A27NBTC5390KEYBOARD

User’s Manual Model: TCJ55390 Product features USB Keyboard System requirements: Windows 98/Me/2000/Xp USB port Connecting the mouse Connect the USB plug to the corresponding USB port of your computer. The plug&play function of your system will automatically detect that a new device has been connected. FCC WARNING 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. 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. - Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help. NOTE 2: Any 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.

Block Diagram MC8303 USB Port LED Indicator Keyboard XTAL 6MHz

Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I FCC PART 15B EXHIBIT 2 - EUT EXTERNAL PHOTOGRAPHS EUT View 1 EUT View 2

Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I FCC PART 15B EXHIBIT 1- PRODUCT LABELING Proposed FCC ID Label Format FCC ID: A27NBTC5390 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. Specifications : Text is Black in color and justified. Labels are printed in indelible ink on permanent adhesive silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Proposed Label Location on EUT FCC ID Label Location

Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I FCC PART 15B EXHIBIT 1- PRODUCT LABELING Proposed FCC ID Label Format FCC ID: A27NBTC5390 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. Specifications : Text is Black in color and justified. Labels are printed in indelible ink on permanent adhesive silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Proposed Label Location on EUT FCC ID Label Location

Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I FCC PART 15B EXHIBIT 3 - EUT INTERNAL PHOTOGRAPHS EUT Housing and Board View Solder Board-Component View 1 Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I FCC PART 15B Solder Board-Component View 2

Circuit Desciption a. The IC-GL850G is the master control chip with a internal oscillation source of 6MHz as base clock signal, the keyboard connect to computer via USB port, and with three LED as indicator. b. The work voltage is DC 5V by USB port. Description for circuit: Key circuit: a. The function of MCU Ev656K61H is used for processing signal produced by optical key operation and transmitting the signal to RF circuit formed by Q1, Q2, Q3, Q4, L1 and other electronic components to modulate, amplify and send out. b. The RF signal of 27.045MHz is generated by a oscillator of 13.5225MHz circuit, and the modulated 27.045MHz wireless signal is transmitting via antenna. 3. Rx receiving circuit: a. RF circuit Ev2186 transmits the radio modulation signal which has received to MCU Ev656T72H to process and import pc computer.

55 44 33 22 11 D D C C B B A A Connect to Ka yboard Matrix Connect to Ke yboard Matrix TitleSize Document Number R ev Date: Sheet of <Doc>MC8303 A 11 Thursday, November 17, 2011 D4 D2 C210uF D3 J1USB VCCDMDPGND C1 104 U6 MC8303 P77 1 P76 2 VDD 3 OSCI 4 V3.3 5 GND 6 OSCO 7 DM 8 DP 9 P96 10 P60 R0 P85 C0 P90 C1 P91 C2 P50 C3 P51 C4 P52 C5 P53 C6 P54 C7 P84 C8 P83 C9 P82 C10 P93 14 P94 15 P87 C17 P81 C15 P55 C14 P56 C13 P70 43 P71 42 P72 41 P67 R7 P66 R6 P64 R4 P86 C16 P92 13 P95 12 P63 R3 P62 R2 P61 R1 P57 C12 P80 C11 P65 R5

Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I PAGE 1 OF 13 FCC PART 15B FCC PART 15B MEASUREMENT AND TEST REPORT FOR Ning Bo Tian Cheng Enterprise Limited 2 Lou, Huang Yang Mei Da Dao 145 Hao, Yiwu Shi, Zhejiang Province, China FCC ID: A27NBTC5390 Report Concerns: Original Report Equipment Type: Keyboard Model: TCJ55390 Report No.: STR11118072I Test Date: 2011-11-09 to 2011-11-15 Issue Date: 2011-11-18 Tested By: Vigoss Xiong / Engineer Reviewed By: Lahm Peng / EMC Manager Approved & Authorized By: Jandy so / PSQ Manager Prepared By: SEM.Test Compliance Service Co., Ltd 3/F, Jinbao Commerce Building, Xin'an Fanshen Road, Bao'an District, Shenzhen, P.R.C.（518101） Tel.: +86-755-33663308 Fax.: +86-755-33663309 Website: www.semtest.com.cn Note: This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by SEM.Test Compliance Service Co., Ltd . Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I PAGE 2 OF 13 FCC PART 15B TABLE OF CONTENTS 1. GENERAL INFORMATION ...................................................................................................................................3 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT)...............................................................................3 1.2 TEST STANDARDS...................................................................................................................................................3 1.3 TEST METHODOLOGY.............................................................................................................................................3 1.4 TEST FACILITY.......................................................................................................................................................4 1.5 EUT EXERCISE SOFTWARE....................................................................................................................................4 1.6 ACCESSORIES EQUIPMENT LIST AND DETAILS.......................................................................................................4 1.7 EUT CABLE LIST AND DETAILS.............................................................................................................................4 2. SUMMARY OF TEST RESULTS ...........................................................................................................................5 3. §15.107 (A)- CONDUCTED EMISSION .................................................................................................................6 3.1 MEASUREMENT UNCERTAINTY..............................................................................................................................6 3.2 TEST EQUIPMENT LIST AND DETAILS.....................................................................................................................6 3.3 TEST PROCEDURE...................................................................................................................................................6 3.4 BASIC TEST SETUP BLOCK DIAGRAM.....................................................................................................................6 3.5 ENVIRONMENTAL CONDITIONS..............................................................................................................................7 3.6 TEST RECEIVER SETUP...........................................................................................................................................7 3.7 SUMMARY OF TEST RESULTS/PLOTS......................................................................................................................7 3.8 CONDUCTED EMISSIONS TEST DATA......................................................................................................................7 4. §15.109 (A)- RADIATED EMISSION ...................................................................................................................10 4.1 MEASUREMENT UNCERTAINTY............................................................................................................................10 4.2 TEST EQUIPMENT LIST AND DETAILS...................................................................................................................10 4.3 TEST PROCEDURE.................................................................................................................................................10 4.4 CORRECTED AMPLITUDE & MARGIN CALCULATION............................................................................................11 4.5 ENVIRONMENTAL CONDITIONS............................................................................................................................11 4.6 SUMMARY OF TEST RESULTS/PLOTS....................................................................................................................11 Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I PAGE 3 OF 13 FCC PART 15B 1. GENERAL INFORMATION 1.1 Product Description for Equipment Under Test (EUT) Client Information Applicant: Ning Bo Tian Cheng Enterprise Limited Address of applicant: 2 Lou, Huang Yang Mei Da Dao 145 Hao, Yiwu Shi, Zhejiang Province, China Manufacturer: Ning Bo Tian Cheng Enterprise Limited Address of manufacturer: 2 Lou, Huang Yang Mei Da Dao 145 Hao, Yiwu Shi, Zhejiang Province, China General Description of E.U.T Items Description EUT Description: Keyboard Trade Name: / Model No.: TCJ55390 Rated Voltage: DC 5V (USB) Rated Current: / For more information refer to the circuit diagram form and the user’s manual. The test data is gathered from a production sample, provided by the manufacturer. 1.2 Test Standards The following report is prepared on behalf of the Ning Bo Tian Cheng Enterprise Limited in accordance with Part 2, Subpart J, and Part 15, Subparts A and B of the Federal Communication Commissions rules. The ob…

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Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I FCC PART 15B EXHIBIT 4 - TEST SETUP PHOTOGRAPHS Conduction Emission Front View Radiation Emission Test Setup (Below 30MHz) Ning Bo Tian Cheng Enterprise Limited Model: TCJ55390 REPORT NO.: STR11118072I FCC PART 15B Radiation Emission Test Setup (30MHz to 1GHz)