
Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.
FM+ C Assistive Listening System FM T55 C and T55 C [D] USER MANUAL MAN 280A 23 FM + CFM + C Table of Contents Safety Warnings and Instructions ��������������������������������������������������������������������������������������������������������������������������������������������3 Recycling Instructions ����������������������������������������������������������������������������������������������������������������������������������������������������������������3 System Overview ������������������������������������������������������������������������������������������������������������������������������������������������������������������������4 Quick Setup Instructions �����������������������������������������������������������������������������������������������������������������������������������������������������������5 Installing the ANT 025 Whip Antenna �����������������������������������������������������������������������������������������������������������������������������������������������������������������������6 Router and Network Equipment Selection �����������������������������������������������������������������������������������������������������������������������������6 Wiring and Connections �������������������������������������������������������������������������������������������������������������������������������������������������������������7 Ethernet and Dante RJ-45 Connection ����������������������������������������������������������������������������������������������������������������������������������������������������������������������8 Audio Source Connections �������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������8 Multi-Channel Sources ���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������8 Connecting Additional Sound Systems ���������������������������������������������������������������������������������������������������������������������������������������������������������������������8 Avoiding Hum in the Audio (as a Result of a Ground Loop) ���������������������������������������������������������������������������������������������������������������������������������9 Selecting an Audio Source Appropriate for Hearing Impaired Listeners ���������������������������������������������������������������������������������������������������������9 Controls and Features ��������������������������������������������������������������������������������������������������������������������������������������������������������������10 System Settings �������������������������������������������������������������������������������������������������������������������������������������������������������������������������13 Audio Settings ����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������13 Audio Source (OLED or Web Interface) �������������������������������������������������������������������������������������������������������������������������������������������������������������������13 Audio Input Gain ����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������13 Audio Presets �����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������13 Custom Audio Preset ����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������13 High-pass Filter ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������14 Low-pass Filter ���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������14 Dynamic Range Compression ������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������14 FM Output Power ����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������14 FM Time-Out �������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������14 Screen Lock ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������15 User-Entered Transmitter Description ���������������������������������������������������������������������������������������������������������������������������������������������������������������������15 Channel ����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������15 Restore Defaults �����������������������������������������������������������������������������������������������������������������������������������������������������…
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external_photos.docx Page 1 of 4 2022-07-27 All photographs in this document are of the FM T55C. Extra notes are provided to describe the FM T55CD based on these photographs. I. Photographs Figure 1: Back and top of unit In this Figure 1, a cap is put on the Dante port for the FM T55C. For the FM T55CD model, an add-on module is placed inside the chassis and this cap is removed to reveal another RJ-45 port. Figure 2: Front and top of unit Williams AV 10300 Valley View Road Eden Prairie, Minnesota 55344 FCC ID: CNMFMT55C IC ID: 1360A-FMT55C FM T55C(D) External Photos external_photos.docx Page 2 of 4 2022-07-27 Figure 3: Bottom of unit with labels For the FM T55CD, the labels will show the model number as: FM T55CD. external_photos.docx Page 3 of 4 2022-07-27 Figure 4: Front, top, and right sides of unit external_photos.docx Page 4 of 4 2022-07-27 Figure 5: Bottom, back, and left sides of unit
label_description-FMT55C(D)-FCC.docx Page 1 of 2 2022-07-26 I. Intro This document provides a detailed description of the labels (IDZ08[D]) belonging on the Williams AV FM T55C and FM T55CD FM transmitters. The labels described are labels with information and/or symbols pertaining to FCC and IC certifications for intentional radiators in the 72-76 MHz band. II. Label description The label of the FM T55C(D) shall: include: o the FCC/IC ID o a statement of compliance with FCC part 15 be printed on labels o with dimensions 1” x 2.75” (or larger) o made of metalized polyester o using permanent acrylic adhesive o using resin ribbon using a thermal transfer printer be hand placed, and pressed down firmly to achieve adhesion III. Label diagram Figure 1: Label diagram Williams AV 10300 Valley View Road Eden Prairie, Minnesota 55344 FCC ID: CNMFMT55C IC ID: 1360A-FMT55C FCC/IC label location and details label_description-FMT55C(D)-FCC.docx Page 2 of 2 2022-07-26 IV. Label location The label shall be located on the bottom of the FM T55C, as shown in Figure 2. Figure 2: Picture of Labels on Device V. Additional information Statements according to RSSGEN Sec. 8.4 are written in the manual for this device.
