FCC Part 15.249 Test Report

General Information

Product Description for Equipment Under Test (EUT)

All measurement and test data in this report was gathered from production sample serial number: 20180122007. (Assigned by BACL, Kunshan). The EUT was received on 2018-01-22.

Objective

This type approval report is prepared on behalf of OKIN Refined Electric Technology Co., Ltd. in accordance with Part 2-Subpart J, and Part 15-Subparts A and C of the Federal Communication Commissions rules. The tests were performed in order to determine compliance with FCC Part 15, Subpart C, and section 15.203, 15.205, 15.207, 15.209 and 15.249 rules.

Related Submittal(s)/Grant(s)

FCC Part 15.249 DXX grant with FCC ID: WKZRF365A.

Test Methodology

All measurements contained in this report were conducted with ANSI C63.10-2013, American National Standard of Procedures for Compliance Testing of Unlicensed Wireless Devices. All radiated and conducted emissions measurement was performed at Bay Area Compliance Lab Corp. (Kunshan). The radiated testing was performed at an antenna-to-EUT distance of 3 meters.

Measurement Uncertainty

Test Facility

The test site used by Bay Area Compliance Laboratories Corp. (Kunshan) to collect test data is located on the No.248 Chenghu Road, Kunshan, Jiangsu province, China. Bay Area Compliance Laboratories Corp. (Kunshan) Lab is accredited to ISO/IEC 17025 by A2LA (Lab code: 4323.01) and the FCC designation No. CN1185 under the FCC KDB 974614 D01. The facility also complies with the radiated and AC line conducted test site criteria set forth in ANSI C63.4-2014.

System Test Configuration

Justification

Channel list:

EUT was tested with channel 1, 40 and 78.

EUT Exercise Software

No software was used during the test.

Support Equipment List and Details

External I/O Cable

Block Diagram of Test Setup

For Conducted Emissions:

The test setup for conducted emissions involves the Equipment Under Test (EUT), a Power Down Box, and an Adapter, all placed on a non-conductive table 80cm above the ground plane. A Line Impedance Stabilization Network (LISN) is connected to the adapter, and the LISN is connected to the AC source. The table measures 1.5 meters in width.

For Radiated Emissions (Below 1GHz):

The test setup for radiated emissions below 1 GHz features a turntable with a 2m diameter, supporting the EUT, Power Down Box, Adapter, and support units on a non-conductive table 80cm above the ground plane. An antenna tower, with an antenna height adjustable from 1m to 4m, is positioned at a distance of 3m from the EUT. A test receiver is also present. The setup is within a 1.5 meter measurement area.

For Radiated Emissions (Above 1GHz):

The test setup for radiated emissions above 1 GHz is similar to the setup for below 1 GHz, but the non-conductive table is raised to 150cm above the ground plane. The turntable diameter is 2m, the antenna tower is 1-4m adjustable, and the measurement distance is 3m. A test receiver is also part of the setup.

Summary of Test Results

Test Equipment List

* Statement of Traceability: Bay Area Compliance Laboratories Corp. (Kunshan) attests that all calibrations have been performed in accordance to requirements that traceable to National Primary Standards and International System of Units (SI).

FCC §15.203 - Antenna Requirement

Applicable Standard

For intentional device, according to §15.203, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used.

Antenna Connector Construction

The EUT has a PCB antenna and antenna gain is 0 dBi, which was permanently attached, fulfill the requirement of this section, please refer to the EUT photos.

Result: Compliant.

FCC §15.207 (a) – AC Line Conducted Emissions

Applicable Standard

FCC§15.207

EUT Setup

The setup of EUT is according with per ANSI C63.10-2013 measurement procedure. The specification used was with the FCC Part 15.207 limits. The spacing between the peripherals was 10 cm.

EMI Test Receiver Setup

The EMI test receiver was set to investigate the spectrum from 150 kHz to 30 MHz. During the conducted emission test, the EMI test receiver was set with the following configurations:

Test Procedure

During the conducted emission test, the adapter was connected to the outlet of the LISN. Maximizing procedure was performed on the six (6) highest emissions of the EUT. All data was recorded in the Quasi-peak and average detection mode.

