1901RSU029-U1-FCC-15.256-Test-Report

FCC ID: 2ACSOGDRD87

Test Report

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                                    MRT Technology (Suzhou) Co., Ltd            Report No.: 1901RSU029-U1
                                    Phone: +86-512-66308358                     Report Version:        V01
                                    Web:    www.mrt-cert.com                    Issue Date:     03-26-2019




                         MEASUREMENT REPORT
                                     FCC PART15.256

FCC ID:                         2ACSOGDRD87

APPLICANT:                      Beijing GODA Instruments Co., LTD.



Application Type:               Certification

Product:                        80G Radar Level Meter

Model No.:                      GDRD81, GDRD82, GDRD83, GDRD84, GDRD85,
                                GDRD87, GDRD88, GDRD89
Brand Name:                     GODA

FCC Classification:             LPR - Level Probing Radar

FCC Rule Part(s):               FCC PART15.256

Test Procedure(s):              KDB890966 D01 Meas level Probing Radars v01r01
                                TR14-1007 Measurement of FMCW
Test Date:                      January 29 ~ March 01, 2019




Reviewed By:

                                   (Sunny Sun)

Approved By:

                                   ( Robin Wu )




The test results relate only to the samples tested.
This equipment has been shown to be capable of compliance with the applicable technical standards as
indicated in the measurement report and was tested in accordance with the measurement procedures specified
in KDB890966 D01 v01r01. Test results reported herein relate only to the item(s) tested.
The test report shall not be reproduced except in full without the written approval of MRT Technology (Suzhou)
Co., Ltd.
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                                                           Report No.: 1901RSU029-U1


                                Revision History

   Report No.         Version      Description      Issue Date            Note

 1901RSU029-U1        Rev. 01      Initial Report   03-26-2019            Valid




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                                                          CONTENTS
Description                                                                                                                                Page
1.   INTRODUCTION ........................................................................................................................ 6

     1.1.      Scope .............................................................................................................................. 6
     1.2.      MRT Test Location .......................................................................................................... 6

2.   PRODUCT INFORMATION ........................................................................................................ 7

     2.1.      Equipment Description .................................................................................................... 7
     2.2.      Test Mode ....................................................................................................................... 8
     2.3.      EMI Suppression Device(s)/Modifications ....................................................................... 8
     2.4.      Labeling Requirements ................................................................................................... 8

3.   DESCRIPTION of TEST............................................................................................................. 9

     3.1.      Evaluation Procedure ...................................................................................................... 9
     3.2.      AC Line Conducted Emissions ........................................................................................ 9
     3.3.      Radiated Emissions....................................................................................................... 10

4.   ANTENNA REQUIREMENTS .................................................................................................. 11

5.   TEST EQUIPMENT CALIBRATION DATE .............................................................................. 12

6.   MEASUREMENT UNCERTAINTY ........................................................................................... 14

7.   TEST RESULT ......................................................................................................................... 15

     7.1.      Summary ....................................................................................................................... 15
     7.2.      Fundmental Bandwidth .................................................................................................. 16
     7.2.1.       Test Limit ................................................................................................................... 16
     7.2.2.       Test Procedure used ................................................................................................. 16
     7.2.3.       Test Setting ................................................................................................................ 16
     7.2.4.       Test Setup ................................................................................................................. 16
     7.2.5.       Test Result ................................................................................................................. 17
     7.3.      Fundamental Emissions ................................................................................................ 18
     7.3.1.       Test Limit ................................................................................................................... 18
     7.3.2.       Test Procedure used ................................................................................................. 18
     7.3.3.       Test Setting ................................................................................................................ 18
     7.3.4.       Test Setup ................................................................................................................. 19
     7.3.5.       Test Results ............................................................................................................... 20
     7.4.      Unwanted Emissions ..................................................................................................... 21
     7.4.1.       Test Limit ................................................................................................................... 21
     7.4.2.       Test Procedure used ................................................................................................. 21

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      7.4.3.       Test Procedure .......................................................................................................... 21
      7.4.4.       Test Setup ................................................................................................................. 22
      7.4.5.       Test Result ................................................................................................................. 24
      7.5.      Antenna Requirements .................................................................................................. 26
      7.5.1.       Test Limit ................................................................................................................... 26
      7.5.2.       Test Procedure used ................................................................................................. 26
      7.5.3.       Test Setting ................................................................................................................ 26
      7.5.4.       Test Setup ................................................................................................................. 26
      7.5.5.       Test Result ................................................................................................................. 26
      7.6.      Frequency Stability ........................................................................................................ 27
      7.6.1.       Test Limit ................................................................................................................... 27
      7.6.2.       Test Procedure used ................................................................................................. 27
      7.6.3.       Test Procedure .......................................................................................................... 27
      7.6.4.       Test Setup ................................................................................................................. 28
      7.6.5.       Test Result ................................................................................................................. 29
      7.7.      AC Conducted Emissions Measurement....................................................................... 30
      7.7.1.       Test Limit ................................................................................................................... 30
      7.7.2.       Test Setup ................................................................................................................. 30
      7.7.3.       Test Result ................................................................................................................. 30

