Test Report (LoRa)

FCC ID: 2AF6B-RAK7258

Test Report

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FCCID_4274860

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

TABLE OF CONTENTS

GENERAL INFORMATION .......................................................................................................................................3
PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) .....................................................................................3
OBJECTIVE ...................................................................................................................................................................3
RELATED SUBMITTAL(S)/GRANT(S) .............................................................................................................................3
TEST METHODOLOGY ..................................................................................................................................................3
MEASUREMENT UNCERTAINTY ....................................................................................................................................4
TEST FACILITY .............................................................................................................................................................4
SYSTEM TEST CONFIGURATION ..........................................................................................................................5
DESCRIPTION OF TEST CONFIGURATION ......................................................................................................................5
EQUIPMENT MODIFICATIONS .......................................................................................................................................5
EUT EXERCISE SOFTWARE ..........................................................................................................................................5
DUTY CYCLE ................................................................................................................................................................5
SUPPORT EQUIPMENT LIST AND DETAILS ....................................................................................................................6
EXTERNAL I/O CABLE..................................................................................................................................................6
BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................6
SUMMARY OF TEST RESULTS ...............................................................................................................................7

TEST EQUIPMENT LIST ...........................................................................................................................................8
FCC §15.247 (I) & §1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) ..................................9
APPLICABLE STANDARD ..............................................................................................................................................9
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 Part 15.247 Page 2 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

GENERAL INFORMATION
Product Description for Equipment under Test (EUT)

Product Indoor LoRa Gateway
Tested Model RAK7258
Frequency Range 923.3-927.5 MHz
Transmit Power 12.70dBm
Modulation Technique chirp –based Spread-Spectrum
Antenna Specification 3dBi
Voltage Range DC 12.0V from adapter or DC 48V from POE
Date of Test 2019-03-25~ 2019-04-04
Sample serial number 190308005
Received date 2019-03-08
Sample/EUT Status Good condition
Model: PSY1202000US
Adapter information Input: AC 100-240V, 50/60Hz, 1.3A
Output: DC 12.0V, 2.0A

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)
FCC Part 15.247 DTS submissions with FCC ID: 2AF6B-RAK7258.

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.

FCC Part 15.247 Page 3 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

Measurement Uncertainty

Parameter Uncertainty
Occupied Channel Bandwidth ±5%
RF Output Power with Power meter ±0.73dB
RF conducted test with spectrum ±1.6dB
AC Power Lines Conducted Emissions ±1.95dB
Emissions, Below 1GHz ±4.75dB
Radiated Above 1GHz ±4.88dB
Temperature ±1℃
Humidity ±6%
Supply voltages ±0.4%

Note: Otherwise required by the applicant or Product Regulations, Decision Rule in this report did not consider the
uncertainty.

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 4 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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
“Xshell” software was used and power level is --dig 0 --mix 14 --pa 1.

Duty cycle
LoRa Mode

RBW 1 MHz Marker 1 [T1 ]
* VBW 3 MHz 10.75 dBm
Ref 25.5 dBm * Att 10 dB SWT 100 ms 80.288462 ms

Offset 10.5 dB
20
A
1 SGL
1 PK 10
TRG 8.3 dBm
MAXH TRG
LVL
0

-10

-20

-30 3DB

-40

-50

-60

-70

Center 923.3 MHz 10 ms/

Date: 19.DEC.2018 18:41:27

FCC Part 15.247 Page 5 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

Band Duty Cycle (%) T(us) 1/T(kHz) VBW Setting 10log(1/x)
LoRa 100 - - 10Hz -

Note: The LoRa module built in the EUT was identical to the certified module
(FCC ID: 2AF6B-RAK2247) except the antenna. So the RF conducted data can refer to the report of
the certified module.

