Williams Sound PPA T45NET User manual

PPA T45NET / T45
Personal PA®DSP FM Wideband Transmitter
USER Manual
Transmitter Models PPA T45NET and PPA T45
Optional Receiver Models PPA R38, PPA R37, PPA R35-8, PPA R1600
MAN 176B
PRINTED IN THE U.S.A.

2
Personal PA®DSP FM Wideband Transmitter
PPA T45NET / T45 Personal PA DSP FM Wideband Transmitter
User Manual
Contents
System Connection Overview......................................................................................................................................... 4
Wiring and Connections ................................................................................................................................................5-8
Power Supply Connection for US Applications ................................................................................................................. 5
Audio Source Connections............................................................................................................................................... 5
Multi-Channel Sources ..................................................................................................................................................... 6
Selecting an Audio Source Appropriate for Hearing Impaired Listeners............................................................................. 6
Avoiding Hum in the Audio (as a result of a Ground Loop) ................................................................................................ 7
Installing the ANT 025 Whip Antenna ............................................................................................................................... 7
Connecting the T45 to Other Devices............................................................................................................................... 8
Controls and Features .................................................................................................................................................9-10
Power Button................................................................................................................................................................... 9
OLED Display................................................................................................................................................................... 9
Audio Input Level Indicator ............................................................................................................................................... 9
Input Overload Indicator ................................................................................................................................................... 9
RF Indicator (On-Air)......................................................................................................................................................... 9
Hot Buttons/Menu Controls..............................................................................................................................................9
Headphone Jack............................................................................................................................................................ 10
Main Info Screen and Screen Navigation ........................................................................................................................ 10
Lock/Unlock Settings ..................................................................................................................................................... 10
Quick Setup Instructions................................................................................................................................................ 11
Front Screen Menu Tree (Quick Reference) ..........................................................................................................12-14
Front Screen Menu Tree (Detailed Instructions)...................................................................................................14-24
1. AUDIO SETTINGS .................................................................................................................................................... 14
1a. Audio Presets.................................................................................................................................................... 14
1b. Audio Source.................................................................................................................................................... 16
1c. Audio Input Gain ............................................................................................................................................... 17
1d. Headphone Source........................................................................................................................................... 17
1e. Headphone Volume........................................................................................................................................... 17
2. RF SETTINGS ......................................................................................................................................................18-20
2a. Channel (or Frequency) ..................................................................................................................................... 18
2b. RF Output Power.............................................................................................................................................. 18
2c. RF Time-Out ..................................................................................................................................................... 19
3. PREFERENCES ...................................................................................................................................................19-21
3a. Display Mode .................................................................................................................................................... 19
3b. Channel Mode .................................................................................................................................................. 20