8.    CONCLUSION.......................................................................................................................... 31

Appendix A - Test Setup Photograph ............................................................................................ 32

Appendix B - EUT Photograph ...................................................................................................... 33




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§2.1033 General Information
Applicant:                Beijing GODA Instruments Co., LTD.
                          Hongfu Enterprise Incubation Yard 10,No.2 Workshop 2-4, Chang Ping
Applicant Address:
                          Dist.Beijing,102209 China
Manufacturer:             Beijing GODA Instruments Co., LTD.
                          Hongfu Enterprise Incubation Yard 10,No.2 Workshop 2-4, Chang Ping
Manufacturer Address:
                          Dist.Beijing,102209 China
Test Site:                MRT Technology (Suzhou) Co., Ltd
Test Site Address:        D8 Building, No.2 Tian’edang Rd., Wuzhong Economic Development
                          Zone, Suzhou, China
FCC Registration No.:     893164
Test Device Serial No.:   N/A               Production   Pre-Production     Engineering


Test Facility / Accreditations
Measurements were performed at MRT Laboratory located in Tian’edang Rd., Suzhou, China.
 MRT facility is a FCC registered (MRT Reg. No. 893164) test facility with the site description
  report on file and has met all the requirements specified in ANSI C63.4-2014.
 MRT facility is an IC registered (MRT Reg. No. 11384A-1) test laboratory with the site
  description on file at Industry Canada.
 MRT facility is a VCCI registered (R-20025, G-20034,
  C-20020, T-20020) test laboratory with the site
  description on file at VCCI Council.
 MRT Lab is accredited to ISO 17025 by the American
  Association for Laboratory Accreditation (A2LA) under
  the American Association for Laboratory Accreditation
  Program (A2LA Cert. No. 3628.01) in EMC,
  Telecommunications, Radio and SAR testing.




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1.    INTRODUCTION
1.1. Scope
Measurement and determination of electromagnetic emissions (EMC) of radio frequency devices
including intentional and/or unintentional radiators for compliance with the technical rules and
regulations of the Federal Communications Commission and the Industry Canada Certification and
Engineering Bureau.



1.2. MRT Test Location
The map below shows the location of the MRT LABORATORY, its proximity to the Taihu Lake.
These measurement tests were conducted at the MRT Technology (Suzhou) Co., Ltd. Facility
located at D8 Building, No.2 Tian’edang Rd., Wuzhong Economic Development Zone, Suzhou,
China. The measurement facility compliant with the test site requirements specified in ANSI
C63.4-2014.




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2.    PRODUCT INFORMATION
2.1. Equipment Description
Product Name:                80G Radar Level Meter
Model No.:                   GDRD81, GDRD82, GDRD83, GDRD84, GDRD85, GDRD87, GDRD88, GDRD89
Brand Name:                  GODA
Frequency Range:             76 ~ 81GHz
Modulation Type:             FMCW
Antenna Type:                Horn Antenna
Input Power:                 DC 24V


Model Difference
Model No. Classification      Shell material                Antenna Material     Installation    Max. Antenna Gain
                              Plastic / Aluminium alloy /
GDRD81       Liquid                                         FEP / PP             Thread          32 dBi
                              Stainless steel
                              Plastic / Aluminium alloy /
GDRD82       Liquid                                         316L+PTFE            Flange          32 dBi
                              Stainless steel
                              Plastic / Aluminium alloy /
GDRD83       Liquid                                         FEP / 316L+PTFE      Thread          15 dBi
                              Stainless steel
                              Plastic / Aluminium alloy /
GDRD84       Liquid                                         PP                   Hanging         32 dBi
                              Stainless steel
                                                                                 Clamped
GDRD85       Health           Stainless steel               PTFE                                 23 dBi
                                                                                 connection
                              Plastic / Aluminium alloy /   Aluminium+PP,
GDRD87       Solid                                                               Flange          34 dBi
                              Stainless steel               316L+PTFE / PP
GDRD88       Protection       PA66                          PP                   Hanging         23 dBi
GDRD89       Marine           Stainless steel               316L+PTFE            Flange          32 dBi
Note: The products are made up of electronic part, housing part, process connection part, installation
accessories part and antenna. All electronic parts including RF circuit are same within these models, and
differences of other parts such as Shell Material, Installation method etc. can not affect RF performance of the
product. Only the differences of antennas can affect the RF performance and we selected the sample with the
largest antenna gain for all RF testing. The following table is the information of our RF test sample.
Model No.       Shell material       Antenna Material                  Installation             Max. Antenna Gain
GDRD87          Stainless steel      316L+PP                           Flange                   34 dBi




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2.2. Test Mode
The engineer test sample was provided by the manufacturer, it was configured into continuous
transmit status after power on.



