ETR2201780-03 900MHz TxRx

Chamberlain Group Inc, The 0458X2 MyQ - Garage Door Opener HBW0458X2 HBW0458X2 0458x2

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Engineering Test Report No. 2201780-03

Report Date Manufacturer Name Manufacturer Address Test Item Name Model No. Date Received Test Dates
Specifications
Test Facility

June 7, 2022

Chamberlain

300 Windsor Dr Oak Brook, IL 60523 Phoenix AC GDO Logic Board 003-0458-5

April 26, 2022

April 27, 2022 ­ May 25, 2022

FCC "Code of Federal Regulations" Title 47, Part 15, Subpart B

FCC "Code of Federal Regulations" Title 47 Part 15, Subpart C, Section 15.247

Innovation, Science, and Economic Development Canada, RSS-GEN

Innovation, Science, and Economic Development Canada, RSS-247

Elite Electronic Engineering, Inc.

FCC Reg. Number: 269750

1516 Centre Circle,

IC Reg. Number: 2987A

Downers Grove, IL 60515

CAB Identifier: US0107

Signature

Tested by

Nathaniel Bouchie

Signature

Approved by

Raymond J. Klouda, Registered Professional Engineer of Illinois ­ 44894

PO Number

4900083434

This report is for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence, provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents.

This report shall not be reproduced, except in full, without the written approval of Elite Electronic Engineering Inc.

Elite Electronic Engineering Incorporated certifies that the information contained in this report was obtained under conditions which meet or exceed those specified in the FCC "Code of Federal Regulations" Title 47 Part 15, Subpart C, Section 15.247 and Innovation, Science, and Economic Development Canada, RSS-247 test specifications. The data presented in this test report pertains to the EUT on the test dates specified. Any electrical or mechanical modifications made to the EUT subsequent to the specified test date will serve to invalidate the data and void this certification. This report must not be used to claim product certification, approval, or endorsement by A2LA, NIST, or any agency of the Federal Government.

Engineering Test Report No. 2201780-03
Table of Contents
1. Report Revision History ............................................................................................................................ 3 2. Introduction ............................................................................................................................................... 4 2.1. Scope of Tests .......................................................................................................................................... 4 2.2. Purpose ..................................................................................................................................................... 4 2.3. Identification of the EUTs .......................................................................................................................... 4 3. Power Input ............................................................................................................................................... 5 4. Grounding ................................................................................................................................................. 5 5. Support Equipment ................................................................................................................................... 5 6. Interconnect Leads.................................................................................................................................... 5 7. Modifications Made to the EUT ................................................................................................................. 5 8. Modes of Operation................................................................................................................................... 5 9. Test Specifications .................................................................................................................................... 6 10. Test Plan ................................................................................................................................................... 6 11. Deviation, Additions to, or Exclusions from Test Specifications ............................................................... 6 12. Laboratory Conditions ............................................................................................................................... 6 13. Summary ................................................................................................................................................... 7 14. Sample Calculations ................................................................................................................................. 7 15. Statement of Conformity ........................................................................................................................... 7 16. Certification ............................................................................................................................................... 8 17. Photographs of EUT.................................................................................................................................. 9 18. Equipment List ........................................................................................................................................ 11 19. Block Diagram of Test Setup .................................................................................................................. 12 20. Receiver Radiated Emissions ................................................................................................................. 13 21. Transmitter Conducted Emissions (AC Mains) ....................................................................................... 35 22. 20dB Bandwidth ...................................................................................................................................... 43 23. Occupied Bandwidth (99%) .................................................................................................................... 47 24. Carrier Frequency Separation.................................................................................................................51 25. Number of Carrier Channels ................................................................................................................... 53 26. Average Time of Occupancy...................................................................................................................55 27. Maximum Peak Conducted Output Power..............................................................................................58 28. Effective Isotropic Radiated Power (EIRP) ............................................................................................. 62 29. Duty Cycle Factor Measurements...........................................................................................................64 30. Case Spurious Radiated Emissions........................................................................................................68 31. Band Edge Compliance .......................................................................................................................... 82 32. Scope of Accreditation ............................................................................................................................ 88

This report shall not be reproduced, except in full, without the written approval of Elite Electronic Engineering Inc.

Page 2 of 96

Engineering Test Report No. 2201780-03

1. Report Revision History

Revision ­

Date 07 JUN 2022

Description Initial Release of Engineering Test Report No. 2201780-03

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Engineering Test Report No. 2201780-03

2. Introduction
2.1. Scope of Tests
This document presents the results of a series of RF emissions tests that were performed on the Chamberlain Phoenix AC GDO Logic Board (hereinafter referred to as the Equipment Under Test (EUT)). The EUTs were manufactured and submitted for testing by Chamberlain located in Oak Brook, IL.
2.2. Purpose
The test series was performed to determine if the EUT meets the RF emission requirements of the FCC "Code of Federal Regulations" Title 47, Part 15, Subpart B, §15.107 and §15.109 for Receivers and Subpart C, §15.247 for a Frequency Hopping Spread Spectrum intentional radiator operating within the 902 ­ 928MHz band.
The test series was also performed to determine if the EUT meets the RF emission requirements of the Innovation, Science, and Economic Development Canada Radio Standards Specification RSS-Gen and Innovation, Science, and Economic Development Canada Radio Standards Specification RSS-247 for a Frequency Hopping Spread Spectrum intentional radiator operating within the 902 ­ 928MHz band.

Testing was performed in accordance with ANSI C63.10-2013.

2.3. Identification of the EUTs
The EUTs were identified as follows:

Product Description Model/Part No. Serial No. Size of EUT
Software/Firmware Version
Device Type Band of Operation Modulation Type Antenna Type Antenna Gain (dBi) 1 Conducted Output Power 20dB Bandwidth Occupied Bandwidth (99% CBW) Emission Classification Product FCC ID & ISED ID Number
Product Description Model/Part No. Serial No. Size of EUT
Software/Firmware Version
Device Type

EUT Identification Test Item #1
Phoenix AC GDO Logic Board 003-0458-5 151220510865 3 in x 8 in x 1.5 in Realtek Wi-Fi/BLE= 126A0542-Realtek-Application Rev C.6 Sec+3.0 BLELR: Preliminary test image Rev 1 GDO Firmware: Motor Forever Run 126A0542-Silabs-Application Rev C.6 Frequency Hopping Transmission Device 902 ­ 928MHz GFSK Monopole -2 18.54dBm 139.9kHz
185.27kHz
185KF1D FCC ID: HBW0458X2 ISED ID: 2666A-0458X2
Test Item #2 Phoenix AC GDO Logic Board 85870 151220510793 3 in x 8 in x 1.5 in Realtek Wi-Fi/BLE= 126A0542-Realtek-Application Rev C.6 Sec+3.0 BLELR: Preliminary test image Rev 1 GDO Firmware: Motor Forever Run 126A0542-Silabs-Application Rev C.6 Frequency Hopping Transmission Device

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Engineering Test Report No. 2201780-03

Band of Operation

902 ­ 928MHz

Modulation Type

GFSK

Antenna Type

Monopole

Antenna Gain (dBi) 1

-2

Conducted Output Power

18.54dBm

20dB Bandwidth

139.9kHz

Occupied Bandwidth (99% CBW)

185.27kHz

Emission Classification

185KF1D

Product FCC ID & ISED ID FCC ID: HBW0458X2

Number

ISED ID: 2666A-0458X2

Note 1 ­ Antenna gain is supplied by the manufacturer and Elite is not responsible for the accuracy of the antenna gain.

