Williams AV PPA T46 User manual

PPA T46
Personal PA®72-76 MHz Body Pack Transmitter
USER Manual
MAN 175F

2
PPA T46 Personal PA 72-76 MHz Transmitter
Contents
Safety Warnings.................................................................................................................................................................................................3
System Overview..............................................................................................................................................................................................3
Recycling Instructions......................................................................................................................................................................................3
Transmitter Applications .................................................................................................................................................................................3
Important Note about OLED Care...............................................................................................................................................................4
Features...............................................................................................................................................................................................................4
Note on Interference .......................................................................................................................................................................................4
Quick Setup ........................................................................................................................................................................................................4
Basic Setup........................................................................................................................................................................................................ 6
Advanced Setup................................................................................................................................................................................................7
Dual-Preset Mode............................................................................................................................................................................................ 8
Specifications.................................................................................................................................................................................................... 9
Troubleshooting ..............................................................................................................................................................................................10
Supported Microphones...............................................................................................................................................................................10
Limited Lifetime PLUS Limited Warranty................................................................................................................................................... 11

3
PPA T46 Personal PA 72-76 MHz Transmitter
Safety Warnings
HEARING SAFETY
CAUTION!
Many Williams AV receivers are 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—only then adjust 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.
4. Do not allow children or other unauthorized persons
access to this product.
BATTERY SAFETY AND DISPOSAL
CAUTION!
Williams AV T46 transmitters are supplied with non-
rechargeable alkaline batteries. Do not attempt to recharge
non-rechargeable batteries; they may explode, release
dangerous chemicals, cause burns, or cause other serious
harm to the user or product.
PACEMAKER SAFETY
CAUTION!
If you have a pacemaker or other medical device, make sure
that you are using the Williams AV transmitter in accordance
with safety guidelines established by your physician or the
pacemaker/medical device manufacturer.
Servicing or attempting to service this device will void the war-
ranty
Refer servicing to qualified personnel. Servicing is required
when the system has been damaged in any way: if liquid has
been spilled or objects have fallen into the unit, if the unit
has been exposed to moisture, if the unit does not operate
normally, or if the unit has been dropped.
System Overview
Much like a miniature radio station, the PPA T46 transmitter
broadcasts over an FM radio signal. Receivers are used to pick up
the broadcast up to 150 feet away. The system helps large or small
groups overcome background noise and distance to
clearly hear the speaker.
The PPA T46 FM transmitter broadcasts voice and/or
audio programs on one of 17 available channels, 72-76
MHz. Listeners use PPA R37, R37-8, or R38 receivers
equipped with headphones, earphones, or neckloops
to hear the broadcast.
The PPA T46 features a convenient, dual preset mode
that allows users to set separate channel/volume/auxiliary gain
levels for each preset and then toggle back and forth between
them. The OLED user interface on the PPA T46 is an easy-to-
read digital display and active read-out. The unit also features
microphone and auxiliary inputs, push-button on/o/mute controls,
settings lock and selectable compression.
To avoid diculties, please read through these instructions, and
keep them for reference.
Recycling Instructions
Help Williams AV protect the environment! Please take the time to
dispose of your equipment properly.
Product Recycling Instructions:
Please do NOT dispose of your Williams AV 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 Instructions:
Please do NOT dispose of used batteries in the household trash.
Please take the batteries to a retail or community collection point
for recycling.
Transmitter Applications
· Tours
· Schools
· Hearing Assistance
· Conference Rooms
• Interpretation