internal_photos.docx Page 1 of 12 2022-07-28 I. Intro The FM T55C has two primary boards: PCA 332 and PCA 334. PCA 332 is the main board with the microprocessor and the RF circuitry. PCA 334 is attached via ribbon cable and has a screen and a few buttons. The FM T55CD also has a Dante add-on board: PCA 300. Williams AV 10300 Valley View Road Eden Prairie, Minnesota 55344 FCC ID: CNMFMT55C IC ID: 1360A-FMT55C FM T55C(D) Internal Photos internal_photos.docx Page 2 of 12 2022-07-28 II. Photographs Figure 1: PCA 332-Top internal_photos.docx Page 3 of 12 2022-07-28 Figure 2: PCA 332-Top-No Shield internal_photos.docx Page 4 of 12 2022-07-28 Figure 3: PCA 332-Bottom Figure 4: PCA 334-Top internal_photos.docx Page 5 of 12 2022-07-28 Figure 5: PCA 334-Bottom internal_photos.docx Page 6 of 12 2022-07-28 Figure 6: PCA 332-Annotated and in chassis internal_photos.docx Page 7 of 12 2022-07-28 Figure 7: PCA 332-Annotated and No Shield internal_photos.docx Page 8 of 12 2022-07-28 Figure 8: PCA 332-RF Gain Stage internal_photos.docx Page 9 of 12 2022-07-28 Figure 9: PCA 332-RF Section internal_photos.docx Page 10 of 12 2022-07-28 Figure 10: FM T55CD with PCA 300 installed internal_photos.docx Page 11 of 12 2022-07-28 Figure 11: PCA 300-Top internal_photos.docx Page 12 of 12 2022-07-28 Figure 12: PCA 300-Bottom
antenna_info.docx Page 1 of 5 2022-08-09 The FM T55C(D) is a base station transmitter operating in the 72-76MHz band. We offer # antennas for sale with this product: ANT 005 o Manufactured by Lee Manufacturing. P/N: ANT 005B o This is a remote coaxial antenna. It includes a 22’ long overall cable, with an 80” section providing the active antenna. This antenna is connected to the FM T55C(D) via the standard F-connector port on the rear of the unit. o Gain of +2.4dBi max – dipole Figure 1: ANT 005 ANT 021 o Manufactured by Mobil-Advance Industrial Co LTD. P/N: AM168-002/Rev D o This is a rubber ducky antenna. It is 9” long and is screwed directly onto the transmitter board. The port of this antenna is a #10-32 screw hole, which matches the non-standard #10-32 screw post mount on the FM T55C(D). o Gain of -2.8dBi max - monopole Williams AV 10300 Valley View Road Eden Prairie, Minnesota 55344 FCC ID: CNMFMT55C IC ID: 1360A-FMT55C FM T55C(D) Antenna Information antenna_info.docx Page 2 of 5 2022-08-09 Figure 2: ANT 021 ANT 024 o Manufactured by Williams AV. P/N: ANT 024 o This is a wall mounted telescoping dipole whip antenna for remote installation. It is 40” long with both whips fully extended. This antenna comes with a 75Ω RG-9U coaxial cable with F-connectors to connect the ANT 024 to the F-connector port on the rear of the FM T55C(D). o Gain of -1.7dBi max - dipole Figure 3: ANT 024 ANT 025 antenna_info.docx Page 3 of 5 2022-08-09 o Manufactured by Mobil-Advance Industrial Co LTD. P/N: AM168-004/Rev C o This is a PCB mount telescoping whip antenna. It is 39” long when fully extended. The port of this antenna is a non-standard #10-32 screw hole, which matches the #10-32 screw post mount on the FM T55C(D). o Gain of 2.4dBi max - monopole Figure 4: ANT 025 ANT 028 o Manufactured by Mobil-Advance Industrial Co LTD. P/N: STEM-1F-SW / Rev A o This is a rear mount telescopic whip antenna on a 180° swivel. It is 39” long when fully extended. This antenna connects directly to the F-connector port on the rear of the FM T55C(D). o Gain of -2.6dBi max - monopole antenna_info.docx Page 4 of 5 2022-08-09 Figure 5: ANT 028 ANT 029 o Manufactured by Williams AV. P/N: ANT 029 o This is a rubber ducky antenna. It is 9” long and is screwed into a rack mount female to female F-connector port, which is