TEST REPORT

1. VERSION

2. TEST SUMMARY

The Product has been tested according to the following specifications:

Remark: Test according to ANSI C63.4-2014 & ANSI C63.10-2013.

3. MEASUREMENT UNCERTAINTY

Where relevant, the following measurement uncertainty levels have been estimated for tests performed on the Product as specified in CISPR 16-4-2. This uncertainty represents an expanded uncertainty expressed at approximately the 95% confidence level using a coverage factor of k=2.

4. PRODUCT INFORMATION AND TEST SETUP

4.1 Product Information

• Model(s): LC-B45
• Model Description: N/A
• Bluetooth Version: Bluetooth 5.0
• Hardware Version: V1.1
• Software Version: V5.0
• Operation Frequency: Bluetooth: 2402-2480MHz
• Max. RF output power: Bluetooth: -0.553dBm
• Type of Modulation: Bluetooth: GFSK
• Antenna installation: Chip Antenna
• Antenna Gain: Bluetooth:2.25dBi
• Ratings: DC 5V charging from adapter cell of earphone: battery DC 3.7V

4.2 Test Setup Configuration

See test photographs attached in EUT TEST SETUP PHOTOGRAPHS for the actual connections between Product and support equipment.

4.3 Support Equipment

Notes:

• 1. All the equipment/cables were placed in the worst-case configuration to maximize the emission during the test.
• 2. Grounding was established in accordance with the manufacturer's requirements and conditions for the intended use.

4.4 Channel List

4.5 Test Mode

All test mode(s) and condition(s) mentioned were considered and evaluated respectively by performing full tests, the worst data were recorded and reported.

4.6 Test Environment

• Humidity(%): 55
• Atmospheric Pressure(kPa): 101.1
• Normal Voltage(DC): 3.7V
• Normal Temperature(°C): 25
• Low Temperature (°C): 0
• High Temperature(°C): 40

5. TEST FACILITY AND TEST INSTRUMENT USED

5.1 Test Facility

All measurement facilities used to collect the measurement data are located at Floor 1&2, Building A, No. 26 of Xinhe Road, Xinqiao Street, Baoan District, Shenzhen China. The site and apparatus are constructed in conformance with the requirements of ANSI C63.4 and CISPR 16-1-1 other equivalent standards.

5.2 Test Instrument Used

6. AC POWER LINE CONDUCTED EMISSION

6.1 Block Diagram Of Test Setup

The test setup includes a Shielding Room, the Equipment Under Test (EUT), Accessory Equipment (AE), a Test Receiver, and two Line Impedance Stabilization Networks (LISN1 and LISN2). The EUT is connected to LISN1, which is connected to the AC Main. The AE is connected to LISN2. Both LISNs are connected to the Test Receiver. A ground reference plane is utilized beneath the EUT and AE.

6.2 Limit

Note 1: The level decreases linearly with the logarithm of the frequency.

* Decreasing linearly with the logarithm of the frequency.

6.3 Test procedure

1. The mains terminal disturbance voltage test was conducted in a shielded room.
2. The EUT was connected to AC power source through a LISN 1 (Line Impedance Stabilization Network) which provides a 50/50µH + 5 linear impedance. The power cables of all other units of the EUT were connected to a second LISN 2, which was bonded to the ground reference plane in the same way as the LISN 1 for the unit being measured. A multiple socket outlet strip was used to connect multiple power cables to a single LISN provided the rating of the LISN was not exceeded.
3. The tabletop EUT was placed upon a non-metallic table 0.8m above the ground reference plane. And for floor-standing arrangement, the EUT was placed on the horizontal ground reference plane.
4. The test was performed with a vertical ground reference plane. The rear of the EUT shall be 0.4 m from the vertical ground reference plane. The vertical ground reference plane was bonded to the horizontal ground reference plane. The LISN 1 was placed 0.8 m from the boundary of the unit under test and bonded to a ground reference plane for LISNs mounted on top of the ground reference plane. This distance was between the closest points of the LISN 1 and the EUT. All other units of the EUT and associated equipment was at least 0.8 m from the LISN 2.
5. In order to find the maximum emission, the relative positions of equipment and all of the interface cables must be changed according to ANSI C63.10 on conducted measurement.
6. All modes were tested at AC 120V and 240V, only the worst result of AC 120V 60Hz was reported.
7. If a EUT received DC power from the USB Port of Notebook PC, the PC's adapter received AC120V/60Hz power through a Line Impedance Stabilization Network (LISN) which supplied power source and was grounded to the ground plane.

