna, AC or DC power and data input/output lines must be connected to the module but, the module must not be inside another case during testing Device was tested on a supplied development platform for single modular approval. Refer to setup photos. 6 Be labeled with its own FCC ID number, and if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module Label is to be placed in Back side of the EUT. Refer to FCC ID label format. 7 The modular transmitter is manufactured so that the user cannot influence the operation of the transmitter that will operate outside of the scope of the regulations. Refer to “User’s Guide” 8 Address compliance with the Commission’s RF exposure limits in Sections 1.1310 and 2.1091. In addition, spread spectrum transmitters operating under Section 15.247 are required to address RF exposure compliance in accordance with Section 15.247(b)(4). This device is categorically excluded from routine environmental because it operate at very low power level

FCC ID: VSOTD-2400MD Copyright ○ c 2013, LTA Co., Ltd. Page 1 of 3 FCC ID: VSOTD-2400MD Copyright ○ c 2013, LTA Co., Ltd. Page 2 of 3 FCC ID: VSOTD-2400MD Copyright ○ c 2013, LTA Co., Ltd. Page 3 of 3

SAMPLE LABEL & LOCATION

FCC ID: VSOTD-2400MD Copyright ○ c 2013, LTA Co., Ltd. Page 1 of 2 FCC ID: VSOTD-2400MD Copyright ○ c 2013, LTA Co., Ltd. Page 2 of 2 FCC Part 15.203 Antenna requirement. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this section. The manufacturer may design the unit so that a broken antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited.  The antenna connector adheres to the antenna permanently with the glue

FCC ID: VSOTD-2400MD ATTACHMENT ** MPE Calculations ** The MPE calculation for this exposure is shown below. The peak radiated output power (EIRP) is calculated as follows: EIRP = P + G EIRP = 27.78 dBm + 4.23 dBi EIRP = 32.01 dBm Where, P = Power input to the antenna (mW) G = Power gain of the antenna (dBi) Power density at the specific separation: S = PG/(4R 2 π) Where, S = Maximum power density (mW/cm 2 ) P = Power input to the antenna (mW) G = Numeric power gain of the antenna R = Distance to the center of the radiation of the antenna (20cm = limit for MPE) S = (599.79 *2.65) / (4 * 20 2 * π) S = 0.3162 mW/cm 2 The Maximum permissible exposure (MPE) for the general population is 1 mW/cm 2 . The power density does not exceed the 1 mW/cm 2 limit. Therefore, the exposure condition is compliant with FCC rules. Estimated safe separation: R = √(PG / 4π) Where, P = Power input to the antenna (mW) G = Numeric power gain of the antenna R = Distance to the center of the radiation of the antenna (20cm = limit for MPE) R = √(599.79 *2.65/ 4π) R = 11.25 Cm The numeric gain(G) of the antenna with a gain specified in dB is determined by: G = Log -1 (dB antenna gain / 10) G = Log -1 ( 4.23 / 10) G = 2.65