Corrected Factor & Margin Calculation

The Corrected factor is calculated by adding LISN VDF (Voltage Division Factor), Cable Loss and Transient Limiter Attenuation. The basic equation is as follows: Corrected Factor = LISN VDF + Cable Loss + Transient Limiter Attenuation. The "Margin" column of the following data tables indicates the degree of compliance with the applicable limit. For example, a margin of 7 dB means the emission is 7 dB below the limit. The equation for margin calculation is as follows: Margin = Limit -Reading

Test Results Summary

According to the recorded data in following table, the EUT complied with the FCC Part 15.207.

Test Data

Environmental Conditions

The testing was performed by Max Min on 2018-03-06. EUT operation mode: Transmitting in high channel (worst case)

AC 120V/60 Hz, Line

The plot shows the conducted emissions for AC 120V/60 Hz on the Line. The horizontal axis represents frequency in MHz, and the vertical axis represents the signal level in dBμV. Red lines indicate the Quasi-Peak Limit and Average Limit. Markers indicate specific frequency points, readings, and calculated margins. The test results indicate compliance.

AC 120V/60 Hz, Neutral

The plot shows the conducted emissions for AC 120V/60 Hz on the Neutral line. The horizontal axis represents frequency in MHz, and the vertical axis represents the signal level in dBμV. Red lines indicate the Quasi-Peak Limit and Average Limit. Markers indicate specific frequency points, readings, and calculated margins. The test results indicate compliance.

Note: 1) Corrected Factor = LISN VDF + Cable Loss + Transient Limiter Attenuation 2) Margin = Limit – Reading

FCC §15.205, §15.209&§15.249 - Radiated Emissions & Out of Band Emission

Applicable Standard

As per FCC§15.249 (a), except as provided in paragraph (b) of this section, the field strength of emissions from intentional radiators operated within these frequency bands shall comply with the following:

As per FCC§15.249 (c), Field strength limits are specified at a distance of 3 meters.

(d) Emissions radiated outside of the specified frequency bands, except for harmonics, shall be attenuated by at least 50 dB below the level of the fundamental or to the general radiated emission limits in §15.209, whichever is the lesser attenuation.

EUT Setup

Below 1 GHz:

The test setup for radiated emissions below 1 GHz features a turntable with a 2m diameter, supporting the EUT, Power Down Box, Adapter, and support units on a non-conductive table 80cm above the ground plane. An antenna tower, with an antenna height adjustable from 1m to 4m, is positioned at a distance of 3m from the EUT. A test receiver is also present. The setup is within a 1.5 meter measurement area.

Above 1 GHz:

The test setup for radiated emissions above 1 GHz is similar to the setup for below 1 GHz, but the non-conductive table is raised to 150cm above the ground plane. The turntable diameter is 2m, the antenna tower is 1-4m adjustable, and the measurement distance is 3m. A test receiver is also part of the setup.

Test Equipment Setup

The system was investigated from 30 MHz to 25 GHz. During the radiated emission test, the EMI test receiver was set with the following configurations:

Test Procedure

Maximizing procedure was performed on the highest emissions to ensure that the EUT complied with all installation combinations. All data was recorded in the Quasi-peak detection mode from 30MHz to 1GHz, Peak and average detection mode above 1 GHz.

Corrected Amplitude & Margin Calculation

The Corrected Amplitude is calculated by adding the Antenna Factor and Cable Loss, and subtracting the Amplifier Gain from the Meter Reading. The basic equation is as follows: Corrected Amplitude = Meter Reading + Antenna Factor + Cable Loss - Amplifier Gain. The "Margin" column of the following data tables indicates the degree of compliance with the applicable limit. For example, a margin of 7dB means the emission is 7dB below the limit. The equation for margin calculation is as follows: Margin = Limit –Corrected Amplitude

Test Results Summary

According to the data in the following table, the EUT complied with the FCC Part 15.209 &15.205 & 15.249.

Test Data

Environmental Conditions

The testing was performed by Max Min on 2018-03-07. Test Mode: Transmitting

Spurious Emission Test: 30MHz-1GHz

The plot displays the spectrum analyzer readings for spurious emissions between 30 MHz and 1 GHz. The horizontal axis represents frequency in Hz, and the vertical axis represents the signal level in dBμV/m. The test was performed pre-scan with low, middle, and high channels, and the worst-case high channel in the X-axis orientation was recorded. Markers indicate specific frequency points, corrected amplitudes, and calculated margins. The test results indicate compliance.