in turn connected to the rear F-connector antenna port on the FM T55C(D) via a coaxial cable. o Gain of 0dBi max - monopole Figure 6: ANT 029 These antennas comply with FCC 15.203, and shall always be installed by a qualified professional installer. Only approved compliant antennas shall be used with this device. ANT 021 and ANT 025 are antennas that mount by a non-standard screw post (or stud) through a hole in the top cover of the chassis. No other antennas will mate with this socket. antenna_info.docx Page 5 of 5 2022-08-09 ANT 005, ANT 024, ANT 028, and ANT 029 are antennas that attach to the F-connector on the back of the unit. This F-connector has a cap that is thread locked, which needs a tool to be removed in order to professionally install any antennas on this port. All of these antennas have been tested and verified to radiate less than the maximum 80mV/m at 3 meters permitted to this type of equipment, when connected to the FM T55C(D) transmitter(s) with a radiated output as set by the manufacturer.
This report must not be used to claim product certification, approval, or endorsement by A2LA or any agency of the U.S. Government. This Report shall not be reproduced, except in full without written approval of the laboratory. Williams Sound, LLC FM T55C FCC 2.1091:2022 FM Transmitter Radio Report: WILM0087.3, Issue Date: August 19, 2022 CERTIFICATE OF EVALUATION 2018-09-14 Product compliance is the responsibility of the client; therefore, the tests and equipment modes of operation represented in this report were agreed upon by the client, prior to testing. The results of this test pertain only to the sample(s) tested. The specific description is noted in each of the individual sections of the test report supporting this certificate of test. This report reflects only those tests from the referenced standards shown in the certificate of test. It does not include inspection or verification of labels, identification, marking or user information. As indicated in the Statement of Work sent with the quotation, Element’s standard process is to always use the latest published version of the test methods even when earlier versions are cited in the test specification. Issuance of a purchase order was de facto acceptance of this approach. Otherwise, the client would have advised Element in writing of the specific version of the test methods they wanted applied to the subject testing Last Date of Evaluation: August 19, 2022 Williams Sound, LLC EUT: FM T55C RF Exposure Evaluation Standards Specification Method FCC 2.1091:2022 FCC 447498 D01 General RF Exposure Guidance v06 Results Method Clause Description Applied Results Comments 7.1 Maximum Permissible Exposure Yes Pass None Deviations From Evaluation Standards None Approved By: Donald Facteau, Process Architect Report No. WILM0087.32/12 REVISION HISTORY 2018.07.17 Revision Number Description Date (yyyy-mm-dd) Page Number 00 None Report No. WILM0087.33/12 ACCREDITATIONS AND AUTHORIZATIONS 2021.09.01 United States FCC - Designated by the FCC as a Telecommunications Certification Body (TCB). Certification chambers, Open Area Test Sites, and conducted measurement facilities are listed with the FCC. A2LA - Each laboratory is accredited by A2LA to ISO / IEC 17025, and as a product certifier to ISO / IEC 17065 which allows Element to certify transmitters to FCC and IC specifications. Canada ISED - Recognized by Innovation, Science and Economic Development Canada as a Certification Body (CB) and as a CAB for the acceptance of test data. European Union European Commission – Recognized as an EU Notified Body validated for the EMCD and