General Information
Client Information:
Applicant: Shenzhen DOOGEE Hengtong Technology CO., LTD
Address: B, 2/F, Building A4, Silicon Valley Power Digital Industrial Park, No. 22, Dafu Industrial Zone, Guanlan Aobei Community, Guanlan Street, Longhua New District, Shenzhen, Guangdong, China
Manufacturer/Factory: Shenzhen DOOGEE Hengtong Technology CO., LTD
Address: B, 2/F, Building A4, Silicon Valley Power Digital Industrial Park, No. 22, Dafu Industrial Zone, Guanlan Aobei Community, Guanlan Street, Longhua New District, Shenzhen, Guangdong, China
Equipment Under Test (EUT) Description:
Product Name: Tablet
Model Numbers: Tab A9, Tab A9 VIP Edition, Tab A9 Pro, Tab A9 Pro VIP Edition, Tab A9+, Tab A9+ VIP Edition, Tab A9 Pro+, Tab A9 Pro+ VIP Edition, Tab A12, Tab A12 VIP Edition, Tab A13, Tab A13 VIP Edition, Tab A14, Tab A14 VIP Edition, U11 VIP Edition, U11 Pro VIP Edition, U10 VIP Edition
Operation Frequency: 2412 MHz - 2462 MHz (802.11b, g, n-HT20); 2422 MHz - 2452 MHz (802.11n-HT40)
Antenna Type: Internal Antenna
Antenna Gain: 3.27 dBi (declared by applicant)
Power Supply: Rechargeable Li-ion Battery DC 3.87V, 6580mAh
AC Adapter: Model: HJ-0502000-US, Input: AC100-240V, 50/60Hz, 0.3A, Output: DC 5.0V, 2.0A
Test Sample Condition: The test samples were provided in good working order with no visible defects.
Remark: All listed model names are identical internally, differing only in model name.
Test Mode and Environment
The EUT was tested in continuous transmitting mode with modulation.
Worst-case data rates identified for 802.11b, g, n-HT20, and n-HT40 were used for testing.
Operating Environment:
- Temperature: 15℃~35℃
- Humidity: 20%~75% RH
- Atmospheric Pressure: 1008 mbar
- Voltage: Nominal: 3.87Vdc
Test Engineer: Alan Chen (Conducted measurement), Real Chen (Radiated measurement)
Measurement Uncertainty
| Parameter | Expanded Uncertainty (Confidence of 95%(U = 2Uc(y))) |
|---|---|
| Conducted Emission for LISN (9kHz ~ 150kHz) | ±3.0 dB |
| Conducted Emission for LISN (150kHz ~ 30MHz) | ±2.4 dB |
| Radiated Emission (30MHz ~ 200MHz) (3m SAC) | ±4.6 dB |
| Radiated Emission (200MHz ~ 1000MHz) (3m SAC) | ±5.8 dB |
| Radiated Emission (1GHz ~ 6GHz) (3m SAC) | ±4.5 dB |
| Radiated Emission (6GHz ~ 18GHz) (3m SAC) | 4.7 dB |
| Radiated Emission (18GHz ~ 40GHz) (3m SAC) | 5.34 dB |
| Radiated Emission (30MHz ~ 1GHz) (3m FAR) | 3.39 dB |
| Radiated Emission (1GHz ~ 18GHz) (3m FAR) | 5.15 dB |
| Radiated Emission (18GHz ~ 40GHz) (3m FAR) | 5.30 dB |
Note: All measurement uncertainty values are shown with a coverage k=2 to indicate 95% level of confidence.
Laboratory Facility and Location
The test facility is recognized, certified, or accredited by the following organizations:
- FCC - Designation No.: CN1211
- ISED - CAB identifier.: CN0021
- CNAS - Registration No.: CNAS L15527
- A2LA - Registration No.: 4346.01 (Link: https://portal.a2la.org/scopepdf/4346-01.pdf)
Laboratory Location: JianYan Testing Group Shenzhen Co., Ltd., No.101, Building 8, Innovation Wisdom Port, No.155 Hongtian Road, Huangpu Community, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, People's Republic of China.
Test Instruments
Detailed lists of test equipment used for Radiated Emission (3m SAC, 3m FAR) and Conducted Emission measurements are provided in the original document.
