Personal FM™ Listening

Personal FM™ Listening System • Model PFM 863

ADA

Description:

The Personal FM Listening System, model PFM 863, helps to overcome distance from the speaker, reduces background noise and distractions for improved hearing in the classroom, job training, con- sultation and more. The speaker uses the T863 transmitter equipped with a microphone to deliver their message wirelessly to a listener. The listener uses the R863 receiver equipped with an ear- phone or headphone to pick-up the speaker’s message. The Personal FM system helps to overcome background noise, distance from the speaker, and enhances the quality of the message for all par- ticipants. The Personal FM system operates on 863 MHz, meets RoHS approval guidelines, and is backed by a 3 year factory warranty.

Applications:

Classrooms • Job Consultation • Job Training • Tours • Group Meetings

System • Model PFM 863

T863 Transmitter:

Dimensions:

155 mm H x 72 mm W x 30 mm T

 

(6.1” H x 2.85” W x 1.2” T)

Weight:

82 grams (2.89 oz.), no batteries

Color:

Black

Material:

ABS/Polycarbonate, shatter-resistant

Battery Type:

Two (2) AA 1.5 V Non-rechargeable Alkaline batteries

 

(BAT 001), 100 mA nominal current drain, 20 hours

 

approx. life

 

(OR)

 

Two (2) AA 1.2 V NiMH Rechargeable batteries (BAT 026),

 

100 mA nominal current drain, 15 hours per charge

 

approx., recharges in 14–16 hours, uses CHG 3512

 

Multiple Battery Charger

Operating Frequencies:

CH 1 - 863.25 MHz; CH 2 - 863.75 MHz;

 

CH 3 - 864.75 MHz ( ±30 kHz)

Operating Range:

30 meters (98.4 feet) with R863 receiver

Stability:

± .05 MHz, 0 - 50° Celsius

FM Deviation:

60 kHz ±5 kHz, transmitter input at 1 kHz, 2.5 mV

Pre-Emphasis:

50 µS

Sensitivity:

< - 90 dBm @ 60 kHz deviation

RF Output:

5 - 10 dBm

Freq Response:

500 Hz - 5 kHz, ±3 dB

Distortion:

< 2.0% THD

Transmit Antenna:

External, 5cm

Microphone:

Head-worn, noise-cancelling, electret type, 39 in. cord, 3.5

 

mm mono phone plug (MIC 086)

Controls & Indicators:

Microphone gain adjust; Channel/Power selector (4 posi-

 

tion rotary switch): “Power icon” is off; position 1 is CH1;

 

position2 is CH 2; position 3 is CH 3

 

Power on indicator: Red LED “on” indicates when receiv-

 

er has power

 

Low battery indicator: Power LED flashes when batteries

 

are low

 

Battery selector: Slide switch for alkaline or NiMH battery

 

operation

Mic Connector:

3.5 mm jack

Charging Contacts:

Designed for use with CHG 3512 Battery Charger

Approvals:

CE, RoHS, WEEE, ETSI EN 301 357-1, ETSI EN 301 357-2

Warranty:

3 years parts and labor (90 days on accessories)

 

On/Off/Channel

"On" Indicator LED

Selector Switch

Microphone Jack

Antenna

T863 Top

T863 Front

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!

 

©2007, Williams Sound Corp. MCAT 061A

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Williams Sound PFM 863 specifications Description, T863 Transmitter
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PFM 863 specifications

The Williams Sound PFM 863 is a versatile and high-performance personal FM listening system designed to meet a variety of audio communication needs in different environments. This advanced device is particularly useful for those who require hearing assistance during lectures, presentations, or in other public spaces. The PFM 863 offers numerous features and technologies that make it a popular choice for both individuals and organizations.

One of the key features of the PFM 863 is its excellent sound quality. The system operates on the FM frequency band and utilizes sophisticated audio processing technologies to ensure that the sound is clear and intelligible. The device supports a wide frequency response, allowing it to deliver rich audio that enhances the listening experience, even in noisy environments.

The PFM 863 is equipped with a robust transmitter capable of broadcasting signals over a considerable distance. This transmitter can be connected to various audio sources, including microphones and audio output from computers or televisions. The flexibility in connectivity means that users can adapt the system to different settings, ensuring that everyone in the vicinity can benefit from the enhanced audio output.

Another significant characteristic of the PFM 863 is its user-friendly design. The device features intuitive controls, making it easy for users of all ages to operate. The unit is lightweight and portable, allowing it to be easily transported from one location to another. This portability makes it an ideal choice for schools, theaters, churches, and other venues where hearing assistance is required.

In terms of technology, the PFM 863 employs advanced frequency modulation techniques to minimize interference and optimize reception. The system also includes features such as noise filtering to enhance clarity and minimize background noise, ensuring that users can focus on the audio content without distraction.

Additionally, the PFM system supports multiple receivers, allowing several individuals to benefit from the same transmission simultaneously. This feature is particularly advantageous in group settings, where multiple listeners can connect to the same audio source using their personal receivers, promoting inclusivity and enhancing the overall communication experience.

Overall, the Williams Sound PFM 863 listening system is an exemplary solution for those seeking high-quality audio assistance. Its outstanding performance, user-friendly design, and advanced technologies make it a reliable choice for enhancing communication and accessibility across various environments.
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