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Personal PA®DSP FM Wideband Transmitter
3c. Screen Time-Out............................................................................................................................................... 20
3d. Transmitter Description ..................................................................................................................................... 20
3e. Restore Defaults................................................................................................................................................ 21
4. ADD-ON MODULE (PPA T45NET only) ..............................................................................................................22-23
4a. Status ............................................................................................................................................................... 22
4b. Security ............................................................................................................................................................ 22
4c. IP Address Mode .............................................................................................................................................. 22
4d. IP Address ........................................................................................................................................................ 23
Network Setup for Hard-wired Ethernet Devices (Laptop or Desktop PC) ......................................................... 24
Network Setup for Wireless Devices (iPad, Android Tablet, or Smart Phone).................................................... 26
Web Control Interface..................................................................................................................................................... 28
Safety Information, Recycling Instructions ................................................................................................................ 31
Wideband FM Receivers (Model Selection is Optional) .....................................................................................32-35
Receiver Model PPA R38 ............................................................................................................................................... 32
Operating the Receiver................................................................................................................................................... 32
Receiver Model PPA R37 ............................................................................................................................................... 33
Operating the Receiver................................................................................................................................................... 33
Receiver Model PPA R35-8 ............................................................................................................................................ 34
Operating the Receiver................................................................................................................................................... 34
Battery Installation (All Receiver Models)......................................................................................................................... 34
Connecting Earphones (All Receiver Models).................................................................................................................. 34
Belt Clip Installation (All Receiver Models) ....................................................................................................................... 35
Suggestions for Receiver Management...................................................................................................................... 36
Receiver Battery Information (All Receiver Models)................................................................................................. 36
Troubleshooting...........................................................................................................................................................37-40
The T45 “RF” (On Air) Indicator is not on ........................................................................................................................ 37
No Audio heard in Phones Jack ..................................................................................................................................... 37
Noise or Distortion in the Audio ...................................................................................................................................... 37
Noise in Audio “grows” when program is silent............................................................................................................... 37
Reception difculties ...................................................................................................................................................... 37
Remote Control is not working over Wi-Fi....................................................................................................................... 39
Remote Control is not working over hard-wired Ethernet network .................................................................................. 40
System Specications ...............................................................................................................................................41-45
PPA T45 Transmitter .................................................................................................................................................41-42
PPA R38 Receiver.......................................................................................................................................................... 43
PPA R35-8 Receiver....................................................................................................................................................... 44
PPA R37 Receiver.......................................................................................................................................................... 45
Lifetime PLUS Limited Warranty................................................................................................................................... 46

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Personal PA®DSP FM Wideband Transmitter
LOUDSPEAKER
LINE-LEVEL
OUTPUT
SOUND SYSTEM/
AMPLIFIER MICROPHONE
PPA T45 TRANSMITTER
FM RECEIVERS
A408
ROUTER
IPAD, TABLET OR PHONE
WITH WI-FI
FM
WI-FI
COMPUTER (HARD-WIRED TO ROUTER)
LINE-LEVEL
INPUT
AUDIO/LISTENING SIDE CONTROL SIDE (PPA T45NET only)
ETHERNET (PPA T45NET only)
ETHERNET
System Connection Overview
The PPA T45 is an FM Wide-Band transmitter operating in the 72-76MHz bandwidth. Compatible Williams Sound receivers
include PPA R38, PPA R37, PPA R35-8 body packs and the PPA R1600 remote speaker.
Developed for hearing assistance in places of public access, the PPA T45 is designed for those who need help overcoming
background noise, reverberation, or distance from the sound source. It includes a complete audio processor optimized for the
needs of hearing impaired persons and is easily integrated with your existing sound system. The PPA T45 can also be used with a
microphone as a stand-alone system.
Your PPA T45 transmitter operates just like an FM radio station. The transmitter takes audio directly from a microphone or sound
system. This audio is then broadcast over an FM radio signal. FM radios can be worn by listeners or AC powered amplied
speaker with built in receiver can be utilized as needed. The broadcast can be received up to 1000 ft from the transmitter *. This
allows listeners to sit anywhere in the area and listen to the broadcast at the level they need without disturbing others around
them.
Two models are available - one with Ethernet control (PPA T45NET) and one without Ethernet control (PPA T45). Ethernet control
allows the transmitter settings to be changed over a network with hard-wired or wireless devices (Figure 1).
*Range is dependent on the environment.
Figure 1: Typical System Example

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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
A401
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
WITH LINK AND
ACTIVITY LED’S
(PPA T45NET Only)
POWER SUPPLY
JACK
Power Supply Connection
Connect the TFP 048 power supplly to the Power Supply Jack located on the rear of the PPA T45 transmitter (Figure 2).
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 jack
4. Balanced/Unbalanced Line on a 3-pin (XLR) connector.
5. Balanced/Unbalanced Line on 1/4 inch jack.
6. Digital Audio (AES/EBU) on a 3-pin (XLR) connector.
7. Digital Audio (S/PDIF) on an RCA jack.
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 congure the audio source in the menu
of the T45 before plugging that source in.
Figure 2: PPA T45NET Rear View

