Test report

FCC ID: 2AF6B-RAK831

Test Report

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FCCID_3859104

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

TABLE OF CONTENTS

GENERAL INFORMATION .......................................................................................................................................4
PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) .....................................................................................4
OBJECTIVE ...................................................................................................................................................................4
RELATED SUBMITTAL(S)/GRANT(S) .............................................................................................................................4
TEST METHODOLOGY ..................................................................................................................................................4
MEASUREMENT UNCERTAINTY ....................................................................................................................................4
TEST FACILITY .............................................................................................................................................................5
SYSTEM TEST CONFIGURATION ..........................................................................................................................6
DESCRIPTION OF TEST CONFIGURATION ......................................................................................................................6
EQUIPMENT MODIFICATIONS .......................................................................................................................................6
EUT EXERCISE SOFTWARE ..........................................................................................................................................6
DUTY CYCLE ................................................................................................................................................................6
LOCAL SUPPORT EQUIPMENT LIST AND DETAILS ........................................................................................................7
EXTERNAL I/O CABLE..................................................................................................................................................7
BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................7
SUMMARY OF TEST RESULTS ...............................................................................................................................8

TEST EQUIPMENT LIST ...........................................................................................................................................9
FCC §15.247 (I) & §1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) ................................10
APPLICABLE STANDARD ............................................................................................................................................10
FCC §15.203 - ANTENNA REQUIREMENT...........................................................................................................11
APPLICABLE STANDARD ............................................................................................................................................11
ANTENNA CONNECTOR CONSTRUCTION ....................................................................................................................11
FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS .....................................................................................12
APPLICABLE STANDARD ............................................................................................................................................12
EUT SETUP ................................................................................................................................................................12
EMI TEST RECEIVER SETUP .......................................................................................................................................12
TEST PROCEDURE ......................................................................................................................................................12
CORRECTED FACTOR & MARGIN CALCULATION .......................................................................................................13
TEST RESULTS SUMMARY ..........................................................................................................................................13
TEST DATA ................................................................................................................................................................13
FCC §15.209, §15.205 & §15.247(d) - SPURIOUS EMISSIONS.............................................................................16
APPLICABLE STANDARD ............................................................................................................................................16
EUT SETUP ................................................................................................................................................................16
EMI TEST RECEIVER & SPECTRUM ANALYZER SETUP ..............................................................................................17
TEST PROCEDURE ......................................................................................................................................................17
CORRECTED AMPLITUDE & MARGIN CALCULATION .................................................................................................17
TEST RESULTS SUMMARY ..........................................................................................................................................17
TEST DATA ................................................................................................................................................................18
FCC §15.247(a) (2) – 6 dB EMISSION BANDWIDTH ............................................................................................22
APPLICABLE STANDARD ............................................................................................................................................22
TEST PROCEDURE ......................................................................................................................................................22
TEST DATA ................................................................................................................................................................22

FCC Part 15.247 Page 2 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

FCC §15.247(b) (3) - MAXIMUM CONDUCTED OUTPUT POWER ..................................................................25
APPLICABLE STANDARD ............................................................................................................................................25
TEST PROCEDURE ......................................................................................................................................................25
TEST DATA ................................................................................................................................................................25
FCC §15.247(d) – 100 kHz BANDWIDTH OF FREQUENCY BAND EDGE .......................................................26
APPLICABLE STANDARD ............................................................................................................................................26
TEST PROCEDURE ......................................................................................................................................................26
TEST DATA ................................................................................................................................................................26
FCC §15.247(e) - POWER SPECTRAL DENSITY .................................................................................................28
APPLICABLE STANDARD ............................................................................................................................................28
TEST PROCEDURE ......................................................................................................................................................28
TEST DATA ................................................................................................................................................................28

FCC Part 15.247 Page 3 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

GENERAL INFORMATION
Product Description for Equipment under Test (EUT)

The Shenzhen Rakwireless Technology Co., Ltd.’s product, model number: RAK831
(FCC ID: 2AF6B-RAK831) or the "EUT" in this report was a LoRa WAN GATEWAY which was measured
approximately: 80 mm (L) * 50 mm (W) * 5.0 mm (H), rated with input voltage: DC 5.0V.

