Williams Sound R7-4 Installation Guide download pdf (Page 27)

Your Authorized Williams Sound Dealer Is:

Williams Sound Corp.

10399 West 70th St., Eden Prairie, MN 55344-3459

U.S.A. 800-328-6190 / 952-943-2252 / FAX: 952-943-2174

www.williamssound.com

Pro Wide–band System, Model PPA 250 SPECIFICATIONS

PERSONAL PA Transmitter Model T4

Model PPA T4 Auditory Assistance FM Transmitter

Line Out FM Channel,

Power

Power: 24 VAC,

50-60 Hz, 10VA

Williams Sound Corp., Minneapolis, MN USA

(XLR) Bal. Mic

Bal./Unbal line or 70V

(TRS) Bal./Unbal .

Line or 70V

Audio Input

Antenna

75 Ohms

Plug

Audio Select

See chart on top.

To configure, see chart on top.

12345678

Phones

PPA T4 Professional FM Auditory Assistance Transmitter

Williams Sound

Power -12dB -6dB 0dB +6dB

Audio Level

Increase

Decrease

Too Hi

Audio Adjust

RF Carrier

Frequency Synthesized, Channel-Selectable

AFC Range: ± 300 kHz

Sensitivity: 2 µV at 12 dB Sinad with squelch defeated

Squelch: Squelches at 10 µV for min. 50 dB S/N ratio

Input Overload: 20 mV

Frequency Response: 100 – 10 kHz, ± 3 dB

Signal-to-Noise Ratio: 50 dB at 10 µV

Receive Antenna: Integral with earphone/headphone cord

Audio Output: 250 mW, max. at 16 Ohms

Output Connector: 3.5 mm mini phone jack, also serves as a

charging jack for rechargeable battery

Earphone: Earbud-type with foam cushion,

3.5 mm plug, 32 Ω

Note: The R7 Receiver can be field tuned to any of

10 wideband channels using the PLT 005

Tuning Tool.

PERSONAL PA Receiver, Model PPA R7

Dimensions & Weight: 3-5/8" L x 2-3/8" W x 7/8" H

(92.1 mm x 60.3 mm x 22.2 mm)

3.2 oz (90 g) with battery

Color: Gray

Battery Type: 9 Volt, Eveready 216 Carbon Zinc,

Eveready 522 Alkaline, or BAT 003 NiMH

Battery Drain: 14 mA, nominal

Battery Life: 10 hours with Eveready 216

32 hours with Eveready 522

6 hours/charge with BAT 003

FCC ID: CNM R7Y

Operating Freq.: Pre-Tuned, Adjustable, 72 MHz - 76 MHz *

Intermediate Freq.: 70 kHz

FM Deviation: 75 kHz

De-Emphasis: 75 µS

Dimensions, Weight: 8.45" (21.5 cm) W x 8.18" (20.8 cm) D

x 1.72" (4.4 cm) H, 3lbs. (1.5 kg)

Color: Black epoxy paint with white legends

Rack Mount: One EIA rack space high, 1/2 space wide

1–2 units can be mounted in a single rack

space with optional RPK 005 (single) or

RPK 006 (double) Rack Mount Kits

Power: 21 VAC minimum; 26 VAC maximum,

50 or 60 Hz 4.8 VA nominal; 10 VA maximum;

Wall mount transformer for 105 to 130 VAC

included

FCC ID: CNMT4

Operating Freqs: 72.1–75.9 MHz *

10 wide–band channels, selectable

Frequency Accuracy: ±.005% stability, 0-50˚ C

Deviation: ± 75 kHz maximum

Pre-Emphasis: 75 µsec

RF Field Strength: Does not exceed 8 mV/m at 3 m

Nominal Range: 300-500 ft. (90-150 m)

Audio Proc. Functions: Soft Knee Limit or Compress

Compression 10 dB add’l gain when input is –20 dB

20 dB add’l gain when input is –40 dB

Soft Limiting > 10 dB add’l gain when input is –45 dB

Frequency Response: 30 – 16000 Hz, +1, -3 dB

Signal to Noise Ratio: More than 70 dB below 75 kHz deviation

in Limit mode

Note: Maximum transmitter range is achieved

using the ANT 005 coaxial antenna

Power Indicator: Green LED

Audio Level Control: Rotary pot, screwdriver adjust,

used with audio level indicator lights

Audio Level Indicators: 4 LED array, reads -12, -6, 0, and +6 dB

RF Carrier On Indicator: Green LED indicates transmitter RF is on

Phones Jack: 1/4" TRS (Stereo) jack

T4 Transmitter Front Panel

T4 Transmitter Rear Panel

Power Connections: 3-pin Molex

connector

Input Levels Minimum Nominal Maximum

Microphone 100 µV 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

IMPORTANT: If you choose to connect to 70 Volt Speaker line,

be certain to set the Audio Config switch correctly. Severe

damage will occur if you do not.

Audio Select Switch: Eight–section DIP switch

Audio Input: Combination 3-pin XLR, 1/4" TRS jack

Line Output: RCA jack, 0.6 V output impedance 1000 Ω

FM Channel Switch: Eight–section DIP switch (Seven used)

Antenna Outputs: Hard-wired 75 Ω Coaxial Antenna (ANT 005)

uses RG-59 cable, 400 ft. (122 m) max.

cable length

* Note: FCC Rules limit the use of the 72–79 MHz band to hearing assistance for the handicapped only.

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Williams Sound R7-4 Installation Guide Page 27

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