Summary of Test Instruments (Radiated Emission):
| Test Equipment | Manufacturer | Model No. | Manage No. | Cal. Date (mm-dd-yy) | Cal. Due date (mm-dd-yy) |
|---|---|---|---|---|---|
| 3m SAC | ETS | 9m*6m*6m | WXJ001-1 | 04-14-2021 | 04-13-2026 |
| Loop Antenna | Schwarzbeck | FMZB 1519 B | WXJ002-4 | 01-03-2025 | 01-02-2026 |
| BiConiLog Antenna | Schwarzbeck | VULB9163 | WXJ002 | 01-03-2025 | 01-02-2026 |
| Horn Antenna | Schwarzbeck | BBHA9120D | WXJ002-2 | 01-03-2025 | 01-02-2026 |
| Pre-amplifier (30MHz~1GHz) | Schwarzbeck | BBV9743B | WXJ001-2 | 12-16-2024 | 12-15-2025 |
| Pre-amplifier (1GHz~18GHz) | SKET | LNPA_0118G-50 | WXJ001-3 | 12-16-2024 | 12-15-2025 |
| EMI Test Receiver | Rohde & Schwarz | ESRP7 | WXJ003-1 | 12-16-2024 | 12-15-2025 |
| Spectrum Analyzer | KEYSIGHT | N9010B | WXJ004-2 | 09-09-2024 | 09-08-2025 |
| Coaxial Cable (30MHz~1GHz) | JYTSZ | JYT3M-1G-NN-8M | WXG001-4 | 01-15-2025 | 01-14-2026 |
| Coaxial Cable (1GHz~18GHz) | JYTSZ | JYT3M-18G-NN-8M | WXG001-5 | 01-15-2025 | 01-14-2026 |
| Test Software | Tonscend | TS+ | Version: 3.0.0.1 |
Summary of Test Instruments (Conducted Emission):
| Test Equipment | Manufacturer | Model No. | Manage No. | Cal. Date (mm-dd-yy) | Cal. Due date (mm-dd-yy) |
|---|---|---|---|---|---|
| EMI Test Receiver | Rohde & Schwarz | ESR3 | WXJ003-2 | 06-11-2024 | 06-10-2025 |
| LISN | Schwarzbeck | NSLK 8127 | QCJ001-13 | 12-17-2024 | 12-16-2025 |
| LISN | Rohde & Schwarz | ESH3-Z5 | WXJ005-1 | 12-17-2024 | 12-16-2025 |
| Test Software | AUDIX | E3 | Version: 6.110919b |
Measurement Setup and Procedure
Test Channel Selection: Testing was performed on the lowest, middle, and highest channels for each frequency band (802.11b, g, n-HT20, n-HT40).
Test Setup:
- Conducted Emission Measurement: The EUT and simulators were connected to the main power through a Line Impedance Stabilization Network (LISN). Peripheral devices were also connected via a LISN.
- Radiated Emission Measurement (Below 1GHz): The EUT was placed on a tabletop in a semi-anechoic chamber, with the measurement distance to the receiving antenna at 3 meters. The EUT was tested in various orientations (X, Y, Z axes) and configurations to find the worst-case position. Antenna height was varied between 1m and 4m, and polarization (vertical/horizontal) was adjusted.
- Radiated Emission Measurement (Above 1GHz): Similar to below 1GHz, but conducted in a fully anechoic room. The EUT was placed on a tabletop at 1.5m height.
- Conducted Test Method: The Wi-Fi antenna port of the EUT was connected to the test port of the test system via an RF cable. The EUT was kept in continuous transmission mode across all modulation modes.
Test Results Summary
| Test Items | Standard Clause | Test Data | Result |
|---|---|---|---|
| Antenna Requirement | 15.203 | See Section 5.2 | Pass |
| AC Power Line Conducted Emission | 15.207 | See Section 5.3 | Pass |
| Duty Cycle | ANSI C63.10-2013 | Appendix A- 2.4G Wi-Fi | Pass |
| Conducted Output Power | 15.247 (b)(3) | Appendix A- 2.4G Wi-Fi | Pass |
| 6dB Emission Bandwidth | 15.247 (a)(2) | Appendix A- 2.4G Wi-Fi | Pass |
| 99% Occupied Bandwidth | Appendix A- 2.4G Wi-Fi | Pass | |
| Power Spectral Density | 15.247 (e) | Appendix A- 2.4G Wi-Fi | Pass |
| Band-edge Emission | 15.247 (d) | Appendix A- 2.4G Wi-Fi | Pass |
| Conduction Spurious Emission | 15.205 | See Section 5.4 | Pass |
| Emissions in Restricted Frequency Bands | 15.247 (d) | See Section 5.4 | Pass |
| Emissions in Non-restricted Frequency Bands | 15.209, 15.247(d) | See Section 5.5 | Pass |
Test Method: ANSI C63.10-2013, KDB 558074 D01 15.247 Meas Guidance v05r02
Antenna Requirement: The EUT uses an internal antenna with a gain of 3.27 dBi, which complies with FCC Part 15.203 and 15.247 requirements.
AC Power Line Conducted Emission: Testing was performed for Line and Neutral phases. Results showed compliance with FCC Part 15.247 limits.
Emissions in Restricted Frequency Bands: Measurements were conducted for various channels and modes. All detected emissions were within the specified limits.
Emissions in Non-restricted Frequency Bands: Measurements were conducted for various channels and modes. All detected emissions were within the specified limits.
The detailed data for conducted emissions, restricted frequency bands, and non-restricted frequency bands are presented in the original report.