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Personal PA®DSP FM Wideband Transmitter
BALANCED LINE USING 1/4" CONNECTOR
IN PHASE
A106
UNBALANCED LINE USING 1/4" CONNECTOR
A107
4.7 K
4.7 K
SOURCE A
SOURCE B
CONNECTING TO A MULTI-CHANNEL OR STEREO SOURCE
A109
BALANCED LINE USING 3–PIN CONNECTOR
IN PHASE
1 2
3
3 PIN CONNECTOR
A108
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
Figure 3: Audio Source Connectors
Multi–Channel Sources
By constructing a simple resistive mixer, stereo (or 3 channel) sources can be connected to the T45. Additional channels can be
accommodated by adding a resistor for each source. Necessary resistors can be obtained from Williams Sound (Part Number
RFC 472) or from any local electronics parts supplier. See Figure 3.
Selecting an Audio source Appropriate for Hearing Impaired Listeners
If the T45 is going to be used specically for the accommodation of hearing impaired listeners, we recommend following these
general guidelines:
The PPA T45 transmits audio with excellent delity. 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 effective DSP audio
processor. If compression is desired in the audio, refer to page 17-18 for features and controls. 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.

7
Personal PA®DSP FM Wideband Transmitter
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 effectiveness of this method for your
installation usually requires some experimentation. Necessary capacitors can be obtained from Williams Sound or from any
electronic parts supplier. See Figure 4.
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
Figure 4: Connecting to a Balance/Unbalanced Line
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.williamssound.com and view the Antenna Application Guide under
“Products - Accessories - Antennas”.
Installing the ANT 025 Whip Antenna
Gently thread the ANT 025 onto the stud recessed in the hole on the top of the transmitter. See Figure 5.
ANT 025 ANTENNA
(INCLUDED)
REMOTE ANTENNA
COAXIAL JACK
FOR
75 Ohm ANTENNAS
(SEE ANTENNA APPLICATION GUIDE)
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
Figure 5: Installing the ANT 025 Antenna (rear view)

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Personal PA®DSP FM Wideband Transmitter
Figure 6: T45 Typical Connections
A407
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
ANALOG AUDIO
LINE OUT (RCA)
ANALOG
LINE/MIC INPUT
(XLR OR 1/4”)
BALANCED,
UNBALANCED,
OR PHANTOM.
DIGITAL
LINE
INPUT
(RCA)
REMOTE
ANTENNA
CONNECTION
(RG-6 QS,F-CONN)
PPA T45
RECORDING DEVICE
AUDIO LINE IN (RCA)
ROUTER
ANALOG LINE
OUTPUT
(1/4” or XLR)
DIGITAL
LINE
INPUT
(XLR)
AES or EBU.
PPA T45NET ONLY
COMPUTER, DVD, CD OR MP3 PLAYER WITH DIGITAL OUTPUT
DIGITAL LINE OUT (RCA)
DIGITAL MIXER
REMOTE
ANTENNA
STANDARD CAT5 ETHERNET CABLE (RJ-45)
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
STANDARD CAT5 ETHERNET CABLE (RJ-45)
LAPTOP (OR DESKTOP)
COMPUTER
Connecting the T45 to other Devices
The Analog LINE/MIC Input jack can be used with standard pro audio electronics such as Condenser Microphones (15-45v) or
an analog line output from a mixer. The combination jack accepts either XLR or 1/4”. This source must be congured in the
menu before plugging the source into the jack.
The RCA Audio Line Output jack can be used for monitoring, recording, or routing processed audio to another sound system.
The XLR Digital Line Input can be used with the output of a digital mixer or digital audio source.
The RCA S/PDIF Digital Line Input 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 useable 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 Sound Antenna Guide for a full range of antenna and mounting options. It is
recommended to use RG-6 Quad-Shielded coaxial cable for best sheilding against RF interference.
The Ethernet Jack can be used to connect the T45 to either (1) a network or (2) directly to a single computer. Both options use
a standard ethernet cable. A crossover cable is not required to connect the T45 directly to a computer, because an internal MUX
senses the device that is connected and crosses the pins automatically.

