Mini Digital Amplifier USER MANUAL PA2B PTN Mini Digital Amplifier Version: PA2B2013V1.2 PTN Electronics Limited www.PTN-electronics.
Mini Digital Amplifier NOTICE: Please read this user manual carefully before using this product. This manual is for operation instruction only, not for any maintenance usage. The functions described in this version are updated till January 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.
Mini Digital Amplifier Table of Contents 1. Introduction .............................................................................................................. 1 1.1. Introduction to PA2B ........................................................................................ 1 1.2. Package Contents ........................................................................................... 1 2. Features ................................................................................................
Mini Digital Amplifier 1. Introduction 1.1. Introduction to PA2B PA2B is a compact-size digital amplifier (Class-D) with 3 inputs (2 line in and 1 balanced MIC). It is integrated with powerful functions, including bridge connection, dual-mono, EQ control, microphone mixer etc. It has a good application in different places, including classroom, small meeting room, lecture hall, bar, pub etc. 1.2. Package Contents 1 x PA2B (The mounting ears and PA2B are as a whole.
Mini Digital Amplifier 3. Specification Audio Input Input Input Connector Input Impedance Audio General Frequency Response SNR Audio Output 2 stereo audio, 1 MIC 2 RCA 1 3.5mm jack 1 captive screw connector (3P,3.81mm), Output 1 amplifier, 1 stereo audio Output Connector 1 3.5mm jack 1 captive screw connector (4P, 5.
Mini Digital Amplifier Connecting the four pins, like this 4.1.2. Bridge connection: 1x40Watt@8Ohm The PA2B has the bridge connection, to double the output power at 1x40Watt@8Ohm. It will sum up the input left channel and input right channel to be mono output, and the power is up to 40Watt. The bridge connection is: Connecting the two pins, like this 4.1.3. Dual-mono Output The PA2B also has the function of double-mono output. It can sum up the left and right channel, to be the mono audio output.
Mini Digital Amplifier 4.2. Microphone input The microphone input of PA2B has three modes, and different modes use different connections, as the picture below: 4.2.1. 48V phantom power input When the switch turns to “48V”, 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. 4.2.2.
Mini Digital Amplifier 5. Operation of the Control Panel and the IR Remote 5.1. Operation of the Control Panel The buttons provides the control of volume/EQ control and switching. The following content introduces audio switching and EQ control in detail. 5.1.1. Audio switching There are two switchable stereo audio inputs, one 2xRCA input, and one 3.5mm jack input, switchable through the buttons as below: Source Selection 5.1.2.
Mini Digital Amplifier For example, to turn up the line volume, you should select the “LINE” first, and then press the button “ ”. 5.2. Usage of the IR Remote Audio Inputs Use to transmit the infrared signal send by the IR remote. 2 RCA dual-mono audio inputs 1 3.5mm jack Audio Controlling Modes Mute Mode: MIC: turn up/down the microphone volume. MIC: Mute the microphone volume. LINE: turn up/down the line volume. LINE: Mute the line volume.
Mini Digital Amplifier 6. System Diagram 7. Communication Protocol and Command Codes Communication Protocol: RS232 Communication Protocol Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none 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 0A0. Mute Audio of MIC and Line out Mute Audio 1A0. Mute audio of MIC Mute MIC 2A0. Mute audio of line out Mute LIN 0A1.
Mini Digital Amplifier 601% 602% 603% 604% 605% 606% 607% 608% MIC volume up MIC volume down Line volume up Line volume down Bass level up Bass level down Treble level up Treble level down 609% Initialization, back to the default setting 5[x][x]% 7[x][x]% 8[x][x]% 9[x][x]% Preset MIC volume, [xx] arranges from [00] to [60]. 61 degrees in total. Preset line volume, [xx] arranges from [00] to [60]. 61 degrees in total. Preset the bass level, [xx] arranges from [00] to [08]. 9 degrees in total.
Mini Digital Amplifier 8. Panel Drawing PTN Electronics Limited 9 www.PTN-electronics.
Mini Digital Amplifier 9. Troubleshooting & 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.
Mini Digital Amplifier 10. 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.
Mini Digital Amplifier 11. After-sales Service 1) If there appear some problems when running PA2B, 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.
