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PPA 275 Wide-Band FM Hearing Assistance System
Description:
The PPA 275 is an FM listening system used for large area hearing assistance.
It helps overcome background noise, reverberation, and distance from the
sound source. The T4 transmitter plugs directly into the sound system, and
broadcasts the message via FM radio signal. Listeners use the R30 to pick-up
the broadcast and listen to the speakers message.
Applications:
Houses, of worship, auditoriums, theaters, classrooms, conference rooms,
museums, parks.
PPA 275
Waa T4 Transmitter:
Dimensions, Weight: 8.45" (21.5 cm) W x 8.18" (20.8 cm) D Deviation: + 75 kHz maximum
x 1.72" (4.4 cm) H, 3Ibs. (1.5 kg) Pre-Emphasis: 75 usec
Color: Black epoxy paint with white legends RF Field Strength: Does not exceed 3 mV/m at 3 m
Rack Mount: One EIA rack space high, 1/2 space wide Nominal Range: 300-500 ft. (90-150 m)
1-2 units can be mounted in a single rack space with Audio Proc. Functions: Soft Knee Limit or Compress
optional RPK 005 (single) or Compression 10 cB add'l gain when input is -20 dB
RPK 006 (double) Rack Mount kits 20 cB add'l gain when input is -40 dB
Power: 21 VAC minimum; 26 VAC maximum, Soft Limiting > 10 dB add'l gain when input is -45 dB
50 or 60 Hz 4.8 VA nominal; 10 VA maximum; Wall Frequency Response: 30 - 16000 Hz, +1, -3 dB
mount transformer for 105 to 130 VAC included Signal to Noise Ratio: More than 70 dB below 75 kHz deviation
FCC ID: CNMT4 in Limit mode
Operating Freqs: 72.1-75.9 MHz * Note: Maximum transmitter range is achieved
10 wide-band channels, selectable using the ANT 005 coaxial antenna
Frequency Accuracy: +.005% stability, 0-50° C Warranty: 5 years*
CO T4 Transmitter Front Panel:
Power Indicator: Green LED
Audio Level Control: Rotary pot, screwdriver adjust, PPA T4 Professional FM Auditory Assistance Transmitter Williams Sound AY
used with audio level indicator lights Frequency Syitesied, Channel Selectable pias
Audio Level Indicators: 4 LED array, reads -12, -6, 0, and +6 dB Auto Adus aisioiae
RF Carrier On Indicator: Green LED indicates transmitter RF is on Power 208 848 068 sed RF Carrier
Phones Jack: 1/4" TRS (Stereo) jack © eae toa ooee ©
(14 Front Panel)
PEW ioacemacce T4 Transmitter Rear Panel:
Audio Select Switch: — Eight-section DIP switch
Audio Input: Combination 3 pin XLR, 1/4" TRS jack 000 ed input Q Model PPA T4 Audo nen FM Transmitter KA
Line Output: RCA jack, 0.6 V output impedance 1 Q sa DBAL ME pe ee ene E
FM Channel Switch: _Eight-section DIP switch (Seven used) ‘Aas See () oe ung Out FMChanne, “PENS Power VAC
Antenna Outputs: Thread Mount for “rubber duckie” flexible whip anten- SORSRORE o OR ry) © =E E] Hi
na. Can also be purchased with: To configure, see chart on top. See chartontop. 75 Ohms
1) 75 Q Coaxial Antenna (ANT 005), using
15 feet of RG-59 cable, or (14 Rear Panel)
2) Wall Mount Dipole Antenna (ANT 024),
using 25 feet of RG-59 cable.