RED Directives. United Kingdom BEIS – Recognized by the UK as an Approved Body under the UK Radio Equipment and UK EMC Regulations. Australia/New Zealand ACMA - Recognized by ACMA as a CAB for the acceptance of test data. Korea MSIT / RRA - Recognized by KCC’s RRA as a CAB for the acceptance of test data. Japan VCCI - Associate Member of the VCCI. Conducted and radiated measurement facilities are registered. Taiwan BSMI – Recognized by BSMI as a CAB for the acceptance of test data. NCC - Recognized by NCC as a CAB for the acceptance of test data. Singapore IDA – Recognized by IDA as a CAB for the acceptance of test data. Israel MOC – Recognized by MOC as a CAB for the acceptance of test data. Hong Kong OFCA – Recognized by OFCA as a CAB for the acceptance of test data. Vietnam MIC – Recognized by MIC as a CAB for the acceptance of test data. SCOPE For details on the Scopes of our Accreditations, please visit: California Minnesota Oregon Texas Washington Report No. WILM0087.34/12 FACILITIES 2020.12.15 California Labs OC01-17 41 Tesla Irvine, CA 92618 (949) 861-8918 Minnesota Labs MN01-11 9349 W Broadway Ave. Brooklyn Park, MN 55445 (612)-638-5136 Oregon Labs EV01-12 6775 NE Evergreen Pkwy #400 Hillsboro, OR 97124 (503) 844-4066 Texas Labs TX01-09 3801 E Plano Pkwy Plano, TX 75074 (469) 304-5255 Washington Labs NC01-05 19201 120 th Ave NE Bothell, WA 98011 (425)984-6600 A2LA Lab Code: 3310.04 Lab Code: 3310.05 Lab Code: 3310.02 Lab Code: 3310.03 Lab Code: 3310.06 Innovation, Science and Economic Development Canada 2834B-1, 2834B-3 2834E-1, 2834E-3 2834D-1 2834G-1 2834F-1 BSMI SL2-IN-E-1154R SL2-IN-E-1152R SL2-IN-E-1017 SL2-IN-E-1158R SL2-IN-E-1153R VCCI A-0029 A-0109 A-0108 A-0201 A-0110 Recognized Phase I CAB for ISED, ACMA, BSMI, IDA, KCC/RRA, MIC, MOC, NCC, OFCA US0158 US0175 US0017 US0191 US0157 Report No. WILM0087.35/12 PRODUCT DESCRIPTION 2018-07-17 Client and Equipment Under Evaluation Information Company Name: Williams Sound, LLC Address: 10300 Valley View Road City, State, Zip: EDEN PRAIRIE, MN 55344 Evaluation Requested By: Jacob Lewis EUT: FM T55C Date of Evaluation: 8/18/2022 Information Provided by the Party Requesting the Evaluation Functional Description of the Equipment: The FM T55C is an FM transmitter operating at 72-76 MHz (Assistive Listening Band) with wired networking capabilities (an Ethernet jack). It receives analog audio as the input signal for transmission. The FM T55CD features an add-on board to receive digital audio via a separate Ethernet connection (Dante audio). Both models use the same FM transmitter, front panel and network interface. The FM T55C can be used with the following antennas: ANT 005 Manufactured by Lee Manufacturing. P/N: ANT 005B This is a remote coaxial antenna. It includes a 22’ long overall cable, with an 80” section providing the active antenna. This antenna is connected to the FM T55C(D) via the standard F-connector port on the rear of the unit. Gain of +2.4dBi max – dipole ANT 021 Manufactured by Mobil-Advance Industrial Co LTD. P/N: AM168-002/Rev D This is a rubber ducky antenna. It is 9” long and is screwed directly onto the transmitter board. The port of this antenna is a #10-32 screw hole, which matches the non-standard #10-32 screw post mount on the FM T55C(D). Gain of -2.8dBi max - monopole ANT 024 Manufactured by Williams AV. P/N: ANT 024 This is a wal…
