User Manual
PT-AA140
User Manual
Power Amplifier 40W (70V/100V), 3 Line & 1 MIC Inputs
Model PT-AA-140
Designed in Germany
© 2017 PureLink GmbH All rights reserved. VersionV1.0
User Manual
PT-AA140
Preface
Read this user manual carefully before using this product. Pictures shown in this
manual are for reference only. Different model layouts and specifications are subject
to the physical product.
This manual is for operation instructions only, not for any maintenance usage.
In the constant effort to improve our product, we reserve the right to make changes in
functions or parameters without prior notice or obligation.
Trademarks
Product model and logo are trademarks. Any other trademarks mentioned in this
manual are acknowledged as the properties of the trademark owner. No part of this
publication may be copied or reproduced without the prior written consent.
FCC Statement
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. It has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference in
a commercial installation.
Operation of this equipment in a residential area is likely to cause interference, in
which case the user at their own expense will be required to take whatever measures
may be necessary to correct the interference.
Any changes or modifications not expressly approved by the manufacture would void
the user’s authority to operate the equipment.
User Manual
PT-AA140
REACH | 1907/2006/EU
ROHS | 2011/65/EU
PureLink hereby declares that this product PureTools PT-AA140 complies with
Directives 1907/2006/EU und 2011/65/EU.
EMC / LVD (Electro Magnetic Compatibility / Low Voltage Directive)
PureLink GmbH hereby declares that this product PureTools PT-AA140 complies
with Directives 2014/30/EU and 2014/35/EU. The full text of the EU Declaration
of Conformity is available at the following Internet address:
http://www.purelink.de/ce/4251364706640_CE.pdf
User Manual
PT-AA140
SAFETY PRECAUTIONS
To insure the best from the product, please read all instructions carefully before
using the device. Save this manual for further reference.
Unpack the equipment carefully and save the original box and packing
material for possible future shipment
Follow basic safety precautions to reduce the risk of fire, electrical shock and
injury to persons.
Do not dismantle the housing or modify the module. It may result in electrical
shock or burn.
Using supplies or parts not meeting the products’ specifications may cause
damage, deterioration or malfunction.
Refer all servicing to qualified service personnel.
To prevent fire or shock hazard, do not expose the unit to rain, moisture or
install this product near water.
Do not put any heavy items on the extension cable in case of extrusion.
Do not remove the housing of the device as opening or removing housing may
expose you to dangerous voltage or other hazards.
Install the device in a place with fine ventilation to avoid damage caused by
overheat.
Keep the module away from liquids.
Spillage into the housing may result in fire, electrical shock, or equipment
damage. If an object or liquid falls or spills on to the housing, unplug the
module immediately.
Do not twist or pull by force ends of the optical cable. It can cause
malfunction.
Do not use liquid or aerosol cleaners to clean this unit. Always unplug the
power to the device before cleaning.
Unplug the power cord when left unused for a long period of time.
Information on disposal for scrapped devices: do not burn or mix with general
household waste, please treat them as normal electrical wastes.
User Manual
PT-AA140
Contents
1. Introduction .................................................................................................................................. 1
1.1 Introduction to PT-AA140 ............................................................................................... 1
1.2 Feature ................................................................................................................................ 1
1.3 Package Content ............................................................................................................... 2
2. Panel Description ........................................................................................................................ 3
2.1 Front Panel ......................................................................................................................... 3
2.2 Rear Panel........................................................................................................................... 4
3. System Connection ..................................................................................................................... 6
3.1 Usage Precaution .............................................................................................................. 6
3.2 System Diagram ................................................................................................................ 6
3.3 Audio Signal Connection ................................................................................................ 7
3.3.1 Audio Output ......................................................................................................... 7
3.3.2 Audio Input ............................................................................................................. 8
3.4 System Applications ........................................................................................................ 9
4. System Operation ..................................................................................................................... 10
4.1 Button Control ................................................................................................................ 10
4.1.1 Audio switching.................................................................................................. 10
4.1.2 Volume/EQ controlling..................................................................................... 11
4.2 IR Remote Control ......................................................................................................... 12
4.3 RS232 Control ................................................................................................................ 13
4.3.1 Connection with Computer ............................................................................. 13
4.3.2 RS232 Control Software .................................................................................. 13
4.3.3 Running Environment ....................................................................................... 14
4.3.4 Function Setting ................................................................................................. 14
4.3.5 RS232 Command ............................................................................................... 15
5. Specification .............................................................................................................................. 18
6. Panel Drawing ........................................................................................................................... 19
7. Troubleshooting and Maintenance ...................................................................................... 21
8. After-Sales Service ................................................................................................................... 22
User Manual
PT-AA140
1. Introduction
1.1 Introduction to PT-AA140
The PT-AA140 is a 40 Watt power amplifier (Class-D) with output alternatively at 70V
or 100V. It has 2 stereo inputs (1x3.5mm jack for line in, 2xRCA for L&R), 1 digital
input & 1 balanced MIC. It is integrated with powerful functions, including ducking
function, EQ control, MIC mixer etc, and MIC input supports 3 levels with condenser
MIC, dynamic MIC & line audio input.