The EUTs listed above were used throughout the test series. EUT #2 was used for Powerline Conducted Emissions tests, and EUT #1 was used for all others.

3. Power Input
The EUTs obtained 120V 60Hz power via a 3 wire, 1-meter, unshielded power cord.

4. Grounding
The EUTs were connected to ground through the third wire of its input power cord.

5. Support Equipment
The EUTs were submitted for testing along with the following support equipment:

Description

Model #

S/N

Motion Sensor

041-0136

n/a

Light Switch

880LMW

n/a

6. Interconnect Leads
The following interconnect cables were submitted with the test item:

Item Double Wire I/O Double Wire I/O

Description Connects Motion Sensor to EUT
Connects Light Switch to EUT

7. Modifications Made to the EUT
No modifications were made to the EUTs during the testing.
8. Modes of Operation
The EUTs and all peripheral equipment were energized. The units were programmed to transmit in one of the following modes:

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Engineering Test Report No. 2201780-03

Mode Tx Low @ 902.25MHz Tx Mid @ 914.75MHz Tx High @ 926.75MHz Rx Only @ 902.25MHz Rx Only @ 914.75MHz Rx Only @ 926.75MHz
Tx Hopping

Description Tx on at Ch0, 902.25MHz Tx on at Ch25. 914.75MHz Tx on at Ch49, 926.75MHz Rx Only at Ch0, 902.25MHz Rx Only at Ch25. 914.75MHz Rx Only at Ch49, 926.75MHz Tx Hopping in the 902 ­ 928MHz band

9. Test Specifications
The tests were performed to selected portions of, and in accordance with, the test specifications.

- Federal Communications Commission "Code of Federal Regulations", Title 47, Chapter I, Subchapter A, Part 15, Subpart B

- Federal Communications Commission "Code of Federal Regulations", Title 47, Chapter I, Subchapter A, Part 15, Subpart C

- ANSI C63.4-2014, "American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9kHz to 40GHz"

- ANSI C63.10-2013, "American National Standard of Procedures for Compliance Testing of Unlicensed Wireless Devices"

- Federal Communications Commission Office of Engineering and Technology Laboratory Division, Guidance For Compliance Measurements On Digital Transmission Systems, Frequency Hopping Spread Spectrum System, and Hybrid System Devices Operating Under Section 15.247 April 2, 2019 KDB 558074 D01v05r02

- RSS-Gen Issue 5, February 2020, Amendment 2, Innovation, Science, and Economic Development Canada, "General Requirements for Compliance of Radio Apparatus"

- RSS-247 Issue 2, February 2017, "Digital Transmission Systems (DTSs), Frequency Hopping Systems (FHSs) and License-Exempt Local Area Network (LE-LAN) Devices"

10. Test Plan
No test plan was provided. Instructions were provided by personnel from Chamberlain and used in conjunction with the FCC "Code of Federal Regulations" Title 47 Part 15, Subpart C, Section 15.247, Innovation, Science, and Economic Development Canada, RSS-247, and ANSI C63.4-2014 specifications.

11. Deviation, Additions to, or Exclusions from Test Specifications
There were no deviations, additions to, or exclusions from the test specifications during this test series.

12. Laboratory Conditions
The ambient parameters of the laboratory during testing were as follows:

Ambient Parameters Temperature
Relative Humidity Atmospheric Pressure

Value 22.8°C
18% 1024.5mb

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Engineering Test Report No. 2201780-03

13. Summary
The following EMC tests were performed, and the results are shown below:

Test Description

Requirements Test Method

Receiver Radiated Emissions

FCC 15.109 ANSI C63.4:2014
ISED RSS-GEN

Transmitter Conducted Emissions (AC FCC 15.207

ANSI C63.10:2013

Mains)

ISED RSS-GEN

20dB Bandwidth

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

Occupied Bandwidth (99%)

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

Carrier Frequency Separation

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

Number of Carrier Channels

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

Average Time of Occupancy

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

FCC 15.247

Maximum Peak Conducted Output Power

ANSI C63.10:2013

ISED RSS-247

FCC 15.247

Effective Isotropic Radiated Power (EIRP)

ANSI C63.10:2013

ISED RSS-247

Duty Cycle Factor Measurements

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

Case Spurious Radiated Emissions

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

Band Edge Compliance

FCC 15.247 ANSI C63.10:2013
ISED RSS-247

S/N 151220510865 151220510793 151220510865 151220510865 151220510865 151220510865 151220510865 151220510865 151220510865 151220510865 151220510865 151220510865

Results Conforms Conforms Conforms Conforms Conforms Conforms Conforms Conforms Conforms
 Conforms Conforms

14. Sample Calculations
For Powerline Conducted Emissions:
The resultant voltage level (VL) is a summation in decibels (dB) of the receiver meter reading (MTR) and the cable loss factor (CF).
Formula 1: VL (dBµV) = MTR (dBµV) + CF (dB).

For Radiated Emissions: The resultant field strength (FS) is a summation in decibels (dB) of the receiver meter reading (MTR), the antenna correction factor (AF), and the cable loss factor (CF). If an external preamplifier is used, the total is reduced by its gain (-PA). If a distance correction (DC) is required, it is added to the total.
Formula 1: FS (dBµV/m) = MTR (dBµV) + AF (dB/m) + CF (dB) + (- PA (dB)) + DC (dB)
To convert the Field Strength dBµV/m term to µV/m, the dBµV/m is first divided by 20. The Base 10 AntiLog is taken of this quotient. The result is the Field Strength value in µV/m terms.
Formula 2: FS (µV/m) = AntiLog [(FS (dBµV/m))/20]
15. Statement of Conformity
The Chamberlain Phoenix AC GDO Logic Board (Model No. 003-0458-5, Serial No. 151220510865 and 151220510793) did fully conform to the selected requirements of FCC "Code of Federal Regulations" Title 47 Part 15, Subpart C, Section 15.247 and Innovation, Science, and Economic Development Canada, RSS-247.
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Engineering Test Report No. 2201780-03
16. Certification
Elite Electronic Engineering Incorporated certifies that the information contained in this report was obtained under conditions which meet or exceed those specified in the FCC "Code of Federal Regulations" Title 47 Part 15, Subpart C, Section 15.247 and Innovation, Science, and Economic Development Canada, RSS-247 test specifications. The data presented in this test report pertains to the EUTs on the test date specified. Any electrical or mechanical modifications made to the EUTs subsequent to the specified test date will serve to invalidate the data and void this certification.
Page 8 of 96

17. Photographs of EUT

Engineering Test Report No. 2201780-03

Above Antenna Ports populated in final product. Pictured below is the complete GDO that the Phoenix Logic Board will sit inside.

Page 9 of 96

Engineering Test Report No. 2201780-03 Page 10 of 96

Engineering Test Report No. 2201780-03

18. Equipment List

Eq ID

Equipment Description

Manufacturer

Model No.