* All measurement and test data in this report was gathered from production sample serial number: 180322002
(Assigned by BACL, Shenzhen). The EUT supplied by the applicant was received on 2018-03-22.

Objective
This report is prepared on behalf of Shenzhen Rakwireless Technology Co., Ltd. in accordance with Part 2-
Subpart J, Part 15-Subparts A and C of the Federal Communication Commission’s 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 15.247 rules.

Related Submittal(s)/Grant(s)
No Related Submittal.

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 emissions measurement was performed at Bay Area Compliance Laboratories Corp. (Shenzhen). The
radiated testing was performed at an antenna-to-EUT distance of 3 meters.

Measurement Uncertainty

Parameter uncertainty
Occupied Channel Bandwidth ±5%
RF Output Power with Power meter ±0.5dB
RF conducted test with spectrum ±1.5dB
AC Power Lines Conducted Emissions ±1.95dB
All emissions, radiated ±4.88dB
Temperature ±3℃
Humidity ±6%
Supply voltages ±0.4%

FCC Part 15.247 Page 4 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Test Facility
The test site used by Bay Area Compliance Laboratories Corp. (Shenzhen) to collect test data is located on
the 6/F., West Wing, Third Phase of Wanli Industrial Building, Shihua Road, Futian Free Trade Zone,
Shenzhen, Guangdong, China.

The test site has been approved by the FCC under the KDB 974614 D01 and is listed in the FCC Public
Access Link (PAL) database, FCC Registration No. : 342867, the FCC Designation No. : CN1221.

The test site has been registered with ISED Canada under ISED Canada Registration Number 3062B.

FCC Part 15.247 Page 5 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

SYSTEM TEST CONFIGURATION
Description of Test Configuration
The system was configured for testing in testing mode, which was provided by manufacturer.
For LoRa mode, Detailed Frequency as below:

Frequency Frequency
Channel Channel
(MHz) (MHz)
1 923.3 5 925.7
2 923.9 6 926.3
3 924.5 7 926.9
4 925.1 8 927.5

EUT was tested with Channel 1, 4 and 8.

Equipment Modifications
No modification was made to the EUT tested.

EUT Exercise Software
“VMware.exe” was uesd mode and power level is 9. SF=12

Duty cycle
LoRa Mode

FCC Part 15.247 Page 6 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Band Duty Cycle (%) T(us) 1/T(kHz) VBW Setting 10log(1/x)
LoRa 7.68 35000 0.03 1kHz 11.15

Local Support Equipment List and Details

Manufacturer Description Model Serial Number

DELL Adapter PA-1900-02D N/A

Rakwireless Debug board FT2232HL N/A

DELL Laptop E6410 N/A

External I/O Cable

Cable Description Length (m) From Port To

Un-Shielding Detachable DC Power Cable 1.2 Laptop Adapter
Un-Shielding Detachable AC Power Cable 1.5 LISN Adapter
Un-Shielding Detachable USB Cable 1.0 Debug board Laptop
Un-Shielding Detachable FFC Cable 0.2 EUT Debug board

Block Diagram of Test Setup
For conducted emission
LISN

Laptop 10cm 10cm
Debug EUT
10cm
Adapter Board
1.0 Meter

Non-Conductive Table
80 cm above Ground Plane

1.5 Meters
FCC Part 15.247 Page 7 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

SUMMARY OF TEST RESULTS

FCC Rules Description of Test Result

§15.247 (i) & §1.1310 &
Maximum Permissible exposure (MPE) Compliance
§2.1091
§15.203 Antenna Requirement Compliance

§15.207 (a) AC Line Conducted Emissions Compliance
§15.205, §15.209,
Spurious Emissions Compliance
§15.247(d)
§15.247 (a)(2) 6 dB Emission Bandwidth Compliance

