PTN PA3V User Manual

User Manual

PA3V

PTN 40W Power Amplifier

All Rights Reserved

Version: PA3V2013V1.0

40W Power Amplifier

Date

Update Content

1.0

2013.05.03

First version.

This manual is only for operation instruction only, not for any maintenance usage.
The functions described in this version are updated till May, 2013. Any changes of
functions and parameters since then will be informed separately. Please refer to
the dealers for the latest details.

This manual is copyright PTN Electronics Limited. All rights reserved. No part of
this publication may be copied or reproduced without the prior written consent of
PTN Electronics Limited.

All product function is valid till 2013-05-03.

NOTICE: Please read this user manual carefully before using this product.

Update History

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40W Power Amplifier

Table of Contents

1. Introduction ................................................................................................................. 1

1.1 Introduction to PA3V .......................................................................................... 1

1.2 Features ............................................................................................................ 1

1.3 Package Contents ............................................................................................. 1

2. Introduction of Product Appearance ............................................................................ 2

2.1 Introduction of Front Panel ................................................................................ 2

2.2 Introduction of Rear Panel ................................................................................. 3

3. System Connection ..................................................................................................... 4

3.1 Usage Precautions ............................................................................................ 4

3.2 System Diagram ................................................................................................ 4

3.3 Audio Signal Connection .................................................................................... 4

3.3.1 Audio Output ............................................................................................ 4

3.3.2 Audio Inputs ............................................................................................. 5

3.4 System Applications ........................................................................................... 6

4. System Operations ..................................................................................................... 6

4.1 Operations of Front Panel .................................................................................. 6

4.1.1 Audio switching ........................................................................................ 6

4.1.2 Volume/EQ controlling ............................................................................. 7

4.2 Operations of IR Remote ................................................................................... 7

4.3 Operations of Control Software.......................................................................... 8

4.3.1 Connection with Computer ...................................................................... 8

4.3.2 Installation/uninstallation of RS232 Control Software .............................. 8

4.3.3 Running Environment .............................................................................. 9

4.3.4 Function Settings ..................................................................................... 9

4.3.5 RS232 Communication Commands ...................................................... 10

5. Specifications ............................................................................................................ 12

6. Panel Drawing .......................................................................................................... 13

7. Troubleshooting and Maintenance ............................................................................ 13

8. Safety Operation Guide ............................................................................................ 14

9. After-sales Service .................................................................................................... 15

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1. Introduction

1.1 Introduction to PA3V

PA3V 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 PA3V is designed to integrate with both voltages to meet different requirements.

1.2 Features

 Mono audio output at 40Watt.
 Switchable between 70V and 100V.
 Ducking function.
 16 ID codes for controlling between different PA3V 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.
 Antistatic case design to provide good protection for long-term and stable

performance.

1.3 Package Contents

 1 x PA3V
 1 x Power adapter (DC 24V)
 2 x Mounting ears (separated from PA3V)
 1 x RS232 cable
 1 x IR remote (not included, buy it separately)
 1 x IR receiver (not included, buy it separately)
 4 x Screws
 1 x User manual

Note: Please confirm if the product and the accessories are all included, if not, please
contact with the 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

2. Introduction of Product Appearance

2.1 Introduction of Front Panel

Figure 1 Front Panel

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No.

Name

Function

①

Power

Indicator

Turns red when power on.

②

Microphone

input port

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 Eye

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, it can be connected
with a device with fiber port, such as blue-ray player.

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 PA3V.

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).

2.2 Introduction of Rear Panel

Figure 2 Rear Panel

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3. System Connection

3.1 Usage Precautions

1) No working with empty load is allowed.

2) Speakers must be connected before power on.

3.2 System Diagram

Figure 3 System Diagram

3.3 Audio Signal Connection

3.3.1 Audio Output

PA3V 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 PA3V 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
speakers 10Watt@8Ohms for each as example.

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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).

Figure 4 Audio Output Connection

3.3.2 Audio Inputs

PA3V provides with 2 stereo audio inputs, one microphone input and one digital fiber
audio input. The following figure shows the audio input ports.

Figure 5 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.

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Audio Source Selection:
1: Dual mono audio

2: Stereo audio
3: Digital fiber audio.

b) Balanced connection: “+” connects to positive, “-” connects to negative and “ ”

connects to ground.

 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
PA3V 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.

3.4 System Applications

PA3V can be applied in different occasions, such as classroom, small meeting room,
lecture hall, bar and hotel etc.

