FCC PART 15 SUBPART C TEST REPORT

1 Test Standards

The tests were performed according to the following standards:

• FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems operating within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz.
• ANSI C63.10-2013: American National Standard for Testing Unlicensed Wireless Devices.
• KDB558074 D01 V05r02: Guidance for Performing Compliance Measurements on Digital Transmission Systems (DTS) Operating Under §15.247.

2 Summary

2.1 General Remarks

Date of receipt of test sample: Jul. 22, 2024

Testing commenced on: Jul. 22, 2024

Testing concluded on: Jul. 25, 2024

2.2 Product Description

Product Description: Loshall Tag F08

Model/Type reference: Macaron

Power supply: DC 3V From battery

Hardware version: V1.0

Software version: V1.0

Testing sample ID: CTA240722008-1# (Engineer sample), CTA240722008-2# (Normal sample)

Bluetooth BLE:

• Supported type: Bluetooth low Energy
• Modulation: GFSK
• Operation frequency: 2402MHz to 2480MHz
• Channel number: 40
• Channel separation: 2 MHz
• Antenna type: Ceramic antenna
• Antenna gain: 2.25 dBi

2.3 Equipment Under Test

Power supply system utilised: DC 3V From battery

2.4 Short description of the Equipment under Test (EUT)

This is a Loshall Tag F08. For more details, refer to the user's manual of the EUT.

2.5 EUT operation mode

The Applicant provided communication tools software (Engineer mode) to control the EUT for staying in continuous transmitting (Duty Cycle more than 98%) and receiving mode for testing. Channels 00, 19, and 39 were selected for testing.

2.6 Block Diagram of Test Setup

A block diagram illustrates the test setup, showing the EUT connected to a DC 3V power source.

2.7 Related Submittal(s) / Grant (s)

This test report is intended for filing to comply with Section 15.247 of the FCC Part 15, Subpart C Rules.

2.8 Modifications

No modifications were implemented to meet testing criteria.

3 Test Environment

3.1 Address of the test laboratory

Shenzhen CTA Testing Technology Co., Ltd., Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao'an District, Shenzhen, China.

3.2 Test Facility

The test facility is recognized, certified, or accredited by the following organizations:

• FCC-Registration No.: 517856, Designation Number: CN1318. Shenzhen CTA Testing Technology Co., Ltd. is listed on the US Federal Communications Commission list of test facilities.
• A2LA-Lab Cert. No.: 6534.01. Shenzhen CTA Testing Technology Co., Ltd. is listed by the American Association for Laboratory Accreditation.

The 3m-Semi anechoic test site fulfills CISPR 16-1-4 according to ANSI C63.10 and CISPR 16-1-4:2010.

3.3 Environmental conditions

Environmental conditions during measurements:

• Radiated Emission: Temperature: 23°C, Humidity: 44%, Atmospheric pressure: 950-1050mbar.
• AC Main Conducted testing: Temperature: 24°C, Humidity: 47%, Atmospheric pressure: 950-1050mbar.
• Conducted testing: Temperature: 24°C, Humidity: 46%, Atmospheric pressure: 950-1050mbar.

3.4 Summary of measurement results

Remark: 1. The measurement uncertainty is not included in the test result. 2. All test modes were tested, and the worst case is recorded in the report.

3.5 Statement of the measurement uncertainty

The data and results referenced in this document are true and accurate. The measurement uncertainty was calculated for all measurements according to TR-100028-01 and TR-100028-02, and is documented in the Shenzhen CTA Testing Technology Co., Ltd. quality system acc. to DIN EN ISO/IEC 17025. The manufacturer is solely responsible for continued compliance.

