TEST REPORT
BLUETOOTH WIRELESS HEADPHONES
| Product Name | BLUETOOTH WIRELESS HEADPHONES |
| Brand Mark | Monster |
| Model No. | Monster Airmars XKT08 |
| FCC ID | 2A8PV-QSMXKT08 |
| Report Number | BLA-EMC-202209-A4401 |
| Date of Sample Receipt | 2022/9/20 |
| Date of Test | 2022/9/20 to 2022/9/27 |
| Date of Issue | 2022/9/27 |
| Test Standard | 47 CFR Part 15, Subpart B |
| Test Result | Pass |
Prepared for: Shenzhen Information Infinity Co., Ltd.
Address: 1st Floor, Building a, Clean Sunshine Park, No. 15, Keji North 2nd Road, Songpi
Prepared by: BlueAsia of Technical Services(Shenzhen) Co.,Ltd.
Address: Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China
TEL: +86-755-23059481
Compiled by: Charlie
Approved by: Shie Thong
Review by: Sueals
Date: 2022/9/27
REPORT REVISE RECORD
| Version No. | Date | Description |
|---|---|---|
| 00 | 2022/9/27 | Original |
1 TEST SUMMARY
| Test item | Test Requirement | Test Method | Class/Severity | Result |
|---|---|---|---|---|
| Radiated Emissions (above 1GHz) | 47 CFR Part 15, Subpart B | ANSI C63.4:2014 | Class B | Pass |
| Radiated Emissions (30MHz-1GHz) | 47 CFR Part 15, Subpart B | ANSI C63.4:2014 | Class B | Pass |
| Conducted Emissions at Mains Terminals (150kHz-30MHz) | 47 CFR Part 15, Subpart B | ANSI C63.4:2014 | Class B | Pass |
2 GENERAL INFORMATION
| Applicant | Shenzhen Information Infinity Co., Ltd. |
| Address | 1st Floor, Building a, Clean Sunshine Park, No. 15, Keji North 2nd Road, Songpi |
| Manufacturer | Shenzhen Information Infinity Co., Ltd. |
| Address | 1st Floor, Building a, Clean Sunshine Park, No. 15, Keji North 2nd Road, Songpingshan Community, Xili street, Nanshan District, Shenzhen,China |
| Factory | Shenzhen Information Infinity Co., Ltd. |
| Address | 1st Floor, Building a, Clean Sunshine Park, No. 15, Keji North 2nd Road, Songpingshan Community, Xili street, Nanshan District, Shenzhen,China |
| Product Name | BLUETOOTH WIRELESS HEADPHONES |
| Test Model No. | Monster Airmars XKT08 |
3 GENERAL DESCRIPTION OF E.U.T.
| Hardware Version | V1.2 |
| Software Version | V17 |
| Power Supply | Battery:DC 3.7V |
4 TEST MODE
| TEST MODE | TEST MODE DESCRIPTION |
|---|---|
| Charging | Keep the battery of the EUT in charging mode |
| Operation(BT) | Pair the device with Smartphone via Bluetooth and keep the music playing. |
Remark:Only the data of the worst mode would be recorded in this report.
5 MEASUREMENT UNCERTAINTY
| Parameter | Expanded Uncertainty (Confidence of 95%) |
|---|---|
| Radiated Emission(9kHz-30MHz) | 4.34dB |
| Radiated Emission(30Mz-1000MHz) | 4.24dB |
| Radiated Emission(1GHz-18GHz) | 4.68dB |
| AC Power Line Conducted Emission(150kHz-30MHz) | 3.45dB |
6 DESCRIPTION OF SUPPORT UNIT
| Device Type | Manufacturer | Model Name | Serial No. | Remark |
|---|---|---|---|---|
| AC Adapter | PISEN | TS-C051 | N/A | N/A |
7 LABORATORY LOCATION
All tests were performed at:
BlueAsia of Technical Services(Shenzhen) Co., Ltd.
Address: Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China
Telephone: TEL: +86-755-28682673 FAX: +86-755-28682673
No tests were sub-contracted.