As for power amplifier we have normally voltages at 70V and 100V for different
countries, but PT-AA140 is designed to integrate with both voltages to meet different
requirements.
1.2 Feature
Mono audio output at 40Watt.
Switchable between 70V and 100V.
Ducking function.
16 ID codes for controlling between different PT-AA140 amplifiers.
3-level MIC input, supports condenser microphone, dynamic microphone and
wireless microphone.
MIC port can support balance/unbalance signal, suppress the external noise
effectively.
Two stereo audio inputs and one digital audio input, switchable by button, IR
remote & RS232.
Volume/Bass/Treble controllable by buttons, IR remote & RS232.
Fast switching speed for good performance.
Convection cooler, fan is not needed.
LED indicator, for power and working status.
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1.3 Package Content
1 x PT-AA140
2 x Mounting Ears with 4 Screws
4 x Plastic Cushions
2 x Pluggable Terminal Blocks
1 x Power Adapter (DC 24V 2.71A)
1 x User Manual
Note: Confirm if the product and the accessories are all included, if not, please contact
with your dealers.
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No.
Name
Function
①
Audio Input
Selection
To select the input audio source, after choosing the audio
source, the corresponding LED indicator will be on. No.1 is
for dual mono audio input (2 RCA connectors for L&R),
No.2 is for stereo audio input (3.5mm mini jack), and No.3
is for digital fiber audio input.
②
Audio
Control
Adjust the volume of the MIC, Line, or the level of Bass
and Treble with this button
③
Volume
Adjustment
To turn up/down or mute the corresponding audio.
▽: Turn down the volume
△: Turn up the volume
MUTE: Mute the output
1
2
3
2. Panel Description
2.1 Front Panel
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No.
Name
Function
①
Power
Indicator
Turns red when power on.
②
Microphone
Input
3-pole captive screw connector for microphone input, the
dial switch in right side is to select the micro input kind,
including 48V (for condenser microphone), MIC (for
dynamic microphone) and LINE (for line audio).
③
Audio Inputs
3.5mm mini jack for stereo audio input, it can be connected
with audio source device such as DVD player.
④
ID Code
16 codes range from 0 to F (hexadecimal), works together
with the PC control software.
⑤
IR
To connect with the IR receiver, works together with the IR
remote.
⑥
Power Port
To connect with the power adapter (DC24V).
⑦
2 x RCA
Dual-mono audio input, which can be connected with audio
source device such as a PC.
⑧
Digital Audio
Input
Fiber connector for digital audio input (PCM format only), it
can be connected with a device with fiber port, such as
blue-ray player.
6
7
8
9
10
1
2
3
4
5
2.2 Rear Panel
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No.
Name
Function
⑨
RS232
3-pole captive screw connector for serial control, it can be
connected with PC (Use a 3-pole captive to 9 pin female D
connector and serial control software) to control PT-AA140.
⑩
Audio
Output
To connect with audio output devices, such as speakers (To
select 70V or 100V depends on the input voltage of the
speakers). COM is for grounding (GND).
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MIC
Audio Player
DVD
Laptop
IR
Receiver
RemoteControl Panel
Speaker
Audio:
IR:
RS232:
3. System Connection
3.1 Usage Precaution
No working with empty load is allowed.
Speakers must be connected before power on.
