Williams Sound PPA VP 37 Guide

Model PPA VP 37
Wide-Band FM Wireless Listening System
Manual and User Guide
Transmitter Model PPA T27
Receiver Model PPA R37
Optional Receiver Model PPA R38, PPA R37-8
MAN 159E

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Contents
System Overview......................................................................................3
Setting Up the PPA VP 37 ........................................................................4
Receiver Safety Information ......................................................................6
Recycling Instructions...............................................................................7
Receiver Model PPA R37 Instructions.......................................................8
Receiver Model PPA R37-8 (optional) Instructions ..................................10
Receiver Model PPA R38 (optional) Instructions......................................13
Channel Selection Chart..................................................................14
Belt Clip Installation (all Receiver models)................................................16
Using A Receiver With A Hearing Aid......................................................17
Receiver Management Suggestions .......................................................17
Receiver Battery Information...................................................................18
Troubleshooting Guide............................................................................19
Personal PA Value Pack System Specications.......................................21
PERSONAL PA Transmitter Model T27............................................21
PPA Select™ Receiver (Model PPA R37) .........................................22
Personal PA Receiver (Model PPA R37-8)........................................23
Personal PA Receiver (Model PPA R38)...........................................24
Lifetime Limited Warranty .......................................................................26
Repair Services ......................................................................................27

Model PPA VP 37 Wide-Band FM Wireless Listening System
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System Overview
Thank you for purchasing the Personal PA Value Pack System from Williams
Sound. The PPA VP 37 System is a Wideband FM Listening System which
operates in the 72-76 MHz frequency band. Designed for hearing assistance
in places of public access, the PPA VP 37 is for those who need help
overcoming background noise, reverberation, or distance from the sound
source. The versatile PPA VP 37 is easily integrated with your existing sound
system or can be used with a microphone as a stand-alone system.
The system has two principal parts: the T27 Transmitter and the PPA
R37 Receiver. Much like a miniature radio station, the Transmitter and
microphone pick up the sounds you want to hear and broadcast them over
an FM radio signal. The receivers are used to pick up the broadcast up to
1000 feet (305 m).
To avoid diculties, please read through these instructions as you begin
to use the system. Then save the manual for questions that arise as you
continue to use your Personal PA Value Pack System.
If you have any problems with this Williams Sound product, please call us
toll-free at 1-800-843-3544.
Figure 1: Overall System Diagram
LOUDSPEAKER
LINE-LEVEL OUTPUT
LINE-LEVEL INPUT
SOUND SYSTEM
AMPLIFIER
MICROPHONES
PPA T27 TRANSMITTER
PPA SELECT™ RECEIVERS
WITH EARPHONES
A184

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Setting Up the PPA VP 37
Figure 2: PPA T27 Features and Controls
A183
MIC INPUT
JACK, 3.5 MM
AUDIO LEVEL
INDICATOR
AUDIO LEVEL
CONTROL
FREQUENCY
DISPLAY (LED)
FREQUENCY
SELECTOR
LOCK/UNLOCK
CONTROL
12VAC POWER
INPUT JACK
75 OHMS ANTENNA CONNECTOR
AUDIO INPUT JACK, RCA-TYPE
(LINE LEVEL,UNBALANCED)