8 TEST INSTRUMENTS LIST
Test Equipment Of Radiated Emissions (above 1GHz)
| Equipment | Manufacturer | Model | S/N | Cal.Date | Cal.Due |
|---|---|---|---|---|---|
| Chamber | SKET | 966 | N/A | 10/11/2020 | 9/11/2023 |
| Spectrum | R&S | FSP40 | 100817 | 24/9/2021 | 23/9/2023 |
| Horn Antenna | Schwarzbeck | 9120D | 01892 P:00331 | 26/9/2020 | 25/9/2023 |
| Amplifier | SKET | LNPA-0118-45 | N/A | 24/9/2021 | 23/9/2023 |
| EMI software | EZ | EZ-EMC | N/A | N/A | N/A |
Test Equipment Of Radiated Emissions (30MHz-1GHz)
| Equipment | Manufacturer | Model | S/N | Cal.Date | Cal.Due |
|---|---|---|---|---|---|
| Chamber | SKET | 966 | N/A | 10/11/2020 | 9/11/2023 |
| Receiver | R&S | ESR7 | 101199 | 24/9/2021 | 23/9/2023 |
| EMI software | EZ | EZ-EMC | N/A | N/A | N/A |
| broadband Antenna | Schwarzbeck | VULB9168 | 00836 P:00227 | 26/9/2020 | 25/9/2023 |
Test Equipment Of Conducted Emissions at Mains Terminals (150kHz-30MHz)
| Equipment | Manufacturer | Model | S/N | Cal.Date | Cal.Due |
|---|---|---|---|---|---|
| Shield room | SKET | 833 | N/A | 25/11/2020 | 24/11/2023 |
| Receiver | R&S | ESP13 | 101082 | 24/9/2021 | 23/9/2023 |
| LISN | R&S | ENV216 | 3560.6550.15 | 24/9/2021 | 23/9/2023 |
| LISN | AT | AT166-2 | AKK1806000003 | 26/9/2021 | 25/9/2023 |
| EMI software | EZ | EZ-EMC | N/A | N/A | N/A |
9 RADIATED EMISSIONS (ABOVE 1GHZ)
| Test Standard | 47 CFR Part 15, Subpart B |
| Test Method | ANSI C63.4:2014 |
| Test Mode (Pre-Scan) | Charging;Operation(BT) |
| Test Mode (Final Test) | Operation(BT) |
| Tester | Charlie |
| Temperature | 25 ℃ |
| Humidity | 60% |
9.1 LIMITS
| Frequency Range | Limit |
|---|---|
| Above 1GHz | 74(dBuV/m) peak, 54(dBμV/m) average |
9.2 BLOCK DIAGRAM OF TEST SETUP
Diagram showing a test chamber with an antenna tower, horn antenna, EUT on a turntable, ground reference plane, spectrum analyzer, amplifier, and controller.
9.3 PROCEDURE
An initial pre-scan was performed in the chamber using the spectrum analyser in peak detection mode. Average measurements were conducted based on the peak sweep graph. The EUT was measured by Horn antenna with 2 orthogonal polarities.
9.4 TEST DATA
[TestMode: Operation(BT)]; [Polarity: Horizontal]
| No. | Mk. | Freq. MHz | Reading Level dBuV | Correct Factor dB/m | Measurement dBuV/m | Limit dBuV/m | Over dB | Detector | Comment |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1885.000 | 43.95 | -5.95 | 38.00 | 74.00 | -36.00 | peak | ||
| 2 | 2635.000 | 42.63 | -4.12 | 38.51 | 74.00 | -35.49 | peak | ||
| 3 | 3450.000 | 43.71 | -3.03 | 40.68 | 74.00 | -33.32 | peak | ||
| 4 | 4125.000 | 41.89 | 0.74 | 42.63 | 74.00 | -31.37 | peak | ||
| 5 | 5395.000 | 40.42 | 4.30 | 44.72 | 74.00 | -29.28 | peak | ||
| 6 | * | 5910.000 | 40.25 | 4.69 | 44.94 | 74.00 | -29.06 | peak |
[TestMode: Operation(BT)]; [Polarity: Vertical]
| No. | Mk. | Freq. MHz | Reading Level dBuV | Correct Factor dB/m | Measurement dBuV/m | Limit dBuV/m | Over dB | Detector | Comment |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2300.000 | 42.98 | -4.31 | 38.67 | 74.00 | -35.33 | peak | ||
| 2 | 3030.000 | 43.75 | -3.99 | 39.76 | 74.00 | -34.24 | peak | ||
| 3 | 3585.000 | 41.77 | -2.01 | 39.76 | 74.00 | -34.24 | peak | ||
| 4 | 4070.000 | 42.93 | 0.41 | 43.34 | 74.00 | -30.66 | peak | ||
| 5 | 4925.000 | 40.91 | 2.64 | 43.55 | 74.00 | -30.45 | peak | ||
| 6 | * | 5625.000 | 40.25 | 4.65 | 44.90 | 74.00 | -29.10 | peak |
Test Result: Pass
10 RADIATED EMISSIONS (30MHZ-1GHZ)
| Test Standard | 47 CFR Part 15, Subpart B |
| Test Method | ANSI C63.4:2014 |
| Test Mode (Pre-Scan) | Charging;Operation(BT) |
| Test Mode (Final Test) | Charging |
| Tester | Charlie |
| Temperature | 25 ℃ |
| Humidity | 60% |
10.1 LIMITS
| Frequency Range | Limit |
|---|---|
| 30MHz -88MHz | 40.0(dBuV/m) quasi-peak |
| 88MHz-216MHz | 43.5(dBuV/m) quasi-peak |
| 216MHz-960MHz | 46.0(dBuV/m) quasi-peak |
| 960MHz-1000MHz | 54.0(dBuV/m) quasi-peak |
10.2 BLOCK DIAGRAM OF TEST SETUP
Diagram showing a test chamber with an antenna tower, BiConiLog antenna, EUT on a turntable, ground reference plane, spectrum analyzer, and controller.