§15.247(b)(3) Maximum Conducted Output Power Compliance

§15.247(d) 100 kHz Bandwidth of Frequency Band Edge Compliance

§15.247(e) Power Spectral Density Compliance

FCC Part 15.247 Page 8 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

TEST EQUIPMENT LIST

Serial Calibration Calibration
Manufacturer Description Model
Number Date Due Date
Conducted Emissions Test
Rohde & Schwarz EMI Test Receiver ESCS30 100176 2017-08-04 2018-08-04
3560.6650.12-
Rohde & Schwarz LISN ENV216 2017-12-21 2018-12-21
101613-Yb
Rohde & Schwarz Transient Limiter ESH3Z2 DE25985 2017-11-19 2018-05-17
Rohde & Schwarz CE Test software EMC 32 V8.53.0 NCR NCR
Conducted Emission UF A210B-1-
N/A N/A 2017-11-12 2018-05-12
Cable 0720-504504
Radiated Emission Test
Sunol Sciences Horn Antenna DRH-118 A052604 2017-12-22 2020-12-21
Rohde & Schwarz Signal Analyzer FSIQ26 8386001028 2017-04-24 2018-04-24
Mini Pre-amplifier ZVA-183-S+ 5969001149 2017-05-21 2018-05-21
HP Amplifier HP8447E 1937A01046 2017-11-19 2018-05-21
Sunol Sciences Broadband Antenna JB1 A040904-2 2017-12-17 2020-12-16
Rohde & Schwarz EMI Test Receiver ESCI 101120 2018-01-11 2019-01-11
Ducommun UFA210A-1- MFR64369
RF Cable 2017-11-19 2018-05-21
technologies 4724-30050U 223410-001
Ducommun
RF Cable 104PEA 218124002 2017-11-19 2018-05-21
technologies
Ducommun
RF Cable RG-214 1 2017-11-19 2018-05-21
technologies
Ducommun
RF Cable RG-214 2 2017-11-22 2018-05-22
technologies
Rohde & Schwarz Auto test software EMC 32 V9.10 NCR NCR
RF Conducted Test
Agilent P-Series Power Meter N1912A MY5000448 2018-01-02 2019-01-02
Wideband Power
Agilent N1921A MY54210016 2018-01-02 2019-01-02
Sensor
WEINSCHEL 10dB Attenuator N/A N/A 2017-11-22 2018-05-23
SPECTRUM
Rohde & Schwarz FSU26 200120 2017-12-24 2018-12-24
ANALYZER
Ducommun
RF Cable RG-214 3 2017-11-22 2018-05-22
technologies

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

FCC Part 15.247 Page 9 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

FCC §15.247 (I) & §1.1310 & §2.1091- MAXIMUM PERMISSIBLE
EXPOSURE (MPE)
Applicable Standard
According to subpart 15.247(i) and subpart §1.1310, systems operating under the provisions of this section
shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in
excess of the Commission’s guidelines.

Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091)

(B) Limits for General Population/Uncontrolled Exposure

Frequency Range Electric Field Magnetic Field Power Density Averaging Time
(MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minutes)

0.3–1.34 614 1.63 *(100) 30
1.34–30 824/f 2.19/f *(180/f²) 30
30–300 27.5 0.073 0.2 30
300–1500 / / f/1500 30
1500–100,000 / / 1.0 30

f = frequency in MHz; * = Plane-wave equivalent power density;

According to §1.1310 and §2.1091 RF exposure is calculated.

Calculated Formulary:

Predication of MPE limit at a given distance
S = PG/4R² = power density (in appropriate units, e.g. mW/cm2);
P = power input to the antenna (in appropriate units, e.g., mW);
G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain
factor, is normally numeric gain;
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm);

Calculated Data:

The worst case as below:

Max Tune-up
Antenna Gain Conducted Evaluation Power MPE
Frequency
Power Distance Density Limit
(MHz)
(cm) (mW/cm2) (mW/cm2)
(dBi) (numeric) (dBm) (mW)
923.3-927.5 2.0 1.58 11 12.59 20 0.004 0.6