6.4 Test Result

Graphs show conducted emission levels for both Quasi-peak (QP) and Average (AVG) detectors. The green line represents the QP limit, and the red line represents the AVG limit. The blue trace shows the measured emission levels.

Remark: Factor = Cable loss + LISN factor, Margin = Measurement - Limit

7. RADIATED SPURIOUS EMISSION

7.1 Block Diagram Of Test Setup

Figure 1. Below 30MHz: The setup involves a Radio Test System, EUT, and an antenna. The EUT is placed on a table within a shielded room, connected to the antenna.

Figure 2. 30MHz to 1GHz: The setup includes a Radio Test System, EUT, and an antenna. The EUT is placed on a table within a shielded room, connected to the antenna. The test receiver is also part of the setup.

7.2 Limit

Spurious Emissions are subject to the following limits:

Note: 15.35(b), Unless otherwise specified, the limit on peak radio frequency emissions is 20dB above the maximum permitted average emission limit applicable to the equipment under test. This peak limit applies to the total peak emission level radiated by the device.

7.3 Test procedure

Below 1GHz test procedure:

• a. The EUT was placed on the top of a rotating table 0.8 meters above the ground at a 3 meter semi-anechoic chamber. The table was rotated 360 degrees to determine the position of the highest radiation.
• b. The EUT was set 3 meters away from the interference-receiving antenna, which was mounted on the top of a variable-height antenna tower.
• c. The antenna height is varied from one meter to four meters above the ground to determine the maximum value of the field strength. Both horizontal and vertical polarizations of the antenna are set to make the measurement.
• d. For each suspected emission, the EUT was arranged to its worst case and then the antenna was tuned to heights from 1 meter to 4 meters (for the test frequency of below 30MHz, the antenna was tuned to heights 1 meter) and the rota table table was turned from 0 degrees to 360 degrees to find the maximum reading.
• e. The test-receiver system was set to Peak Detect Function and Specified Bandwidth with Maximum Hold Mode.
• f. If the emission level of the EUT in peak mode was 10dB lower than the limit specified, then testing could be stopped and the peak values of the EUT would be reported. Otherwise the emissions that did not have 10dB margin would be re-tested one by one using peak, quasi-peak or average method as specified and then reported in a data sheet.

Above 1GHz test procedure:

• g. Different between above is the test site, change from Semi- Anechoic Chamber to fully Anechoic Chamber and change form table 0.8 meter to 1.5 meter( Above 18GHz the distance is 1 meter and table is 1.5 meter).
• h. Test the EUT in the lowest channel ,the middle channel ,the Highest channel
• j. Repeat above procedures until all frequencies measured was complete.
• j. Full battery is used during test

Receiver set:

7.4 Test Result

Below 1GHz Test Results: Antenna polarity: H

Graphs show emission levels for horizontal polarization. The green line indicates the limit, and the blue trace shows the measured emission levels.

Remark: Factor = Cable lose + Antenna factor - Pre-amplifier; Margin = Measurement - Limit

Antenna polarity: V

7.4 Test Result (Continued)

CH Low (2402MHz) Horizontal:

CH Low (2402MHz) Vertical:

CH Middle (2440MHz) Horizontal:

CH Middle (2440MHz) Vertical:

CH High (2480MHz) Horizontal:

CH High (2480MHz) Vertical:

Remark: All the other emissions not reported were too low to read and deemed to comply with FCC limit.

8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS

8.1 Block Diagram Of Test Setup

The test setup consists of a Radio Test System connected to the EUT.