Model PPA VP 37 Wide-Band FM Wireless Listening System
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1. Select Location. Position the PPA T27 transmitter near the audio source
(i.e. sound system, mixer) from which it will receive audio.
2. Install the Antenna. Gently thread the ANT 021 rubber duckie antenna
onto the stud recessed in the hole on the top of the transmitter. FCC
rules allow only the use of antennas provided by Williams Sound. To use
a remote antenna supplied by Williams Sound, the antenna cap may be
removed by turning it counter-clockwise with a pliers or wrench. Please
call customer service 800.843.3544 if you have any questions.
3. Connect the Power. Locate the TFP 036 power supply cord equipped
with the 5-pin DIN connector, then plug the connector into the “Power
In” jack located in the back of the T27. Plug the power supply into the
AC outlet. On power up, the number “8” will scroll across the T27 display
while the system initializes. The system will then display the default
system frequency (72.9 MHz) or the last selected frequency set by the
user.
4. Select the Frequency. The T27 has 17 available channels in the 72-76
MHz band. By default, the T27 frequency is set to 72.9 MHz. To change
the frequency on the T27, press and release the down “ ” or up “
” frequency selector button until the desired frequency is displayed. After
3 seconds, the frequency selection will be set, and the audio will begin
transmitting on the new frequency.
NOTE: You can LOCK this selection to prevent others from accidently
changing the frequency.
To LOCK the desired frequency, press and hold both down “ ” and up
“ ” frequency selector buttons for 3 seconds until the word “Loc” appears
on the display. The frequency is now locked. Should the user press the
frequency selector button while in “Lock” mode, the word “Loc” will be
displayed for 2 seconds.
To UNLOCK the desired frequency, press and hold both down “ ” and up
“ ” frequency selector buttons for 3 seconds until the transmitter displays
”Un” then “Loc” on the display. The frequency is now unlocked. The user is
now free to change the frequency on the T27 as needed
5. Connect the Audio Source. On the back of the T27, an RCA-type
“Audio In” jack is available for connecting a line-level, unbalanced audio
source. On the front of the T27, a 3.5 mm “Mic Input” jack is available
to connect a Williams Sound electret microphone. Connect the desired
audio source to the T27 transmitter and proceed to step 6.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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6. Adjusting the Audio Source. With the audio source playing, use a small
screwdriver or tuning wand to rotate the “Adjust” control on the front of
the T27:1) clockwise to increase the audio level; or 2) counterclockwise to
decrease the audio level. Refer to the audio “Level” indicator LED on the
front of the T27 as you make your adjustments:
Audio Level Indicator LED
Never On = Audio source is TOO LOW.
Blinks occasionally = Audio source is OPTIMAL.
Always on = Audio source is TOO HIGH.
7. Listen with an FM Receiver.
IMPORTANT: The FM receiver being used with the T27 transmitter will
need to be on the same frequency as the transmitter.
Install the receiver batteries, plug in the earphone, turn on the receiver
and walk around the listening area. The signal should be clear and quite
loud when the volume is turned up. See pages 10-13 for detailed receiver
instructions.
Receiver Safety Information
HEARING SAFETY:
CAUTION!
The receiver is designed to amplify sounds to a high volume level which
could potentially cause hearing damage if used improperly.
To protect your hearing and the hearing of others:
1. Make sure the volume is turned down before putting on the earphone or
headphone before adjusting the volume to a comfortable level.
2. Set the volume level at the minimum setting that you
need to hear.
3. If you experience feedback (a squealing or howling sound), reduce the
volume setting and move the microphone away from the earphone or
headphone.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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4. Do not allow children or other unauthorized persons to have access to
this product.
BATTERY SAFETY AND DISPOSAL:
CAUTION!
The receiver may be supplied with alkaline batteries. Do not attempt
to recharge alkaline batteries, which may explode, release dangerous
chemicals, cause burns, or other serious harm to the user or product.
PACEMAKER SAFETY:
CAUTION!
1. Before using the receiver with a pacemaker or other medical device,
consult your physician or the manufacturer of your pacemaker or other
medical device.
2. If you have a pacemaker or other medical device, make sure that you are
using this product in accordance with safety guidelines established by
your physician or the pacemaker manufacturer.
Recycling Instructions
Help Williams Sound protect the environment! Please take the time to
dispose of your equipment properly.
Product Recycling
Please do NOT dispose of your Williams Sound equipment in the
household trash. Please take the equipment to an electronics recycling
center; OR, return the product to the factory for proper disposal.
Battery Recycling
Please do NOT dispose of used batteries in the household trash. Please
take the batteries to a retail or community collection point for recycling.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Receiver Model PPA R37 Instructions
PPA R37 is a 17-channel receiver operating on the 72-76 MHz bandwidth.
Features: seek-button channel selection, channel-lock capability, battery-
saving sleep mode, on/o volume control, power/low battery indicator,
stereo/mono earphone jack.
Figure 3: PPA R37 Controls
ON/OFF, VOLUME
CONTROL SWITCH
EARPHONE
JACK
"ON" / LOW BATTERY/
FLASH CODE INDICATOR
OFF
A116
Operating the Receiver
1. Insert two (2) AA batteries ensuring correct polarity. If rechargeable NiMH
batteries are to be used, make sure the Alkaline/NiMH switch inside the
battery compartment is set to NiMH before charging. See Figure 4.
2. Insert headphone, earphone or neckloop into the stereo output jack.
3. Turn receiver on by turning up the volume control. The green power LED
will blink and then stay on continuously.
4. Set receiver frequency to match transmitter frequency. Press the Channel
Seek button inside the battery compartment once to seek an active
transmitter. See Figure 4. If more than one transmitter is being used, you
will need to push the seek button additional times until you locate the
signal you want to hear. The receiver will retain the channel setting when
the unit is turned o.
5. To lock or unlock a selected channel, turn the power o. While holding the