3.2 System Diagram
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COM
70V 100V
Speaker
Speaker Speaker
Speaker
(100V/10W)
(100V/10W)
(100V/10W)
(100V/10W)
3.3 Audio Signal Connection
3.3.1 Audio Output
The PT-AA140 supports mono audio output, and the output voltage is 70V or
alterative 100V. With its dual-purpose design, it can be applied in different areas. The
end COM is for grounding. The amplifier to be connected is mono audio output with a
rated power at 40Watt, so PT-AA140 can be connected with several speakers in
parallel connection way (Total power mustn’t be more than 40Watt).
The following figure shows us how to connect with the speakers. Here we take the
100V/10W speakers for each as example.
Note: Speakers to be connected should be with constant pressure.
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Dial Switch, to select the MIC input mode,
includes MIC (dynamic microphone), 48V
(condenser microphone) and LINE
(normal audio or wireless microphone).
3.3.2 Audio Input
The PT-AA140 provides with 2 stereo audio inputs, one microphone input and one
digital fiber audio input. The following figure shows the audio input ports.
48V phantom power input
When the switch turns to “48V” (It has a good frequency characteristic, high input
impedance and high sensitivity in this mode), the MIC input will provide a 48V
phantom power. This is usually used for power supply for condenser microphone,
Connection is: “+” connects to positive, “-” connects to negative and “ ” to ground.
Note: In this mode, only condenser microphone can be connected with.
MIC input
When the switch turns to “MIC” (It has a low frequency characteristics, and wide
frequency response in this mode), the microphone input is used for connecting with
dynamic microphone. There are two different connections:
a) Unbalanced connection:
“+” and “ ” connect to ground, and “-” connects to signal.
“-” and “ ” connect to ground, and “+” connects to signal.
b) Balanced connection: “+” connects to positive, “-” connects to negative and “ ”
connects to ground.
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LINE input
When the switch turns to “LINE” (It has a low frequency characteristics, and wide
frequency response in this mode), the microphone input is used for connecting with
normal audio or wireless microphone output. There are two different connections:
a) Unbalanced connection:
“+” and “ ” connect to ground, and “-” connects to signal.
“-” and “ ” connect to ground, and “+” connects to signal.
b) Balanced connection: “+” connects to positive, “-” connects to negative and “ ”
connects to ground.
Digital Audio Input
The PT-AA140 provides with a fiber optical port to connect with digital audio source
device. With the SPF optical fiber, the audio signal can be transmitted faster, more
stable, reliable, and can be transmitted over a long distance without distortion.
Notice: This digital audio input can support/decode PCM format signal only. If the
CD/DVD is DTS or AC3 format, please set the player to PCM format output before
connect to PT-AA140.
3.4 System Application
The PT-AA140 can be applied in different occasions, such as classroom, small meeting
room, lecture hall, bar and hotel etc.
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Audio Source Selection:
1: Dual mono audio
2: Stereo audio
3: Digital fiber audio.
4. System Operation
4.1 Button Control
The buttons provides the control of volume/EQ control and switching. The LED
indicator will show the connecting status. The following content introduces audio
switching and EQ control in detail.
Operations: Press the corresponding button again for cyclic switching.
4.1.1 Audio switching
There are three switchable audio inputs, one 2xRCA input, one 3.5mm jack input, and
one digital fiber audio input, switchable through the buttons as below:
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Audio Mode Switching
Volume Adjustment:
▽: Turn down the volume
△: Turn up the volume
MUTE: Mute the output
4.1.2 Volume/EQ controlling
The line volume and MIC volume can be controlled by the buttons.
The MIC Volume/LINE volume/LINE bass/LINE treble will be selected by the buttons,
and controlled up/down/mute by the function buttons. Please check the picture
below:
For example, to turn up the line volume, you should select the “LINE” first, and then
press the button “ ”.
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Mute Mode:
MIC: Mute the
microphone volume.
LINE: Mute the line
volume.
SPEAKER: Unmute
Use to transmit the
infrared signal send
by the remote
controller.
Audio Controlling Modes
MIC: turn up/down the
microphone volume.
LINE: turn up/down the
line volume.
BASS: bass tuning
TREBLE: treble of line
volume.
Audio Source Selection:
1: 2 RCA dual-mono audio
input
2: 1 3.5mm jack
3: 1 Digital fiber audio
input
IR receiver, works together
with the IR remote. Please
point the IR remote at the IR
receiver when use, to avoid
getting out of control as
there is no signal detected.
3.5mm jack
Insert it into the
specialized
PT-AA140 socket
(3.5mm), to
connect the IR
receiver with
PT-AA140.