2.3. EMI Suppression Device(s)/Modifications
No EMI suppression device(s) were added and/or no modifications were made during testing.



2.4. Labeling Requirements
Per 2.1074 & 15.19; Docket 95-19
The label shall be permanently affixed at a conspicuous location on the device; instruction manual or
pamphlet supplied to the user and be readily visible to the purchaser at the time of purchase.
However, when the device is so small wherein placement of the label with specified statement is not
practical, only the FCC ID must be displayed on the device per Section 15.19(a)(5). Please see
attachment for FCC ID label and label location.




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3.      DESCRIPTION of TEST
3.1. Evaluation Procedure
The measurement procedures described in the American National Standard for Testing Unlicensed
Wireless Devices (KDB890966 D01 Meas level Probing Radars v01r01), and the requirement
provided in FCC Part 15.256 were used in the measurement of the EUT.
Deviation from measurement procedure…………………………….....................................None



3.2. AC Line Conducted Emissions
The line-conducted facility is located inside an 8'x4'x4' shielded enclosure. A 1m x 2m wooden table
80cm high is placed 40cm away from the vertical wall and 80cm away from the sidewall of the
shielded room. Two 10kHz-30MHz, 50Ω/50uH Line-Impedance Stabilization Networks (LISNs) are
bonded to the shielded room floor. Power to the LISNs is filtered by external high-current
high-insertion loss power line filters. These filters attenuate ambient signal noise from entering the
measurement lines. These filters are also bonded to the shielded enclosure.
The EUT is powered from one LISN and the support equipment is powered from the second LISN.
All interconnecting cables more than 1 meter were shortened to a 1 meter length by non-inductive
bundling (serpentine fashion) and draped over the back edge of the test table. All cables were at
least 40cm above the horizontal reference ground-plane. Power cables for support equipment were
routed down to the second LISN while ensuring that that cables were not draped over the second
LISN.
Sufficient time for the EUT, support equipment, and test equipment was allowed in order for them to
warm up to their normal operating condition. The RF output of the LISN was connected to the
receiver and exploratory measurements were made to determine the frequencies producing the
maximum emission from the EUT. The receiver was scanned from 150kHz to 30MHz. The detector
function was set to peak mode for exploratory measurements while the bandwidth of the analyzer
was set to 9kHz. The EUT, support equipment, and interconnecting cables were arranged and
manipulated to maximize each emission. Each emission was also maximized by varying: power lines,
the mode of operation or data exchange speed, or support equipment whichever determined the
worst-case emission. Once the worst case emissions have been identified, the one EUT cable
configuration/arrangement and mode of operation that produced these emissions are used for final
measurements on the same test site. The analyzer is set to CISPR quasi-peak and average
detectors with a 9kHz resolution bandwidth for final measurements.
An extension cord was used to connect to a single LISN which powered by EUT. The extension cord
was calibrated with LISN, the impedance and insertion loss are compliance with the requirements as
stated in ANSI C63.10-2013.




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3.3. Radiated Emissions
The radiated test facilities consisted of an indoor 3 meter semi-anechoic chamber used for final
measurements and exploratory measurements, when necessary. The measurement area is
contained within the semi-anechoic chamber which is shielded from any ambient interference. For
measurements above 1GHz absorbers are arranged on the floor between the turn table and the
antenna mast in such a way so as to maximize the reduction of reflections. For measurements below
1GHz, the absorbers are removed. A MF Model 210SS turntable is used for radiated measurement.
It is a continuously rotatable, remote controlled, metallic turntable and 2 meters (6.56 ft.) in diameter.
The turn table is flush with the raised floor of the chamber in order to maintain its function as a
ground plane. An 80cm high PVC support structure is placed on top of the turntable.
For all measurements, the spectrum was scanned through all EUT azimuths and from 1 to 4 meter
receive antenna height using a broadband antenna from 30MHz up to the upper frequency shown in
15.33(b)(1) depending on the highest frequency generated or used in the device or on which the
device operates or tunes. For frequencies above 1GHz, linearly polarized double ridge horn
antennas were used. For frequencies below 30MHz, a calibrated loop antenna was used. When
exploratory measurements were necessary, they were performed at 1 meter test distance inside the
semi-anechoic chamber using broadband antennas, broadband amplifiers, and spectrum analyzers
to determine the frequencies and modes producing the maximum emissions. Sufficient time for the
EUT, support equipment, and test equipment was allowed in order for them to warm up to their
normal operating condition. The test set-up for frequencies below 1GHz was placed on top of the 0.8
meter high, 1 x 1.5 meter table; and test set-up for frequencies 1-40GHz was placed on top of the 1.5
meter high, 1 x 1.5 meter table. The EUT, support equipment, and interconnecting cables were
arranged and manipulated to maximize each emission. Appropriate precaution was taken to ensure
that all emissions from the EUT were maximized and investigated. The system configuration, clock
speed, mode of operation or video resolution, if applicable, turntable azimuth, and receive antenna
height was noted for each frequency found.
Final measurements were made in the semi-anechoic chamber using calibrated, linearly polarized
broadband and horn antennas. The test setup was configured to the setup that produced the worst
case emissions. The spectrum analyzer was set to investigate all frequencies required for testing to
compare the highest radiated disturbances with respect to the specified limits. The turntable
containing the EUT was rotated through 360 degrees and the height of the receive antenna was
varied 1 to 4 meters and stopped at the azimuth and height producing the maximum emission. Each
emission was maximized by changing the orientation of the EUT through three orthogonal planes
and changing the polarity of the receive antenna, whichever produced the worst-case emissions.
According to 3dB Beam-Width of horn antenna, the horn antenna should be always directed to the
EUT when rising height.