Model PPA VP 37 Wide-Band FM Wireless Listening System
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seek button, turn the power back on. When locked,the receiver will remain
on the current channel, regardless of channel seek button presses.
LED Flash Codes
Light Code Indicates Description
1 blink Channel locked Seek press remains on current channel
2 blinks Channel unlocked See press tunes to next channel present
Figure 4: Battery and Channel Selections
ALKALINE/
NiMH SWITCH
CHANNEL
SEEK BUTTON
AA
AA
–
+
+
–
Channel
Seek
A117
3 blinks Channel unlocked; no other
channels present
Seek press attempts to nd another
channel
On-O-
On-O...
(continuous)
Batteries are low Batteries need to be replaced or
recharged
Fade-on,
Fade-o...
(continuous)
No transmitter present on current
channel
Sleep/Power Save mode (extends
battery life)

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Receiver Model PPA R37-8 (optional) Instructions
The PPA R37-8 is an eight channel receiver, operating on 72-76 MHz
bandwidth. It features a channel selection knob, on/o volume control, LED
power and low battery indicator, and an earphone jack (See Figure 5).
Figure 5: PPA R37-8 Controls
Battery Installation
Install two (2) AA alkaline or NiMH rechargeable batteries. Open the battery
compartment by lifting the tab on the back of the receiver with a nger. To
remove depleted batteries, pull up on the fabric strip. IMPORTANT: If Alkaline
(or non-rechargeable) batteries are being installed, slide the battery selection
switch above the battery compartment to the “Alkaline” position. If installing
A565
ON/OFF, VOLUME
CONTROL DIAL
HEADPHONE
JACK
"ON"/LOW
BATTERY
INDICATOR
CHANNEL
SELECTOR
KNOB
OFF

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NiMH (or rechargeable) batteries, slide the battery selection switch to the
“NiMH” position. Press the batteries into place over the fabric strip. Be sure
to observe proper polarity (+/-). Damage due to improper battery installation
may void the warranty on the product. Close the battery door. When the
sound becomes weak or distorted, replace or recharge the batteries. NOTE:
The red LED “ON” indicator on top of the unit will ash to indicate low
battery.
Connecting Earphones
Plug the earphone into the “Headphone” jack on the top of the unit. Only
monophonic earphones will operate properly. If stereo headphones are
used, sound will be heard only in one side. Williams Sound evaluates each
earphone and headphone used with the PPA R37-8 receiver; we can
only assure optimum performance when Williams Sound earphones and
headphones are used.
Operating the Receiver
Turn the receiver on by rotating the Volume control knob. The ON indicator
should illuminate RED. Refer to the channel selection chart in Figure 6 to
choose from 8 standard frequencies. Turn the channel selector knob to the
desired channel.
IMPORTANT: Make sure the receiver frequency matches the transmitter
frequency!
Adjust the volume to a comfortable
listening level. To turn the receiver o,
rotate the Volume control knob to the
left until it clicks o. The ON indicator
should not be lit. To prolong the battery
life of the unit, turn the receiver o when
it is not in use.
Figure 6: Channel Selection Chart
Freq. (MHz) Channel R37-8 CH
72.1 A 1
72.2 K
72.3 B 2
72.4 N
72.5 C
72.6 O 3
72.7 D
72.8 P 4
72.9 E
74.7 I 5
75.3 J
75.4 R 6
75.5 F
75.6 S
75.7 G 7
75.8 T
75.9 H 8