Result: The device meet FCC MPE at 20 cm distance

FCC Part 15.247 Page 10 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

FCC §15.203 - ANTENNA REQUIREMENT
Applicable Standard
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 with the device. The use of a permanently attached
antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered
sufficient to comply with the provisions of this section. The manufacturer may design the unit so that a
broken antenna can be replaced by the user, but the user of a standard antenna jack or electrical connector
is prohibited. The structure and application of the EUT were analyzed to determine compliance with
section §15.203 of the rules. §15.203 state that the subject device must meet the following criteria:

a. Antenna must be permanently attached to the unit.
b. Antenna must use a unique type of connector to attach to the EUT.
Unit must be professionally installed, and installer shall be responsible for verifying that the correct
antenna is employed with the unit.
And according to FCC 47 CFR section 15.247 (b), if the transmitting antennas of directional gain greater
than 6dBi are used, the power shall be reduced by the amount in dB that the directional gain of the antenna
exceeds 6 dBi.

Antenna Connector Construction
The EUT has an external antenna with a non-standard antenna jack which the maximum antenna gain is
2.0 dBi, fulfill the requirement of this section. Please refer to the EUT photos.

Result: Compliance.

FCC Part 15.247 Page 11 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

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:

Correction 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 – Corrected Amplitude

Test Results Summary
According to the recorded data in following table, the EUT complied with the FCC Part 15.207,

Refer to CISPR16-4-2:2011 and CISPR 16-4-1:2009, the measured level complies with the limit if

Lm + U(Lm) ≤ Llim + Ucispr

In BACL, U(Lm) is less than Ucispr, if Lm is less than Llim, it implies that the EUT complies with the limit.

Test Data
Environmental Conditions

Temperature: 24 ℃
Relative Humidity: 56 %
ATM Pressure: 101.0 kPa

The testing was performed by Jacob Kong on 2018-04-18.

EUT operation mode: Transmitting

FCC Part 15.247 Page 13 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

AC 120V/60 Hz, Line

90

80

70

QP
60
Level in dBμ

AV
50

40

30

20

10

0
150k 300 400 500 800 1M 2M 3M 4M 5M 6 8 10M 20M 30M
Frequency in Hz

Corrected Correction
Frequency Limit Margin Detector
Amplitude Factor
(MHz) (dBμV) (dB) (PK/Ave./QP)
(dBμV) (dB)
0.991090 38.5 20.0 56.0 17.5 QP
1.042250 38.7 20.0 56.0 17.3 QP
1.136690 38.6 20.0 56.0 17.4 QP
1.286710 41.3 20.0 56.0 14.7 QP
1.574510 35.8 20.0 56.0 20.2 QP
2.051550 37.1 20.0 56.0 18.9 QP
0.991090 30.9 20.0 46.0 15.1 Ave.
1.042250 30.7 20.0 46.0 15.3 Ave.
1.136690 32.6 20.0 46.0 13.4 Ave.
1.286710 35.9 20.0 46.0 10.1 Ave.
1.574510 29.5 20.0 46.0 16.5 Ave.
2.051550 30.4 20.0 46.0 15.6 Ave.

FCC Part 15.247 Page 14 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

AC 120V/60 Hz, Neutral

90

80

70

QP
60
Level in dBμ

AV
50

40

30

20

10

0
150k 300 400 500 800 1M 2M 3M 4M 5M 6 8 10M 20M 30M
Frequency in Hz

Corrected Correction
Frequency Limit Margin Detector
Amplitude Factor
(MHz) (dBμV) (dB) (PK/Ave./QP)
(dBμV) (dB)
0.991030 38.9 20.0 56.0 17.1 QP
1.113170 38.6 20.0 56.0 17.4 QP
1.172330 40.4 20.0 56.0 15.6 QP
1.282710 38.3 20.0 56.0 17.7 QP
1.684470 36.0 20.0 56.0 20 QP
2.027670 36.7 20.0 56.0 19.3 QP
0.991030 30.2 20.0 46.0 15.8 Ave.
1.113170 32.6 20.0 46.0 13.4 Ave.
1.172330 33.6 20.0 46.0 12.4 Ave.
1.282710 33.2 20.0 46.0 12.8 Ave.
1.684470 27.9 20.0 46.0 18.1 Ave.
2.027670 30.3 20.0 46.0 15.7 Ave.