Serial No. Frequency Range Cal Date Due Date

APW0 PREAMPLIFIER

PLANAR ELECTRONICS PE2-30-20G20R6G PL2926/0646 20GHZ-26.5GHZ 9/21/2021 9/21/2022

CDX9 COMPUTER

ELITE

WORKSTATION

N/A

CDZ3 LAB WORKSTATION

ELITE

LWS-10

WINDOWS 10

CNR

CDZ4 LAB WORKSTATION

ELITE

LWS-10

WINDOWS 10

CNR

GCM0 SFC COMPACT MODULATOR ROHDE & SCHWARZ 2115.3510K02

100552

---

3/23/2022 3/23/2024

GRB0 1MHZ, LISN SIGNAL CHECKER

ELITE

LISNCHKR1M

1

1MHZ

6/17/2021 6/17/2023

GRE2 SIGNAL GENERATOR

AGILENT

E4438C

MY42081749 250KHZ-6GHZ 3/4/2022

3/4/2023

GSF0 VECTOR SIGNAL GENERATOR ROHDE & SCHWARZ

SMBV100A

260452

9kHz to 6GHz 8/24/2021 8/24/2022

GSFB OSP120 BASE UNIT

ROHDE & SCHWARZ

OSP120

101246

---

5/11/2021 5/11/2023

GSFE OSP120

ROHDE & SCHWARZ

OSP120

101288

.01-40GHZ

6/11/2021 6/11/2023

MEA3 NHG1 NSDS1 NTA4 NWQ0 NWQ1 NWQ2 PLF2

MICRO-OHM METER
STANDARD GAIN HORN ANTENNA UNIVERSAL SPHERICAL DIPOLE SOURCE
BILOG ANTENNA
DOUBLE RIDGED WAVEGUIDE ANTENNA DOUBLE RIDGED WAVEGUIDE ANTENNA DOUBLE RIDGED WAVEGUIDE ANTENNA
CISPR16 50UH LISN

KEITHLEY NARDA AET TESEQ
ETS LINDGREN ETS-LINDGREN ETS LINDGREN
ELITE

580 638 USDS-H 6112D 3117 3117 3117 CISPR16/70A

772667 ---

10UOHM-200KOHM 6/3/2021

18-26.5GHZ

NOTE 1

6/3/2022

AET-1116 46660 66657

20-2000GHZ 1GHZ-18GHZ

NOTE 1 10/5/2020 5/13/2020

10/5/2022 6/13/2022

66655

1GHZ-18GHZ 4/28/2020 5/28/2022

66659 002

1GHZ-18GHZ .15-30MHz

4/27/2022 4/5/2022

4/27/2024 4/5/2023

PLF4 CISPR16 50UH LISN

ELITE

CISPR16/70A

003

.15-30MHz

4/5/2022

4/5/2023

R14ML ROOM 14

ETS LINDGREN

14A

DC-DAYLIGHT

CNR

R21F 3M ANECHOIC CHAMBER NSA EMC TEST SYSTEMS 3M ANECHOIC

30MHZ-18GHZ 3/30/2022 3/30/2023

R29F 3M ANECHOIC CHAMBER NSA EMC TEST SYSTEMS 3M ANECHOIC

30MHZ-18GHZ 3/25/2022 3/25/2023

RBG0 EMI ANALYZER

ROHDE & SCHWARZ

ESW44

101533

10HZ-44GHZ 11/15/2021 11/15/2022

RBG2 EMI ANALYZER

ROHDE & SCHWARZ

ESW44

101591

2HZ-44GHZ

3/31/2022 3/31/2023

T1ED 10DB 25W ATTENUATOR

WEINSCHEL

46-10-34

BN2320

DC-18GHZ

1/6/2022

1/6/2024

T1EJ 10DB 25W ATTENUATOR

WEINSCHEL

46-10-34

CD6790

DC-18GHZ

1/12/2022 1/12/2024

T2D1 20DB, 25W ATTENUATOR

WEINSCHEL

46-20-43

AV5814

DC-18GHZ

1/18/2022 1/18/2024

VBR8 VBV2 WKA1

CISPR EN FCC CE VOLTAGE.exe
CISPR EN FCC ICES RE.EXE
SOFTWARE, UNIVERSAL RCV EMI

ELITE ELITE

CISPR EN FCC ---
ICES RE.EXE

UNIV_RCV_EMI

1

N/A

---

N/A

---

I/O

XLTK 5W, 50 OHM TERMINATION

JFW INDUSTRIES

50T-052

---

DC-2GHZ

1/5/2022

1/5/2024

N/A: Not Applicable

I/O: Initial Only

CNR: Calibration Not Required

NOTE 1: For the purpose of this test, the equipment was calibrated over the specified frequency range, pulse rate, or modulation prior to the test or monitored by a

calibrated instrument.

Page 11 of 96

19. Block Diagram of Test Setup

Engineering Test Report No. 2201780-03

Anechoic Ferrite Chamber
DUT

3 meters

Receive Antenna
Shielded Enclosure

Mast/Turn-Table Control
Spectrum Analyzer

Monitor Computer

Radiated Measurements Test Setup

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Engineering Test Report No. 2201780-03

20. Receiver Radiated Emissions

Manufacturer Product Model No. Serial No.
Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Rx Only @ 902.25MHz Rx Only @ 914.75MHz Rx Only @ 926.75MHz

Setup Format Height of Support Type of Test Site Test Site Used
Type of Antennas Used
Highest Internal Frequency Highest Measurement Frequency
Notes

Test Site Information Tabletop N/A Semi-Anechoic Chamber Room 21 Below 1GHz: Bilog (or equivalent) Above 1GHz: Double-ridged waveguide (or equivalent) 926.75MHz
5GHz
The cables were manually maximized during the preliminary emissions sweeps. The cable arrangement which resulted in the worst-case emissions was utilized.

Measurement Uncertainty
Measurement Type
Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (6 GHz ­ 18 GHz)

Expanded Measurement
Uncertainty 4.3
3.1
3.2

Requirements The field strength of radiated emissions from unintentional radiators at a distance of 3 meters shall not exceed the values in the following table.

Frequency of Emission (MHz) 30 ­ 88
88 ­ 216 216 ­ 960 Above 960
Frequency of Emission (MHz)
Above 1000

Radiated Emissions Limits (30MHz to 1GHz) Field Strength (µV/m) 100 150 200 500
Radiated Emissions Limits (Above 1GHz) Peak Limit (dBµV/m) 74

Field Strength (dBµV/m) 40 43.5 46 54
Average Limit (dBµV/m) 54

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Engineering Test Report No. 2201780-03

Procedure Since a quasi-peak detector and an average detector requires long integration times, it is not practical to automatically sweep through the quasi-peak and average levels. Therefore, radiated emissions from the EUT were first scanned using a peak detector and automatically plotted. The frequencies where significant emission levels were noted were then remeasured using the quasi-peak detector or average detector.

The EUT and all peripheral equipment were placed on an 80cm high non-conductive stand. The broadband measuring antenna was positioned at a 3-meter distance from the EUT. The frequency range from 30MHz to 1GHz was investigated using a peak detector function with the bilog antenna at several heights, horizontal and vertical polarization, and with several different orientations of the EUT with respect to the antenna. The frequency range from 1GHz to 5GHz was investigated using a peak detector function with the double ridged waveguide antenna at several heights, horizontal and vertical polarization, and with several different orientations of the EUT with respect to the antenna. The maximum levels for each antenna polarization were plotted.