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4.    ANTENNA REQUIREMENTS
Excerpt from §15.203 of the FCC Rules/Regulations:
“An intentional radiator antenna shall be designed to ensure that no antenna other than that
furnished by the responsible party can 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 antenna of the 80G Radar Level Meter is permanently attached.
    There are no provisions for connection to an external antenna.


Conclusion:
The unit complies with the requirement of §15.203.




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5.     TEST EQUIPMENT CALIBRATION DATE
Radiated Emission - AC1
Instrument                      Manufacturer   Type No.      Asset No.    Cali. Interval Cali. Due Date

EMI Test Receiver               R&S            ESR7          MRTSUE06001 1 year         2019/08/14
Signal Analyzer                 R&S            FSV40         MRTSUE06218 1 year         2019/04/20
EXA Signal Analyzer             Keysight       N9010B        MRTSUE06452 1 year         2019/07/20
Loop Antenna                    Schwarzbeck    FMZB 1519     MRTSUE06025 1 year         2019/11/09
Bilog Period Antenna            Schwarzbeck    VULB 9168     MRTSUE06172 1 year         2019/04/12
Broad-Band Horn Antenna         Schwarzbeck    BBHA9120D     MRTSUE06023 1 year         2019/10/20
Broad Band Horn Antenna         Schwarzbeck    BBHA 9170     MRTSUE06024 1 year         2019/12/17
Micro-Wave Antenna              MI-WWAVE       261U-25       MRTSUE06273 N/A            N/A
Micro-Wave Antenna              MI-WWAVE       261E-25       MRTSUE06276 N/A            N/A
Micro-Wave Antenna              MI-WWAVE       261F-25       MRTSUE06275 N/A            N/A
Micro-Wave Antenna              MI-WWAVE       261G          MRTSUE06274 N/A            N/A
RF Signal Generator             Keysight       E8257D        MRTSUE06453 N/A            N/A
Millimeter wave signal source
                                Keysight       E8257DV15     MRTSUE06456 N/A            N/A
frequency expander
Millimeter wave signal source
                                Keysight       E8257DV10     MRTSUE06458 N/A            N/A
frequency expander
USB wideband power sensor Keysight             U8489A        MRTSUE06448 1 year         2019/07/24
Standard Gain Horn Antenna A-INFOMW            LB-10-25-A    MRTSUE06410 N/A            N/A
Standard Gain Horn Antenna A-INFOMW            LB-15-25-A    MRTSUE06409 N/A            N/A
Waveguide Harmonic Mixer        Keysight       M1970V        MRTSUE06271 N/A            N/A
Waveguide Harmonic Mixer        Keysight       M1970W        MRTSUE06272 N/A            N/A
SA Extension Module             Keysight       N9029AV06     MRTSUE06368 N/A            N/A
SA Extension Module             Keysight       N9029AV05     MRTSUE06367 N/A            N/A
Microwave System Amplifier Agilent             83017A        MRTSUE06076 1 year         2019/11/16
Hygrothermograph                Testo          608-H1        MRTSUE06403 1 year         2019/08/15
Anechoic Chamber                TDK            Chamber-AC1   MRTSUE06212 1 year         2019/05/02




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Conducted Emissions - SR2

Instrument                  Manufacturer Type No.        Asset No.       Cali. Interval Cali. Due Date
EMI Test Receiver           R&S               ESR3       MRTSUE06185     1 year          2019/04/20
Two-Line V-Network          R&S               ENV216     MRTSUE06002     1 year          2019/06/15
Two-Line V-Network          R&S               ENV216     MRTSUE06003     1 year          2019/06/15
Thermohygrometer            Testo             608-H1     MRTSUE06404     1 year          2019/08/14
Shielding Anechoic Chamber MIX-BEP            Chamber-SR2 MRTSUE06214    N/A             N/A


Software                            Version                          Function
e3                                  v 8.3.5                          EMI Test Software




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6.   MEASUREMENT UNCERTAINTY
Where relevant, the following test uncertainty levels have been estimated for tests performed on the
EUT 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.