Note:
1) Correction Factor =LISN VDF (Voltage Division Factor) + Cable Loss + Transient Limiter Attenuation
2) Corrected Amplitude = Reading + Correction Factor
3) Margin = Limit – Corrected Amplitude
FCC Part 15.247 Page 15 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

EMI Test Receiver & Spectrum Analyzer Setup
The system was investigated from 30 MHz to 10 GHz.

During the radiated emission test, the EMI test receiver & Spectrum Analyzer Setup were set with the
following configurations:

Frequency Range RBW Video B/W IF B/W Measurements

30 MHz – 1000 MHz 100 kHz 300 kHz 120 kHz QP
1MHz 3 MHz / PK
Note 1
Above 1 GHz 1MHz 10 Hz / Average
Note 2
1MHz ＞1/T / Average
Note 1: when duty cycle is no less than 98%
Note 2: when duty cycle is less than 98%

Test Procedure
Maximizing procedure was performed on the highest emissions to ensure that the EUT complied with all
installation combinations.

Data was recorded in Quasi-peak detection mode for frequency range of 30 MHz-1 GHz, peak and
Average detection modes for frequencies 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 recorded data in following table, the EUT complied with the FCC Title 47, Part 15,
Subpart C, section 15.205, 15.209 and 15.247.

Refer to CISPR16-4-2:2011 and CISPR 16-4-1:2009, the measured level complies with the limit if

Lm + U(Lm) ≤ Llim + Ucispr

In BACL, U(Lm) is less than Ucispr, if Lm is less than Llim, it implies that the EUT complies with the limit.

FCC Part 15.247 Page 17 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Test Data
Environmental Conditions

Temperature: 24 ℃
Relative Humidity: 56 %
ATM Pressure: 101.0 kPa

The testing was performed by Jacob Kong on 2018-04-17.

Test range 30MHz – 10GHz, please refer to the following tables and plots.

Worst case at Low channel:

80

70 Fundamental

60
Electric Field Strength QP-3m

50
Level in dBμV/

40

30

20

10

0
30M 50 60 80 100M 200 300 400 500 800 1G
Frequency in Hz

FCC Part 15.247 Page 18 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Corrected Antenna Turntable Correction
Frequency Antenna Limit Margin
Amplitude height position Factor
(MHz) Polarity (dBμV/m) (dB)
(dBμV/m) (cm) (degree) (dB/m)
102.051125 40.15 242.0 H 0.0 -8.2 43.50 3.35
114.009125 39.99 275.0 H 171.0 -7.0 43.50 3.51
126.009500 39.42 313.0 H 175.0 -5.8 43.50 4.08
150.033500 40.30 222.0 H 0.0 -4.5 43.50 3.20
240.004000 42.71 116.0 H 135.0 -3.2 46.00 3.29
398.977125 44.02 107.0 H 170.0 -0.3 46.00 1.98