Final radiated emissions were performed on all significant broadband and narrowband emissions found in the exploratory sweeps using the following methods:

1) Measurements from 30MHz to 1GHz were made using a quasi-peak detector and a broadband bilog antenna. Measurements above 1GHz were made using an average detector and a broadband double ridged waveguide antenna.

2) To ensure that maximum or worst case, emission levels were measured, the following steps were taken:

a)

The EUT was rotated so that all sides were exposed to the receiving antenna.

b)

Since the measuring antenna is linearly polarized, both horizontal and vertical field

components were measured.

c)

The measuring antenna was raised and lowered from 1 to 4 meters for each antenna

polarization to maximize the readings.

d)

For hand-held or body-worn devices, the EUT was rotated through three orthogonal

axes to determine which orientation produces the highest emission relative to the limit.

3) Steps (b) through (d) were repeated with the EUT operated in the Rx Only @ 914.75MHz mode. 4) Steps (b) through (d) were repeated with the EUT operated in the Rx Only @ 926.75MHzmode.

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Engineering Test Report No. 2201780-03
Test Setup for Radiated Emissions: 30MHz to 1GHz, Horizontal Polarization
Test Setup for Radiated Emissions: 30MHz to 1GHz, Vertical Polarization Page 15 of 96

Engineering Test Report No. 2201780-03
Test Setup for Radiated Emissions: 1GHz to 18GHz, Horizontal Polarization
Test Setup for Radiated Emissions: 1GHz to 18GHz, Vertical Polarization Page 16 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 902.25MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 12:21:52 PM

Peak

QP

QP

Ant

Amp

Cbl

Dist

Peak

QP

QP

Freq

Mtr

Mtr

Lim

Fac

Fac

Fac

Corr

Total

Total

Limit

MHz

Rdg

Rdg

Mrg

dB/m

dB

dB

dB

dBµV/m dBµV/m dBµV/m

dBuV dBuV

dB

Mast

Ant

Azim

Ht

Pol

°

cm

32.100

7.7

-2.7

23.7

0.0

0.5

0.0

31.9

21.5

40.0

-18.5 Horizontal 120

180

58.020

10.0

-7.2

12.7

0.0

0.5

0.0

23.2

6.0

40.0

-34.0 Horizontal 120

135

79.980

9.6

3.8

13.3

0.0

0.5

0.0

23.4

17.6

40.0

-22.4 Horizontal 200

0

90.040

11.0

-5.6

15.1

0.0

0.5

0.0

26.5

10.0

43.5

-33.5 Horizontal 200

180

100.000 13.2

9.9

16.8

0.0

0.5

0.0

30.5

27.2

43.5

-16.3

Vertical

120

180

106.960

9.9

-7.7

17.4

0.0

0.5

0.0

27.9

10.3

43.5

-33.2 Horizontal 340

180

121.060

8.5

-7.6

18.2

0.0

0.6

0.0

27.3

11.2

43.5

-32.3 Horizontal 340

225

240.000 10.1

5.6

17.3

0.0

1.0

0.0

28.4

23.9

46.0

-22.1 Horizontal 120

90

319.980 11.9

5.7

19.5

0.0

1.1

0.0

32.6

26.3

46.0

-19.7 Horizontal 120

45

799.980

7.9

2.3

26.0

0.0

2.0

0.0

35.9

30.3

46.0

-15.7 Horizontal 120

45

934.200

4.4

-7.8

26.9

0.0

2.0

0.0

33.3

21.1

46.0

-24.9

Vertical

200

135

Excessive QP
Level

Page 17 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 902.25MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Horizontal

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 12:21:52 PM

Page 18 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 902.25MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Vertical

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 12:21:52 PM

Page 19 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 914.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 01:25:08 PM

Peak

QP

QP

Ant

Amp

Cbl

Dist

Peak

QP

QP

Freq

Mtr

Mtr

Lim

Fac

Fac

Fac

Corr

Total

Total

Limit

MHz

Rdg

Rdg

Mrg

dB/m

dB

dB

dB

dBµV/m dBµV/m dBµV/m

dBuV dBuV

dB

Mast

Ant

Azim

Ht

Pol

°

cm

32.280

8.8

-2.4

23.6

0.0

0.5

0.0

32.9

21.7

40.0

-18.3 Horizontal 120

45

67.980

10.7

-1.8

12.5

0.0

0.5

0.0

23.7

11.2

40.0

-28.8

Vertical

200

315

79.980

10.8

5.7

13.3

0.0

0.5

0.0

24.6

19.5

40.0

-20.5

Vertical

120

225

81.900

11.6

-7.6

13.5

0.0

0.5

0.0

25.6

6.4

40.0

-33.6 Horizontal 200

270

101.020 13.6

-7.3

17.0

0.0

0.5

0.0

31.1

10.2

43.5

-33.3 Horizontal 120

315

137.020 12.8

-7.5

17.4

0.0

0.7

0.0

30.9

10.7

43.5

-32.8

Vertical

120

0

160.000 11.5

8.0

17.2

0.0

0.8

0.0

29.5

26.0

43.5

-17.5

Vertical

200

270

199.960

8.8

3.4

15.4

0.0

1.0

0.0

25.3

19.9

43.5

-23.7

Vertical

200

0

240.000 12.9

9.7

17.3

0.0

1.0

0.0

31.3

28.0

46.0

-18.0 Horizontal 120

225

319.980 11.5

7.8

19.5

0.0

1.1

0.0

32.1

28.5

46.0

-17.5

Vertical

200

225

400.020

9.3

4.9

21.8

0.0

1.5

0.0

32.7

28.3

46.0

-17.7

Vertical

120

180

799.980 10.4

6.1

26.0

0.0

2.0

0.0

38.4

34.2

46.0

-11.8 Horizontal 120

45

955.500

4.0

-8.5

27.1

0.0

2.0

0.0

33.1

20.6

46.0

-25.4 Horizontal 120

225

Excessive QP
Level

Page 20 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 914.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Horizontal

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 01:25:08 PM

Page 21 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 914.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Vertical

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 01:25:08 PM

Page 22 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 926_75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 01:54:21 PM

Peak

QP

QP

Ant

Amp

Cbl

Dist

Peak

QP

QP

Freq

Mtr

Mtr

Lim

Fac

Fac

Fac

Corr

Total

Total

Limit

MHz

Rdg

Rdg

Mrg

dB/m

dB

dB

dB

dBµV/m dBµV/m dBµV/m

dBuV dBuV

dB

Mast

Ant

Azim

Ht

Pol

°

cm

31.800

7.9

-3.0

23.9

0.0

0.5

0.0

32.2

21.4

40.0

-18.6 Horizontal 200

0

54.660

10.9

0.8

13.4

0.0

0.5

0.0

24.9

14.7

40.0

-25.3

Vertical

120

180

66.960

12.7

-1.1

12.4

0.0

0.5

0.0

25.6

11.8

40.0

-28.2

Vertical

120

45

79.980

12.9

9.1

13.3

0.0

0.5

0.0

26.7

22.8

40.0

-17.2

Vertical

200

270

100.000 12.6

8.8

16.8

0.0

0.5

0.0

29.9

26.2

43.5

-17.4

Vertical

120

270

119.980 10.7

-7.7

18.2

0.0

0.6

0.0

29.6

11.1

43.5

-32.4 Horizontal 120

0

160.000 11.6

7.8

17.2

0.0

0.8

0.0

29.6

25.8

43.5

-17.7

Vertical

120

45

200.020

8.1

2.8

15.4

0.0

1.0

0.0

24.5

19.2

43.5

-24.3

Vertical

120

0

240.000 10.8

5.0

17.3

0.0

1.0

0.0

29.1

23.3

46.0

-22.7 Horizontal 120

90

319.980 11.4

7.6

19.5

0.0

1.1

0.0

32.0

28.3

46.0

-17.7

Vertical

200

225

938.520

4.0

-7.8

26.9

0.0

2.0

0.0

33.0

21.2

46.0

-24.8

Vertical

200

0

Excessive QP
Level

Page 23 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 926_75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Horizontal