4.2 IR Remote Control
The PT-AA140 provides with an IR eye, with the IR Receiver and the IR remote, user
can control PT-AA140 remotely.
Notice: The IR Receiver and the IR remote are all offered for charge.
IR Remote
IR Receiver
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PC
4.3 RS232 Control
4.3.1 Connection with Computer
When the amplifier connects to the COM1 or COM2 of the computer with control
software, users can control it by that computer.
To control the amplifier, users should use a 3-pole male captive screw to 9-pin HD
female connector and use the public COM software.
4.3.2 RS232 Control Software
Installation
Connect the input source devices and the output device according to the system
diagram.
Copy the RS232 control software to one computer, and then connect the RS232
port of this computer and PT-AA140.
Double-click the EXE program to execute the software.
Here we take the software CommWatch.exe as example. The icon is showed as below:
Uninstallation Delete all the control software files in corresponding file path.
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Parameter Configuration area
Monitoring area, indicates if
the command sent works.
Command Sending area
4.3.3 Running Environment
While the control software is installed, we can activate the software through the
RS232 port and set the parameters, to make it able to send RS232 commands to
control 4PT-AA140.
4.3.4 Function Setting
With the control software, we can easily switch the input channel, mute the output,
check the working status, and adjust the volume etc. Please refer the details in RS232
Communication Commands.
The interface of the control software is showed as below:
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Command
Function Description
Feedback Code
1A1.
Switching the audio to input 1
A: 1 -> 1
2A1.
Switching the audio to input 2
A: 2 -> 1
3A1.
Switching the audio to input 3
A: 3 -> 1
0A0.
Mute Audio of MIC and Line out
Mute
1A0.
Mute audio of MIC
Mute MIC
2A0.
Mute audio of line out
Mute LIN
3A0.
Enable noise gate.
Gate On
4A0.
Disable noise gate.
Gate Off
0A1.
Unmute Audio
Unmute Audio
600%
Checking the working status
A: 1 -> 1
Volume of MIC : 50
Volume of LINE : 50
Bass of LINE : 4
Treble of LINE : 4
Ducking Off
601%
MIC volume up
Volume of MIC: 51
602%
MIC volume down
Volume of MIC: 51
603%
Line volume up
Volume of LINE: 51
604%
Line volume down
Volume of LINE: 51
605%
Bass level up
Bass of LINE: 4
606%
Bass level down
Bass of LINE: 4
607%
Treble level up
Treble of LINE: 4
608%
Treble level down
Treble of LINE: 4
609%
Initialization, back to the default setting
Init OK
610%
Enable/disable the ducking function.
Ducking off/Ducking
on
4.3.5 RS232 Command
Communication Protocol: RS232 Communication Protocol
Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none
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Command
Function Description
Feedback Code
4[x][x]%
Preset the volume level of ducking
function. [xx] arranges from [00] to [60].
61 degrees in total.
Ducking of LINE: 50
5[x][x]%
Preset MIC volume, [xx] arranges from
[00] to [60]. 61 degrees in total.
Volume of MIC: 50
7[x][x]%
Preset line volume, [xx] arranges from
[00] to [60]. 61 degrees in total.
Volume of LINE: 50
8[x][x]%
Preset the bass level, [xx] arranges from
[00] to [08]. 9 degrees in total.
Bass of LINE: 4
9[x][x]%
Preset the treble level, [xx] arranges
from [00] to [08]. 9 degrees in total.
Treble of LINE: 4
Note:
1) The letter inside bracket [ ] is the variable code, which is changeable.
2) The bracket [ ] is not included to the RS232 commands.
3) Any dot “.” after the letters is part of the commands.
4) Ducking function:
When input with MIC, the volume of the line audio will be automatically turned
down to the preset volume level, if there is no input MIC audio signal after 5
seconds, then the volume will be automatically turned up to the original one. If
you need to disable/enable the ducking function, just send the command “610%”
again.
5) ID coding
The ID codes of PT-AA140 ranges from 0 to F (hexadecimal), when sending RS232
commands, please take notice of the address of the ID code.
If the address of the ID code is 0, any RS232 command is available.
If the address is in 1~F, it has one unique ID code (If the ID code is not the same
with the address, no RS232 command will work).
While the ID code is in 1~F, please add “ID/” before sending the command.