FCC Part
Receiver Rx Antenna Corrected Corrected
Frequency Turntable 15.247/205/209
Factor Amplitude
(MHz) Reading Degree Height Polar
PK/QP/Ave. (dB/m) (dBμV/m) Limit Margin
(dBμV) (m) (H/V) (dBμV/m) (dB)
Low Channel (923.3 MHz)
923.30 62.50 QP 123 2.4 H 33.80 96.30 / /
923.30 63.40 QP 151 1.8 V 33.80 97.20 / /
901.99 15.27 QP 350 1.3 H 34.50 49.77 76.30 26.53
901.99 15.40 QP 198 1.4 V 34.50 49.90 77.20 27.30
1846.60 48.59 PK 123 1.2 H -5.22 43.37 74 30.63
1846.60 43.02 Ave. 123 1.2 H -5.22 37.80 54 16.20
1846.60 46.35 PK 355 1.6 V -5.22 41.13 74 32.87
1846.60 41.47 Ave. 355 1.6 V -5.22 36.25 54 17.75
Middle Channel(925.1MHz)
925.10 62.10 QP 27 1.7 H 33.80 95.90 / /
925.10 63.30 QP 138 1.5 V 33.80 97.10 / /
1850.20 49.03 PK 165 1.7 H -5.17 43.86 74 30.14
1850.20 44.29 Ave. 165 1.7 H -5.17 39.12 54 14.88
1850.20 47.21 PK 43 1.4 V -5.17 42.04 74 31.96
1850.20 42.64 Ave. 43 1.4 V -5.17 37.47 54 16.53
High Channel(927.5 MHz)
927.50 62.40 QP 248 2.4 H 33.80 96.20 / /
927.50 62.90 QP 212 1 V 33.80 96.70 / /
928.01 15.27 QP 108 1.8 H 34.50 62.90 76.20 13.30
928.01 15.40 QP 68 1.3 V 34.50 63.80 76.70 12.90
1855.00 49.11 PK 135 1.4 H -5.17 43.94 74 30.06
1855.00 44.18 Ave. 135 1.4 H -5.17 39.01 54 14.99
1855.00 47.32 PK 243 2.3 V -5.17 42.15 74 31.85
1855.00 42.53 Ave. 243 2.3 V -5.17 37.36 54 16.64

Note:
Corrected Factor = Antenna factor (RX) + Cable Loss – Amplifier Factor
Corrected Amplitude = Corrected Factor + Reading
Margin = Limit - Corrected. Amplitude
The other spurious emission which is 20dB to the limit was not recorded.

FCC Part 15.247 Page 19 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Pre-scan with High channel for Peak
Horizontal

Vertical

FCC Part 15.247 Page 20 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Pre-scan for Average
Horizontal

Vertical

FCC Part 15.247 Page 21 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

FCC §15.247(a) (2) – 6 dB EMISSION BANDWIDTH
Applicable Standard
Systems using digital modulation techniques may operate in the 902–928 MHz, 2400–2483.5 MHz, and
5725–5850 MHz bands. The minimum 6 dB bandwidth shall be at least 500 kHz.

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 without connection to measurement instrument. Turn on the EUT and connect it to
measurement instrument. 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 6 dB from the reference
level. Record the frequency difference as the emission bandwidth.
4. Repeat above procedures until all frequencies measured were complete.

Signal Analyzer
EUT Attenuator

Test Data
Environmental Conditions

Temperature: 25 ℃
Relative Humidity: 52 %
ATM Pressure: 101.0 kPa

The testing was performed by Jacob Kong on 2018-04-13.

Test Result: Pass.

Please refer to the following table and plots.

FCC Part 15.247 Page 22 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

EUT operation mode: Transmitting

Frequency 6 dB Emission Bandwidth Limit
Channel
(MHz) (kHz) (kHz)

Low 923.3 615.38 ≥500
Middle 925.1 586.54 ≥500
High 927.5 586.54 ≥500

Low Channel
* RBW 100 kHz Marker 1 [T1 ]
* VBW 300 kHz 8.41 dBm
Ref 34 dBm * Att 20 dB SWT 2.5 ms 923.341666667 MHz

Offset 10.5 dB ndB [T1] 6.00 dB
30
BW 615.384615385 kHz
Temp 1 [T1 ndB] A
2.20 dBm
20
1 PK 922.995512821 MHz
MAXH
Temp 2 [T1 ndB]
1 LVL
10 2.17 dBm
923.610897436 MHz
T1 T2

0

-10

-20
3DB

-30

-40

-50

-60

Center 923.3 MHz 200 kHz/ Span 2 MHz

Date: 13.APR.2018 23:53:53

FCC Part 15.247 Page 23 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Middle Channel
* RBW 100 kHz Marker 1 [T1 ]
* VBW 300 kHz 9.09 dBm
Ref 34 dBm * Att 20 dB SWT 2.5 ms 925.119230769 MHz

