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5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 FCC Part 15 Subpart C Certification Test Report FCC ID: OUERFT1TX FCC Rule Part: 15.231 ACS Report Number: 06-0488-15C Manufacturer: Paul C. Buff Inc. Model: RFT1TX User’s Manual

December 12, 2006 Federal Communications Commission Office of Engineering and Technology 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir, We ( Paul C. Buff Inc.) respectfully request that the schematic diagrams, block diagram, and the circuit descriptions submitted with this application for Certification under FCC ID: OUERFT1TX be withheld from public disclosure. This documentation has been provided in the following files: 06-0488 – Schematics.pdf 06-0488 – Parts List.pdf 06-0488 – Theory of Operation.pdf 06-0488 – System Block Diagram.pdf This request is made under the provision of Section 0.457 (d) of the Commission’s rules and Section 0.552 (b) of the Freedom of Information Act. The items listed above contain trade secrets and proprietary information which if disclosed to the public may be harmful to the applicant and place Paul C. Buff at a competitive disadvantage. Thank you for your attention to this matter. Sincerely, Kris Steer Paul C. Buff Inc.

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 FCC Part 15 Subpart C Certification Test Report FCC ID: OUERFT1TX FCC Rule Part: 15.231 ACS Report Number: 06-0488-15C Manufacturer: Paul C. Buff Inc. Model: RFT1TX External Photographs Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 1: External - Top Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 2: External - Bottom Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 3: External – Front Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 4: External - Back Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 5: External - Side

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 FCC Part 15 Subpart C Certification Test Report FCC ID: OUERFT1TX FCC Rule Part: 15.231 ACS Report Number: 06-0488-15C Manufacturer: Paul C. Buff Inc. Model: RFT1TX Label Information Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Label Sample and Location: To be printed on vinyl and attached with permanent adhesive. Compliance statements will be provided within the manual. Figure 1: Label Information – Label Location Model: RFT1TX FCC ID: OUERFT1TX IC: 6866A-RFT1TX Label Location

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 FCC Part 15 Subpart C Certification Test Report FCC ID: OUERFT1TX FCC Rule Part: 15.231 ACS Report Number: 06-0488-15C Manufacturer: Paul C. Buff Inc. Model: RFT1TX Internal Photographs Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 1: Internal – PCB Front Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 2: Internal – PCB Back