Model PPA VP 37 Wide-Band FM Wireless Listening System
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• The “ON”/LOW BATTERY INDICATOR (Figure 2) is used to indicate: power,
low batteries or sleep mode. Refer to ash codes chart on the next page.
• The stereo headphone jack accepts either stereo or mono headphones or
earphones.
• The adjustable squelch (Figure 1) can help reduce user fatigue by turning
o the audio when the signal becomes weak. If the operator is annoyed or
fatigued by noise, turn the squelch up. This will reduce the eective range of
the receiver as a trade-o to listener comfort. Similarly if the operator needs
more range and can tolerate the noise, turn the squelch down*.
To adjust the squelch: using a small screwdriver, turn the knob to the right for
more squelch; left for less squelch.
*As the radio signal decreases, the noise present at the headphones increases. The squelch circuit senses the signal
level and turns o the audio as the noise increases. More squelch means this trigger point occurs earlier; less squelch
means it occurs later (or not at all, with no squelch). Apparent range is also aected. More squelch reduces the
apparent range; less squelch increases the apparent range.
PPA R37-8 LED Flash Codes
LIGHT CODE INDICATES REMEDY
On-O-On-O
(continuous) Low Batteries Replace or recharge batteries
Fade-on, Fade-
o
(continuous)*
No transmitter
on current
channel*
After 6 min, Sleep/
power save mode
starts (extends
battery life)*
On Steady Unit is operating
normally n/a
*The R37-8 returns to normal operation automatically
when a transmitter is re-established on the same
channel.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Receiver Model PPA R38 (optional) Instructions
The PPA R38 is a 17-channel receiver, operating on 72-76 MHz bandwidth.
It features an OLED high-resolution screen, stereo headphone jack, digital
volume controls, 4-step battery level indication, channel or frequency
indication, step/seek function (allows user to increment channel manually, or
seek to the next active channel, sleep mode/auto-o (saves battery power)
and soft audio turn-on.
1. Open the battery compartment. Slide the battery selection switch to the
correct position for the type of batteries that will be used. Use “Alkaline” for
non-rechargeable batteries, “NiMH” for rechargeable NiMH batteries (only).
IMPORTANT: If the battery switch is not in the correct position, damage may be
caused to the unit.
Battery Compartment
A311
ALKALINE/NiMH
BATTERY SWITCH
CAUTION: RECHARGE
ONLY NiMH BATTERIES
BATTERY REMOVAL
FABRIC STRIP
2. Install the AA batteries. Be sure to observe proper polarity (+/-). Damage
due to improper battery installation may void the warranty on the product.
The power button on top of the unit will ash when the batteries are getting
low; you may continue to use until the unit quits operating, then replace or
recharge the batteries.
3. Turn the unit on: press and hold the power button for three seconds. The
power button will illuminate green.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Top of Receiver
A428
3.5mm
STEREO/MONO
HEADPHONE
JACK
R38 TOP
POWER BUTTON/
LOW BATTERY
INDICATOR
4. Select the desired operating channel/frequency on the transmitter. Up to eight
transmitters can operate simultaneously on dierent channels (see 8 channel
mode in chart). (Fig. C)
5. Change the receiver to the channel/frequency chosen in step 4. Push the
menu button once and select the channel by pushing the left or right arrow
buttons. (Fig. D). If the currently broadcasting channel is unknown, use the
seek function to nd it, by pushing and holding the right or left arrow button.
The receiver will stop when it nds an active channel. If multiple channels are
active, repeat the seek function until the desired channel/frequency is found.
Channel Selection Chart
17 Ch Mode Letter Freq (MHz) 8 Ch Mode
1 A 72.1 1
2 B 72.3 2
3 O 72.6 3
4 P 72.8 4
5 I 74.7 5
6 R 75.4 6
7 G 75.7 7
8 H 75.9 8
9 C 72.5
10 K 72.2
11 N 72.4
12 D 72.7
13 E 72.9
14 J 75.3
15 S 75.6
16 T 75.8
17 F 75.5
A376