Offset 10.5 dB ndB [T1] 6.00 dB
30
BW 586.538461538 kHz
Temp 1 [T1 ndB] A
3.20 dBm
20
1 PK 924.801923077 MHz
MAXH
Temp 2 [T1 ndB]
1 LVL
10 3.09 dBm
T1 T2 925.388461538 MHz

0

-10

-20
3DB

-30

-40

-50

-60

Center 925.1 MHz 200 kHz/ Span 2 MHz

Date: 13.APR.2018 23:39:59

High Channel
* RBW 100 kHz Marker 1 [T1 ]
* VBW 300 kHz 10.16 dBm
Ref 35.5 dBm * Att 20 dB SWT 2.5 ms 927.487179487 MHz

Offset 10.5 dB ndB [T1] 6.00 dB
30 BW 586.538461538 kHz
Temp 1 [T1 ndB] A
4.05 dBm
1 PK 20 927.201923077 MHz
MAXH
Temp 2 [T1 ndB]
1 LVL
4.20 dBm
10
T2 927.788461538 MHz
T1

0

-10

-20 3DB

-30

-40

-50

-60

Center 927.5 MHz 200 kHz/ Span 2 MHz

Date: 13.APR.2018 23:27:03

FCC Part 15.247 Page 24 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

FCC §15.247(b) (3) - MAXIMUM CONDUCTED OUTPUT POWER
Applicable Standard
According to FCC §15.247(b) (3), for systems using digital modulation in the 902-928 MHz, 2400-2483.5
MHz, and 5725-5850 MHz bands: 1 Watt. As an alternative to a peak power measurement, compliance
with the one Watt limit can be based on a measurement of the maximum conducted output power.
Maximum Conducted Output Power is defined as the total transmit power delivered to all antennas and
antenna elements averaged across all symbols in the signaling alphabet when the transmitter is operating at
its maximum power control level. Power must be summed across all antennas and antenna elements. The
average must not include any time intervals during which the transmitter is off or is transmitting at a
reduced power level. If multiple modes of operation are possible (e.g., alternative modulation methods),
the maximum conducted output power is the highest total transmit power occurring in any mode.

Test Procedure

1. Place the EUT on a bench and set it in transmitting mode.
2. Remove the antenna from the EUT and then connect a low loss RF cable from the antenna port to one
test equipment.
3. Add a correction factor to the display.

Power Meter
EUT Attenuator

Test Data
Environmental Conditions

Temperature: 25 ℃
Relative Humidity: 52 %
ATM Pressure: 101.0 kPa

The testing was performed by Jacob Kong on 2018-04-13.

EUT operation mode: Transmitting

Frequency Peak Output Power Limit
Channel
(MHz) (dBm) (dBm)
Low 923.3 8.46 30
Middle 925.1 9.15 30
High 927.5 10.27 30

FCC Part 15.247 Page 25 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

FCC §15.247(d) – 100 kHz BANDWIDTH OF FREQUENCY BAND EDGE
Applicable Standard
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)).

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 without connection to measurement instrument. Turn on the EUT and connect its
antenna terminal to measurement instrument via a low loss cable. Then set it to any one measured
frequency within its operating range, and make sure the instrument is operated in its linear range.
3. Set RBW to 100 kHz and VBW of spectrum analyzer to 300 kHz with a convenient frequency span
including 100 kHz bandwidth from band edge.
4. Measure the highest amplitude appearing on spectral display and set it as a reference level. Plot the
graph with marking the highest point and edge frequency.
5. Repeat above procedures until all measured frequencies were complete.

Signal Analyzer
EUT Attenuator

Test Data
Environmental Conditions

Temperature: 25 ℃
Relative Humidity: 52 %
ATM Pressure: 101.0 kPa

The testing was performed by Jacob Kong on 2018-04-13.

EUT operation mode: Transmitting

Test Result: Compliance

Please refer to the following plots.