4. System Operations

4.1 Operations of Front Panel

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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Figure 6 Audio Source Selection Button

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Audio Mode Switching

Volume Adjustment:

▽: Turn down the volume
△: Turn up the volume

MUTE: Mute the output

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

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:

Figure 7 Audio Mode and Volume Adjustment buttons

For example, to turn up the line volume, you should select the “LINE” first, and then
press the button “ ”.

4.2 Operations of IR Remote

PA3V provides with an IR eye, with the IR Receiver and the IR remote, user can control
PA3V remotely.

Notice: The IR Receiver and the IR remote are all offered for charge.

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Figure 8 IR Remote

40W Power Amplifier

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 PA3
socket (3.5mm), to
connect the IR
receiver with PA3.

Figure 9 IR Receiver

4.3 Operations of Control Software

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 Installation/uninstallation of 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 PA3V.
 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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Figure 10 Connection of RS232 Port

Figure 11 Control Software

40W Power Amplifier

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 PA3V.

4.3.4 Function Settings

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:

Figure 12 Main Interface of Control Software

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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

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[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

4.3.5 RS232 Communication Commands
Communication Protocol: RS232 Communication Protocol

Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none

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Notice:

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 PA3V 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.
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 PA3V, 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

Audio Output

Input

2 stereo audio
1 MIC
1 Digital fiber audio

Output

1 mono amplifier

Input
Connector

2 RCA
1 3.5mm jack
1 3-pole 3.81mm

captive screw
connector
1 SPF fiber connector

Output
Connector

1 3-pole 3.81mm
captive screw
connector

Input
Impedance

>10KΩ

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 @8Ohms

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 PTNET(PTN's programmable
interface)

General

Temperature

-20 ~ +70℃

Humidity

10% ~ 90%

Power
Supply

DC 24V power
adapter

Power
Consumption

5W

Case
Dimension

W153 x H44 x
D144mm (1U high)

Product
Weight

0.86Kg

5. Specifications

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6. Panel Drawing

Figure 13 Panel Drawing

7. Troubleshooting and Maintenance

1) When there is no output audio:

 Check if there is any signal at the input.

 Check if there is any signal at the output.

We can check these by using an oscilloscope or a multimeter. If there is no signal

input/output, maybe the input/output cables broken or the connectors loosen, please

change for another cable.

 Check if the output port number is the same with the controlled one.

 If not the problem mentioned above, probably there is something broken inside the

unit, please send it to the dealer for repairing.

2) If the POWER indicator doesn’t work or no respond to any operation, please make

sure the power cord connection is good.

3) If the output sound is interfered, please make sure the system is grounded well.

4) If the static becomes stronger when connecting the audio connectors, it probably

due to bad grounding, please check the grounding and make sure it connected well,

otherwise it would damage the amplifier.

5) If the PA3V amplifier cannot be controlled by the keys on the front panel, RS232 port

or the IR remote, the unit may has already been broken. Please send it to the dealer

for repairing.

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8. Safety Operation Guide

In order to guarantee the reliable operation of the equipments and safety of the staff,
please abide by the following proceeding in installation, using and maintenance:

1) The system must be earthed properly. Please do not use two blades plugs and

ensure the alternating power supply ranged from 100v to 240v and from 50Hz to

60Hz.

2) Do not put the switcher in a place of too hot or too cold.

3) As the power generating heat when running, the working environment should be

maintained fine ventilation, in case of damage caused by overheat.

4) Please cut off the general power switch in humid weather or left unused for long

time.

5) Before following operation, ensure that the alternating current wire is pull out of the

power supply:

 Take off or reship any components of the equipment.

 Take off or rejoin any pin or other link of the equipment.

6) As to non-professional or without permission, please DO NOT try to open the casing

of the equipment, DO NOT repair it on your own, in case of accident or increasing

the damage of the equipment.

7) DO NOT splash any chemistry substance or liquid in the equipment or around.

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9. After-sales Service

1) If there appear some problems when running PA3V, please check and deal with the

problems reference to this user manual. Any transport costs are borne by the users

during the warranty.

2) You can email to our after-sales department or make a call, please tell us the

following information about your cases.

 Product version and name.

 Detailed failure situations.

 The formation of the cases.

3) We offer products for all three-year warranty, which starts from the first day you buy

this product (The purchase invoice shall prevail).

4) Any problem is same with one of the following cases listed, we will not offer warranty

service but offer for charge.

 Beyond the warranty.

 Damage due to incorrectly usage, keeping or repairing.

 Damage due to device assembly operations by the maintenance company

non-assigned.

 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.
Remarks: For any questions or problems, please try to get help from your local

distributor, or email PTN at: [e-mail].

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Tel: [phone]

Fax: [phone]

Email: [e-mail]
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