Williams Sound PPA T45 User manual

PPA T45, PPA T45 NET, PPA T45 NET D
Personal PA®DSP FM Wideband Transmitters
USER Manual
Optional Receiver Models PPA R38, PPA R37, PPA R37-8
MAN 176G

2
Personal PA®DSP FM Wideband Transmitter
Table of Contents
Safety Warnings and Instructions 4
System Connection Overview 5
Wiring and Connections 6
Power Supply Connection 6
Ethernet and Dante RJ-45 Connection 6
Audio Source Connections 6
Multi–Channel Sources 7
Selecting an Audio source Appropriate for Hearing Impaired Listeners 7
Avoiding Hum in the Audio (as a Result of a Ground Loop) 7
Installing the ANT 025 Whip Antenna 8
Connecting the T45 to other Devices 8
Controls and Features 10
Quick Setup Instructions 12
Front Screen Menu Tree - Diagram 13
Front Screen Menu Tree - Details 16
1. AUDIO SETTINGS 16
1a. Audio Source 16
1b. Audio Input Gain 16
1c. Audio Presets 16
1d. Headphone Source 17
1e. Headphone Volume 17
2. RF SETTINGS 18
2a. Channel (or Frequency) 18
2b. RF Output Power 18
2c. RF Time-Out 18
3. PREFERENCES 19
3a. Display Mode 19
3b. Channel Mode 19
3c. Screen Time-Out 19
3d. User-Entered Transmitter Description 19
3e. Restore Defaults 19
4. ADD-ON MODULES (PPA T45 NET and PPA T45 NET D) 19
4a. Network Status 19
4b. Network Settings 20
4c. Ethernet Admin 20
Network Setup for Hard-wired devices (Laptop or Desktop PCs) 20
Network Setup for Wireless Devices (iPad, Android Tablet, or smart phone) 22
Web Control Interface 23
Receiver Safety Information 28
Recycling Instructions 29
Wideband FM Receivers (model selection optional) 29
Receiver Model PPA R38 29
Receiver Model PPA R37 30
Operating the PPA R37 Receiver 30
Receiver Model PPA R37-8 31
LED Flash Codes 31

3
Personal PA®DSP FM Wideband Transmitter
Operating the PPA R37-8 Receiver 32
Connecting Earphones/Headphones 32
Battery Installation (All Receiver Models) 32
Belt Clip Installation (All Receiver Models) 32
Earpad Cleaning for Earphones and Headphones 32
Suggestions for Receiver Management 32
Receiver Battery Information (all receiver models) 33
Battery Charger Information 33
Troubleshooting 33
Audio problems 33
Reception diculties 34
Remote Control is not working over the hardwired Ethernet network 35
Remote Control is not working over Wi-Fi 36
Specifications PPA T45, PPA T45 NET, PPA T45 NET D Transmitters 37
Specifications PPA R38 Receiver 39
Specifications PPA R37-8 Receiver 40
Specifications PPA R37 Receiver 41
Limited Lifetime Warranty 42

4
Personal PA®DSP FM Wideband Transmitter
Safety Warnings and Instructions
WARNING! TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION! TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL.
POWER CORD NOTICE FOR INTERNATIONAL OPERATION - Please call Williams AV Customer Service at 800.328.6190 to order the
appropriate power cord for the country of use.
Important Safety Instructions:
1. Read these instructions
2. Keep these instructions
3. Heed all warnings
4. Follow all instructions
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce
heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than
the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they
exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Unplug this apparatus during lightning storms or when unused for long periods of time.
13. Refer all servicing to qualified service personnel.
14. The apparatus shall not be exposed to liquids.
15. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufacturer. An appliance
and cart combination should be moved with care. Quick stops, excessive force and uneven surfaces may cause the appliance and cart
combination to overturn.
16. Wall or ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer.
17. Power Sources - The appliance should be connected to a power supply only of the type described in the operating instructions or
as marked on the appliance.
18. Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through the
openings.
19. Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions. All other
servicing should be referred to qualified service personnel.
Precautions:
1. Power – WARNING, BEFORE TURNING ON THE POWER FOR THE FIRST TIME, READ THE FOLLOWING SECTION
CAREFULLY. The unit is designed for use only with the line cord of the region in which it will be operated.
2. Voltage Label (Rear Panel) – A label located at the rear panel power connection indicates the DC power input for the unit. The label
will read DC 24V. Note: use the Williams AV TFP 048 power supply for this unit.
3. Do Not Plug in the input, output, Ethernet, or Dante connections while the power switch is switched to the “ON” position.
4. Do Not Touch the PPA T45 NET/D with wet hands. Do not handle the PPA T45 NET/D or power cord when your hands are wet or damp.
If water or any other liquid enters the PPA T45 NET/D cabinet, take the PPA T45 NET/D to qualified service personnel for inspection.
5. Place the PPA T45 NET/D in a well, ventilated location. Take special care to provide plenty of ventilation on all sides of the PPA T45
NET/D especially when it is placed in an audio rack. If ventilation is blocked, the PPA T45 NET/D may over heat and malfunction. Do
not expose the PPA T45 NET/D to direct sun light or heating units as the PPA T45 NET/D internal components temperature may rise
and shorten the life of the components. Avoid damp and dusty places.
6. Care – From time to time you should wipe o the front and side panels and the cabinet with a soft cloth. Do not use rough material,
thinners, alcohol or other chemical solvents or cloths since this may damage the finish or remove the panel graphics.