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 01:54:21 PM

Page 24 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 926_75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Vertical

Scan Type

: Stepped Scan

Test RBW

: 120 kHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 26, 2022 01:54:21 PM

Page 25 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 902.25MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 03:57:10 PM

Peak

Ant

Amp

Cbl

Freq

Mtr Rdg

Fac

Fac

Fac

MHz

dBuV

dB/m

dB

dB

Dist

Peak

Peak

Peak

Ant

Corr

Total

Limit

Lim Mrg

Pol

dB

dBµV/m dBµV/m

dB

Mast Ht cm

Azim °

1296.000

51.0

29.1

-41.8

2.4

0.0

40.7

74.0

-33.3

Horizontal

340

270

1704.500

49.3

29.5

-41.1

2.8

0.0

40.4

74.0

-33.6

Horizontal

340

270

2184.000

49.1

31.4

-40.6

3.2

0.0

43.1

74.0

-30.9

Horizontal

120

45

2826.500

49.3

32.4

-41.2

3.8

0.0

44.3

74.0

-29.7

Horizontal

200

0

3791.500

48.2

33.0

-40.4

4.4

0.0

45.3

74.0

-28.7

Horizontal

340

225

4776.500

48.2

34.5

-40.7

4.9

0.0

46.9

74.0

-27.1

Horizontal

340

180

Average

Ant

Amp

Cbl

Freq

Mtr Rdg

Fac

Fac

Fac

MHz

dBuV

dB/m

dB

dB

Dist

Average Average Average

Ant

Corr

Total

Limit

Lim Mrg

Pol

dB

dBµV/m dBµV/m

dB

Mast Ht cm

Azim °

1296.000

37.3

29.1

-41.8

2.4

0.0

27.0

54.0

-27.0

Horizontal

340

270

1704.500

35.9

29.5

-41.1

2.8

0.0

27.0

54.0

-26.9

Horizontal

340

270

2184.000

35.0

31.4

-40.6

3.2

0.0

28.9

54.0

-25.0

Horizontal

120

45

2826.500

35.5

32.4

-41.2

3.8

0.0

30.5

54.0

-23.5

Horizontal

200

0

3791.500

34.1

33.0

-40.4

4.4

0.0

31.1

54.0

-22.8

Horizontal

340

225

4776.500

34.2

34.5

-40.7

4.9

0.0

32.9

54.0

-21.1

Horizontal

340

180

Excessive Peak Level
Excessive Average
Level

Page 26 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 902.25MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Horizontal

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 03:57:10 PM

Page 27 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 902.25MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Vertical

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 03:57:10 PM

Page 28 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 914.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 04:25:30 PM

Peak

Ant

Amp

Cbl

Freq

Mtr Rdg

Fac

Fac

Fac

MHz

dBuV

dB/m

dB

dB

Dist

Peak

Peak

Peak

Ant

Corr

Total

Limit

Lim Mrg

Pol

dB

dBµV/m dBµV/m

dB

Mast Ht cm

Azim °

1270.000

51.1

29.1

-41.9

2.3

0.0

40.7

74.0

-33.3

Horizontal

120

225

1707.000

49.5

29.5

-41.1

2.8

0.0

40.7

74.0

-33.3

Horizontal

200

90

1921.000

50.2

31.2

-40.8

2.9

0.0

43.5

74.0

-30.4

Horizontal

340

315

2464.000

53.6

32.5

-41.2

3.5

0.0

48.4

74.0

-25.6

Horizontal

120

45

3465.500

48.4

32.9

-40.5

4.2

0.0

45.0

74.0

-28.9

Horizontal

200

0

4718.000

47.9

34.5

-40.7

4.9

0.0

46.5

74.0

-27.4

Vertical

340

45

Average

Ant

Amp

Cbl

Freq

Mtr Rdg

Fac

Fac

Fac

MHz

dBuV

dB/m

dB

dB

Dist

Average Average Average

Ant

Corr

Total

Limit

Lim Mrg

Pol

dB

dBµV/m dBµV/m

dB

Mast Ht cm

Azim °

1270.000

37.5

29.1

-41.9

2.3

0.0

27.1

54.0

-26.9

Horizontal

120

225

1707.000

35.7

29.5

-41.1

2.8

0.0

26.9

54.0

-27.1

Horizontal

200

90

1921.000

36.0

31.2

-40.8

2.9

0.0

29.4

54.0

-24.6

Horizontal

340

315

2464.000

35.8

32.5

-41.2

3.5

0.0

30.5

54.0

-23.5

Horizontal

120

45

3465.500

34.6

32.9

-40.5

4.2

0.0

31.2

54.0

-22.8

Horizontal

200

0

4718.000

34.3

34.5

-40.7

4.9

0.0

32.9

54.0

-21.1

Vertical

340

45

Excessive Peak Level
Excessive Average
Level

Page 29 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 914.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Horizontal

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 04:25:30 PM

Page 30 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 914.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Vertical

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 04:25:30 PM

Page 31 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 926.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 04:56:28 PM

Peak

Ant

Amp

Cbl

Freq

Mtr Rdg

Fac

Fac

Fac

MHz

dBuV

dB/m

dB

dB

Dist

Peak

Peak

Peak

Ant

Corr

Total

Limit

Lim Mrg

Pol

dB

dBµV/m dBµV/m

dB

Mast Ht cm

Azim °

1295.500

51.2

29.1

-41.8

2.4

0.0

40.9

74.0

-33.1

Horizontal

120

180

1669.000

49.0

29.0

-41.1

2.7

0.0

39.6

74.0

-34.4

Vertical

120

270

2235.000

48.6

31.4

-40.7

3.2

0.0

42.6

74.0

-31.4

Vertical

200

270

2681.500

51.2

32.6

-41.4

3.6

0.0

46.0

74.0

-28.0

Horizontal

340

180

3488.000

48.3

32.9

-40.5

4.2

0.0

45.0

74.0

-29.0

Horizontal

340

270

4951.000

47.9

34.4

-40.6

5.0

0.0

46.7

74.0

-27.3

Horizontal

200

180

Average

Ant

Amp

Cbl

Freq

Mtr Rdg

Fac

Fac

Fac

MHz

dBuV

dB/m

dB

dB

Dist

Average Average Average

Ant

Corr

Total

Limit

Lim Mrg

Pol

dB

dBµV/m dBµV/m

dB

Mast Ht cm

Azim °

1295.500

37.4

29.1

-41.8

2.4

0.0

27.1

54.0

-26.9

Horizontal

120

180

1669.000

35.5

29.0

-41.1

2.7

0.0

26.1

54.0

-27.9

Vertical

120

270

2235.000

35.1

31.4

-40.7

3.2

0.0

29.1

54.0

-24.9

Vertical

200

270

2681.500

35.9

32.6

-41.4

3.6

0.0

30.8

54.0

-23.2

Horizontal

340

180

3488.000

34.4

32.9

-40.5

4.2

0.0

31.1

54.0

-22.9

Horizontal

340

270

4951.000

34.2

34.4

-40.6

5.0

0.0

33.0

54.0

-21.0

Horizontal

200

180

Excessive Peak Level
Excessive Average
Level

Page 32 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 926.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Horizontal