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This report must not be used to claim product certification, approval, or endorsement by A2LA or any agency of the U.S. Government. This Report shall not be reproduced, except in full without written approval of the laboratory. Williams Sound, LLC FM T55C FCC 15.237:2022 FM Transmitter Radio Report: WILM0087.1 Rev. 1, Issue Date: August 25, 2022 CERTIFICATE OF TEST 2022.04.01 Product compliance is the responsibility of the client; therefore, the tests and equipment modes of operation represented in this report were agreed upon by the client, prior to testing. The results of this test pertain only to the sample(s) tested. The specific description is noted in each of the individual sections of the test report supporting this certificate of test. This report reflects only those tests from the referenced standards shown in the certificate of test. It does not include inspection or verification of labels, identification, marking or user information. As indicated in the Statement of Work sent with the quotation, Element’s standard process is to always use the latest published version of the test methods even when earlier versions are cited in the test specification. Issuance of a purchase order was de facto acceptance of this approach. Otherwise, the client would have advised Element in writing of the specific version of the test methods they wanted applied to the subject testing. Last Date of Test: July 18, 2022 Williams Sound, LLC EUT: FM T55C Radio Equipment Testing Standards Specification Method FCC 15.207:2022 ANSI C63.10:2013 FCC 15.237:2022 ANSI C63.10:2013 Results Test Description Result Specification Section(s) Method Section(s) Comments Duty Cycle N/A 15.207 7.5 Not required assuming the devices uses 100% duty cycle Field strength of Harmonics and Spurious Radiated Emissions Pass 15.237(c) 6.5, 6.6 Field Strength of Fundamental Pass 15.237(c) 6.6 Occupied Bandwidth (20 dB) Pass 15.237(b) 6.9 Powerline Conducted Emissions Pass 15.207 6.2 Deviations From Test Standards A reduced Resolution Bandwidth was used for measurements at the edge of the allowed band based on ~1% of the measured emissions bandwidth. Using the prescribed CISPR RBW (30 kHz) to measure this narrow signal near the edge of the allowed band, you see the shoulders of the filter (essentially the filter response) and not the actual signal to be measured. This path was confirmed via FCC enquiry. Approved By: Kyle McMullan, Department Manager Report No. WILM0087.1 Rev 12/47 REVISION HISTORY 2018.07.17 Revision Number Description Date (yyyy-mm-dd) Page Number 01 Type of modulation used for testing added. Their device has a limiter in line that limits the possible modulation, this is added to product desc. 2022-08-25 10, 16, 22, 38-38 Report No. WILM0087.1 Rev 13/47 ACCREDITATIONS AND AUTHORIZATIONS 2021.09.01 United States FCC - Designated by the FCC as a Telecommunications Certification Body (TCB). Certification chambers, Open Area Test Sites, and conducted measurement facilities are listed with the FCC. A2LA - Each laboratory is accredited by A2LA to ISO / IEC 17025, and as a product certifier to ISO / IEC 17065 which allows Element to certify transmitters to FCC and IC specifications. Canada ISED - Recognized by Innovation, Science and Economic Development Canada as a Certification Body (CB) and as a CAB for the acceptance of test data. European Union European Commission – Recognized as an EU Notified Body validated for the EMCD and RED Directives. United Kingdom BEIS – Recognized by the UK as an Approved Body under the UK Radio Equipment and UK EMC Regulations. Australia/New Zealand ACMA - Recognized by ACMA as a CAB for the acceptance of test data. Korea MSIT / RRA - Recognized by KCC’s RRA as a CAB for the acceptance of test data. Japan VCCI - Associate Member of the VCCI. Conducted and radiated measurement