5
Personal PA®DSP FM Wideband Transmitter
System Connection Overview
The PPA T45 is an FM Wide-Band transmitter operating in the 72-76 MHz bandwidth. Three models are available - a standalone
FM Transmitter (PPA T45), one with Ethernet control (PPA T45 NET) and one with Ethernet control and a Dante™Input (PPA T45 NET
D). Ethernet control allows the transmitter settings to be changed over a network with hard-wired or wireless devices. The Dante™
Input allows audio from networked Dante™devices to be played through the transmitter.
Compatible Williams AV receivers include the PPA R38, PPA R37 and PPA R37-8 body pack receivers.
Developed for hearing assistance in places of public access, the PPA T45 models are designed for those who need help
overcoming background noise, reverberation, or distance from the sound source. They include a complete audio processor
optimized for the needs of hearing impaired people and are easily integrated with an existing sound system, or used with a
microphone as a stand-alone system.
The PPA T45 transmitter models operate as a small FM radio station. The transmitter takes audio directly from one of it's inputs
(audio sources like a microphone, sound system, mixer board, or Dante™device) and broadcasts the audio on an FM channel. FM
radios can be worn by listeners to hear the audio. The broadcast can be received up to 1000 ft* from the transmitter. Listeners can
sit anywhere in the broadcast area and listen to the audio at the volume level they need without disturbing others.
*Range is dependent on the environment.
LOUDSPEAKER
LINE-LEVEL
OUTPUT
SOUND SYSTEM/
AMPLIFIER
MICROPHONE
PPA T45 TRANSMITTER
FM RECEIVERS
A605
LAN NETWORK ROUTER
IPAD, TABLET OR PHONE
WITH WI-FI
(for control, no audio)
FM
WI-FI
DESKTOP (OR LAPTOP)
COMPUTER
LINE-LEVEL
INPUT
ETHERNET (PPA T45 NET only)
ETHERNET
Dante™ Audio (PPA T45 NET D only)
DANTE™ AUDIO SOURCE,
MIXING BOARD,
etc.
DANTE NETWORK*
Dante™ Audio
*If Dante™ Audio is to be physically isolated from the LAN,
a separate NETWORK ROUTER and/or SWITCH may be required.
The LAN router may also be configured to keep Dante™ Audio
separated from the LAN with port management or other techniques,
but as Dante traffic increases, LAN performance may decrease.