Support Equipment List and Details

Manufacturer Description Model Serial Number

Sandisk U-disk N/A 3491
DELL Laptop VOSTRO 220S 127BP2X

External I/O Cable

Cable Description Length (m) From Port To

Un-shielding Detachable DC Cable 1.0 EUT Adapter

Block Diagram of Test Setup
For conducted emission
U-disk
laptop Adapter
LISN

EUT
10cm

Receptacle
1.0 Meter

Non-Conductive Table
80 cm above Ground Plane

1.5 Meters

FCC Part 15.247 Page 6 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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*

Compliance*: The LoRa module built in the EUT was identical to the certified module
(FCC ID: 2AF6B-RAK2247) except the antenna, So the RF conducted data can refer to the
report of the certified module, report No.: RSZ181207002-00B, which was tested by Bay
Area Compliance Laboratories Corp. (Shenzhen).

FCC Part 15.247 Page 7 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

TEST EQUIPMENT LIST

Serial Calibration Calibration
Manufacturer Description Model
Number Date Due Date
Conducted Emissions Test
Rohde & Schwarz EMI Test Receiver ESCS30 100176 2018-07-11 2019-07-11
3560.6650.12-
Rohde & Schwarz LISN ENV216 2019-01-25 2020-01-25
101613-Yb
Rohde & Schwarz Transient Limiter ESH3Z2 DE25985 2019-03-02 2020-03-02
Rohde & Schwarz CE Test software EMC 32 V8.53.0 NCR NCR
Conducted Emission UF A210B-1-
Unknown 78652 2018-11-12 2019-11-12
Cable 0720-504504
Radiated Emission Test
Sunol Sciences Horn Antenna DRH-118 A052604 2017-12-22 2020-12-21
Rohde & Schwarz Signal Analyzer FSEM 845987/005 2018-06-23 2019-06-23
Rohde & Schwarz Signal Analyzer FSV40 101473 2019-01-09 2020-01-08
COM-POWER Pre-amplifier PA-122 181919 2018-11-12 2019-11-12
Sonoma Instrument Amplifier 310N 186238 2018-11-12 2019-11-12
Sunol Sciences Broadband Antenna JB1 A040904-1 2017-12-22 2020-12-21
1316.3003K03
Rohde & Schwarz EMI Test Receiver ESR 2018-07-11 2019-07-11
-101746-zn
Ducommun UFA147A- MFR64639
RF Cable 2018-11-12 2019-11-12
technologies 2362-100100 231029-003
Ducommun
RF Cable 104PEA 218124002 2018-11-12 2019-11-12
technologies
Ducommun
RF Cable RG-214 1 2018-11-19 2019-05-21
technologies
Ducommun
RF Cable RG-214 2 2018-11-12 2019-11-12
technologies
Rohde & Schwarz Auto test software EMC 32 V9.10 NCR NCR
BSF2402-
Sinoscite Band Reject Filter 2480MN- 99632 2018-11-12 2019-11-12
0898-001

* 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 8 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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:

Antenna Gain Conducted Power Evaluation Power
Frequency MPE Limit
Distance Density
(MHz) (dBi) (numeric) (dBm) (mW) (mW/cm2)
(cm) (mW/cm2)
2412-2472 3.0 2.0 17.5 56.23 20 0.02 1
923.3-927.5 2.0 1.58 13 19.95 20 0.006 0.6

FCC Part 15.247 Page 9 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

Consider the LoRa and WIFI transmitting simultaneously:

The ratio= MPE/LimitLoRa+ MPE/LimitWIFI =0.006/0.6+0.02/1=0.03<1.0

Note: To maintain compliance with the FCC’s RF exposure guidelines, place the equipment at least 20cm
from nearby persons.

Result: Compliance

FCC Part 15.247 Page 10 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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: 25 ℃
Relative Humidity: 50 %
ATM Pressure: 101.0 kPa

The testing was performed by Haiguo Li on 2019-04-04.

Pre-test with POE power and adapter power, the worst case is by adapter.