FCC Part 15.247 Page 26 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Band Edge, Left Side
* RBW 100 kHz Marker 1 [T1 ]
* VBW 300 kHz -42.45 dBm
Ref 34 dBm * Att 20 dB SWT 20 ms 894.628205128 MHz

Offset 10.5 dB
30

A

20
1 PK
MAXH
LVL
10
D1 8.5 dBm

0

-10
D2 -11.5 dBm

-20
3DB

-30

-40 1

-50

-60

Center 902 MHz 5 MHz/ Span 50 MHz

Date: 14.APR.2018 00:06:48

Band Edge, Right Side
* RBW 100 kHz Marker 1 [T1 ]
* VBW 300 kHz -17.54 dBm
Ref 35.5 dBm * Att 20 dB SWT 2.5 ms 928.024038462 MHz

Offset 10.5 dB
30
A

1 PK 20
MAXH
LVL
10 D1 10.2 dBm

0

-10 D2 -9.8 dBm
1

-20 3DB

-30

-40

-50

-60

Center 928 MHz 300 kHz/ Span 3 MHz

Date: 13.APR.2018 23:28:28

FCC Part 15.247 Page 27 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

FCC §15.247(e) - POWER SPECTRAL DENSITY
Applicable Standard
For digitally modulated systems, the power spectral density conducted from the intentional radiator to the
antenna shall not be greater than 8 dBm in any 3 kHz band during any time interval of continuous
transmission. This power spectral density shall be determined in accordance with the provisions of
paragraph (b) of this section. The same method of determining the conducted output power shall be used to
determine the power spectral density.

Test Procedure
1. Use this procedure when the maximum peak conducted output power in the fundamental emission is
used to demonstrate compliance.
2. Set the RBW to: 3kHz≤ RBW≤100 kHz.
3. Set the VBW ≥ 3×RBW.
4. Set the span to 1.5 times the DTS bandwidth.
5. Detector = peak.
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.

Signal Analyzer
EUT Attenuator

Test Data
Environmental Conditions

Temperature: 25 ℃
Relative Humidity: 52 %
ATM Pressure: 101.0 kPa

The testing was performed by Jacob Kong on 2018-04-13.

EUT operation mode: Transmitting

Test Result: Pass

Frequency PSD Limit
Channel
(MHz) (dBm/3kHz) (dBm/3kHz)

Low 923.3 4.15 ≤8
Middle 925.1 5.16 ≤8
High 927.5 6.07 ≤8

FCC Part 15.247 Page 28 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Power Spectral Density, Low Channel
* RBW 3 kHz Marker 1 [T1 ]
* VBW 10 kHz 4.15 dBm
Ref 34 dBm * Att 20 dB SWT 105 ms 923.294083333 MHz

Offset 10.5 dB
30

A

20
1 PK
MAXH
LVL
10
1

0

-10

-20
3DB

-30

-40

-50

-60

Center 923.3 MHz 92.3 kHz/ Span 923 kHz

Date: 13.APR.2018 23:58:27

Power Spectral Density, Middle Channel
* RBW 3 kHz Marker 1 [T1 ]
* VBW 10 kHz 5.16 dBm
Ref 34 dBm * Att 20 dB SWT 100 ms 925.050584936 MHz

Offset 10.5 dB
30

A

20
1 PK
MAXH
LVL
10
1

0

-10

-20
3DB

-30

-40

-50

-60

Center 925.1 MHz 88.1 kHz/ Span 881 kHz

Date: 13.APR.2018 23:52:45

FCC Part 15.247 Page 29 of 30

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ180322002-00

Power Spectral Density, High Channel
* RBW 3 kHz Marker 1 [T1 ]
* VBW 10 kHz 6.07 dBm
Ref 34 dBm * Att 20 dB SWT 100 ms 927.444937500 MHz

Offset 10.5 dB
30

A

20
1 PK
MAXH
LVL
10 1

0

-10

-20
3DB

-30

-40

-50

-60

Center 927.5 MHz 88.1 kHz/ Span 881 kHz

Date: 13.APR.2018 23:38:50

***** END OF REPORT *****

FCC Part 15.247 Page 30 of 30

Document Created: 2018-05-10 09:33:48
Document Modified: 2018-05-10 09:33:48

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