Best measurement capabilities:

• Radiated Emission (30~1000MHz): ±4.06 dB
• Radiated Emission (1~18GHz): ±5.14 dB
• Radiated Emission (18-40GHz): ±5.38 dB
• Conducted Disturbance (0.15~30MHz): ±2.14 dB
• Output Peak power (30MHz~18GHz): ±0.55 dB
• Power spectral density: ±0.57 dB
• Spectrum bandwidth: ±1.1%
• Radiated spurious emission (30MHz-1GHz): ±4.10 dB
• Radiated spurious emission (1GHz-18GHz): ±4.32 dB
• Radiated spurious emission (18GHz-40GHz): ±5.54 dB

3.6 Equipments Used during the Test

A table lists the test equipment used, including manufacturer, model number, equipment number, calibration date, and due date. This includes LISNs, EMI Test Receivers, Spectrum Analyzers, Signal Generators, Communication Testers, Antennas, Amplifiers, Filters, Power Sensors, and Test Software from brands like R&S, Agilent, Chigo, Schwarzbeck, Zhinan, Beijing Hangwei Dayang, Taiwan Chengyi, NARDA, XingBo, and Tonscend.

4 Test Conditions and Results

4.1 AC Power Conducted Emission

Test Configuration: A diagram shows the EUT connected to a LISN, which is connected to an EMI receiver. A vertical reference plane and ground plane are indicated.

Test Procedure: The EUT was set up on a 0.8m high table. AC power was supplied via a LISN. Emissions were measured on each current carrying line using a spectrum analyzer/receiver. Scans were performed for Line 1 and Line 2, with measurements taken from 150 KHz to 30MHz.

AC Power Conducted Emission Limit:

*Decreases with the logarithm of the frequency.

Test Results: The EUT is powered by Battery, so this test item is not applicable.

4.2 Radiated Emissions and Band Edge

Test Configuration: Diagrams illustrate test setups for frequency ranges 9 KHz - 30MHz (using a loop antenna), 30MHz – 1000MHz (using an ultra-broadband antenna), and above 1GHz-25GHz (using a horn antenna). Test distances are specified (3m for lower frequencies, 1m to 4m for higher frequencies).

Test Procedure: The EUT was placed on a turntable at heights of 0.8m or 1.5m above the ground plane. The receiving antenna height was varied from 1m to 4m, and the turntable was rotated from 0° to 360° to find maximum emissions. Polarization was checked (horizontal and vertical). Measurements covered frequencies from 9 KHz to 25GHz.

Field Strength Calculation: Field strength (FS) is calculated as FS = RA + AF + CL - AG, where RA is Reading Amplitude, AF is Antenna Factor, CL is Cable Attenuation Factor, and AG is Amplifier Gain.

Radiation Limit: According to §15.209(a), field strength limits for intentional radiators at 3 meters are provided. According to §15.247(d), out-of-band emissions must be at least 20dB below the in-band power level within a 100kHz bandwidth.

Test Results: Tests were performed in X, Y, Z positions, with X being the worst case. BLE 1Mpbs mode was tested at Low, Middle, and High channels. Radiated emission tests from 9 KHz to the 10th harmonic were verified, with no emissions found above system noise floor in the 9 KHz to 30MHz range.

Horizontal Radiated Emissions (30MHz-1GHz): A graph shows measured levels against limits. A table lists specific frequencies (e.g., 107.963 MHz, 151.856 MHz, etc.), readings, factors, limits, margins, height, angle, and polarity. All tested points were within the limits.

Vertical Radiated Emissions (30MHz-1GHz): Similar to horizontal, a graph and table show that all tested points were within the limits.

Radiated Emissions (1GHz to 25GHz): Detailed tables present emission levels, limits, margins, raw values, antenna factors, cable factors, and pre-amplifier corrections for GFSK modulation at 2402MHz, 2440MHz, and 2480MHz, for both horizontal and vertical polarities. All tested emissions were within the specified limits.

Band Edges Test (Radiated): Tables show emission levels, limits, and margins for band edge measurements at 2390.00 MHz and 2483.50 MHz for GFSK modulation at 2402MHz and 2480MHz, for both horizontal and vertical polarities. All tested emissions were within the limits.