Radiated Emission Measurement - AC1
Measuring Uncertainty for a Level of Confidence of 95% (U=2Uc(y)):
9kHz ~ 1GHz: 4.18dB
1GHz ~ 18GHz: 4.76dB
AC Conducted Emission Measurement - SR2
Measuring Uncertainty for a Level of Confidence of 95% (U=2Uc(y)):
150kHz~30MHz: ± 3.46dB




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7.     TEST RESULT
7.1. Summary
Company Name:                 Beijing GODA Instruments Co., LTD.
FCC ID:                       2ACSOGDRD87


 FCC Part             Test Description            Test Limit                 Test         Test      Reference
 Section(s)                                                               Condition      Result
                 Fundamental             Within the frequency band
15.256(f)                                                                                 Pass      Section 7.2
                 Bandwidth               75-85GHz
                 Fundamental                                              Radiated
15.256(g)                                Refer to Section 7.3                             Pass      Section 7.3
                 Emissions
15.256(h)        Unwanted Emissions      < FCC 15.209 limits                              Pass      Section 7.4
15.256(i)(B)     Antenna
                                         Refer to Section 7.5                 --          Pass      Section 7.5
15.256(j)        Requirements
15.255(f)(2)                             Within the frequency band
                 Frequency stability                                      Radiated        Pass      Section 7.6
15.215(c)                                75-85GHz
                 AC Conducted
                                                                             Line
15.207           Emissions               < FCC 15.207 limits                               N/A      Section 7.7
                                                                         Conducted
                 150kHz - 30MHz
Notes:
1. The radiation measurements are performed in X, Y, Z axis positioning. Only the worst case data is shown
     in the report.
2. “N/A” means that the test item is not applicable, and the detailed information refers to relevant section.




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7.2. Fundmental Bandwidth

7.2.1. Test Limit

The fundamental bandwidth of an LPR emission is defined as the width of the signal between two
points, one below and one above the center frequency, outside of which all emissions are attenuated
by at least 10 dB relative to the maximum transmitter output power when measured in an equivalent
resolution bandwidth.

(1) The minimum fundamental emission bandwidth shall be 50 MHz for LPR operation under the
provisions of this section.
(2) LPR devices operating under this section must confine their fundamental emission bandwidth

within the 75-85 GHz bands under all conditions of operation.

7.2.2. Test Procedure used

KDB890966 D01 Meas level Probing Radars v01r01 Section D.

7.2.3. Test Setting

1. Observe fundamental emission on the spectrum analyzer with a peak detector, 1 MHz RBW and
   at least 3 MHz VBW.
2. Activate any frequency sweep, step or hop function of the EUT and select “Max Hold” function
   on the spectrum analyzer.
3. Perform multiple sweeps until the amplitude stabilizes.
4. Determine the 10 dB emission bandwidth.

7.2.4. Test Setup




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7.2.5. Test Result

Product                80G Radar Level Meter          Temperature           24°C
Test Engineer          Vincent Yu                     Relative Humidity     54%
Test Site              AC1                            Test Date             2019/02/18


                         10dB Bandwidth                                            Limit
            FL (GHz)                         76.3851                           >75 GHz
            FH (GHz)                         80.8676                           <85 GHz
       Bandwidth (GHz)                       4.4825                            >50 MHz
                             Result                                                Pass


                                          10dB Bandwidth




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7.3. Fundamental Emissions

 7.3.1. Test Limit

                                      LPR EIRP Emission Limits
   Frequency band of             Average emission limit                    Peak emission limit
       operation            (EIRP in dBm measured in 1 MHz)        (EIRP in dBm measured in 50 MHz)
      75 ~ 85GHz                             -3                                      34
Note: For a RBW less than 50 MHz, the peak EIRP limit (in dBm) is reduced by 20 log(RBW/50) dB
where RBW is the resolution bandwidth in megahertz. For FMCW modulation the correction should not
be applied since these signals are narrowband signals with full power within the resolution bandwidth
of the SA.

 7.3.2. Test Procedure used

KDB890966 D01 Meas level Probing Radars v01r01 Section F.
TR14-1007 Measurement of FMCW

 7.3.3. Test Setting

1. For radiated emission measurements, locate the receive test antenna at a far field distance
    boresighted on the LPR transmit antenna. Adjust the LPR and the test antenna for maximum
    main beam coupling.
2. Set the spectrum analyzer frequency span to enable viewing the entire sweep frequency span of
    the LPR signal.

3. Set the spectrum analyzer frequency span to enable viewing the entire sweep frequency span of
    the LPR signal.
4. Calculate the dwell time, TD, of the sweep frequency signal per MHz of the sweep frequency

    span
                                                  TD = TS/ΔF
    Where:

    TS is the signal sweep frequency time in seconds
    ΔF is the signal sweep frequency span in MHz
5. Set the detector to peak mode.

6. Set the RBW to 1 MHz.
7. Perform sufficient multiple scans on the spectrum analyzer in maximum hold with a sweep time
    suitable for displaying the variation in the signal level over the frequency span.