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 FCC Part 15 Subpart C Certification Test Report FCC ID: OUERFT1TX FCC Rule Part: 15.231 ACS Report Number: 06-0488-15C Manufacturer: Paul C. Buff Inc. Model: RFT1TX Test Begin Date: December 18, 2006 Test End Date: April 26, 2007 Report Issue Date: April 30, 2007 FOR THE SCOPE OF ACCREDITATION UNDER LAB Code 200612 Prepared by: Reviewed by: Jeff Woods Wireless Certification Engineer ACS, Inc. J. Kirby Munroe Manager Wireless Certifications ACS, Inc. This test report shall not be reproduced except in full. This report may be reproduced in part with prior written consent of ACS, Inc. The results contained in this report are representative of the sample(s) submitted for evaluation. This report contains 12 pages 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Table of Contents 1.0 General 3 1.1 Purpose 3 1.2 Product Description 3 1.2.1 General 3 1.2.2 Intended Use 3 1.3 Test Methodology and Considerations 3 2.0 Test Facilities 4 2.1 Location 4 2.2 Laboratory Accreditations/Recognitions/Certifications 4 2.3 Radiated Emissions Test Site Description 5 2.3.1 Semi-Anechoic Chamber Test Site 5 2.3.2 Open Area Tests Site (OATS) 6 3.0 Applicable Standards and References 7 4.0 List of Test Equipment 7 5.0 Support Equipment 8 6.0 EUT Setup Block Diagram 8 7.0 Summary of Tests 9 7.1 Section 15.203 - Antenna Requirement 9 7.2 Section 15.231(a1) – Periodic Operation 9 7.2.1 Test Methodology 9 7.2.2 Test Results 9 7.3 Section 15.231(c) – Occupied Bandwidth 10 7.3.1 Test Methodology 10 7.3.2 Test Results 10 7.4 Section 15.231(b) – Field Strength of Emissions 10 7.4.1 Test Methodology 10 7.4.3 Duty Cycle Correction Factor 10 7.4.2 Test Results 11 7.4.4 Sample Calculation 11 8.0 CONCLUSION 11 Additional Exhibits Included In Filing Internal Photographs External Photographs Test Setup Photographs Product Labeling Installation/Users Guide Theory of Operation BOM (Parts List) System Block Diagram Schematics Model: RFT1TX FCC ID: OUERFT1TX ACS Report: 06-0488-15C Advanced Compliance Solutions Page 3 1.0 GENERAL 1.1 Purpose The purpose of this report is to demonstrate compliance with Part 15.231, Subpart C of the FCC’s Code of Federal Regulations. 1.2 Product Description 1.2.1 General The RFT1 Photo Flash Trigger System consists of a transmitter and a minimum of one receiver. The transmitter incorporates a three section DIP switch used to select one of eight unique codes, or addresses. The transmitter is normally mounted atop a professional SLR-type camera using the hot shoe mounting fixment. The transmitter is self-contained, and is powered by a primary battery. Applicant Information: Paul C. Buff Inc. 2725 Bransford Ave. Nashville, TN, 37204 Detailed photographs of the EUT are filed separately with this filing. 1.2.2 Intended Use The RFT1TX is intended to be used as a wireless flash trigger for photography applications. 1.3 Test Methodology and Considerations The purpose of compliance testing the equipment under test was supplied with an external trigger cable fitted with a 9VDC battery which was used to continuously trigger the transmitter. This modified trigger cable is not utilized in the normal operation of the device and was supplied for the sole purpose of providing an appropriate mode of operation for testing. Model: RFT1TX FCC ID: OUERFT1TX ACS Report: 06-0488-15C Advanced Compliance Solutions Page 4 2.0 TEST FACILITIES 2.1 Location The radiated and conducted emissions test sites are located at the following address: Advanced Compliance Solutions 5015 B.U. Bowman Drive Buford, GA 30518 Phone: (770) 831-8048 Fax: (770) 831-8598 2.2 Laboratory Accreditations/Recognitions/Certifications The Semi-Anechoic Chamber Test Site, Open Area Test Site (OATS) and Conducted Emissions Site have been fully described, submitted to, and accepted by the FCC, Industry Canada and the Japanese Voluntary Control Council for Interference by information technology equipment. In addition, ACS is compliant to ISO 17025 as certified by the National Institute of Standards and Technology under their National Voluntary Laboratory Accreditation Program. The following certification numbers have been issued in recognition of these accreditations and certifications: FCC Registration Number: 89450 Industry Canada Lab Code: IC 4175 VCCI Member Number: 1831 ƒ VCCI OATS Registration Number R-1526 ƒ VCCI Conducted Emissions Site Registration Number: C-1608 NVLAP Lab Code: 200612-0 Model: RFT1TX FCC ID: OUERFT1TX ACS Report: 06-0488-15C Advanced Compliance Solutions Page 5 2.3 Radiated Emissions Test Site Description 2.3.1 Semi-Anechoic Chamber Test Site The Semi-Anechoic Chamber Test Site consists of a 20’ x 30’ x 18’ shielded enclosure. The chamber is lined with Toyo Ferrite Grid Absorber, model number FFG-1000. The ferrite tile grid is 101 x 101 x 19mm thick and weighs approximately 550 grams. These tiles are mounted on steel panels and installed directly on the inner walls of the chamber. The turntable is 150cm in diameter and is located 160cm from the back wall of the chamber. The chamber is grounded via 1 - 8’ copper ground rod, installed at the center of the back wall, it is bound to the ground plane using 3/4" stainless steel braided cable. The turntable is all steel, flush mounted table installed in an all steel frame. The table is remotely operated from inside the control room located 25’ from the range. The turntable is electrically bonded to the surrounding ground plane via steel fingers installed on the edge of the turn table. The steel fingers make constant contact with the ground plane during operation. Behind the turntable is a 3’ x 6’ x 4’ deep shielded pit used for support equipment if necessary. The pit is equipped with 1 - 4” PVC chases from the turntable to the pit that allow for cabling to the EUT if necessary. The underside of the turntable can be accessed from the pit so cables can be supplied to the EUT fr…

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5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 FCC Part 15 Subpart C Certification Test Report FCC ID: OUERFT1TX FCC Rule Part: 15.231 ACS Report Number: 06-0488-15C Manufacturer: Paul C. Buff Inc. Model: RFT1TX Test Setup Photographs Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 1: Test Setup – Radiated Emissions Model: RFT1TX FCC ID: OUERFT1TX 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598 Figure 2: Test Setup – Radiated Emissions