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 04:56:28 PM

Page 33 of 96

Engineering Test Report No. 2201780-03

FCC Part 15B Class B

Radiated RF Emissions Test

SW ID/Rev: VBV2 03/23/2022

Manufacturer

: Chamberlain

Model

: 003-0458-5

Serial Number

: 151220510865

DUT Mode

: FHSS Rx @ 926.75MHz

Turntable Step Angle (°) : 45

Mast Positions (cm) : 120, 200, 340

Antenna Polarization : Vertical

Scan Type

: Stepped Scan

Test RBW

: 1 MHz

Prelim Dwell Time (s) : 0.0001

Notes

:

Test Engineer

: N. Bouchie

Test Date

: Apr 27, 2022 04:56:28 PM

Page 34 of 96

Engineering Test Report No. 2201780-03

21. Transmitter Conducted Emissions (AC Mains)

Manufacturer Product Model No. Serial No. Mode

Test Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510793 Tx Mid @ 914.75MHz

Setup Format Height of Support Type of Test Site Test Site Used Notes

Test Setup Details Tabletop N/A Reverberation Chamber Room #14 None

Measurement Uncertainty Measurement Type Conducted disturbance (mains port) (150 kHz ­ 30 MHz)

Expanded Measurement Uncertainty 2.7

Requirements All radio frequency voltages on the power lines for any frequency or frequencies of an intentional radiator shall not exceed the limits in the following table:

Transmitter Conducted Emissions Limits

Frequency of Emission (MHz)

Quasi-peak

Conducted Limits (dBµV)

0.15 ­ 0.5

66 to 56*

0.5 ­ 5

56

5 ­ 30

60

* The lower limit shall apply at the transition frequencies.

Average 56-46*
46 50

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Engineering Test Report No. 2201780-03
Procedure The interference on each power lead of the EUT was measured by connecting the measuring equipment to the appropriate meter terminal of the Line Impedance Stabilization Network (LISN). The meter terminal of the LISN not under test was terminated with 50 ohms.
1) The EUT was operated in the Tx Mid @ 914.75MHz mode. 2) Measurements were first made on the 120VAC 60Hz high line. 3) The frequency range from 150kHz to 30MHz was broken up into smaller frequency sub-bands. 4) Conducted emissions measurements were taken on the first frequency sub-band using a peak
detector. 5) The data thus obtained was then searched by the computer for the highest levels. Any emissions
levels that were within 4dB of the average limit were then measured again using both a quasi-peak detector and an average detector. (If no peak readings were within 10dB of the average limit, quasipeak and average readings were taken on the highest emissions levels measured during the peak detector scan.) 6) Steps (4) and (5) were repeated for the remainder of the frequency sub-bands until the entire frequency range from 150kHz to 30MHz was investigated. The peak trace was automatically plotted. The plot also shows quasi-peak and average readings that were taken on discrete frequencies. A table showing the quasi-peak and average readings was also generated. This tabular data compares the quasi-peak and average conducted emissions to the applicable conducted emissions limits. The resultant voltage level (VL) is a summation in decibels (dB) of the receiver meter reading (MTR) and the cable loss factor (CF).
Formula 1: VL (dBµV) = MTR (dBµV) + CF (dB) 7) Steps (3) through (6) were repeated on the 120VAC 60Hz return line.
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Engineering Test Report No. 2201780-03

Test Setup for RF Conducted Emissions (AC Mains)

Test Setup for RF Conducted Emissions (AC Mains)

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Engineering Test Report No. 2201780-03

Test Setup for RF Conducted Emissions (AC Mains)

Test Setup for RF Conducted Emissions (AC Mains)

Page 38 of 96

Engineering Test Report No. 2201780-03

FCC Part 15 Subpart B Conducted Emissions Test

Significant Emissions Data

VBR8 05/14/2020

Manufacturer

: Chamberlain

Model

: 003-0458-5

DUT Revision

:

Serial Number

: 151220510865

DUT Mode

: 900MHz Tx @ 914.75MHz

Line Tested

: High, PLF4

Scan Step Time [ms] : 30

Meas. Threshold [dB] : -4

Notes

:

Test Engineer

: N. Bouchie

Limit

: Class B

Test Date

: Apr 28, 2022 10:11:09 AM

Data Filter

: Up to 80 maximum levels detected with 6 dB level excursion threshold over 4 dB

margin below limit

Freq MHz
0.245 0.432 0.491 0.554 0.617 0.676 0.739 0.862 0.925 0.988 1.047 1.295 2.034 3.145 5.108 15.273 23.320

Quasi-peak Level dBµV 53.5 51.9 52.8 51.3 53.0 51.0 52.6 52.1 51.3 50.9 52.0 51.2 47.0 37.4 25.6 15.0 44.1

Quasi-peak Limit dBµV 61.9 57.2 56.2 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 60.0 60.0 60.0

Excessive Quasi-peak Emissions

Average Level dBµV 41.8 45.3 41.1 43.6 38.6 42.8 45.8 43.6 42.5 42.5 43.1 43.0 39.6 28.8 17.1 8.3 37.7

Average Limit dBµV 51.9 47.2 46.2 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 50.0 50.0 50.0

Excessive Average Emissions

Page 39 of 96

Engineering Test Report No. 2201780-03

FCC Part 15 Subpart B Conducted Emissions Test

Cumulative Data

VBR8 05/14/2020

Manufacturer

: Chamberlain

Model

: 003-0458-5

DUT Revision

:

Serial Number

: 151220510865

DUT Mode

: 900MHz Tx @ 914.75MHz

Line Tested

: High, PLF4

Scan Step Time [ms] : 30

Meas. Threshold [dB] : -4

Notes

:

Test Engineer

: N. Bouchie

Limit

: Class B

Test Date

: Apr 28, 2022 10:11:09 AM

Emissions Meet QP Limit Emissions Meet Ave Limit

Page 40 of 96

Engineering Test Report No. 2201780-03

FCC Part 15 Subpart B Conducted Emissions Test

Significant Emissions Data VBR8 05/14/2020

Manufacturer Model

: Chamberlain : 003-0458-5

DUT Revision Serial Number

: : 151220510865

DUT Mode

: 900MHz Tx @ 914.75MHz

Line Tested

: Neutral, PLF2

Scan Step Time [ms] : 30

Meas. Threshold [dB] : -10

Notes

:

Test Engineer

: N. Bouchie

Limit

: Class B

Test Date

: Apr 28, 2022 10:02:12 AM

Data Filter

: Up to 80 maximum levels detected with 6 dB level excursion threshold over 10 dB margin below limit