EUT operation mode: Transmitting

FCC Part 15.247 Page 13 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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)
0.347130 38.8 19.9 59.0 20.2 QP
0.391790 48.4 19.9 58.0 9.6 QP
0.396090 48.8 19.9 57.9 9.1 QP
0.455130 36.7 19.8 56.8 20.1 QP
1.128870 37.7 19.8 56.0 18.3 QP
7.934990 42.5 19.9 60.0 17.5 QP
0.347130 31.4 19.9 49.0 17.6 Ave.
0.391790 40.2 19.9 48.0 7.8 Ave.
0.396090 39.3 19.9 47.9 8.6 Ave.
0.455130 26.9 19.8 46.8 19.9 Ave.
1.128870 28.8 19.8 46.0 17.2 Ave.
7.934990 38.5 19.9 50.0 11.5 Ave.

FCC Part 15.247 Page 14 of 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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)
0.294500 43.1 19.7 60.4 17.3 QP
0.336870 42.3 19.8 59.3 17.0 QP
0.391790 48.5 19.8 58.0 9.5 QP
0.392090 48.7 19.8 58.0 9.3 QP
1.085650 35.6 19.8 56.0 20.4 QP
7.931110 41.6 19.9 60.0 18.4 QP
0.294500 37.2 19.7 50.4 13.2 Ave.
0.336870 35.4 19.8 49.3 13.9 Ave.
0.391790 39.8 19.8 48.0 8.2 Ave.
0.392090 40.2 19.8 48.0 7.8 Ave.
1.085650 27.5 19.8 46.0 18.5 Ave.
7.931110 37.0 19.9 50.0 13.0 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 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

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 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

Test Data
Environmental Conditions

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

The testing was performed by Jacob Kong on 2019-03-25.

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

Pre-test with POE power and adapter power, the worst case is by Adapter.

Worst case at Low channel:

80

Fundamental
70

60

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 21

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.:RSZ190308005-00C

Corrected Antenna Turntable Correction
Frequency Antenna Limit Margin
Amplitude height position Factor
(MHz) Polarity (dBμV/m) (dB)
(dBμV/m) (cm) (degree) (dB/m)
42.191625 31.28 106.0 V 50.0 -15.3 40.00 8.72
45.869000 31.80 106.0 V 30.0 -17.7 40.00 8.20
51.268625 33.03 107.0 V 104.0 -19.7 40.00 6.97
85.438250 35.61 400.0 H 31.0 -19.5 40.00 4.39
86.230875 32.58 381.0 H 241.0 -19.4 40.00 7.42
255.893000 34.93 108.0 H 271.0 -13.7 46.00 11.07

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)
902 20.6 QP 359 1.5 V 4.4 25.0 46 21.0
1504.00 46.37 PK 224 2.3 H -1.04 45.33 74 28.67
1504.00 41.12 Ave. 224 2.3 H -1.04 40.08 54 13.92
1846.60 54.62 PK 58 1.1 H -1.41 53.21 74 20.79
1846.60 50.84 Ave. 58 1.1 H -1.41 49.43 54 4.57
Middle Channel(925.1MHz)
1534.22 45.27 PK 268 1.9 H -0.94 44.33 74 29.67
1534.22 40.26 Ave. 268 1.9 H -0.94 39.32 54 14.68
1850.20 55.56 PK 122 1.8 H -1.34 54.22 74 19.78
1850.20 51.70 Ave. 122 1.8 H -1.34 50.36 54 3.64
High Channel(927.5 MHz)
928 31.0 QP 169 2.5 V 7.4 38.4 46 7.6
1568.30 46.32 PK 329 1.5 H -0.84 45.48 74 28.52
1568.30 40.29 Ave. 329 1.5 H -0.84 39.45 54 14.55
1855.00 56.25 PK 122 1.8 H -1.34 54.91 74 19.09
1855.00 51.92 Ave. 122 1.8 H -1.34 50.58 54 3.42

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 21

Document Created: 2019-05-14 01:25:16
Document Modified: 2019-05-14 01:25:16

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