TIRT Testing Report

1. Summary of Standards and Results

1.1. Description of Standards and Results

The EUT (Equipment Under Test) has been tested according to the applicable standards as referenced below:

Note: 1. P is an abbreviation for Pass. 2. F is an abbreviation for Fail. 3. N/A is an abbreviation for Not Applicable. 4. The conclusion of this test report is judged by actual test data without considering measurement uncertainty.

2. General Information

2.1. Description of Device (EUT)

EUT Name: Tablet

Model No.: U7, U7 Kid, U7 Pro, U7S, U7 SE, U7 Ultra, U7 Max, U7E

Difference (DIFF.): There is no difference except the name of the model. All tests are made with the U7 model.

Power supply: DC 3.85V from battery or DC 5V from adapter

2.4G WIFI

Operation frequency: 2412MHz-2462MHz for IEEE 802.11 b, g, n/HT20; 2422MHz~2452MHz for IEEE802.11n/HT40

Channel No.: 802.11b/802.11g /802.11n(HT20): 11CH; 802.11(HT40): 7CH

Modulation type: IEEE 802.11b: DSSS(CCK,DQPSK,DBPSK); IEEE 802.11g: OFDM(64QAM, 16QAM, QPSK, BPSK); IEEE 802.11n :OFDM(64QAM, 16QAM, QPSK, BPSK)

Antenna Type: PIFA antenna, Maximum Gain is 1.5dBi. Antenna information is provided by applicant.

Software version: DOOGEE-U7-EEA-Android10.0-20230922

Hardware version: Q30-T616-V1.0-230612-L1

Intended use environment: Residential, commercial and light industrial environment

2.2. Accessories of Device (EUT)

Accessories: Adapter

Manufacturer: /

Model: DGCDQ-BC023-02

Ratings: Input: 100-240V, 50/60Hz 0.35A Max; Output: 5.0V 2.0A 10.0W

2.3. Tested Supporting System Details

2.4. Block Diagram of connection between EUT and simulators

A block diagram shows a 'Supporting System' connected to the 'EUT' (Equipment Under Test).

2.5. Test Mode Description

Duty cycle: 100% Keeping TX

Note: According to exploratory test, EUT will have maximum output power in those data rates, so those data rates were used for all tests.

Channel List:

For IEEE 802.11b, g, n/HT20

For IEEE 802.11 n/HT40

2.6. Test Conditions

2.7. Test Facility

Company: Beijing TIRT Technology Service Co.,Ltd Shenzhen

Address: 104 Building C, Xinmingsheng Industrial Park No.132, Zhangge Old Village East Zone, Zhangge Community, Fucheng Street, Longhua District, Shenzhen, Guangdong, P. R. China

CNAS Registration Number: CNAS L14158

A2LA Registration Number: 6049.01

FCC Designation Number: CN1366

Test Firm Registration Number: 820690

Telephone: +86-0755-27087573

2.8. Measurement Uncertainty

2.9. Test Equipment List

3. Spurious Emission

3.1. Test Limits

All the emissions appearing within 15.205 restricted frequency bands shall not exceed the limits shown in 15.209, all the other emissions shall be at least 20dB below the fundamental emissions, or comply with 15.209 limits.

15.205 Restricted frequency band

15.209 Limit

Note 1: The peak limit is 20 dB higher than the average limit

Note 2: Peak limit applies (AVG limit + 20 dB) as well as RSS-247 Section 5.5

3.2. Test Procedure

The measuring distance of 3m shall be used for measurements at frequency up to 1GHz and above 1GHz. The EUT was placed on a rotating 0.8 m high above ground for below 1GHz and 1.5m high for above1GHz testing, the table was rotated 360 degrees to determine the position of the highest radiation. The Test antenna shall vary between 1m and 4m, both Horizontal and Vertical antenna are set to make measurement. The initial step in collecting radiated emission data is a spectrum analyzer Peak detector mode pre-scanning the measurement frequency range. Significant Peaks are then marked, and then Quasi Peak Detector mode pre-measured. If Peak value comply with QP limit below 1GHz, the EUT deemed to comply with QP limit. But the Peak value and average value both need to comply with applicable limit above 1GHz. For the actual test configuration, please see the test setup photo.

3.3. Test Setup

Below 30MHz Test Setup: Shows the EUT on a table 0.8m high, 3m distance to a rotating RX Antenna (1m high), connected to a Spectrum Analyzer/Receiver. A metal full soldered ground plane is present.

Above 30MHz Test Setup: Shows the EUT on a table 1.5m high, 3m distance to an Antenna feed point (1-4m high), connected to a Spectrum Analyzer/Receiver. A metal full soldered ground plane is present.

3.4. Test Results

Test Condition: Continual Transmitting in maximum power.

We have scanned the EUT from 9kHz up to the 10th harmonic of the fundamental. Detailed information please see the following page.

From 9KHz to 30MHz: Conclusion: PASS

Note: 1. The amplitude of spurious emissions which are attenuated by more than 20dB below the permissible value has no need to be reported. 2. Only show the test data of the worst Channel in this report.

Radiated Emission Results (30MHz - 1000MHz)

Vertical:

Horizontal:

Remark: All modes have been tested, and only worst data of B mode, Channel 2412MHz was listed in this report.