8. Record the maximum signal level. This is the peak value of the LPR signal.
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9. Calculate the average factor
                                  Average factor = (TD) / cycle time
   Where:
   Cycle time is the total time for a complete cycle of the signal including retrace and any other
   latency times.
10. Determine the average by multiplying the maximum signal level obtained in Step 8 by the
   average factor.


According to the manufacturer’s declaration, the parameter of the FMCW modulation as below:
     Chirp Bandwidth (ΔF)            Frequency sweep time (TS)                   Cycle time
             4GHz                              165us                               185us

Therefore:
TD = TS/ΔF = 0.04125us/MHz
Average factor = 10*log[(TD) / cycle time] = 10*log(0.04125/185) = -36.52 (dB)

7.3.4.Test Setup




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7.3.5.Test Results

Product               80G Radar Level Meter        Temperature              23°C
Test Engineer         Vincent Yu                   Relative Humidity        54%
Test Site             AC1                          Test Date                2019/02/13


 Frequency      Average Factor        EIRP (dBm)                     Limit (dBm)              Result
   (GHz)             (dB)          Peak       Average          Peak          Average
    80              -36.52         22.20      -14.32            34                 -3          Pass
Note: Average EIRP (dBm) = Peak EIRP (dBm) + Average Factor (dB)


                                           Peak EIRP




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7.4. Unwanted Emissions

7.4.1. Test Limit

Unwanted emissions from LPR devices shall not exceed the general emission limit in §15.209.
                                        FCC Part 15.209 Limit
       Frequency (MHz)                   Field Strength (uV/m)         Measurement Distance (m)
         0.009 ~ 0.490                       2400/F(kHz)                           300
         0.490 ~ 1.705                       24000/F(kHz)                          30
         1.705 ~ 30.0                               30                             30
            30 ~ 80                              100**                              3
           80 ~ 216                              150**                              3
           216 ~ 960                             200**                              3
          Above 960                                 500                             3
Note 1: The lower limit shall apply at the transition frequency.
Note 2: Distance refers to the distance in meters between the measuring instrument antenna and the
closed point of any part of the device or system.
Note 3: E field strength (dBuV/m) = 20 log E field strength (uV/m).
Note 4: The provisions in §15.35(b) and (c) of this part that require emissions to be averaged over a
100 millisecond period and that limits the peak power to 20 dB above the average limit do not apply
to devices operating under paragraphs (a) through (l) of §15.256.

7.4.2. Test Procedure used

KDB890966 D01 Meas level Probing Radars v01r01 Section D.
ANSI C63.10 Section 6.3 to 6.6

7.4.3. Test Procedure

Measurement of harmonic and spurious emissions below 40 GHz
 1. Analyzer center frequency was set to the frequency of the radiated spurious emission of interest
 2. RBW = as specified in Table 1
 3. VBW ≥ 3 x RBW
 4. Detector: The emission limits shown in the above table are based on measurements employing
    a CISPR quasi-peak detector except for the frequency bands 9-90 kHz, 110-490 kHz and above
    1000 MHz. Radiated emission limits in these three bands are based on measurements
    employing an average detector.
 5. Sweep time = auto couple
 6. Trace mode = max hold, trace was allowed to stabilize

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Measurement of harmonic and spurious emissions above 40 GHz
1.   Connect the test antenna covering the appropriate frequency range to a spectrum analyzer via
an external mixer.
2.   Set spectrum analyzer RBW = 1MHz, VBW = 3MHz, average detector.
3.   Maximize all observed emissions. Note the maximum power indicated on the spectrum analyzer.
Adjust this reading, if necessary, by the conversion loss of the external mixer used at the frequency
under investigation and the external mixer IF cable loss.

4.   Calculate the maximum field strength of the emission at the measurement distance
5.   Repeat the preceding sequence for every emission observed in the frequency band under
investigation.
                              Table 1 - RBW as a function of frequency

                     Frequency                                            RBW
                     9 ~ 150 kHz                                      200 ~ 300 Hz
                 0.15 ~ 30 MHz                                         9 ~ 10 kHz
                 30 ~ 1000 MHz                                       100 ~ 120 kHz
                     > 1000 MHz                                          1 MHz

7.4.4.Test Setup

30MHz ~ 1GHz Test Setup:




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                           Report No.: 1901RSU029-U1



1GHz ~ 40GHz Test Setup:




Above 40GHz Test Setup:




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                                                                                  Report No.: 1901RSU029-U1



 7.4.5.Test Result

 Product                80G Radar Level Meter               Temperature             23°C
 Test Engineer          Vincent Yu                          Relative Humidity       54%
 Test Site              AC1                                 Test Date               2019/01/29
 Test Range             Below 40GHz


  Frequency      Reading Level       Factor   Measure Level         Limit       Margin     Detector Polarization
    (MHz)           (dBμV)           (dB)        (dBμV/m)        (dBμV/m)        (dB)

