Tuning Coil Access
F
IGURE
2: T
UNING
C
OIL
L
OCATION
& A
NTENNA
I
NSTALLATION
Williams Sound Corp.
10321 West 70th St., Eden Prairie, MN 55344-3446
U.S.A. 800-843-3544 / 952-943-2252 / FAX: 952-943-2174
© 1997, Williams Sound Corp. MAN 068C
O
PERATING
F
REQUENCY
(C
HANNEL
)
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.
T
O
C
HANGE
T
HE
O
PERATING
F
REQUENCY
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.
W
ARRANTY
The R750 is warranted against defects in manufacture for a period of five years. See the
enclosed warranty card for details.
S
PECIFICATIONS
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