Radiated Emission Results (1GHz - 25GHz)

The following tables detail the radiated emission measurements for IEEE 802.11b mode, covering Low, Mid, and High channels for both Vertical (V) and Horizontal (H) polarizations. Results are presented as Peak (PK) and Average (AV) measurements.

Test Mode: IEEE 802.11b TX Low

Test Mode: IEEE 802.11b TX Mid

Test Mode: IEEE 802.11b TX High

Note: 1. Result = Read level + Antenna factor + cable loss - Amp factor. 2. All the other emissions not reported were too low to read and deemed to comply with FCC limit. Note: All modes and channels have been tested and only the IEEE 802.11b TX mode with the worst data is listed.

Conducted RF Spurious Emission Plots

The following spectral plots illustrate the conducted RF spurious emissions for various test modes and channels. The plots show the measured signal level against frequency, with limit lines indicated.

11B_Ant1_2412_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11b mode at channel 2412 MHz.

11B_Ant1_2412_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11b mode at channel 2412 MHz.

11B_Ant1_2437_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11b mode at channel 2437 MHz.

11B_Ant1_2437_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11b mode at channel 2437 MHz.

11B_Ant1_2462_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11b mode at channel 2462 MHz.

11B_Ant1_2462_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11b mode at channel 2462 MHz.

11G_Ant1_2412_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11g mode at channel 2412 MHz.

11G_Ant1_2412_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11g mode at channel 2412 MHz.

11G_Ant1_2437_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11g mode at channel 2437 MHz.

11G_Ant1_2437_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11g mode at channel 2437 MHz.

11G_Ant1_2462_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11g mode at channel 2462 MHz.

11G_Ant1_2462_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11g mode at channel 2462 MHz.

11N20SISO_Ant1_2412_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11n (20MHz) mode at channel 2412 MHz.

11N20SISO_Ant1_2412_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11n (20MHz) mode at channel 2412 MHz.

11N20SISO_Ant1_2437_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11n (20MHz) mode at channel 2437 MHz.

11N20SISO_Ant1_2437_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11n (20MHz) mode at channel 2437 MHz.

11N20SISO_Ant1_2462_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11n (20MHz) mode at channel 2462 MHz.

11N20SISO_Ant1_2462_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11n (20MHz) mode at channel 2462 MHz.

11N40SISO_Ant1_2422_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11n (40MHz) mode at channel 2422 MHz.

11N40SISO_Ant1_2422_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11n (40MHz) mode at channel 2422 MHz.

11N40SISO_Ant1_2437_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11n (40MHz) mode at channel 2437 MHz.

11N40SISO_Ant1_2437_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11n (40MHz) mode at channel 2437 MHz.

11N40SISO_Ant1_2452_30~1000: Spectrum plot showing conducted emissions from 30 MHz to 1 GHz for 802.11n (40MHz) mode at channel 2452 MHz.

11N40SISO_Ant1_2452_1000~26500: Spectrum plot showing conducted emissions from 1 GHz to 26.5 GHz for 802.11n (40MHz) mode at channel 2452 MHz.

4. Power Line Conducted Emission

4.1. Test Limits

Notes: 1. *Decreasing linearly with logarithm of frequency. 2. The lower limit shall apply at the transition frequencies. 3. The limit decreases in line with the logarithm of the frequency in the range of 0.15 to 0.50 MHz.

4.2. Test Procedure

The EUT is put on the plane 0.8m high above the ground by insulating support and is connected to the power mains through a line impedance stabilization network (L.I.S.N.). This provides a 50ohm coupling impedance for the EUT system. Please refer the block diagram of the test setup and photographs. Both sides of AC lines are checked to find out the maximum conducted emission. In order to find the maximum emission levels, the relative positions of equipment and all of the interface cables shall be changed according to ANSI C63.10:2013 on Conducted Emission Measurement. The bandwidth of test receiver is set at 9 kHz.

4.3. Test Setup

Power Line Conducted Emission Test Setup: Shows the EUT connected to a LISN, which is connected to an EMI receiver. A vertical reference plane and a reference ground plane are indicated. The setup is 0.8m high.

4.4. Test Results

Conclusion: PASS. (See below detailed test data)

Note: If peak Result comply with AV limit, QP and AV Result is deemed to comply with AV limit.

Conducted Emission Results (Line)

Conducted Emission Results (Neutral)

Note: All modes and channels have been tested and only the B mode 2412MHz mode with the worst data is listed.

5. Conducted Maximum Output Power

5.1. Test limits

Please refer RSS-247 & FCC PART 15: 15.247. Regulation 15.247(b) The limit of Maximum Peak Output Power Measurement is 1 W(30dBm)

5.2. Test Procedure

Details see the KDB558074 D01 Meas Guidance v05r02

5.2.1 Place the EUT on the table and set it in transmitting mode.

5.2.2 Connected the EUT's antenna port to Spectrum Analyzer.

5.2.3 Measure out each mode and each bands peak output power of EUT.

Note: The cable loss was offset into measure device as amplitude offset.

5.3. Test Setup

A diagram shows the EUT connected directly to a Spectrum Analyzer via its antenna port.

5.4. Test Results

Conclusion: PASS

Detailed information please see the following page.