ZYR-AT-16STUDIO FLASH TRIGGER SERIES

深圳市华标电子科技有限公司 Bontek Compliance Testing Laboratory Ltd DATE: November 30, 2011 Dear TCB Section of Timco Engineering, Inc., Thank you for cooperation. I would like to submit FCC application of GODOX PHOTO EQUIPMENT CO.LTD . FCC ID: ZYR-AT-16 by your TCB Approval today. Best Regards, Bontek Compliance Testing Laboratory Ltd. Tony Wu/General Manager

GODOX PHOTO EQUIPMENT CO.LTD FCC ID: ZYR-AT-16 POWER OF ATTORNEY November 30, 2011 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To Whom It May Concern: We, the undersigned, hereby authorize Bontek Compliance Testing Laboratory Ltd.(Tony Wu) on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Bontek Compliance Testing Laboratory Ltd. (Tony Wu) on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti-Drug Abuse Act.We, GODOX PHOTO EQUIPMENT CO.LTD are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuantto that section. Sincerely, GODOX PHOTO EQUIPMENT CO.LTD AMY Li (Engineering assistan)

External Photographs EUT –Front View EUT – Rear View

FCC ID Label Sample for FCC ID: ZYR-AT-16 FCC ID: ZYR-AT-16 Model: AT-16

FCC ID Location FCC ID Location

Internal Photographs EUT - Open View EUT - PCB View EUT - battery View

Operation description RT/AT series flash trigger is a controlling discreteness for camera to trigger studio flash synchronously. It’s equipped with MCU control system. When receiving trigger instructions from camera (or triggered manually) and different encoding states of code switch, MCU will produce different code signals and modulate them on a 433.92 MHZ ASK local oscillator circuit. After signal amplification, they will be emitted by antennae. The trigger receiver will accept the RF signal and modulate to corresponding code signals. MCU then will identify the signals and trigger synchronously the studio flash. The transmitter is powered by the 12V battery.

1234 A B C D 4 321 D C B A VDD 4 OSC1/P65 1 OSC0/P64 2 RST/VPP/P63 3 P67 5 P50 6 P51 7 P52 8 P53 9 P66 10 P62/TCC 12 P61 13 P60/INT 14 VSS 11 U2 3V 1 2 3 4 8 7 6 5 S5 D1 3V C2 S1 Vin 1 GND 2 Vout 3 U3 Q3 Q4 R8 R6 Y1 L1 L2 C5 12V C7 E1 Schematic Diagram J1 VCC

Test Report of FCC Part 15 C for FCC Certificate On Behalf of GODOX PHOTO EQUIPMENT CO.LTD Product description: Studio Flash Trigger Series Model No.: AT-16 Supplementary Model: AT-04,RT-04,RT-16 (the difference of these models is the button of DIP switches) FCC ID: ZYR- AT-16 Prepared for: GODOX PHOTO EQUIPMENT CO.LTD Room 8059 ,East Tower ,City Square Building ,JiaBin Road,Luohu District,Shenzhen 518001 , China Prepared by: Bontek Compliance Laboratory Ltd 1/F, Block East H-3, OCT Eastern Ind. Zone, Qiaocheng East Road, Nanshan, Shenzhen, China Tel: 86-755-86337020 Fax: 86-755-86337028 Report No.: BCT11HR-1167E Issue Date: November 22, 2011 Test Date: September 1~November 22, 2011 Test by: Reviewed By: Kendy Wang Tony Wu Report No.: BCT11HR-1167E Page 2 of 22 TABLE OF CONTENTS 1 - GENERAL INFORMATION ......................................................................................................................................... 4 1.1 Product Description for Equipment Under Test (EUT)..............................................................4 1.2 Test Standards...........................................................................................................................4 1.3 Test Summary............................................................................................................................4 1.4 Test Methodology ......................................................................................................................5 1.5 Test Facility................................................................................................................................5 1.6 Test Equipment List and Details................................................................................................7 2 - SYSTEM TEST CONFIGURATION............................................................................................................................. 9 2.1 Justification ................................................................................................................................9 2.2 EUT Exercise Software .............................................................................................................9 2.3 Equipment Modifications ...........................................................................................................9 2.4 Basic Test Setup Block Diagram...............................................................................................9 3 – DISTURBANCE VOLTAGE AT THE MAINS TERMINALS ..................................................................................... 11 3.1 Measurement Uncertainty .......................................................................................................11 3.2 Applicable Standard.................................................................................................................11 3.3 Test Description .......................................................................................................................11 4- RADIATED DISTURBANCES.................................................................................................................................... 12 4.1 Measurement Uncertainty .......................................................................................................12 4.2 Limit of Radiated Disturbances ...............................................................................................12 4.3 EUT Setup ...............................................................................................................................12 4.4 Test Receiver Setup ................................................................................................................13 4.5 Test Procedure ........................................................................................................................13 4.6 Corrected Amplitude & Margin Calculation .............................................................................14 4.7 Radiated Emissions Test Result .............................................................................................14 5- 20DB BANDWIDTH ................................................................................................................................................... 16 5.1 Measurement Uncertainty .......................................................................................................16 5.2 Limit of 20dB Bandwidth ..........................................................................................................16 5.3 EUT Setup ...............................................................................................................................16 5.4 Test Procedure ........................................................................................................................16 5.5 Emissions within Band Edges Test Result..............................................................................17 6- DUTY CYCLE............................................................................................................................................................. 18 6.1 Measurement Uncertainty .......................................................................................................18 6.2 EUT Setup ...............................................................................................................................18 6.3 Test Procedure ........................................................................................................................18 6.4 Measurement Result................................................................................................................18 7- TRANSMISSION TIME............................................................................................................................................... 20 7.1 Measurement Uncertainty ............................................................................…

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

TEST SETUP PHOTOGRAPHS Radiated Emission