Ref. No.: LR500111304I Copyright ○ c 2013, LTA Co., Ltd. Page 1 of 23 243 Jubug-Ri,Yangji-Myeon, Yongin-Si, Gyeonggi-Do, Korea 449-822 Tel: +82-31-323-6008 Fax: +82-31-323-6010 http://www.ltalab.com Dates of Tests: April 15~24, 2013 Test Report S/N: LR500111304I Test Site : LTA C O . , LT D . CERTIFICATION OF COMPLIANCE FCC ID. APPLICANT Equipment Class : Digital Transmission System (DTS) Manufacturing Description : Zigbee Data Modem Module Manufacturer : Yeonhwa M Tech Co., Ltd. Model name : TD-2400MD Variant Model name : XR-2400D Test Device Serial No.: : Identical prototype Rule Part(s) : FCC Part 15.247 Subpart C ; ANSI C-63.4-2003 Frequency Range : 2405MHz Max. Output Power : Max 27.78dBm – Conducted Data of issue : April 24, 2013 This test report is issued under the authority of: The test was supervised by: Kyu-Hyun Lee, Manager Jung-Moo Her, Test Engineer This test result only responds to the tested sample. It is not allowed to copy this report even partly without the allowance of the test laboratory. The report must not be used by the cl ient to claim product certification, approval, or endorsement by NVLAP, NIST, or any agency of the Federal Government. NVLAP LAB Code.: 200723-0 VSOTD-2400MD Yeonhwa M Tech Co., Ltd. Ref. No.: LR500111304I Copyright ○ c 2013, LTA Co., Ltd. Page 2 of 23 TABLE OF CONTENTS 1. GENERAL INFORMATION’S -------------------------------------------------------------------------- 2. INFORMATION’S ABOUT TEST ITEM ------------------------------------------------------------- 3. TEST REPORT --------------------------------------------------------------------------------------------- 3.1 SUMMARY OF TESTS ------------------------------------------------------------------------------ 3.2 TECHNICAL CHARACTERISTICS TEST -------------------- ----------------------------------- 3.2.1 6dB BANDWIDTH ------------------------------------------------------------------------------ 3.2.2 PEAK OUTPUT POWER ----------------------------------------------------------------------- 3.2.3 POWER SPECTRAL DENSITY --------------------------------------------------------------- 3.2.4 BAND – EDGE & SPURIOUS ----------------------------------------------------------------- 3.2.5 FIELD STRENGTH OF HARMONICS ------------------------------------------------------ 3.2.6 AC CONDUCTED EMISSIONS -------------------------------------------------------------- APPENDIX APPENDIX TEST EQUIPMENT USED FOR TESTS -------------------------------------------- 3 4 5 5 6 6 8 10 12 16 19 22 Ref. No.: LR500111304I Copyright ○ c 2013, LTA Co., Ltd. Page 3 of 23 1. General information’s 1- 1 Test Performed Company name : LTA Co., Ltd. Address : 243, Jubug-ri,Yangji-Myeon,Youngin-Si, Kyunggi-Do, Korea. 449-822 Web site : http://www.ltalab.com E-mail : [email protected] Telephone : +82-31-323-6008 Facsimile +82-31-323-6010 Quality control in the testing laboratory is implemented as per ISO/IEC 17025 which is the “General requirements for the competents of calibration and testing laboratory”. 1-2 Accredited agencies LTA Co., Ltd. is approved to perform EMC testing by the following agencies: Agency Country Accreditation No. Validity Reference NVLAP U.S.A 200723-0 2013-09-30 ECT accredited Lab. RRA KOREA KR0049 2013-04-24 EMC accredited Lab. FCC U.S.A 610755 2014-04-27 FCC filing FCC U.S.A 649054 UPDATING FCC CAB VCCI JAPAN R2133(10m), C2307 2014-06-21 VCCI registration VCCI JAPAN T-2009 2013-12-23 VCCI registration VCCI J APA N G-563 2015-05-28 VCCI registration IC CANADA 5799A-1 2015-06-21 IC filing Ref. No.: LR500111304I Copyright ○ c 2013, LTA Co., Ltd. Page 4 of 23 2. Information’s about test item 2- 1 Client & Manufacturer Company name : Yeonhwa M Tech Co., Ltd. Address : 141, KwangMyung Factory Apt 201, Haan-Dong, Kwangmyung-City, KyongGi-Do, Korea Tel / Fax : +82-2-3281-7270 / +82-2- 3281-7271 2- 2 Equipment Under Test (EUT) Trade name : Zigbee Data Modem Module FCC ID : VSOTD-2400MD Model name : TD-2400MD Variant Model name : XR-2400D Serial number : Identical prototype Date of receipt : April 15, 2013 EUT condition : Pre-production, not damaged Antenna type : Dipole antenna (M/N: HS-2405TO) Max Gain 4.23 dBi Frequency Range : 2405MHz (DSSS) RF output power : Max 27.78dBm - Conducted Number of channels : 1 Type of Modulation : O-QPSK Power Source : DC 5.0 V Firmware Version : V1.0.0 2- 3 Tested frequency LOW MID HIGH Frequency (MHz) 2405 - - 2-4 Ancillary Equipment Equipment Model No. Serial No. Manufacturer - - - - Ref. No.: LR500111304I Copyright ○ c 2013, LTA Co., Ltd. Page 5 of 23 3. Test Report 3.1 Summary of tests FCC Part Section(s) Parameter Limit Test Condition Status (note 1) 15.247(a) DTS Bandwidth > 500kHz Conducted C 15.247(b) Transmitter Peak Output Power < 1Watt C 15.247(d) Transmitter Peak Power Spectral Density < 8dBm @ 3kHz C 15.247(d) Band Edge & Spurious > 20 dBc C 15.209 Field Strength of Harmonics Emission Radiated C 15.207 AC Conducted Emissions Emissions Conducted C 15.203 Antenna requirement - - C Note 1: C=Complies NC=Not Complies NT=Not Tested NA=Not Applicable Note 2: The data in this test report are traceable to the national or international standards.  Antenna Requirement The Yeonhwa M Tech Co., Ltd. FCC ID:VSOTD-2400MD unit complies with the requirement of §15.203. The antenna is Dipole Antenna, the antenna connector adheres to the antenna permanently with the glue. The sample was tested according to the following specification: *FCC Parts 15.247; ANSI C-63.4-2003 *FCC KDB Publication No. 558074 D01 DTS Meas. Guidance v03r01 *FCC TCB Workshop 2012, April Ref. No.: LR500111304I Copyright ○ c 2013, LTA Co., Ltd. Page 6 of 23 3.2 Technical Characteristics Test 3.2.1 DTS Bandwidth Procedure: *The testing follows FCC KDB Publication No. 558074 D01 DTS Meas. Guidance v03r01 and TCB Workshop 2012, April. The automatic bandwidth measurement capability of an instrument may be employed using the X dB bandwidth mode with X set to 6 dB, if the functionality described above (i.e., RBW = 10…

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FCC ID: VSOTD-2400MD Copyright Ⓒ 2013, LTA Co., Ltd. Page 1 of 4 Radiated Emission (9kHz~30MHz) FCC ID: VSOTD-2400MD Copyright Ⓒ 2013, LTA Co., Ltd. Page 2 of 4 Radiated Emission (30MHz~1GHz) FCC ID: VSOTD-2400MD Copyright Ⓒ 2013, LTA Co., Ltd. Page 3 of 4 Radiated Emission (Above 1GHz) FCC ID: VSOTD-2400MD Copyright Ⓒ 2013, LTA Co., Ltd. Page 4 of 4 Conducted Emission