8.2 Limit

In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in §15.205(a), must also comply with the radiated emission limits specified in §15.209(a) (see §15.205(c)).

8.3 Test procedure

1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum analyzer.
2. Set the spectrum analyzer:
   • Blow 30MHz: RBW = 100kHz, VBW = 300kHz, Sweep = auto
   • Detector function = peak, Trace = max hold
3. Above 30MHz:
   • RBW = 100KHz, VBW = 300KHz, Sweep = auto
   • Detector function = peak, Trace = max hold

8.4 Test Result

Graphs show BAND EDGE measurements for GFSK/LCH and GFSK/HCH.

Graphs show RF Conducted Spurious Emissions for GFSK/LCH, GFSK/MCH, GFSK/HCH.

9. COUDUCTED OUTPUT POWER

9.1 Block Diagram Of Test Setup

The test setup includes a Radio Test System connected to the EUT.

9.2 Limit

9.3 Test procedure

1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum.
2. Set the spectrum analyzer: RBW = 3MHz. VBW = 10MHz. Channel power measurement. Sweep = auto; Detector Function = RMS.
3. Keep the EUT in transmitting at lowest, middle and highest channel individually. Record the max value.

9.4 Test Result

Graphs show Conducted Output Power test results for GFSK Low channel, Mid channel, and High channel.

10. 6DB OCCUPIED BANDWIDTH

10.1 Block Diagram Of Test Setup

The test setup includes a Radio Test System connected to the EUT.

10.2 Limit

10.3 Test procedure

1. Rem1. Set RBW = 30 kHz.
2. Set the video bandwidth (VBW) 3 x RBW.
3. Detector = Peak.
4. Trace mode = max hold.
5. Sweep = auto couple.
6. Allow the trace to stabilize.
7. Measure the maximum width of the emission that is constrained by the frequencies associated with the two outermost amplitude points (upper and lower frequencies) that are attenuated by 6 dB relative to the maximum level measured in the fundamental emission.

10.4 Test Result

Note: All modes of operation were Pre-scan and the worst-case emissions are reported.

Graphs show 6dB Occupied Bandwidth test results for GFSK Low channel, Mid channel, and High channel.

11. POWER SPECTRAL DENSITY

11.1 Block Diagram Of Test Setup

The test setup includes a Radio Test System connected to the EUT.

11.2 Limit

11.3 Test procedure

1. Set analyzer center frequency to DTS channel center frequency.
2. Set the span to 1.5 times the DTS bandwidth.
3. Set the RBW to: 3 kHz RBW 100 kHz.
4. Set the VBW 3 x RBW.
5. Detector = RMS.
6. Sweep time = auto couple.
7. Trace mode = max hold.
8. Allow trace to fully stabilize.
9. Use the peak marker function to determine the maximum amplitude level within the RBW.
10. If measured value exceeds limit, reduce RBW (no less than 3 kHz) and repeat.

11.4 Test Result

Graphs show Power Spectral Density test results for GFSK/LCH, GFSK/MCH, GFSK/HCH.

12. ANTENNA REQUIREMENT

15.203 requirement:

An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator, the manufacturer may design the unit so that a broken antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited.

15.247(b) (4) requirement:

The conducted output power limit specified in paragraph (b) of this section is based on the use of antennas with directional gains that do not exceed 6 dBi. Except as shown in paragraph (c) of this section, if transmitting antennas of directional gain greater than 6 dBi are used, the conducted output power from the intentional radiator shall be reduced below the stated values in paragraphs (b)(1), (b)(2), and (b)(3) of this section, as appropriate, by the amount in dB that the directional gain of the antenna exceeds 6 dBi.

EUT Antenna:

The antenna is Chip antenna. The best case gain of the antenna is 2.25dBi.

13. EUT TEST SETUP PHOTOGRAPHS

Radiated Emissions

Below 1G: Photograph showing the test setup for radiated emissions below 1 GHz.

Above 1G: Photograph showing the test setup for radiated emissions above 1 GHz.

Conducted emission:

Photograph showing the conducted emission test setup.