Williams Sound PFM 350 RCH 사용자 설명서

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©2006, Williams Sound Corp.  MCAT 041B

Maximize a student’s ability to listen with the Personal FM System 350 RCH from Williams Sound.
Personal FM systems deliver the teacher’s message directly to the student’s headphones by way of
FM signal, eliminating background noise and other distractions. It’s perfect for classrooms, job
training, consultation and more. Portable, no wire, no hassle. Each PFM 350 RCH system has a
range of up to 150 feet, and will operate up to 60 hours at one time. Versatile 3.5 mm jack allow
for a variety of earphone and headphone options, or equip it with a neckloop and it is compatible
with most telecoil-equipped hearing aids. The PFM 350 RCH includes an R31 receiver, which fea-
tures a sensitive environmental microphone: this gives the listener more flexibility on what they
want to hear. By turning on the environmental mic, they can listen to a nearby classmate speak
more clearly.  Each PFM 350 RCH system includes a CHG 200A drop-in style charger for charging up
to (4) AA BAT 026 batteries (included).

Dimensions:

3-5/8" L x 2-3/8" W x 7/8" H (92.1 mm x 60.3 mm x 22.2 mm) 

Weight:

4.4 oz (125 g) with battery

Color:

Royal blue, shatter-resistant polypropylene

Battery Type:

Two (2) AA 1.5 V non-rechargeable Alkaline batteries (BAT 001),
70 mA nominal current drain, 30 hours approx. life
(OR) Two (2) AA 1.5 V NiMH rechargeable batteries (BAT 026), 70
mA nominal current drain, 20 hours per charge approx., recharges
in 14–16 hours, uses CHG 200 or CHG 1600 Charger

Operating Freq’s:

Selectable, 16 channels, 72.1 – 75.9 MHz*, internal rotary switch

Stability:

± .005%, frequency synthesized, crystal reference, PLL

Modulation:

Wide-band FM, 75 kHz pk, 75 µS pre-emphasis

RF Output:

8000 µV/m at 30 m, max., 40 mW  typical

Freq Response:

200 to 10 kHz, + 3 dB at 1% max. THD

Signal-to-Noise  Ratio: 

55 - 60 dB, with R31 or R32 Receiver

Microphone Gain Control:

45 dB maximum, 18 dB minimum

Transmit Antenna:

Integral with 39" microphone cord

Microphone:

Electret type, 39" cord, 3.5 mm mono phone plug

Controls:

On/Off switch, slide-type; Microphone Mute Switch, slide-type;
Compression Selector 1:1 or 2:1 with internal selectable jumper

Mic Connector:

3.5 mm mono phone jack

Compatible Receivers:

PPA R35, PFM R31, PFM R32

Approvals:

FCC, Industry Canada, RoHS, WEEE

Warranty:

5 years, parts and labor (90 days on accessories)

Note:

FCC regulations, section 15.21, requires the user to comply with
the rules of transmitter operation.  Any changes or modifica-
tions made by the user not expressly approved for compliance
may result in the loss of all privileges and authority to operate
the equipment.

*DISCLAIMER: FCC RULES LIMIT USE OF THIS EQUIPMENT TO AUDITORY ASSISTANCE
FOR THE HANDICAPPED.