WFE75238-271:24 R/C VEHICLE-TWIN PACK

Oscillator 27.145MHz

1/24 RC Vehicle Twin Pack operation theory 27MHz 1. Function: radio control Forward, Backward, Left turn and Right turn. 2. Operation Theory: Transmitter When the receiver is turn on, and press the forward key. The TX2 pin 5 will set to low, at this monument TX2 pin 8 will send out move forward code to CR transistor and mix with 27 MHz modulation and amplifier, and then pass to LC high pass filter. Finally thought the antenna to transmit to Air. Receiver When the Antenna received the 27MHz modulation signal from the Air. The signal going to super head detection to demodulation, and then press to RX-2 pin 14 to amplifier. The amplified signal will output from RX-2 pin1 and pass to RC filter, after the this RC filter process the signal will come back to RX-2 pin3 and follow the pin3 signal to drive Motor.

TEST REPORT Report No. : AM0038501(6) Date : 2010-08-12 Page 1 of 11 FCC ID: WFE75238-27 This document is issued subject to CMA Testing standard TEARMS AND CONDITIONS, and shall not be reproduced except in full or with written approval by CMA Testing. CMA Industrial Development Foundation Limited Room 1302, Yan Hing Centre, 9-13 Wong Chuk Yeung St.., Fo Tan, Shatin, Hong Kong. Tel: (852) 2698 8198 Fax: (852) 2695 4177 E-mail: [email protected] Web Site: http://www.cmatcl.com Application No. : LM010257(4) Applicant : Playmind Ltd. Rm413-415, Houston Centre, 63 Mody Road, TST. East, Kln Sample Description : One(1) submitted sample(s) stated to be 1:24 R/C Vehicle - Twin Pack of Model No. 75238 Radio Frequency : 27.145MHz Transmitter Rating : 2 x 1.5V AA size batteries No. of submitted sample : Two (2) piece(s) Date Received : 2010-07-21. Test Period : 2010-08-04 to 2010-08-06. Test Requested : FCC Part 15 Certification. Test Method : 47 CFR Part 15 (10-1-09 Edition) and ANSI C63.4 – 2003. Test Result : See attached sheet(s) from page 2 to 11. Conclusion : The submitted sample was found to comply with requirement of FCC Part 15 Subpart C. For and on behalf of CMA Industrial Development Foundation Limited Authorized Signature : ____________________________________________________ Mr. Wong Lap-pong, Andrew Assistant Manager Electrical Division TEST REPORT Report No. : AM0038501(6) Date : 2010-08-12 Page 2 of 11 FCC ID: WFE75238-27 This document is issued subject to CMA Testing standard TEARMS AND CONDITIONS, and shall not be reproduced except in full or with written approval by CMA Testing. CMA Industrial Development Foundation Limited Room 1302, Yan Hing Centre, 9-13 Wong Chuk Yeung St.., Fo Tan, Shatin, Hong Kong. Tel: (852) 2698 8198 Fax: (852) 2695 4177 E-mail: [email protected] Web Site: http://www.cmatcl.com Table of Contents 1 General Information............................................................................................................................. 3 1.1 General Description ..................................................................................................................... 3 1.2 Location of the test site................................................................................................................ 4 1.3 List of measuring equipment ....................................................................................................... 5 1.4 Measurement Uncertainty............................................................................................................ 5 2 Description of the radiated emission test............................................................................................. 6 2.1 Test Procedure ............................................................................................................................. 6 2.2 Test Result ................................................................................................................................... 6 2.3 Radiated Emission Measurement Data ........................................................................................ 7 3 Description of the Line-conducted Test .............................................................................................. 8 3.1 Test Procedure ............................................................................................................................. 8 3.2 Test Result ................................................................................................................................... 8 3.3 Graph and Table of Conducted Emission Measurement Data .................................................... 8 4 Photograph ........................................................................................................................................... 9 4.1 Photographs of the Test Setup for Radiated Emission and Conducted Emission ....................... 9 4.2 Photographs of the External and Internal Configurations of the EUT ........................................ 9 5 Supplementary document .................................................................................................................. 10 5.1 Bandwidth.................................................................................................................................. 10 5.2 Duty cycle .................................................................................................................................. 10 5.3 Transmission time...................................................................................................................... 10 6 Appendices ........................................................................................................................................ 11 TEST REPORT Report No. : AM0038501(6) Date : 2010-08-12 Page 3 of 11 FCC ID: WFE75238-27 This document is issued subject to CMA Testing standard TEARMS AND CONDITIONS, and shall not be reproduced except in full or with written approval by CMA Testing. CMA Industrial Development Foundation Limited Room 1302, Yan Hing Centre, 9-13 Wong Chuk Yeung St.., Fo Tan, Shatin, Hong Kong. Tel: (852) 2698 8198 Fax: (852) 2695 4177 E-mail: [email protected] Web Site: http://www.cmatcl.com 1 General Information 1.1 General Description The equipment under test (EUT) is a transmitter for 1:24 R/C Vehicle - Twin Pack. It operates at 27.145MHz and the oscillation of radio control is generated by a crystal. The EUT is powered by 2 x 1.5V AA size batteries. There are four buttons on the EUT. When the buttons are pressed, it will transmit different radio control signal to receiver. The antenna is permanently attached in EUT and the radio output power is unable to adjust. The brief circuit description is listed as follows: - TX-2B and associated circuit act as an encoder. - Q1, 27.145MHz crystal and associated circuit act as an oscillator. - Q3 and associated circuit act as an amplifier. TEST REPORT Report No. : A…

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Workform Job No. Document Ref No: WF-EL-EMC-15 Page of Issue Date: 2010-01-11 Edition: 1 (Amd 2) Bandwidth Plot Bandwidth 1

Workform Job No. Document Ref No: WF-EL-EMC-15 Page of Issue Date: 2010-01-11 Edition: 1 (Amd 2) Duty Cycle Duty Cycle 1 Duty Cycle 2 Workform Job No. Document Ref No: WF-EL-EMC-15 Page of Issue Date: 2010-01-11 Edition: 1 (Amd 2) Duty Cycle Duty Cycle 3