Power Connections: = 3-pin Molex® connector
Input Levels Minimum Nominal Maximum
Microphone: 100 uV 1 mV 100 mV
Bal or Unbal Line: 10 mV 100 mV 10 V
Bal or Unbal or
70 V speaker line: 2.3 V 23 V 230 V
Williams Sound ®
(800) 843-3544 ¢ (952) 943-2252 • FAX (952) 943-2174 ¢ www.williamssound.com Gl
Helping People Hear
® 2002, Williams Sound Corp. CAT 088B
W/,
PPA R30 Receiver:
Dimensions: 3-5/8" L x 2-3/8" W x 7/8" H On/Off
(92.1 mm x 60.3 mm x 22.2 mm) Volume Switch
Weight: 4.6 oz (130 g) with batteries
Color: Gray as “7
Battery Type: Two (2) AA 1.5 V non-rechargeable Alkaline batteries (BAT 001), 14 mA nom. O
current drain, 80 hours approx. life (OR) ATE TTT
Two (2) AA 1.5 V Ni-Cad rechargeable batteries (BAT 026), 14 mA nominal cur-
rent drain, 50 hours per charge approx., recharges in 14-16 hours, uses CHG
1600 Charger or CHG 200 Charger Headphone "On" Indicator
FCC ID: CNM R30 Jack LED
Industry Canada Cert.: 13601021234A R30 Top
Operating Freq.: Pre-Tuned, Adjustable, 72 MHz - 76 MHz *
Intermediate Freq.: 75 kHz
FM Deviation: 75 kHz
De-Emphasis: 75 uS
AFC Range: + 120 kHz
Sensitivih 4 uV at 12 dB Sinad Wfiwiiiams souna
Input Overload: 20 mV
Frequency Response: 100 - 10 kHz, + 3 dB
Signal-to-Noise Ratio: 50 dB at 10 uV
Receive Antenna: Integral with earphone/headphone cord
Audio Output: 35 mW, max. at 16 Q
Output Connector: 3.5 mm mono phone jack
Earphone: Earbud-type with foam cushion (EAR 013), 3.5 mm plug, 32 Q
Warranty: Five Years, Parts and Labor. 90 days on cords, earphones, headphones,
batteries and other accessories
Notes: The R30 Receiver can be field tuned to any
of 10 wideband channels using the PLT 005
Tuning Tool.
R30 Front
Bid Specs
The R30 receiver shall be encased in a gray, polypropylene impact-resistant plastic with a single hinged coor for battery installation.
The receiver shall be a body-pack type and include an optional belt-clio 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 frequency shall be pre-tuned and adjustable to 10 wideband channels from 72-76 MHz by internal tuning coil. The receiv-
er shall operate up to approx. 80 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 75 uS de-emphasis. The receiver shall provide a
maximum output of 35 mW at 16 Ohms with an earbud-type earphone. The system’s electrical frequency response shall be 100 Hz
to 10 kHz, + 3 dB and the signal to noise ratio shall be 50 cB at 10 uV. The receiver shall have a sensitivity of 4uV at 12 dB Sinad.
The receiver shall be covered by a five years parts and labor warranty, excluding earphones, headphones, batteries, and chargers.
The receiver model shall be the Williams Sound Corp. Model PPA R30.
The FM T4 Transmitter shall be contained in a black metal, rack-mountable enclosure. A rack panel shall be available to mount up
to 2 transmitters within a single EIA rack space.
The transmitter shall provide, through low-noise circuitry, 10 wide-band frequencies between 72 MHz and 76 MHz selectable by exter-
nal DIP switches.
The transmitter rear panel shall have a combination 3 pin XLR, _ inch TRS audio input jack, an eight section DIP audio select switch,
a line out RCA jack, 0.6V output impedance @ 1KW. It shall have an eight section DIP switch (seven Used) for channel selection.
There shall also be a threaded F connector antenna output jack for an optional 75Q coaxial antenna using RG-59 cable on the back
of the transmitter.
The transmitter shall have thread mounts for securing a rubber duckie antenna through the top of the case panel.
The transmitter front panel shall have a green power LED indicator. It shall have an audio level contro! with rotary potentiometer,
screwdriver adjustable used in conjunction with a four LED array with readings -12, -6, 0 and +6dB. There shall also be a green LED
RF carrier and a _ inch TRS stereo headphone jack on the front panel.
The transmitter shall be powered by an external 12 VAC, 60 Hz, 10 VA power supply via a three pin Molex® connector. There shall
be no power switch.
The transmitter shall carry a 5 year warranty on parts and labor. The transmitter shall be a Williams Sound Corp. model PPA T4.
Williams Sound ®
(800) 843-3544 ¢ (952) 943-2252 * FAX (952) 943-2174 ¢ www.williamssound.com X
Helping People Hear