Williams Sound PA R750 Installation guide

OVERVIEW
The PPA R750 Monitor Receiver is designed for use with Williams Sound PERSONAL PA®
(PPA) Wide-band FM Transmitters. With the R750, small groups of people can listen to the FM
broadcast in a cry room, nursery, office area, or any location where a remote speaker is needed
and wiring is difficult to run.
USING THE R750 RECEIVER
Step 1: Insert the ANT 026 Antenna into the “Antenna” connection on the back of the unit.
(See Figure 2.) Make sure it is fully inserted and tightly fitted.
Step 2: Extend the antenna by grasping the tip and pulling straight upward.
Step 2: Insert the PLC 013 Plastic Clip into the hole provided. (See Figure 2.) Push the clip in
until it snaps into place.
Step 4: Lock the antenna shaft into the clip so that it will not rotate or fall over.
Step 5: Plug the AC power cord into an AC outlet and turn the power switch on.
Step 6: Make sure your PPA Transmitter is on and has an active audio source. Adjust the
volume control on the R750 until you hear the broadcast.
Note: The R750 will normally receive the FM broadcast up to 150 feet away from the
Transmitter.
Power
24VAC, CT
50-60Hz, 15W
On
Off
TREBLE BASS VOLUME
FM Receiver Model R750
This device complies with FCC Rules Part 15. Operation is subject to 
the following two conditions: (1) This device may not cause harmful 
interference and (2) this device must accept any interference that 
may be received, including interference that may cause 
undesired operation.
FCC ID: CNMR750
Williams Sound Corp. Eden Prairie, MN 55344
Williams Sound Corp.
FIGURE 1: R750 REAR PANEL FEATURES
Telescoping Antenna (ANT 026)
Antenna Connector
Plastic Antenna Clip (PLC 013).
Power On/OFF Switch
Volume, Treble, and Bass Controls
AC Power Supply
PPA R750 Monitor Receiver
FM Listening System Receiver
Williams Sound
®
Helping People Hear


Tuning Coil Access
FIGURE 2: TUNING COIL LOCATION & ANTENNA INSTALLATION
Williams Sound Corp.
10321 West 70th St., Eden Prairie, MN 55344-3446
U.S.A. 800-843-3544 / 952-943-2252 / FAX: [phone]
©1997, Williams Sound Corp. MAN 068C
OPERATING FREQUENCY (CHANNEL)
The R750 is pre-tuned to one of 10 different frequencies in the 72–76 MHz Auditory Assistance
Band. The last letter in the part number indicates the frequency. For example, a PPA R750E is
set to Channel E, 72.9 MHz. Stickers on the bottom of the PPA Transmitter and R750 Receiver
indicate the frequency they are tuned to.
The R750 frequency must match your transmitter frequency. If you experience interference on
the channel you ordered or if your receiver frequency does not match your transmitter frequency,
use the following directions to retune your R750.
TOCHANGE THE OPERATING FREQUENCY
Step 1: Make sure your transmitter has been correctly tuned to the channel of your choice.
Refer to the instructions that came with your transmitter for this procedure.
Step 2: Turn on the transmitter and begin broadcasting a signal.
Step 3: Insert a PLT 005 Tuning Wand (or similar plastic tuning wand) into the tuning coil
access on the side of the R750. (See Figure 2.)
Step 4: It is very important that you gently turn the tool COUNTER-CLOCKWISE until you
hear the signal, or until the tuning coil stops. This screws in the tuning coil as far as it
will go. Do not attempt to force it further.
Step 5: If the tuning coil hits the stop and you have not yet heard the signal, gently turn the
tuning slug CLOCKWISE until you hear the signal.
WARRANTY
The R750 is warranted against defects in manufacture for a period of five years. See the
enclosed warranty card for details.
SPECIFICATIONS
Dimensions 5-1⁄2" W x 8-3⁄8" H x 5" D
(14 cm x 21.3 cm x 12.7 cm),
Weight: 5 lbs. (1.9 kg)
Color: Black
Power: 120 VAC, 50 or 60 Hz, 25 Watts
FCC ID: CNMR750
Operating Freq: Pre-Tuned, Adjustable,
72 MHz – 76 MHz
FM Deviation: Wideband, 75 kHz, 75 µS
de-emphasis
AFC Range: ± 300 kHz
Sensitivity: 2 µV at 12 dB Sinad
Freq. Response: 100 to 10 KHz, ± 3 dB Controlled by
bass & treble
Signal-to-Noise Ratio: 50 dB at 10 µV
Receive Antenna: 39" telescoping whip (ANT 026)
Loudspeakers: 4 inch, 8 Ω,wide-range
Controls: ON/OFF rocker switch, rotary
volume, bass, and treble controls
Optional Products
Coaxial Antenna Kit ANT 005
Wall Mount Kit: SB-3 Wall/Ceiling Mount Kit
Insert Antenna
As Shown
Insert Antenna Clip
As Shown