Williams Sound FM Listening System PPA 575 - Manual (Page 3)

Personal PA ® FM Listening System, Model PPA 575
©2005, Williams Sound Corp. CAT 102B
Williams Sound ®
Helping People Hear 3
PPA T35 Transmitter
The PPA T35 transmitter shall be microprocessor controlled with push button configuration. It shall have an operating
range of up to 1000 feet. It shall have 10 wideband and 7 non-standard wideband channels operating on 72.1-75.9 MHz.
It shall have 77 narrowband channels operating on 72.025-75.975 MHz.
Front Panel:
The PPA T35 shall have a push button controlled LCD digital display. There shall be three pre-configured (selectable)
application presets: Hearing Assist, Music and Voice. Configurations for Bandwidth, Frequency, Audio Input Source
(Microphone, Line, Simplex), High Pass Filter, Low Pass Filter, Compressor Slope, Compressor Gain and RF Output
Power shall be push button controlled. The audio level shall be adjustable by push button control. There shall be a 10
LED array showing +9 to -18 at 3 dB intervals. The PPA T35 shall have a 1/4" phone jack with push button volume con-
trol. It shall have push button control for monitoring source audio or transmitted audio. It shall have an input overload
indicator. It shall have a “on” indicator and power button.
Rear Panel:
The PPA T35 shall be powered by 24 VAC power supply via a 3-pin Molex ® connector. It shall have a 75 ohm
F-connector antenna. It shall have a “rubber duckie” antenna on the top panel directly connected to the circuit board.
The transmitter shall have an RCA line output jack. It shall have a combination 1/4" phone/XLR audio input jack. It shall
have an RF “Off” timer that turns off RF signal after 1 hour of no audio activity.
The PPA T35 shall have FCC approval and be powered by UL and CSA power supply. It shall have a five-year parts and
labor warranty. It shall be compatible with Williams Sound FM equipment operating on 72-76 MHz. The transmitter
shall be a Williams Sound Corp. model number PPA T35.
PPA R19 or R19-6 Receiver
The receiver shall be encased in a blue, polypropylene impact-resistant plastic with a single hinged door for battery
installation. The receiver shall be a body-pack type and have the option for a belt-clip case for hands-free operation.
The receiver shall have a 3.5 mm mono phone jack and accommodate low-impedance mono earphones, headphones,
and neckloops telecoil couplers. The receiver shall have a combination volume control and power on/off rotator dial,
and a green LED power “on” indicator. The receiver shall be crystal controlled to reduce frequency drifting. The R19
receiver shall have 10 available channels: Two channels shall be selectable by a 2-position slide switch and pre-tuned
from 72-76 MHz. The R19-6 receiver shall have six channels pre-tuned from 72-76 MHz and adjustable by a channel
rotary dial. The receiver shall have an adjustable 3-position tone control switch to select Low (20 Hz), Mid (120 Hz), or
Hi (700 Hz) operation. The receiver shall operate up to approx. 100 hours when using 1.5 V AA Alkaline batteries, and
shall operate up to approx. 50 hours when using 1.5 V NiMH rechargeable AA batteries.
The receiver shall receive FM signals in the 72-76 MHz audio assistance band with 300 µS de-emphasis. The receiver
shall provide a maximum output of 35 mW at 16 ohms with an earbud-type earphone. The system’s electrical fre-
quency response shall be 100 Hz to 5 kHz, ± 3 dB and the signal-to-noise ratio shall be 50 dB at 10 µV. The receiver shall
have a sensitivity of 0.7 µV at 12 dB Sinad.
The receiver shall be covered by a five-year parts and labor warranty, excluding earphones, headphones, batteries and
chargers. The receiver model shall be the Williams Sound Corp. model PPA R19 or model PPA R19-6 receiver model
shall be the Williams Sound Corp. model PPA R30.
Bid Specs:
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!