Freq MHz
0.186 0.311 0.369 0.432 0.554 0.617 0.680 0.739 0.799 0.925 0.988 1.047 1.110 1.173 1.231 1.295 1.354 1.417 1.480 1.543 1.601 1.664 1.723 1.786 1.849 1.912 1.970 2.034 2.097 2.156 3.203 5.000 12.501 23.324

Quasi-peak Level dBµV 48.1 47.5 43.8 45.9 45.3 46.1 43.9 45.3 44.2 44.6 44.4 45.2 44.4 43.0 43.4 44.6 43.1 42.7 43.1 43.1 42.9 42.0 40.2 41.9 42.0 41.1 40.1 40.6 39.7 39.8 32.9 22.9 20.3 42.4

Quasi-peak Limit dBµV 64.2 60.0 58.5 57.2 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 56.0 60.0 60.0

Excessive Quasi-peak Emissions

Average Level dBµV 43.3 44.7 39.4 41.6 40.0 39.0 40.2 44.3 41.1 41.0 38.2 41.6 39.7 36.1 41.4 41.1 40.1 37.4 39.2 39.1 41.6 38.0 36.9 36.8 38.7 37.0 36.7 38.1 36.4 38.4 26.3 12.9 13.0 35.2

Average Limit dBµV 54.2 50.0 48.5 47.2 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0 50.0 50.0

Excessive Average Emissions

Page 41 of 96

Engineering Test Report No. 2201780-03

FCC Part 15 Subpart B Conducted Emissions Test

Cumulative Data

VBR8 05/14/2020

Manufacturer

: Chamberlain

Model

: 003-0458-5

DUT Revision

:

Serial Number

: 151220510865

DUT Mode

: 900MHz Tx @ 914.75MHz

Line Tested

: Neutral, PLF2

Scan Step Time [ms] : 30

Meas. Threshold [dB] : -10

Notes

:

Test Engineer

: N. Bouchie

Limit

: Class B

Test Date

: Apr 28, 2022 10:02:12 AM

Emissions Meet QP Limit Emissions Meet Ave Limit

Page 42 of 96

Engineering Test Report No. 2201780-03

22. 20dB Bandwidth

Manufacturer Product Model No. Serial No.
Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz Tx Mid @ 914.75MHz Tx High @ 926.75MHz

Setup Format Height of Support Measurement Method Type of Test Site Test Site Used Notes

Test Setup Details Tabletop N/A Antenna Conducted Tabletop EMC Bench None

Measurement Uncertainty
Measurement Type
Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz)

Expanded Measurement
Uncertainty 4.3
3.1

Requirements Systems using frequency hopping techniques operating in the 902 ­ 928MHz band are allowed a maximum 20dB bandwidth of 500kHz.

Procedure The antenna port of the EUT was connected to the spectrum analyzer through 30dB of attenuation. With the hopping function disabled, the EUT was allowed to transmit continuously.
The frequency hopping channel was set separately to low, middle, and high hopping channels. The resolution bandwidth (RBW) was set to  1% of the 20dB BW. The span was set to approximately 2 to 3 times the 20dB bandwidth.
The 'Max-Hold' function was engaged. The analyzer was allowed to scan until the envelope of the transmitter bandwidth was defined. The analyzer's display was then screenshot and saved.

Page 43 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz 902.25MHz 20dB BW = 138.9kHz None

Page 44 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Mid @ 914.75MHz 914.75MHz 20dB BW = 139.9kHz None

Page 45 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx High @ 926.75MHz 926.75MHz 20dB BW = 139.9kHz None

Page 46 of 96

Engineering Test Report No. 2201780-03

23. Occupied Bandwidth (99%)

Manufacturer Product Model No. Serial No.
Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz Tx Mid @ 914.75MHz Tx High @ 926.75MHz

Setup Format Height of Support Measurement Method Type of Test Site Test Site Used Type of Antennas Used Notes

Test Setup Details Tabletop N/A Antenna Conducted Tabletop EMC Bench N/A None

Measurement Uncertainty

Measurement Type

Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz)

Expanded Measurement
Uncertainty 4.3
3.1

Procedure The antenna port of the EUT was connected to the spectrum analyzer through 40dB of attenuation.
The EUT was allowed to transmit continuously. The transmit channel was set separately to low, middle, and high channels. The resolution bandwidth (RBW) was set to 1% to 5% of the actual occupied / x dB bandwidth, the video bandwidth (VBW) was set 3 times greater than the RBW, and the span was set large enough to capture all products of the modulation process, including the emission skirts, around the carrier frequency.
The 'Max-Hold' function was engaged. The analyzer was allowed to scan until the envelope of the transmitter bandwidth was defined. The analyzer's display was plotted using a 'screen dump' utility.

Page 47 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz 902.25MHz OBW = 185.27kHz None

Page 48 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Mid @ 914.75MHz 914.75MHz OBW = 184.05kHz None

Page 49 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx High @ 926.75MHz 926.75MHz OBW = 183.04kHz None

Page 50 of 96

Engineering Test Report No. 2201780-03

24. Carrier Frequency Separation

Manufacturer Product Model No. Serial No. Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Hopping

Setup Format Height of Support Measurement Method Type of Test Site Test Site Used Type of Antennas Used Notes

Test Setup Details Tabletop N/A Antenna Conducted Tabletop EMC Bench N/A None

Measurement Uncertainty

Measurement Type

Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz)

Expanded Measurement
Uncertainty 4.3
3.1

Requirement
Channel carrier frequencies shall be separated by a minimum of 25kHz or the 20dB bandwidth, whichever is greater. Alternatively, frequency hopping systems operating in the 2400-2483.5MHz band may have hopping channel carrier frequencies that are separated by 25kHz or two-thirds of the 20dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125mW.

Procedure The antenna port of the EUT was connected to the spectrum analyzer through 40dB of attenuation. With the hopping function enabled, the EUT was allowed to transmit continuously.
Span was set wide enough to capture the peaks of two adjacent channels. The resolution bandwidth was set to approximately 30% of the channel spacing. The peak detector and 'Max-Hold' function were engaged. The span was set wide enough to capture the peaks of at least two adjacent channels. When the trace had stabilized after multiple scans, the marker-delta function was used to determine the separation between the peaks of the adjacent channels. The analyzer's display was plotted using a 'screen dump' utility.

Page 51 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Hopping 902.25MHz and 902.75MHx Separation = 500.5kHz None

Page 52 of 96

Engineering Test Report No. 2201780-03

25. Number of Carrier Channels

Manufacturer Product Model No. Serial No. Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Hopping

Setup Format Height of Support Measurement Method Type of Test Site Test Site Used Type of Antennas Used Notes

Test Setup Details Tabletop N/A Antenna Conducted Tabletop EMC Bench N/A None

Measurement Uncertainty

Measurement Type

Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz)

Expanded Measurement
Uncertainty 4.3
3.1

Requirements The system shall use at least 50 hopping frequencies.

Procedure The antenna port of the EUT was connected to the spectrum analyzer through 40dB of attenuation. With the hopping function enabled, the EUT was allowed to transmit continuously.
The resolution bandwidth (RBW) was set to less than 30% of the channel spacing or the 20dB bandwidth, whichever is smaller. The peak detector and 'Max-Hold' function were engaged. The span was set wide enough to capture the entire frequency band of operation.
The EUT's signal was allowed to stabilize after multiple scans. The number of hopping frequencies was counted. The analyzer's display was plotted using a 'screen dump' utility.