For example, if the ID code is 5, the RS232 command needed is “604%”, the
correct command is in this format: 5/604%.
There is no need to add “ID/” before the command when the ID code is 0.
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Examples:
1) Switching the input 2 to the line out, the command is: 2A1.
2) Turning up the volume of line audio, the command is: 603%
3) Preset the MIC volume to “21” degree, the command is: 521%
4) Checking the working status of PT-AA140, the command is: 600%
5) If the ID code is 0, sending command 601% is able to turn up the MIC volume.
If the ID code is 2, sending command 601% will not work, and the MIC volume
remains unchanged. The right command is 2/601%.
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Audio Input
Input
(2) Stereo Audio
(1) MIC
(1) Digital Fiber Audio
Input Connector
(2) RCA
(1) 3.5mm Jack
(1) 3-pole 3.81mm Captive Screw Connector
(1) SPF Fiber Connector
Input Impedance
>10KΩ
Audio Output
Output
(1) Mono Amplifier
Output Connector
(1) 3-pole 3.81mm Captive Screw Connector
Output Type
Constant voltage 70V or 100V.
Audio General
Frequency Response
120Hz ~ 20KHz
CMRR
>70dB@20Hz~20KHz
SNR
80dB (Max)
Bandwidth
120Hz ~ 20KHz
Rated Power Output
40Watt
THD + Noise
1%@1KHz, 0.3%@20KHz at nominal level
Voltage Gain
26dB
Control Function
RS232 Control
(1) 3-pole 3.81mm Captive Screw Connector
Front Panel Control
Buttons
ID Code Control
16 ID Codes for control.
Optional
IR Remote & TCP/IP controlled by programmable
interface
5. Specification
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General
Temperature
-10 ~ +40℃
Humidity
10% ~ 90%
Power Supply
DC 24V 2.71A Power Adapter
Standby Power
Consumption
5W
Case Dimension
W130 x H44 x D144mm (1U high)
Product Weight
860g
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157 mm
130 mm
144 m
m
44 mm
13 mm
108 m
m
6. Panel Drawing
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Problems
Causes
Solutions
No output audio
No signal at input/ output
end
Check input/ output signal
by an oscilloscope or a
multimeter.
Failed cable connection
Change for another cable.
Broken unit
Send it to the dealer for
repairing.
POWER indicator doesn’t
work or no respond to any
operation
Failed power connection
Make sure the power cord
connection is good
Static becomes stronger
when connecting the
video connectors
Bad grounding
Check the grounding and
make sure it is connected
well.
Output audio is interfered
Cannot control the device
by front panel buttons,
RS232 port or IR remote
Broken unit
Send it to the dealer for
repairing.
7. Troubleshooting and Maintenance
If your problem persists after following the above troubleshooting steps, seek further
help from authorized dealer or our technical support.
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8. After-Sales Service
If there appear some problems when running the product, please check and deal with
the problems referring to this user manual. Any transport costs are borne by the users
during the warranty.
1) Product Limited Warranty: This product will be free from defects in materials and
workmanship for two years (The purchase invoice shall prevail).
Proof of purchase in the form of a bill of sale or receipted invoice which is
evidence that the unit is within the Warranty period must be presented to obtain
warranty service.
2) What the warranty does not cover (servicing available for a fee):
Warranty expiration.
Factory applied serial number has been altered or removed from the product.
Damage, deterioration or malfunction caused by:
Normal wear and tear.
Use of supplies or parts not meeting our specifications.
No certificate or invoice as the proof of warranty.
The product model showed on the warranty card does not match with the
model of the product for repairing or had been altered.
Damage caused by force majeure.
Servicing not authorized by distributor.
Any other causes which does not relate to a product defect.
Delivery, installation or labor charges for installation or setup of the product.
3) Technical Support: For any questions or problems, contact your distributor or
reseller and tell them the respective product name and version, the detailed
failure situation as well as the formation of the cases.
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Asking for Assistance
Technical Support:
Phone: +49 5971 800299 - 0
Fax: +49 5971 800299 – 99
Technical Support Hours:
8:30 AM to 5:00 PM Monday thru Thursday
8:30 AM to 4:00 PM Friday
Write to:
PureLink GmbH
Von-Liebig-Straße 10
D - 48432 Rheine
www.purelink.de
info@purelink.de
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