Model PPA VP 37 Wide-Band FM Wireless Listening System
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6. To access additional settings, push-and-hold the menu button. The receiver
will display “Loading Advanced Setup”. After viewing or changing a setting,
push the menu button again to access the next setting. If no buttons are
pushed during the screen time-out period (5, 30 or 60 seconds, adjustable in
menu), the display returns to the main screen and then shuts o to conserve
battery power. The receiver remains on (also see step 11). (Fig. D, Fig. E)
7. Plug in the earphones/headphones into the headphone jack (Fig. B). The
earphone/headphone cord is the antenna.
8. Adjust the volume by pushing the left or right arrow buttons (Fig D).
9. To lock (or unlock) all of the settings (except volume), push and hold the left
and right arrow buttons. Three dashes will appear and then disappear. Keep
holding the buttons until the last dash disappears, and the screen prompts to
push the menu button. After pushing the menu button the receiver will display
“Settings Locked (or Unlocked)”.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Belt Clip Installation (all Receiver models)
To Install:
Position the belt clip on the rear of the PPA R37, PPA R37-8, or PPA R38
receiver as shown in Figure 6. Turn the belt clip 180º left or right as shown in
Figure 6. The belt clip is now installed and ready for use.
To Remove:
Turn the belt clip 180º so the edge points toward the top of the unit as
shown in Figure 6. Gently pull the belt clip away from the unit to remove.
Figure 6: Belt Clip Installation and Removal
A119
A119
Earpad Cleaning for Earphones and Headphones
Do not immerse the earphone in water or other cleaning agent. Foam pads
may be removed and washed with a mild laundry soap solution, rinsed
thoroughly, and air dried. You may also opt to purchase new foam pads.
Call Customer Service for ordering information: 1-800-843-3544

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Using A Receiver With A Hearing Aid
Williams Sound PPA R37, PPA R37-8 and PPA R38 receivers can be used
with hearing aids using three dierent methods:
Neckloop Telecoil Coupler
Neckloops are cords which hang around the neck and couple magnetically
with T-Coil equipped hearing aids.
Silhouette Telecoil Coupler
These telecoil couplers are worn behind the ear, right next to telecoil-
equipped hearing aids.
Direct Audio Input (DAI) Cord
Direct Audio Input cords can be used with compatible hearing aids as well
as with Cochlear Implant Processors.
Receiver Management Suggestions
Dierent types of facilities will use dierent approaches for receiver
management and earphone sanitation. Below are some options that
customers have used successfully.
• Regular users purchase their own receiver and take care of their own
batteries and earphone.
• Some facilities label the receiver and earphone with the names of regular
users so each person uses the same receiver and earphone.
• Ushers issue receivers to people who request them. Earphones are
sanitized after use. Foam ear cushions can be replaced or washed with
a mild detergent, rinsed thoroughly and air-dried. The EAR 022 Surround
Earphone can be sanitized with an alcohol pad.
• The receivers can be stored in a multiple compartment storage case with
a credit card or driver’s license left as collateral for the receiver.
• Regular users purchase their own earphone or headphone and bring them
to use with receivers at the facility.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Receiver Battery Information
Single Use Batteries
When the battery is low on the PPA R37 or PPA R37-8, the power LED
on the top of the unit will blink. On the PPA R38, the battery symbol on
the OLED screen will blink. With other (or legacy) receivers, if the sound
becomes weak or distorted, the battery is low. Replace the battery. The
indicator light may still be on, even with a battery that is weak. Do not leave
dead batteries in the receivers. Battery corrosion is not covered by the
Williams Sound Limited Lifetime Warranty.
Recommended Batteries for Receivers
• BAT 001 AA non-rechargeable alkaline batteries
• BAT 026 AA rechargeable NiMH only
Battery Life
PPA R37, PPA R37-8 and PPA R38 receivers:
• 50 hours for BAT 001 AA non-rechargeable alkaline batteries
• 32 hours for BAT 026 AA rechargeable NiMH batteries
!! IMPORTANT WARNINGS !!
DO NOT ATTEMPT TO RECHARGE ZINC CARBON (“HEAVY DUTY”),
ALKALINE, OR LITHIUM BATTERIES!
DO NOT ATTEMPT TO RECHARGE SINGLE-USE BATTERIES!
These batteries may heat up and explode, causing possible injury
and damage to the equipment. Avoid shorting the plus and minus
battery terminals together with metal objects. Battery damage and
burns can result! Use only Williams Sound supplied chargers and
rechargeable batteries!
Further Suggestions
Receivers should NOT be left charging continuously when not in use.
Receivers should always be turned OFF while charging.