6
Personal PA®DSP FM Wideband Transmitter
Wiring and Connections
24VDC 0.75A
williamssound.com
Line / Mic In
Analog
Audio
Digital
Audio
Line Out AES / EBU In S/PDIF In RF 75 Ω Ant Ethernet
bal
—
unbal
—
phantom
T45 Rear
A601
ANALOG
LINE/MIC INPUT
ACCEPTS BALANCED
OR UNBALANCED
1/4” PLUG or XLR
RCA LINE OUTPUT
FOR MONITORING
OR RECORDING
DIGITAL INPUT
ACCEPTS AES
OR EBU DIGITAL
AUDIO XLR PLUG
RCA DIGITAL AUDIO
INPUT FOR
COAXIAL/DIGITAL
AUDIO
RF OUTPUT
FOR REMOTE
ANTENNA
CONNECTION
ETHERNET JACK
(PPA T45NET AND
PPA T45 NET D)
POWER SUPPLY
JACK
DANTE JACK
(PPA T45NET D
ONLY)
The PPA T45 NET D has an Ethernet jack and a Dante jack.
The PPA T45 NET has an Ethernet jack but no Dante jack.
The PPA T45 does not have Ethernet or Dante jacks.
Power Supply Connection
Connect the TFP 048 power supply to the Power Supply Jack located on the rear of the PPA T45 transmitter.
Ethernet and Dante RJ-45 Connection
If connecting to a network or directly to a PC, a shielded Cat 5e cable must be used. In some cases, (like older PCs) a crossover
cable may need to be used. Note that "shielded" means there is a foil layer between the twisted-pair conductors and the
insulation jacket.
Audio Source Connections
The T45 transmitter will accept the following audio sources:
1. Balanced Microphone on a 3-pin (XLR) connector without phantom power.
2. Balanced Microphone with 12 volt phantom power (DIN 45596) on a 3-pin (XLR) connector.
3. Balanced/Unbalanced microphone with or without phantom power on 1/4 inch (TRS) jack
4. Balanced/Unbalanced Line on a 3-pin (XLR) connector.
5. Balanced/Unbalanced Line on 1/4 inch (TRS) jack.
6. Digital Audio (AES/EBU) on a 3-pin (XLR) connector.
7. Digital Audio (S/PDIF) on an RCA jack.
8. Dante on an RJ-45 jack (PPA T45 NET D only).
WARNING:
The T45 is not designed to accept 70 volt speaker signals! This may result in damage to your system. The sound source
should come directly from the system mixer or digital source as a low-level or unprocessed signal.
IMPORTANT: When a suitable audio source has been determined, you MUST configure the audio source in the menu of the
T45 before plugging that source in.
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.

7
Personal PA®DSP FM Wideband Transmitter
IN PHASE
FROM MICROPHONE
1 2
3
3 PIN CONNECTOR
LOW IMPEDANCE MICROPHONE
A104
UNBALANCED LINE USING 3–PIN CONNECTOR
1 2
3
3 PIN CONNECTOR
A105
BALANCED LINE USING 1/4" CONNECTOR
IN PHASE
A106
UNBALANCED LINE USING 1/4" CONNECTOR
A107
BALANCED LINE USING 3–PIN CONNECTOR
IN PHASE
1 2
3
3 PIN CONNECTOR
A108
4.7 K
4.7 K
SOURCE A
SOURCE B
CONNECTING TO A MULTI-CHANNEL OR STEREO SOURCE
A109
Multi–Channel Sources
By constructing a simple resistive mixer, stereo (or 3 channel) sources can be connected to the T45 analog input. Additional
channels can be accommodated by adding a resistor for each source. Necessary resistors can be obtained from Williams AV (Part
Number RFC 472) or from any local electronics parts supplier.
Note: The Dante audio input on the PPA T45 NET D will automatically mix the left and right channels.
Selecting an Audio source Appropriate for Hearing Impaired Listeners
If the T45 is going to be used specifically for the accommodation of hearing impaired listeners, we recommend following these
general guidelines:
The PPA T45 transmits audio with excellent fidelity. Therefore, the audio source signal should be of the highest audio quality and
not subject to a compressor, limiter, reverberation, or other signal processing equipment. The T45 has a very eective DSP audio
processor. If compression is desired in the audio, refer to the “Compression” section under “Audio Settings - 1c. Audio Presets”
for available settings. Excessive compression is not helpful to the hearing impaired and can contribute to excessive noise in the
receiver outputs.
The T45 audio source signal is usually connected to a mixer’s “line output” signal which is behind the mixer’s parametric equalizers
but ahead of any equalization used for house loudspeakers.
If audio delay is available for use in large auditoriums, it’s usually best to use it. Because radio signals travel faster than sound,
delaying the transmitted audio so that an average listener (in the middle of the listening area) hears the transmitted audio a few
milliseconds after audio from the main sound reinforcement system speaker is helpful. This will also help audience members who
lip read.
Avoiding Hum in the Audio (as a Result of a Ground Loop)
A hum created by a ground loop can often be eliminated by connecting a capacitor in series with the audio line shield to the
transmitter’s ground. This method also maintains good RF shielding. Determining the eectiveness of this method for your
installation usually requires some experimentation. Necessary capacitors can be obtained from Williams AV or from any electronic
parts supplier.