10.3 PROCEDURE
An initial pre-scan was performed in the chamber using the spectrum analyser in peak detection mode. Quasi-peak measurements were conducted based on the peak sweep graph. The EUT was measured by BiConiLog antenna with 2 orthogonal polarities.
10.4 TEST DATA
[TestMode: Charging]; [Polarity: Horizontal]
| No. | Mk. | Freq. MHz | Reading (dBuV) | Factor (dB/m) | Level (dBuV/m) | Limit (dBuV/m) | Margin (dB) | Detector | P/F | Remark |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 32.1794 | 0.95 | 22.13 | 23.08 | 40.00 | -16.92 | QP | P | ||
| 2 | 56.5929 | -0.51 | 22.96 | 22.45 | 40.00 | -17.55 | QP | P | ||
| 3 | 121.1231 | -0.88 | 22.31 | 21.43 | 43.50 | -22.07 | QP | P | ||
| 4 | 214.5142 | -1.54 | 21.18 | 19.64 | 43.50 | -23.86 | QP | P | ||
| 5 | 325.5958 | 0.69 | 24.16 | 24.85 | 46.00 | -21.15 | QP | P | ||
| 6 | * | 627.2737 | 1.78 | 30.96 | 32.74 | 46.00 | -13.26 | QP | P |
[TestMode: Charging]; [Polarity: Vertical]
| No. | Mk. | Freq. MHz | Reading (dBuV) | Factor (dB/m) | Level (dBuV/m) | Limit (dBuV/m) | Margin (dB) | Detector | P/F | Remark |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 47.8260 | -0.71 | 23.17 | 22.46 | 40.00 | -17.54 | QP | P | ||
| 2 | 86.2001 | 3.80 | 19.00 | 22.80 | 40.00 | -17.20 | QP | P | ||
| 3 | 146.8877 | 0.11 | 22.97 | 23.08 | 43.50 | -20.42 | QP | P | ||
| 4 | 240.8304 | -0.92 | 22.43 | 21.51 | 46.00 | -24.49 | QP | P | ||
| 5 | 392.0951 | 0.05 | 26.36 | 26.41 | 46.00 | -19.59 | QP | P | ||
| 6 | * | 616.3718 | 0.74 | 30.86 | 31.60 | 46.00 | -14.40 | QP | P |
Test Result: Pass
11 CONDUCTED EMISSIONS AT MAINS TERMINALS (150KHZ-30MHZ)
| Test Standard | 47 CFR Part 15, Subpart B |
| Test Method | ANSI C63.4:2014 |
| Test Mode (Pre-Scan) | Charging;Operation(BT) |
| Test Mode (Final Test) | Charging |
| Tester | Charlie |
| Temperature | 25 ℃ |
| Humidity | 60% |
11.1 LIMITS
| Frequency Range | Limit |
|---|---|
| 0.15M-0.5MHz | 66dB(µV)-56dB(µV) quasi-peak, 56dB(µV)-46dB(µV) average |
| 0.5M-5MHz | 56dB(µV) quasi-peak, 46dB(µV) average |
| 5M-30MHz | 60dB(µV) quasi-peak, 50dB(µV) average |
11.2 BLOCK DIAGRAM OF TEST SETUP
Diagram showing a test setup with LISN, E.U.T., AC power, filter, and EMI receiver, with a reference plane and specific distances indicated.