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Troubleshooting Guide
Read through the manual and user guide carefully to verify proper
setup and installation of your system.
Transmitter frequency display (LED) not lit.
• Make sure the wall transformer is plugged into the transmitter.
• Make sure the electrical outlet is on.
No sound through receivers.
• If some of the receivers work, but others don’t, check for bad batteries or
earphones on the receivers that aren’t working.
• Check to see that the receiver frequency matches the transmitter frequency.
On the transmitter, the frequency is illuminated on the LED panel on the
front of the unit. On the receiver there may be a sticker on the inside of the
battery door of the receiver. If these frequencies do not match, see Select
the Frequency Instructions on page 6 (transmitter) and page 11 for the R37,
page 13 for the R37-8 or page 16 for the PPA R38.
• If none of the receivers work, check to see if the power is connected to
the transmitter and the frequency display on the front of the transmitter is
illuminated.
• Check to see if the transmitter is connected properly to the sound system.
See page 6 - 7.
• Turn the screwdriver-adjust audio input level control on the front panel of
the T27 transmitter clockwise to increase the audio level. Make sure that
the audio light is ashing occasionally but not continuously.
• If you are not using an input signal from a sound system, make sure the
Williams Sound microphone is plugged into the “Mic” jack on the front of
the T27 transmitter.
• Make sure the antenna is installed and connected properly. See page 5.
Insucient range, good reception near transmitter, poor at a distance
• Check to see if the antenna was installed correctly. If not, correct or
replace the antenna. The signal should be clearly audible at least 100 ft
with line of site to transmitter antenna.
• Check to make sure no other transmitters (or other devices) are
transmitting on the same frequency (channel).

Model PPA VP 37 Wide-Band FM Wireless Listening System
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Sound through receivers is loud, but distorted. Noise (room noise or elec-
tronic noise) seems to grow after talking stops. Audio Indicator Light is
continuously on.
• Turn the screwdriver-adjust audio level control on the front of the T27
transmitter counter-clockwise to decrease the audio level. The audio
indicator light should ash occasionally, but not be lit continuously.
Sound through the receivers is weak and noisy.
• Turn the screwdriver-adjust audio level control located on the T27 front
panel clockwise to increase the input signal strength. The audio indicator
light should ash occasionally.
• Increase the input signal level from the sound system.
Buzzing or humming noise in sound system.
• There is nothing wrong with the T27 Transmitter. One or more pieces
of equipment in the sound system are being disturbed by RF (Radio
Frequency) signals produced by the T27. The most likely suspects are
the amplier, mixer, or tape deck. The RF energy gets into the other
equipment primarily through the power cord, speaker wires, or unshielded
inputs, all of which can act as antennas. Try the following steps:
• Move the Transmitter away from the other sound equipment.
• Make sensitive equipment more immune to RFI/EMI. The
manufacturers of your audio equipment may oer application
notes for this purpose. Williams Sound oers a document giving
suggestions for improving RF immunity in existing audio equipment.
(Technical Bulletin: Buzz Or Hum In The Sound System, FRM 531)
Unless you have the necessary technical skills, this is best left to a
qualied electronics repair technician.