4
PPA T46 Personal PA 72-76 MHz Transmitter
Important Note about OLED Care
The PPA T46 must be powered o before removing the
batteries. Failure to do so may decrease the life of the OLED
display.
Features
Sleek, ergonomic design
Range of up to 150’ (with PPA R37 receiver and compatible
Williams AV microphone)
1.25” OLED interface displays:
· master volume level · channel/frequency
· mic mute · settings lock
· battery level · settings menus
Accepts electret mic with 3.5mm mono plug and audio
source (MP3, CD player)
Belt clip for hands-free operation
17-channel selectable, wideband, 72-76 MHz
Digitally synthesized frequencies
Easy-to-use menu-access controls:
· microphone and auxiliary levels
· 8 or 17-channel mode selection
· frequency/channel number
· compression (1:1 or 2:1)
· display settings
Lifetime PLUS Limited Warranty(90 days on accessories)
Meets ADA Accessibility guidelines
Note on Interference
Interference occurs when similar frequencies are selected
for FM transmitters operating within range of each
other.Interference can produce noise or crosstalk, and
reduce the receiver’s range from the transmitter.
Williams AV channel numbers 1-8 have been carefully
selected so that they do not cause interference. Up to eight
PPA T46’s can operate simultaneously in the same area
on dierent channels. If this is desired, set each T46 to
8-channel mode, and select a dierent channel number for
each.
If you experience interference while using your PPA T46
transmitter, try changing to another transmission channel.
To help find an unused a channel, an R38 receiver’s seek
function can be used to identify the frequencies of other
transmitters operating in the area that may be causing the
interference.
Quick Setup
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). (FIG. A) IMPORTANT:
If the battery switch is not in the correct position, damage may be
caused to the unit.
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 battery icon on the display
and the “Power On” LED on top of the unit will flash when the
batteries are getting low; you may continue to use until the unit
quits operating, then replace or recharge the batteries.
(Figure. A)
Figure A: Battery Compartment
A311
ALKALINE/
NiMH SWITCH
3. Plug in the microphone cord (sold separately) using the “Mic
Jack” on top of the transmitter (Figure B). Do not curl or wrap
the microphone cable. The microphone cable is also the
transmitting antenna.
4. Optionally, plug in a desired audio source such as a CD or
MP3 player using the “Auxiliary Input” jack (WCA 087 stereo
auxiliary input cable included). If mic and auxiliary sources
are used together, the audio will be mixed. If only an auxiliary
source is desired, the mic can be muted. Do not remove the
mic from the “Mic Jack.” The microphone cable is also the
transmitting antenna. (Figure B)
5. Turn the unit on: press and hold the “POWER ON/OFF/MUTE”
button for three seconds. The “Power On” indicator will
illuminate green. (Figure B)
Figure B: Top of Transmitter
T46 TOP
POWER ON/OFF,
MUTE BUTTON
AUXILIARY
INPUT JACK
MIC
JACK
POWER "ON",
LOW BATTERY
LED
A310

5
PPA T46 Personal PA 72-76 MHz Transmitter
6. Select the desired operating frequency. Refer to
the following channel selection chart. Make sure the
transmitter and receiver channels match.
The frequencies in 8-channel mode correspond to the
8-Ch. column shown in FIG. C. This preset eight channel/
frequency selection is the only configuration that will allow
simultaneous eight channel use.
Figure C: Channel Selection Chart
17-Ch. Mode Freq. (MHz) 8-Ch. Mode
1 72.1 1
2 72.3 2
3 72.6 3
4 72.8 4
5 74.7 5
6 75.4 6
7 75.7 7
8 75.9 8
9 72.5
10 72.2
11 72.4
12 72.7
13 72.9
14 75.3
15 75.6
16 75.8
17 75.5
7. Change the transmitter to the desired channel. To access
the channel setting, push the menu button until you see
the channel displayed. Change the channel by pushing
the left or right arrow buttons. Push the menu button to
save the channel. (Figure D, Figure E) Note: To choose by
frequency, see Advanced Settings.
8. To access additional settings, push the menu button
repeatedly until you see the setting you want. If no buttons
are pushed, the screen will time-out and shut o.
Figure D: Menu Buttons
T46 FRONT
LEFT
ARROW
BUTTON RIGHT
ARROW
BUTTON
MENU
BUTTON
OLED
DISPLAY
PPA T46
Figure E: Menu Display
A312
MIC + AUX
AUDIO LEVEL
MIC MUTED SETTINGS
LOCKED
TRANSMIT
CHANNEL
BATTERY
LIFE
9. To install the belt clip on the rear of the T46, position the belt
clip on the back of transmitter. Turn the belt clip 180˚ left or right
to secure the clip. The transmitter can now be clipped onto a
belt. To remove, turn the belt clip 180˚ so the open end of the
clip points up, and gently pull the belt clip o. (FIG. F)
Figure F: Belt Clip Installation
A119
A119
10. Position the headset microphone boom as close to the
speaker’s mouth as possible without actually touching. Lapel
clip microphones should be attached to a collar or lapel, as
close to the speaker’s mouth as possible.
11. When you pause from speaking, you may mute the microphone
by pressing the “ON/OFF/MUTE” button once momentarily. The
button will flash. The front display will also indicate the mic is
muted. To unmute the mic, press the button once momentarily
again. Note: The AUX Audio Input is unaected by the mic
mute.
12. When the T46 transmitter is not being used, turn the unit OFF
by pressing and holding the “ON/OFF/MUTE” button for three
seconds. The Power On indicator will go o.