11.3 PROCEDURE
An initial pre-scan was performed with peak detector. Quasi-Peak or Average measurement were performed at the frequencies with maximized peak emission were detected.
11.4 TEST DATA
[TestMode: Charging]; [Line: Line]
| No. | Mk. | Freq. MHz | Reading dBuV | Correct Factor dB | Measurement dBuV | Limit dBuV | Over dB | Detector | Comment |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.3460 | 20.74 | 9.85 | 30.59 | 59.06 | -28.47 | QP | ||
| 2 | 0.3460 | 13.60 | 9.85 | 23.45 | 49.06 | -25.61 | AVG | ||
| 3 | 0.6140 | 29.53 | 9.88 | 39.41 | 56.00 | -16.59 | QP | ||
| 4 | * | 0.6140 | 22.26 | 9.88 | 32.14 | 46.00 | -13.86 | AVG | |
| 5 | 1.5700 | 18.43 | 9.93 | 28.36 | 56.00 | -27.64 | QP | ||
| 6 | 1.5700 | 11.02 | 9.93 | 20.95 | 46.00 | -25.05 | AVG | ||
| 7 | 4.1340 | 15.93 | 9.98 | 25.91 | 56.00 | -30.09 | QP | ||
| 8 | 4.1340 | 7.82 | 9.98 | 17.80 | 46.00 | -28.20 | AVG | ||
| 9 | 7.4740 | 9.86 | 10.11 | 19.97 | 60.00 | -40.03 | QP | ||
| 10 | 7.4740 | 2.24 | 10.11 | 12.35 | 50.00 | -37.65 | AVG | ||
| 11 | 19.7099 | 1.26 | 10.43 | 11.69 | 60.00 | -48.31 | QP | ||
| 12 | 19.7099 | -5.41 | 10.43 | 5.02 | 50.00 | -44.98 | AVG |
[TestMode: Charging]; [Line: Nutral]
| No. | Mk. | Freq. MHz | Reading dBuV | Correct Factor dB | Measurement dBuV | Limit dBuV | Over dB | Detector | Comment |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.2900 | 17.40 | 9.77 | 27.17 | 60.52 | -33.35 | QP | ||
| 2 | 0.2900 | 11.59 | 9.77 | 21.36 | 50.52 | -29.16 | AVG | ||
| 3 | 0.6100 | 24.18 | 9.80 | 33.98 | 56.00 | -22.02 | QP | ||
| 4 | * | 0.6100 | 16.79 | 9.80 | 26.59 | 46.00 | -19.41 | AVG | |
| 5 | 1.6100 | 13.45 | 9.85 | 23.30 | 56.00 | -32.70 | QP | ||
| 6 | 1.6100 | 8.18 | 9.85 | 18.03 | 46.00 | -27.97 | AVG | ||
| 7 | 3.4700 | 10.11 | 9.90 | 20.01 | 56.00 | -35.99 | QP | ||
| 8 | 3.4700 | 2.44 | 9.90 | 12.34 | 46.00 | -33.66 | AVG | ||
| 9 | 7.6940 | 2.14 | 10.04 | 12.18 | 60.00 | -47.82 | QP | ||
| 10 | 7.6940 | -4.79 | 10.04 | 5.25 | 50.00 | -44.75 | AVG | ||
| 11 | 19.4660 | -1.75 | 10.41 | 8.66 | 60.00 | -51.34 | QP | ||
| 12 | 19.4660 | -8.03 | 10.41 | 2.38 | 50.00 | -47.62 | AVG |
Test Result: Pass
APPENDIX A: PHOTOGRAPHS OF TEST SETUP
Radiated Emissions (above 1GHz)
Photograph of the test setup for Radiated Emissions (above 1GHz), showing an anechoic chamber with an antenna positioned above a turntable holding the EUT.
Radiated Emissions (30MHz-1GHz)
Photograph of the test setup for Radiated Emissions (30MHz-1GHz), showing an anechoic chamber with a BiConiLog antenna positioned above a turntable holding the EUT.
APPENDIX B: PHOTOGRAPHS OF EUT
Photographs of the Monster Airmars XKT08 Bluetooth Wireless Headphones and its charging case from various angles. Images show the earbuds and case with ruler markings for scale. Details like the 'MONSTER' branding and model number are visible. Some images show the internal components, including the battery (3.7V 300mAh) and circuit boards with labels like 'BSX-ME88-CDH V1.3' and 'DZB V1.0'.