facilities are registered. Taiwan BSMI – Recognized by BSMI as a CAB for the acceptance of test data. NCC - Recognized by NCC as a CAB for the acceptance of test data. Singapore IDA – Recognized by IDA as a CAB for the acceptance of test data. Israel MOC – Recognized by MOC as a CAB for the acceptance of test data. Hong Kong OFCA – Recognized by OFCA as a CAB for the acceptance of test data. Vietnam MIC – Recognized by MIC as a CAB for the acceptance of test data. SCOPE For details on the Scopes of our Accreditations, please visit: California Minnesota Oregon Texas Washington Report No. WILM0087.1 Rev 14/47 FACILITIES 2020.12.15 California Labs OC01-17 41 Tesla Irvine, CA 92618 (949) 861-8918 Minnesota Labs MN01-11 9349 W Broadway Ave. Brooklyn Park, MN 55445 (612)-638-5136 Oregon Labs EV01-12 6775 NE Evergreen Pkwy #400 Hillsboro, OR 97124 (503) 844-4066 Texas Labs TX01-09 3801 E Plano Pkwy Plano, TX 75074 (469) 304-5255 Washington Labs NC01-05 19201 120 th Ave NE Bothell, WA 98011 (425)984-6600 A2LA Lab Code: 3310.04 Lab Code: 3310.05 Lab Code: 3310.02 Lab Code: 3310.03 Lab Code: 3310.06 Innovation, Science and Economic Development Canada 2834B-1, 2834B-3 2834E-1, 2834E-3 2834D-1 2834G-1 2834F-1 BSMI SL2-IN-E-1154R SL2-IN-E-1152R SL2-IN-E-1017 SL2-IN-E-1158R SL2-IN-E-1153R VCCI A-0029 A-0109 A-0108 A-0201 A-0110 Recognized Phase I CAB for ISED, ACMA, BSMI, IDA, KCC/RRA, MIC, MOC, NCC, OFCA US0158 US0175 US0017 US0191 US0157 Report No. WILM0087.1 Rev 15/47 MEASUREMENT UNCERTAINTY TMU.2015.07.10 Measurement Uncertainty When a measurement is made, the result will be different from the true or theoretically correct value. The difference is the result of tolerances in the measurement system that cannot be completely eliminated. To the extent that technology allows us, it has been our aim to minimize this error. Measurement uncertainty is a statistical expression of measurement error qualified by a probability distribution. A measurement uncertainty estimation has been performed for each test per our internal quality document QM205.4.6. The estimation is used to compare the measured result with its "true" or theoretical…
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POWERLINE CONDUCTED EMISSIONS WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 POWERLINE CONDUCTED EMISSIONS WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 FIELD STRENGTH OF HARMONICS AND SPURIOUS RADIATED EMISSIONS WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 FIELD STRENGTH OF HARMONICS AND SPURIOUS RADIATED EMISSIONS WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 FIELD STRENGTH OF HARMONICS AND SPURIOUS RADIATED EMISSIONS WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 FIELD STRENGTH OF FUNDAMENTAL WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 FIELD STRENGTH OF FUNDAMENTAL WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 FIELD STRENGTH OF FUNDAMENTAL WTD.2021.09.21.0 EmiR5 2022.03.10.0 PSA-ESCI 2022.1.12.0 XMit 2022.02.07.0 MN08 001.JPG MN08 002.JPG OCCUPIED BANDWIDTH
| # | Rule Parts | Frequency Range | Power Output |
|---|---|---|---|
| 3 | 15.237 | 75.2 MHz - 76 MHz | - |

FM T55, FM T55D
Equipment Class
GAT - Part 15 Auditory Assistance Device (Transmitter)
Battery operated auditory assistance transmitter
Equipment Class
DXT - Part 15 Low Power Transceiver, Rx Verified
Portable Conference Transmitter
Equipment Class
DSS - Part 15 Spread Spectrum Transmitter
Portable Hearing Assistance Transmitter
Equipment Class
GAT - Part 15 Auditory Assistance Device (Transmitter)
Portable Conference Transmitter
Equipment Class
DSS - Part 15 Spread Spectrum Transmitter