6
PPA T46 Personal PA 72-76 MHz Transmitter
Basic Setup
The Basic Setup Menu allows the user to change the most
frequently used settings easily. The User can change the
transmitting channel (or frequency), the master volume level, and
the auxiliary volume level.
1. Turn on the transmitter by pushing and holding the power
button for 3 seconds. The transmitter will start up show the
following screen.
Note: While on the main screen, if the left or right arrow button
is pushed, the following screen will show, indicating that you
need to enter the menu in order to change any settings.
2. To mute the microphone, push and release the power button
on the top of the transmitter. To unmute, push and release
the power button again.
3. To set the transmit channel, push the menu button until you
see the channel set screen, below. Use the arrow buttons to
select one of the 17 channels (see Channel Selection Chart in
Quick Setup, Fig. C).
4. To set the Master Volume Level (this is the microphone +
auxiliary input volume), push the menu button until you see
the master volume screen, below. Use the arrow buttons
to adjust the volume level (1-30).
5. To set the Auxiliary Volume Level (this is the auxiliary input
volume before it is mixed with the microphone), push the
menu button until you see the auxiliary volume screen,
below. Use the arrow buttons to adjust the volume level
(1-30).

7
PPA T46 Personal PA 72-76 MHz Transmitter
Advanced Setup
The Advanced Setup Menu allows the user to turn
compression on/o, change between channel and
frequency display mode, change the transmitter to 8 or
17-channel mode, change the amount of time for display
time-out, set screen brightness, and restore factory default
settings.
1. To access the Advanced Setup Menu, push the Menu
button repeatedly to toggle through all of the basic
settings, until you see the following screen. Push the
right arrow to enter the advanced setup menu.
2. Audio Compression reduces the volume dierence
between loud and quiet sounds. To set the audio
compression ratio, push the menu button until you see
the compression screen, below. Use the left, right arrow
buttons to toggle the compression (1:1 = compression o,
and 2:1 = compression on).
3. To change the display to show either frequency (72.1-
75.9MHz) or channel number (1-17), push the menu
button until you see the frequency display mode screen,
below. Use the arrow buttons to toggle between
“FREQUENCY” or “CH NUMBER” .
4. 8-channel mode restricts the transmitter to just the 8
non-interfering channels (see “Note on Interference” on
page 4 for more details.) To change the transmitter
between 8-channel and 17-channel modes, push
the menu button until you see the channel selection
mode screen, below. Use the arrow buttons to toggle
between “17 CHANNEL MODE” or “8 CHANNEL MODE”.
5. To change the display time-out period (5, 30, or 60 seconds),
push the menu button until you see the time-out screen, below.
Use the arrow buttons to toggle between “5 SECONDS” “30
SECONDS” or “60 SECONDS”.
6. To change the screen brightness (level 1-4), push the menu
button until you see the brightness screen, below. Use the left,
right arrow buttons to toggle between “1” “2” “3” or “4”.
7. To erase all user settings and return to factory defaults, push
the menu button until you see the factory reset screen, “ERASE
ALL SETTINGS RESTORE DEFAULTS?”, below. Push the right
arrow button to choose “YES”. After this you will see the
confirmation screen “FACTORY DEFAULTS RESTORED”. The
transmitter will then return back to the main screen.
8. To lock (or unlock) the settings, you must first be on the Main
Screen.
Push and hold the left and right arrow buttons together. While
holding the buttons, you will see the following dashed-line
display. Keep holding the buttons until all three lines disappear.
The display will then show “PRESS MENU TO LOCK”. Push the
Menu button.
The display will then indicate “LOCKED”. To unlock the settings,
follow these same steps in order.

8
PPA T46 Personal PA 72-76 MHz Transmitter
Dual-Preset Mode
Dual-Preset Mode allows the user to instantly access one of two
independent transmitting modes. Each preset can have it’s own
frequency, master volume, and auxiliary volume settings. After
setup, the user can easily toggle between the two presets.
Note: only one frequency/channel can be transmitted at a time.
1. Turn the transmitter o by holding the power button for 3
seconds. The transmitter must be OFF before performing the
next step.
2. To access Dual-Preset Mode, push-and-hold the Power and
Menu buttons together and keep holding them until you see
the following screen “LOADING...” below.
3. The T46 will power up in Dual-Preset Mode looking similar
to the following screen. “P1” and “P2” indicate the two
presets. The currently selected preset is surrounded by the
box showing “ON AIR”. “ON AIR” means that this preset is
currently transmitting.
4. Use the left or right arrow buttons to move the “ON AIR”
box to the preset you want to adjust. (Note that you are now
transmitting on this preset.)
5. Push the Menu button and note that either “P1” or “P2” shows
up on the top left corner of the screen. This indicates which
Preset you are adjusting.
6. Follow the steps under “Basic Setup” (starting at step 3) to set
up each preset and “Advanced Setup” (starting at step 1) to
change settings that aect both presets.
7. To toggle between the two presets, exit out of the menu and
use the arrow buttons to change between presets.
Note: In Dual-Preset Mode, if settings are locked, the arrow
buttons will allow you to toggle between presets, and the mic
can be muted. All other settings are locked.