Page 53 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Range Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Hopping 902-928MHz 50 hopping frequencies None

Page 54 of 96

Engineering Test Report No. 2201780-03

26. Average Time of Occupancy

Manufacturer Product Model No. Serial No. Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Hopping

Setup Format Height of Support Measurement Method Type of Test Site Test Site Used Type of Antennas Used Notes

Test Setup Details Tabletop N/A Antenna Conducted Tabletop EMC Bench N/A None

Measurement Uncertainty

Measurement Type

Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz)

Expanded Measurement
Uncertainty 4.3
3.1

Requirements The average time of occupancy on any frequency shall not be greater than 0.4 seconds within a 20 second period.

Procedure The antenna port of the EUT was connected to the spectrum analyzer through 30dB of attenuation. With the hopping function enabled, the EUT was allowed to transmit continuously.
The spectrum analyzer was set to zero span centered on a hopping channel. The resolution bandwidth (RBW) was set  to the channel spacing. The sweep was set to capture the entire dwell time per hopping channel. The peak detector and 'Max-Hold' function were engaged. The analyzer's display was plotted using a 'screen dump' utility.

Page 55 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Range Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Hopping 902-928MHz Ave. Time of Occupancy = 0.1075 s Length of one pulse = 1.25 ms

Page 56 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Range Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Hopping 902-928MHz Ave. Time of Occupancy = 0.1075 s Number of Pulses in a 20 second window = 86

=



= 86  0.00125 = 0.1075

Page 57 of 96

Engineering Test Report No. 2201780-03

27. Maximum Peak Conducted Output Power

Manufacturer Product Model No. Serial No.
Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz Tx Mid @ 914.75MHz Tx High @ 926.75MHz

Setup Format Height of Support Measurement Method Type of Test Site Test Site Used Notes

Test Setup Details Tabletop N/A Antenna Conducted Tabletop EMC Bench N/A

Requirements The output power shall not exceed 1W (30dBm).

Procedure
The antenna port of the EUT was connected to the spectrum analyzer through 40dB of attenuation. With the hopping function disabled, the EUT was allowed to transmit continuously. The frequency hopping channel was set separately to low, middle, and high hopping channels. The resolution bandwidth (RBW) was set to greater than the 20dB bandwidth. The span was set to approximately 5 times the 20dB bandwidth. The 'Max-Hold' function was engaged. The maximum meter reading was recorded. The peak power output was calculated for the low, middle, and high hopping frequencies.

Page 58 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz 902.25MHz Output Power = 0.067W (18.25dBm) None

Page 59 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Mid @ 914.75MHz 914.75MHz Output Power = 0.070W (18.47dBm) None

Page 60 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No. Mode Frequency Tested Result Notes

Test Details Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx High @ 926.75MHz 926.75MHz Output Power = 0.071W (18.54dBm) None

Page 61 of 96

Engineering Test Report No. 2201780-03

28. Effective Isotropic Radiated Power (EIRP)

Manufacturer Product Model No. Serial No.
Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz Tx Mid @ 914.75MHz Tx High @ 926.75MHz

Setup Format Height of Support Measurement Method Type of Test Site Test Site Used Type of Antennas Used Notes

Test Setup Details Tabletop N/A Antenna Conducted Tabletop EMC Bench N/A None

Measurement Uncertainty

Measurement Type

Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz)

Requirements The output power shall not exceed 4W (36dBm).

Expanded Measurement
Uncertainty 4.3
3.1

Procedure
The EUT was placed on the non-conductive stand and set to transmit. A bilog antenna was placed at a test distance of 3 meters from the EUT. The resolution bandwidth (RBW) of the spectrum analyzer was set to greater than the 20dB bandwidth. The span was set to approximately 5 times the 20 dB bandwidth. The EUT was maximized for worst case emissions (or maximum output power) at the measuring antenna. The maximum meter reading was recorded. The peak power output was measured for the low, middle, and high hopping frequencies.
The equivalent power was determined from the field intensity levels measured at 3 meters using the substitution method. To determine the emission power, a dipole antenna (double ridged waveguide antenna for all measurements above 1GHz) was then set in place of the EUT and connected to a calibrated signal generator. The output of the signal generator was adjusted to match the received level at the spectrum analyzer. The signal level was recorded. The reading was then corrected to compensate for cable loss (and antenna gain for all measurements above 1GHz), as required. The peak power output was calculated for low, middle, and high hopping frequencies.

Page 62 of 96

Engineering Test Report No. 2201780-03

Manufacturer EUT Model No. Serial No.
Mode
Result Notes

Test Details
Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz Tx Mid @ 914.75MHz Tx High @ 926.75MHz Max EIRP = 0.195W (22.9dBm) None

Freq (MHz) 902.25
914.75
926.75

Wide BW Matched Equivalent

Meter

Sig Gen Antenna

Cable

Ant

Reading Reading

Gain

Loss

EIRP

Limit

Margin

Pol

(dBV)

(dBm)

(dB)

(dB)

(dBm)

(dBm)

(dB)

H

89.7

22.4

2.2

1.6

22.9

30.0

-7.1

V

84.8

19.4

2.2

1.6

19.9

30.0

-10.1

H

87.6

20.3

2.2

1.6

20.8

30.0

-9.2

V

88.0

21.6

2.2

1.6

22.1

30.0

-7.9

H

88.6

21.5

2.2

1.7

22.0

30.0

-8.0

V

86.5

20.4

2.2

1.7

20.9

30.0

-9.1

Page 63 of 96

Engineering Test Report No. 2201780-03

29. Duty Cycle Factor Measurements

Manufacturer Product Model No. Serial No. Mode

EUT Information Chamberlain Phoenix AC GDO Logic Board 003-0458-5 151220510865 Tx Low @ 902.25MHz

Setup Format Height of Support Measurement Method Type of Test Site Type of Antennas Used Notes

Test Setup Details Tabletop N/a Radiated Semi-Anechoic Chamber Bilog (or equivalent) None

Measurement Uncertainty

Measurement Type

Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz ­ 1000 MHz) Radiated disturbance (electric field strength on an open area test site or alternative test site) (1 GHz ­ 6 GHz)

Expanded Measurement
Uncertainty 4.3
3.1

Procedure The duty cycle factor is used to convert peak detected readings to average readings when pulsed modulation is employed. This factor is computed from the time domain trace of the pulse modulation signal.
With the transmitter set up to transmit for maximum pulse density, the time domain trace is displayed on the spectrum analyzer. This trace is obtained by tuning center frequency to the transmitter frequency and then setting a zero-span width with 10msec/div. The amplitude settings are adjusted so that the on/off transitions clear the 4th division from the bottom of the display. The markers are set at the beginning and end of the "on-time". The trace is recorded.
Next the spectrum analyzer center frequency is set to the transmitter frequency with a zero-span width and 10msec/div. This shows if the word is longer than 100msec or shorter than 100msec. If the word period is less than 100msec, the display is set to show at least one word. The on-time and off-time are then measured. The on-time is total time signal level exceeds the 4th division. Off-time is time under for the word period.

The duty cycle is then computed as

, where

= (

+

).

Page 64 of 96



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