VK7AST258TX-UWireless Speaker System

FCC INFORMATION 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. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End users must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This device complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. The antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. 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. The installer of this radio equipment must ensure that the antenna is located or pointed such that it does not emit RF field in excess of Health Canada limits for the general population; consult Safety Code 6, obtainable from Heath Canada’s website www.hc-sc.gc.ca/rpb.

Photo 1 Appearance of EUT Photo 2 Appearance of EUT

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. Model: AST258TX-U FCC ID: VK7AST258TX-U IC ID: 7314A-AST258TXU MAINSTAR ELECTRICAL COMPANY LTD.

Photo 1 Inside of EUT Photo 2 Inside of EUT Photo 3 Inside of EUT Photo 4 Inside of EUT Photo 5 Inside of EUT

Page 1/37 EMC TEST REPORT For Wireless Speaker System Model Number: AST258TX-U,AST158TX-U,AST358TX-U,AST458TX-U, AST558TX-U,AST658TX-U,AST758TX-U,AST858TX-U, AST958TX-U,AST168TX-AU,AST268TX-AU,AST368TX-AU, AST468TX-AU,AST568TX-AU,AST668TX-AU,AST768TX-AU, AST868TX-AU,AST968TX-AU,AST168TX-U,AST268TX-U, AST368TX-U,AST468TX-U,AST568TX-U,AST668TX-U, AST768TX-U,AST868TX-U,AST968TX-U，AST238AV, AST512AV，AST288A-8 FCC ID: VK7AST258TX-U Report Number : WT078001428 Test Laboratory : Shenzhen Academy of Metrology and Quality Inspection EMC Laboratory Guangdong EMC Compliance Test Center Site Location : Bldg. of Metrology &Quality Inspection, Longzhu Road, Shenzhen, Guangdong, China Tel : 0086-755-26941637, 26941529, 26941531 Fax : 0086-755-26941545 Email : [email protected] Report No.: WT078001428 Page 2/37 TABLE OF CONTENTS TEST REPORT DECLARATION ........................................................................................................3 1. TEST RESULTS SUMMARY ...................................................................................................4 2. GENERAL INFORMATION ....................................................................................................5 2.1. Report information ............................................................................................................5 2.2. Laboratory Accreditation and Relationship to Customer .................................................5 2.3. Measurement Uncertainty .................................................................................................5 3. PRODUCT DESCRIPTION ......................................................................................................6 3.1. EUT Description ...............................................................................................................6 3.2. Related Submittal(s) / Grant (s) ........................................................................................6 3.3. Block Diagram of EUT Configuration..............................................................................7 3.4. Operating Condition of EUT ............................................................................................7 3.5. Standard test voltage .........................................................................................................7 3.6. Special Accessories...........................................................................................................7 3.7. Equipment Modifications..................................................................................................7 3.8. Support Equipment List ....................................................................................................8 3.9. Test Conditions .................................................................................................................8 4. TEST EQUIPMENT USED .......................................................................................................9 5. CONDUCTED DISTURBANCE TEST ..................................................................................10 5.1. Test Standard and Limit ..................................................................................................10 5.2. Test Procedure ................................................................................................................10 5.3. Test Arrangement............................................................................................................10 5.4. Test Data .........................................................................................................................10 6. RADIATED DISTURBANCE TEST ......................................................................................17 6.1. Test Standard and Limit ..................................................................................................17 6.2. Test Procedure ................................................................................................................17 6.3. Test Arrangement............................................................................................................17 6.4. Test Data .........................................................................................................................18 7. OCCUPIED BANDWIDTH .....................................................................................................22 7.1. Test Standard and Limit ..................................................................................................22 7.2. Test Procedure ................................................................................................................22 7.3. Test Arrangement............................................................................................................22 7.4. Test Data .........................................................................................................................22 8. BAND EDGE .............................................................................................................................25 8.1. Test Standard and Limit ..................................................................................................25 8.2. Band Edge FCC 15.249(d) Limit ....................................................................................25 8.3. Test Procedure ................................................................................................................25 8.4. Test Arrangement............................................................................................................25 8.5. Test Data .........................................................................................................................25 9. ANTENNA REQUIREMENT .................................................................................................28 9.1. STANDARD APPLICABLE.........................................................................................…

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Photo 1 Conducted Emission Test Photo2 Conducted Emission Test Photo 3 Radiated Emission Test Photo 4 Radiated Emission Test Photo 5 Radiated Emission Test