    720.2            12.7            22.4          35.1             46.0        -10.9        QP      Horizontal
    760.4            19.0            22.9          41.9             46.0         -4.1        QP      Horizontal
    840.4            15.6            23.7          39.3             46.0         -6.7        QP      Horizontal
    920.5            13.4            24.7          38.1             46.0         -7.9        QP      Horizontal
    560.1             6.9            19.7          26.6             46.0        -19.4        QP       Vertical
    760.4            11.6            22.9          34.5             46.0        -11.5        QP       Vertical
    840.4            10.0            23.7          33.7             46.0        -12.3        QP       Vertical
    890.4            12.5            24.3          36.8             46.0         -9.2        QP       Vertical
    1119.0           36.8             -5.4         31.4             54.0        -22.6        AV      Horizontal
    2215.5           30.7             -0.6         30.1             54.0        -23.9        AV      Horizontal
    5207.5           26.8             6.4          33.2             54.0        -20.8        AV      Horizontal
    8012.5           26.2            13.7          39.9             54.0        -14.1        AV      Horizontal
    1365.5           40.7             -3.9         36.8             54.0        -17.2        AV       Vertical
    2283.5           38.5             -0.5         38.0             54.0        -16.0        AV       Vertical
    4706.0           34.8             5.5          40.3             54.0        -13.7        AV       Vertical
    8786.0           33.4            13.3          46.7             54.0         -7.3        AV       Vertical
   18055.0           25.9             8.4          34.3             54.0        -19.7        AV      Horizontal
   26668.0           23.9            12.3          36.2             54.0        -17.8        AV      Horizontal
   30573.0           25.8            12.1          37.9             54.0        -16.1        AV      Horizontal
   34456.0           24.2            14.6          38.8             54.0        -15.2        AV      Horizontal
   18077.0           24.9             8.5          33.4             54.0        -20.6        AV       Vertical
   19936.0           25.9             7.9          33.8             54.0        -20.2        AV       Vertical
   26690.0           23.1             11.7         34.8             54.0        -19.2        AV       Vertical
   34005.0           23.2            14.1          37.3             54.0        -16.7        AV       Vertical
Note: Measure Level (dBμV/m) = Reading Level (dBμV) + Factor (dB)
Factor (dB) = Cable Loss (dB) + Antenna Factor (dB/m) - Pre_Amplifier Gain (dB)




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                                                                               Report No.: 1901RSU029-U1


Product                  80G Radar Level Meter             Temperature           23°C
Test Engineer            Vincent Yu                        Relative Humidity     54%
Test Site                AC1                               Test Date             2019/03/01
Test Range               Above 40GHz


Frequency Reading Level        Factor   Measure Level    Measure       Limit   Margin     Detector   Result
  (GHz)         @ 0.5m          (dB)       @ 0.5m       Level @ 3m (dBμV/m)     (dB)
                (dBμV)                    (dBμV/m)       (dBμV/m)

   40.2          9.5           44.6         54.1           38.5        54.0    -15.5         AV      Pass
   41.6          11.0          44.9         55.9           40.3        54.0    -13.7         AV      Pass
   45.7          12.1          45.2         57.3           41.7        54.0    -12.3         AV      Pass
   49.1          14.0          45.8         59.8           44.2        54.0     -9.8         AV      Pass
   50.4          24.0          41.1         65.1           49.5        54.0     -4.5         AV      Pass
   134.5         4.9           57.4         62.3           46.7        54.0     -7.3         AV      Pass
   164.9         4.3           60.0         64.3           48.7        54.0     -5.3         AV      Pass
   194.3         3.9           61.4         65.3           49.7        54.0     -4.3         AV      Pass
Note:
1. Measure Level @ 0.5m = Reading Level @0.5m + Factor
Factor (dB) = Cable Loss (dB) + Antenna Factor (dB/m) + Mixer Conversion Loss (dB)
2. Measure Level @ 3m = Measure Level @ 0.5m + 20 * log(0.5m / 3m)




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                                                                            Report No.: 1901RSU029-U1



7.5. Antenna Requirements

7.5.1. Test Limit

 1. Antenna beamwidth: LPR devices operating under the provisions of this section within the 75-85
      GHz band must use an antenna with a -3 dB beamwidth no greater than 8 degrees.
 2. Antenna side lobe gain: LPR devices operating under the provisions of this section must limit
      the side lobe antenna gain relative to the main beam gain for off-axis angles from the main

      beam of greater than 60 degrees to the levels provided in below table.
                                   Antenna Side Lobe Gain Limit
      Frequency range (GHz)            Antenna sidelobe gain limit relative to main beam gain (dB)
             75 ~ 85                                               -38

7.5.2. Test Procedure used

The antenna parameters of the LPR are declared by the manufacturer. No test needs to be
conducted.