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Personal PA®DSP FM Wideband Transmitter
Power Button
Push-button switch turns the transmitter on or off. The desktop power supply provides power to the unit at all times. (Figure 7)
OLED Display
This shows current operation settings and is also used with the menu control buttons for conguring the T45. Each time the
power of the unit is turned on, the OLED Display shows a “Williams Sound” start-up screen (Figure 8). 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, go back and double-check the connections. Make sure the power supply is properly
installed, and the power button is in the “on” position. (Figure 7)
(NOTE: If the transmitter is not fully functional, 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 generally lights and +9dB only lights
occasionally. Use the Audio Level settings in the menu to set the audio levels. (Figure 7)
Input Overload Indicator
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. (Figure 7)
RF Indicator (On Air)
Indicates when radio frequency is transmitting. (Figure 7)
Hot Buttons / Menu Controls
• While the transmitter is displaying the Main Info Screen (Figure 8), 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 or increases a setting (i.e. if adjusting Headphone Volume, increases the
volume).
Figure 7: PPA T45 Front View
Controls & Features
POWER
BUTTON
(BACKLIT WHEN
UNIT IS ON)
RF
INDICATOR
(ON-AIR)
AUDIO
INPUT
LEVEL
INDICATORS
BACK
BUTTON
DOWN/
DECREASE
BUTTON
FORWARD
BUTTON
UP/
INCREASE
BUTTON
MAIN
MENU
BUTTON
OLED
DISPLAY
HEADPHONE
JACK
A405
INPUT
OVERLOAD
INDICATOR

10
Personal PA®DSP FM Wideband Transmitter
FREQUENCY (OR CH)
CHANNEL (OR FREQ)
DEVICE DESCRIPTION
(BLANK IF NOT ENTERED)
RF
POWER
LEVEL
NETWORK
LINK
(CONNECTED)
SETTINGS
LOCKED
ADD-ON MODULE INFO
(TWO LINES)
AUDIO SOURCE JACK SELECTED
AUDIO PRESET SELECTED
AUDIO INPUT GAIN LEVEL SELECTED
A403
• The Down “v” button navigates downward in the menu or decreases a setting (i.e. if adjusting Headphone Volume, decreases
the volume).
• 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 for
the Transmitter (see the menu tree) this button advances to the next character. (Figure 7)
Headphone Jack
A headset plugged into the headphone jack allows monitoring either the audio input before it is processed and transmitted by
the T45 (Analog Sources only) or the T45 audio output after it gets processed. By default, the headphone jack audio is set for
“TRANSMITTED AUDIO”. The Menu also allows the listener to select “INPUT AUDIO”. When monitoring a digital input, the only
option available will be “TRANSMITTED AUDIO”, since the digital source cannot be listened to directly, it must be converted to
analog audio rst (Figure 7).
MENU TREE EXISTS
TO THE LEFT
SELECTION BOX
MENU TREE EXISTS
TO THE RIGHT
A403
MENU / SUBMENU TITLE
MENU TREE EXISTS ABOVE / BELOW
Main Info Screen and Screen Navigation
The Main Info Screen will show the following information: Operating Frequency/Channel, Device Description (if entered, other-
wise blank), RF Power Level, Network Link (with optional ethernet module), Audio Source, Audio Application Preset, Audio Input
Gain Setting, and Locked (if the menu has been locked, otherwise blank). The menu lock indicates that the menu screens are
locked, which prevents any functions from being accidentally changed. To lock or unlock the menu screens, press and hold the
Left “<” and Right “>” buttons together on the front of the T45 for three seconds. (Figure 8)
Lock/Unlock Settings
To lock or unlock the menu screens, press and hold the Left “<” and Right “>” buttons together on the front of the T45 for three
seconds.
Figure 8: Main Info Screen
While navigating through the menu, carat symbols (<,>,^,v) will show up, indicating that parts of the menu exist “off-screen” to the
left, right, above or below. (Figure 9)
Figure 9: Screen Navigation