4.3 Maximum Peak Output Power

Limit: The Maximum Peak Output Power Measurement is 30dBm.

Test Procedure: The antenna was removed from the EUT, and a low-loss RF cable connected the antenna port to a power sensor.

Test Results: For GFSK 1Mbps mode, output powers measured were -2.08 dBm (Channel 00), -1.68 dBm (Channel 19), and -0.93 dBm (Channel 39). All results were below the 30dBm limit and passed.

4.4 Power Spectral Density

Limit: For digitally modulated systems, the power spectral density shall not be greater than 8 dBm in any 3 kHz band during continuous transmission.

Test Procedure: The procedure involves setting RBW ≥ 3 kHz, VBW ≥ 3× RBW, and adjusting the span and detector settings. Peak marker function is used to determine the maximum power level.

Test Configuration: EUT connected to a Spectrum Analyzer.

Test Results: Power Spectral Density values were -17.95 dBm/3KHz (Channel 00), -17.68 dBm/3KHz (Channel 19), and -16.68 dBm/3KHz (Channel 39). All values are below the 8 dBm limit and passed.

Test Plots: Spectral plots are provided for GFSK 1Mbps at CH00, CH19, and CH39, showing the power spectral density measurements.

4.5 6dB Bandwidth

Limit: For digital modulation systems, the minimum 6 dB bandwidth shall be at least 500 kHz.

Test Procedure: The transmitter output was connected to a spectrum analyzer with 100 KHz RBW and 300 KHz VBW. The 6dB bandwidth is defined as the total spectrum where power is higher than peak power minus 6dB.

Test Configuration: EUT connected to a Spectrum Analyzer.

Test Results: The 6dB bandwidths measured were 0.624 MHz (Channel 00), 0.632 MHz (Channel 19), and 0.644 MHz (Channel 39). All values exceed the 500 kHz limit and passed.

Test Plots: Spectral plots are provided for GFSK 1Mbps at CH00, CH19, and CH39, showing the 6dB bandwidth measurements.

4.6 Out-of-band Emissions

Limit: In any 100 kHz bandwidth outside the operating frequency band, radio frequency power shall be at least 20 dB below the in-band power level. If RMS averaging is used, the attenuation requirement is 30 dB. Attenuation below general limits specified in §15.209(a) is not required.

Test Procedure: The transmitter output was connected to a spectrum analyzer (RBW=100 kHz, VBW= 300 kHz, peak detector, max hold) to measure in-band reference level, bandedge, and out-of-band emissions.

Test Configuration: EUT connected to a Spectrum Analyzer.

Test Results: Measurement frequency range is from 30MHz to the 10th harmonic. Lowest, middle, and highest channels were tested to verify spurious emissions and bandedge data. Test plots are provided for GFSK 1Mbps at CH00, CH19, and CH39, showing measurements for reference, 30MHz-1G, and 1G-26.5G ranges, as well as band-edge measurements.

4.7 Antenna Requirement

Standard Applicable: According to FCC 47 CFR Section 15.203, intentional radiators must use the antenna furnished by the responsible party. Permanently attached antennas or unique coupling methods are permitted, but standard antenna jacks or connectors are prohibited.

FCC CFR Title 47 Part 15 Subpart C Section 15.247(c)(1)(I): For fixed point-to-point operations in the 2400-2483.5 MHz band, directional gain greater than 6dBi requires a reduction in output power by 1 dB for every 3 dB exceeding 6dBi.

Antenna Connected Construction: The antenna gain is 2.25 dBi. The antenna gain was provided by the customer; Shenzhen CTA Testing Technology Co., Ltd. assumes no responsibility for the accuracy of this data.

Test Setup Photos of the EUT

Photographs show the EUT set up in the testing environment, including the anechoic chamber setup for radiated emissions testing.

5 Photos of the EUT

Multiple photographs display the Loshall Tag F08 device (Model: Macaron) from various angles, including close-ups of its physical appearance and internal components. A ruler is included in some images for scale.