7.5.3. Test Setting
N/A

7.5.4. Test Setup
N/A

7.5.5. Test Result
According to the declaration of manufacturer, the parameter of the antennas is shown as below
table:
 Model No.     Max. Side lobe gain (dB)    Max. Beamwidth Antenna Side Lobe          Max. Beamwidth
                                                  (°)           Gain Limit (dB)          Limit (°)
 GDRD81                  -45.2                     6                  -38                    8
 GDRD82                  -45.8                     6                  -38                    8
 GDRD83                  -39.1                     8                  -38                    8
 GDRD84                  -53.1                     3                  -38                    8
 GDRD85                  -45.6                     6                  -38                    8
 GDRD87                  -55.2                     3                  -38                    8
 GDRD88                  -46.1                     6                  -38                    8
 GDRD89                  -52.9                     3                  -38                    8


Therefore, it complies with the antenna requirement.


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7.6. Frequency Stability

7.6.1.Test Limit

1.   As specified in Section 15.256(f)(2), LPR devices operating under this section must confine their
     fundamental emission bandwidth within the 75-85 GHz bands under all conditions of operation.
2.   As specified in Section 15.215(c), the bandwidth of the fundamental emission must be contained
     within the frequency band over the temperature range -20 to +50 degrees Celsius with an input
     voltage variation of 85% to 115% of rated input voltage. Frequency stability is to be measured

     according to Section 2.1055 at the highest and lowest frequency of operation and with the
     modulation that produces the widest emission bandwidth.

7.6.2.Test Procedure used

ANSI C63.10 Section 6.8

7.6.3.Test Procedure

1.   Arrange EUT and test equipment according Section 7.6.4.
2.   With the EUT at ambient temperature (20 °C) and voltage source set to the EUT nominal
operating voltage (24VDC, 100%)
3.   RBW = 1MHz, VBW = 3MHz
4.   Detector = Peak
5.   Trace Mode = Max Hold
6.   Record the Low and high frequencies (fL and fH) of the fundamental frequency emission which is
defined as the width of the signal between two points, one below and one above the center
frequency, outside of which all emissions are attenuated by at least 10 dB relative to the maximum
transmitter output power.
7.   Vary EUT power supply between 85% and 115% of nominal, and record the frequency

excursion of the EUT emission mask.
8.   Set the power supply to 100% nominal setting, and raise EUT operating temperature to 50 °C.
9.   Record the fL and fH of the fundamental frequency emission.
10. Repeat step 9 at each 10°C increment down to -20 °C.




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Spectrum           Lou
                 Euold
Analyzer




           Variable power Supply


                                                                Report No.: 1901RSU029-U1



7.6.5.Test Result

Test Engineer         Vincent Yu                Temperature         -20 ~ 50°C
Test Time             2019/02/18 ~ 2019/02/20   Relative Humidity   52%RH
Test Mode             Mode 1                    Test Site           TR3


 Voltage    Power      Temp            fL            fH              Limit         Result
  (%)       (VDC)      (℃)           (GHz)         (GHz)             (GHz)
                       - 20         76.3842       80.8683           75 ~ 85         Pass
                       - 10         76.3844       80.8681           75 ~ 85         Pass
                         0          76.3845       80.8682           75 ~ 85         Pass
                       + 10         76.3847       80.8679           75 ~ 85         Pass
 100%       24.0
                    + 20 (Ref)      76.3851       80.8676           75 ~ 85         Pass
                       + 30         76.3851       80.8673           75 ~ 85         Pass
                       + 40         76.3852       80.8675           75 ~ 85         Pass
                       + 50         76.3855       80.8676           75 ~ 85         Pass
 115%       27.6       + 20         76.3852       80.8677           75 ~ 85         Pass
  85%       20.4       + 20         76.3851       80.8678           75 ~ 85         Pass




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7.7. AC Conducted Emissions Measurement

7.7.1.Test Limit

                                          FCC 15.207 Limits
       Frequency (MHz)                        QP (dBuV)                        AV (dBuV)
          0.15 ~ 0.50                           66 ~ 56                         56 ~ 46
           0.50 ~ 5.0                              56                              46
            5.0 ~ 30                               60                              50
Note 1: The lower limit shall apply at the transition frequencies.
Note 2: The limit decreases linearly with the logarithm of the frequency in the range 0.15MHz to
0.5MHz.



7.7.2.Test Setup




7.7.3.Test Result
The EUT is powered by DC source, so this requirement doesn’t apply.




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8.   CONCLUSION
The data collected relate only the item(s) tested and show that the 80G Radar Level Meter is in
compliance with Part 15C of the FCC Rules.




                                             The End

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                                     Report No.: 1901RSU029-U1



Appendix A - Test Setup Photograph
Refer to “1901RSU029-UT” file.




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                                 Report No.: 1901RSU029-U1



Appendix B - EUT Photograph
Refer to “1901RSU029-UE” file.




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Document Created: 2019-04-11 05:03:36
Document Modified: 2019-04-11 05:03:36

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