8
Personal PA®DSP FM Wideband Transmitter
IN PHASE
1 2
3
3-PIN
CONNECTOR
BREAKING A GROUND LOOP WHEN
CONNECTING TO A UNBALANCED LINE
BREAKING A GROUND LOOP WHEN
CONNECTING TO A BALANCED LINE
.01 uF CERAMIC DISC
CAPACITOR .01 uF CERAMIC
DISC CAPACITOR
A110
Installing the ANT 025 Whip Antenna
Gently thread the ANT 025 onto the stud recessed in the hole on the top of the transmitter.
ANT 025 ANTENNA
(INCLUDED)
REMOTE ANTENNA JACK
FOR 75 Ohm ANTENNAS
A410
24VDC0.75A
williamssound.com
Line / Mic In
Analog
Audio
Digital
Audio
Line Out AES / EBU In S/PDIF In RF 75 Ω Ant Ethernet
bal
—
unbal
—
phantom
CHASSIS STUD MOUNT
NOTE: If the T45 is going to be rack mounted, you will not be able to install the ANT 025 whip antenna. For rack mounting,
consider installing a remote antenna like the ANT 005 or ANT 024 - these antennas require using the Remote Antenna
Coaxial Jack (above) and a long length of terminated coaxial cable. Another option is to mount the antenna on the rack
itself - consider the ANT 029 which includes a 1RU bracket and a 3ft terminated coaxial cable. For a full list of antenna
options, please go to our website www.williamsav.com and view the Antenna Application Guide under “Products -
Accessories - Antennas”.
Connecting the T45 to other Devices
The Analog LINE/MIC Input (XLR / 1/4") jack can be used with standard pro audio electronics such as standard pro audio line
level, condenser microphones up to 15v or an analog line output from a mixer. The combination jack accepts either XLR or
1/4” (TRS). This source must be configured in the menu before plugging the source into the jack.
The Analog Audio Line Output (RCA) jack can be used for monitoring, recording, or routing processed audio to another
sound system.

9
Personal PA®DSP FM Wideband Transmitter
The AES/EBU Digital Line Input (XLR) can be used with the output of a digital mixer or digital audio source. The processors
inside the T45 convert the digital bitstream into usable audio.
The S/PDIF Digital Line Input (RCA) jack can be used with a device that has an RCA Digital Audio Out (also referred to as “Coaxial
Digital Audio” from consumer electronic devices. The processors inside the T45 convert the digital bitstream into usable audio.
The Remote Antenna Connection can be used to connect a remote antenna to the T45 when the whip antenna won’t be used (as
in the case of rack-mounting). See the Williams AV Antenna Guide for a full range of antenna and mounting options.
The Ethernet and Dante RJ-45 jacks can be used to connect the T45 NET to either (1) a local network or (2) directly to a single
computer or Dante device. In all cases a shielded Cat 5e Ethernet cable must be used. When connecting a device directly, a
crossover cable may need to be used depending on the device being connected. Some older PC's require a crossover cable.
24VDC 0.75A
williamssound.com
Line / Mic In
Analog
Audio
Digital
Audio
Line Out AES / EBU In S/PDIF In RF 75 Ω Ant Ethernet
bal
—
unbal
—
phantom
A608
ANALOG AUDIO
LINE OUT (RCA)
ANALOG
LINE/MIC INPUT
(XLR OR 1/4”)
BALANCED,
UNBALANCED,
OR PHANTOM.
DIGITAL
LINE
INPUT
(RCA)
REMOTE
ANTENNA
CONNECTION
(F-CONN, COAXIAL)
PPA T45
ANALOG MIXER OR AUDIO SYSTEM
AUDIO LINE IN (RCA)
ETHERNET NETWORK ROUTER
ANALOG LINE
OUTPUT
(1/4” or XLR)
DIGITAL
LINE
INPUT
(XLR)
AES
or EBU.
PPA T45 NET AND
PPA T45 NET D
DEVICE OR MIXER WITH S/PDIF OUTPUT
DIGITAL LINE OUT (RCA)
DIGITAL MIXER
REMOTE
ANTENNA
SHEILDED CAT5e CABLE
MICROPHONE
(CONDENSER
OR OTHER)
ANALOG MIXER
DIGITAL LINE
OUTPUT
(XLR)
AES or EBU.
COMPUTER
OR
ETHERNET
SWITCH
INTERNET
MODEM
STANDARD
CAT5
ETHERNET
CABLES
(RJ-45)
TO AC
POWER
SOURCE
SHEILDED CAT5e CABLE
LAPTOP (OR DESKTOP)
COMPUTER
SUPPLIED
ANTENNA
(CHASSIS
MOUNT)
DANTE SOURCE DEVICE
SHEILDED CAT5e CABLE
PPA T45 NET D ONLY
SHEILDED CAT5e CABLE
REMOTE ANTENNA CONNECTION OR CHASSIS MOUNT ANTENNA
CAN BE USED, BUT NOT BOTH AT THE SAME TIME
DANTE NETWORK (SWITCH) DANTE AUDIO AND NETWORK CONTROL CAN BE COMBINED
ON THE SAME NETWORK IF DESIRED (NOT SHOWN).