9
PPA T46 Personal PA 72-76 MHz Transmitter
Specifications
Dimensions: 4.1” L x 2.8” W x 1.1” D (104 mm x 71 mm x 28 mm)
Weight: 2.6 oz (74 g), no batteries
Color: Black/Silver
Enclosure Material: Shatter-resistant PC/ABS plastic with textured scratch-resistant aluminum faceplate
Battery Type options: Two (2) AA 1.5 V non-rechargeable Alkaline batteries (BAT 001-2), 75 mA nominal current drain, up
to 30 hours battery life
Two (2) AA 1.5 V NiMH rechargeable batteries (BAT 026-2), 75 mA nominal current drain, up to 20
hours battery life per charge, recharges in 14–16 hours, uses CHG 3502 or CHG 3512 Charger
Operating Frequencies: Selectable, 17 channels, 72.1 – 75.9 MHz*. Switchable 8 or 17 Channel Mode. (8-channel mode
setting corresponds with receiver channels)
Stability: ± .005%, frequency synthesized, crystal reference, PLL
Modulation: Wide-band FM, 75 kHz peak, 75 µS pre-emphasis
RF Output: 80 mV/m at 3 m (max. allowed by FCC rules)
Frequency Response: 180 Hz to 13 kHz, ± 3 dB at 1% max. THD
Signal-to-Noise Ratio: 65 dB (typical) transmitted
Transmit Antenna: Integral with microphone cord
Microphone: Electret type, 3.5 mm mono plug, 39” cord, see Compatible Microphones for a list of approved
options
External Display: OLED for status and menu information.
Status: Ch/Freq, Mic Audio Level, Auxiliary Input Audio Level, Battery Status, Mic Mute, Channel
Lock, Dual-Preset mode.
Menu: Ch/Freq display mode select, Volume, Aux Input, Compression,
17 or 8-channel mode, screen time out, screen brightness, restore default settings
External Controls: Momentary push button: push and hold 3 seconds for power On/O, push and release for
microphone mute On/O. left, right and menu buttons for accessing and changing transmitter
settings. Battery type switch (Alkaline or NiMH) located behind the battery compartment door
External Indicators: Power LED - Green, flashes when battery is low
Mic Input: 3.5 mm mono jack with electret mic bias, adjustable gain with
25 dB range
Aux Input: 2.5 mm stereo jack, adjustable gain with 60 dB range
Audio Compression: 1:1 (o) or 2:1 (on) selectable in menu
Compatible Microphones: MIC 044, MIC 090, MIC 100
Compatible Receivers: PPA R37, PPA R37-8, PPA R38
Approvals/Directives: FCC, Industry Canada, RoHS3, WEEE
Warranty: Limited Lifetime Plus Warranty, 90 Days on most accessories.
Note: FCC regulations, section 15.21, requires the user to comply with the rules of transmitter operation. Any changes or modifications made
by the user not expressly approved for compliance may result in the loss of all privileges and authority to operate the equipment.
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

10
PPA T46 Personal PA 72-76 MHz Transmitter
Troubleshooting
Problem Solution
Can’t hear the person speaking/no audio • Verify Transmitter and Receiver are both ON
• Verify Transmitter and Receiver are both on the same channel/frequency.
• Verify Transmitter mic is not muted.
• Verify mic volume and aux. volume levels - try turning them up.
• Verify the microphone with cord is plugged in. The cord acts as the transmitting
antenna.
• Similar to the transmitter, the receiver earphone/headphone cord is the receiving
antenna. Verify the earphone/headphone cord is plugged in all the way on the
receiver.
• If using the aux. input, verify the aux source is playing, and the level indicator (on the
front of the transmitter) is pulsing.
Can’t hear the person speaking above the
room noise
• Adjust the microphone volume in the menu
• Reposition the microphone closer to the mouth
Limited Range • The microphone cord is the transmitting antenna. Make sure it is not coiled up or
obstructed, and that it is a Williams AV approved mic.
• Verify the transmitter distance from the receiver - try bringing them closer.
• Verify there is no interference (see “Note on Interference” on page 4 for more
details.) To check for interference:
Turn o the T46 and use a PPA R38 receiver’s seek function to verify if any other
transmitters are operating in the area. If it locks onto a channel, even if no audio is
heard, that channel is being used by another transmitter. Select a channel with a
dierent frequency from any that is not being used.
• Transmitter batteries low? Receiver batteries low? Try new batteries and if this
works, recycle the old ones.
Feedback (squealing) • Lower the microphone volume in the menu
• Increase the distance between the microphone and the listening speaker
Supported Microphones
TYPE MODEL / MODÈLE
Omnidirectional Condenser MIC 044
Unidirectional condenser MIC 100
Omnidirectional condenser MIC 090