1GHz-18GHz

The plot displays the spectrum analyzer readings for emissions between 1 GHz and 18 GHz. The horizontal axis represents frequency in Hz, and the vertical axis represents the signal level in dBμV/m. The test was performed with a 2.4-2.4835GHz band reject filter. The worst-case X-axis orientation was recorded. The plot includes a 'Fundamental' marker. Two traces are shown: MaxPeak and Average. The calculation notes for Corrected Factor and Corrected Amplitude are provided. The test was conducted on the Low Channel: 2403MHz.

Middle Channel: 2442MHz

The plot displays the spectrum analyzer readings for the middle channel (2442MHz) between 1 GHz and 18 GHz. The horizontal axis represents frequency in Hz, and the vertical axis represents the signal level in dBμV/m. Two traces are shown: MaxPeak and Average. The plot includes a 'Fundamental' marker. The test was conducted in X-axis orientation.

High Channel: 2480MHz

The plot displays the spectrum analyzer readings for the high channel (2480MHz) between 1 GHz and 18 GHz. The horizontal axis represents frequency in Hz, and the vertical axis represents the signal level in dBμV/m. Two traces are shown: MaxPeak and Average. The test was conducted in X-axis orientation.

18GHz-25GHz

The plots display the spectrum analyzer readings for radiated emissions between 18 GHz and 25 GHz. The horizontal axis represents frequency in GHz, and the vertical axis represents the signal level in dBμV/m. Two plots are shown: one for Horizontal polarization and one for Vertical polarization. Each plot shows a peak detection trace (marked '1 PK MAXH') and an average detection trace (marked '2 AV MAXH'). Red lines indicate the limits: D1 for the 74 dBμV/m limit and D2 for the 54 dBμV/m limit. Markers indicate specific frequency points and their corresponding signal levels. The test was conducted pre-scan with low, middle, and high channels, and the worst-case high channel in the X-axis orientation was recorded. The date of the test was March 7, 2018.

FCC §15.215(c) – 20 dB Bandwidth Testing

Applicable Standard

Intentional radiators operating under the alternative provisions to the general emission limits, as contained in §15.217 through 15.257 and in Subpart E of this part, must be designed to ensure that the 20 dB bandwidth of the emission, or whatever bandwidth may otherwise be specified in the specific rule section under which the equipment operates, is contained within the frequency band designated in the rule section under which the equipment is operated.

Test Procedure

1. Check the calibration of the measuring instrument using either an internal calibrator or a known signal from an external generator.
2. Position the EUT on the test table without connection to measurement instrument. Turn on the EUT. Then set it to any one convenient frequency within its operating range. Set a reference level on the measuring instrument equal to the highest peak value.
3. Measure the frequency difference of two frequencies that were attenuated 20 dB from the reference level. Record the frequency difference as the emission bandwidth.
4. Repeat above procedures until all frequencies measured were complete.

Test Data

Environmental Conditions

The testing was performed by Max Min on 2018-01-29. Test Result: Compliant.

Test Mode: Transmitting

20 dB Bandwidth:

Low Channel

The plot shows the 20 dB bandwidth measurement for the Low Channel (2403MHz). The center frequency is 2.403 GHz, with a span of 3 MHz. The plot displays the signal level in dBm. Markers indicate the peak level, the reference level (D1), and the -20 dB level (D2). The measured bandwidth is indicated by A1 [T1].

Middle Channel

The plot shows the 20 dB bandwidth measurement for the Middle Channel (2442MHz). The center frequency is 2.442 GHz, with a span of 3 MHz. The plot displays the signal level in dBm. Markers indicate the peak level, the reference level (D1), and the -20 dB level (D2). The measured bandwidth is indicated by A1 [T1].

High Channel

The plot shows the 20 dB bandwidth measurement for the High Channel (2480MHz). The center frequency is 2.48 GHz, with a span of 3 MHz. The plot displays the signal level in dBm. Markers indicate the peak level, the reference level (D1), and the -20 dB level (D2). The measured bandwidth is indicated by A1 [T1].