10
Personal PA®DSP FM Wideband Transmitter
Controls and Features
PPA T45 Front View
POWER BUTTON
(BACKLIT WHEN
UNIT IS ON)
RF
INDICATOR
(ON-AIR)
AUDIO INPUT
LEVEL
INDICATORS
MENU BACK BUTTON AND
CHANNEL(-) HOT BUTTON
MENU / PAGE UP BUTTON, AUDIO INPUT
GAIN ADJUST(+) HOT BUTTON
MAIN MENU
BUTTON
OLED DISPLAY
HEADPHONE
JACK
A405
MENU / PAGE DOWN BUTTON AND AUDIO INPUT
GAIN ADJUST(-) HOT BUTTON
MENU FORWARD BUTTON,
CHANNEL(+) HOT BUTTON, SAVE SETTINGS
Power Button
Latching push-button switch turns the transmitter on or o. The desktop power supply provides power to the unit at all times.
OLED Display
This shows current operation settings and is also used with the menu control buttons for configuring the T45. Each time the power
of the unit is turned on, the OLED Display shows a “Williams AV” start-up screen. After seven seconds, the “RF” (On-Air) LED will
illuminate and the default Main Info Screen screen will be displayed. The T45 is now fully operational. If the “RF” (On-Air) indicator
does not illuminate, check the RF settings to make sure RF is not set to “RF OFF”. Make sure the power supply is properly
installed, and the power button is in the “on” position.
(NOTE: If the transmitter is not fully functional, and the internal tests fail, the transmitter will attempt to auto-recover by rebooting itself.)
Audio Input Level Indicator
The bar graph indicator shows audio level in 3dB steps at the input of the audio level processing circuit. The indicator is peak
responding and is calibrated so that optimum level is reached when the 0dB LED lights up often and the +9dB only lights
occasionally. Use the Audio Level settings in the menu to set the audio levels.
Input Overload Indication
The OLED Display shows an overload warning screen each time the audio signal exceeds the capacity of the input circuit. Either (1) the
source of the audio coming in to the T45 needs to be adjusted to correct this or (2) the Audio Input Gain needs to be adjusted.
RF Indicator (On Air)
Indicates when radio frequency is transmitting.
Hot Buttons / Menu Controls
• While the transmitter is displaying the Main Info Screen, the Up “^” and Down “v” buttons adjust the Audio Input Gain; while
the Left “<” and Right “>” buttons change the Channel.This immediate adjustment capability is referred to as “Hot Buttons”.
• The Menu button is a Enter/Exit Menu function only. It does not “select” anything within the menu. It allows the user to
quickly return to the Main Info Screen from any place in the menu.
• While the transmitter is displaying the Menu on the screen:
• The Up “^” button navigates upward in the menu, changes a setting, or acts as a page up on info screens.
• The Down “v” button navigates downward in the menu, changes a setting, or acts as a page down on info screens.
• The Left “<” button backs out of the menu one step at a time (see the menu tree).
• The Right “>” button navigates forward in the menu (see the menu tree) or selects a setting. When entering a Description, IP
Address, or Subnet Mask for the Transmitter (see the menu tree) this button advances to the next character.