PTN MVG88A User manual

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
MVG88A
PTN VGA/Stereo Audio Matrix Switcher 8x8
USER MANUAL
Version: MVG88A2013V1.1

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
NOTICE: Please read this user manual carefully before using this product.
Update History
Version
Date
Update Content
1.0
2010.01.01
First Version.
1.1
2013.05.29
Modified the system diagram.
This manual is 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 2013-05-29.

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
Table of Contents
1. Introduction ...............................................................................................................1
1.1. Introduction of MVG88A ...................................................................................1
1.2. Package Contents ............................................................................................1
2. Features....................................................................................................................1
3. Specification..............................................................................................................1
4. Operations of the Control panel and the Remote Controller .....................................3
4.1. Operation of the Control Panel .........................................................................3
4.2. Usage of the Remote Controller .......................................................................4
5. External Connection..................................................................................................5
5.1. Introduction of the Input and Output Connectors..............................................5
5.2. How to Connect with the Input and Output Terminals.......................................6
5.3. Connection with RS232 Communication Port...................................................7
5.4. Connection with Computer ...............................................................................7
5.5. Audio Signal Connection ..................................................................................7
6. System Diagram........................................................................................................8
7. Communication Protocol and Command Codes .......................................................9
8. Safety Operation Guide...........................................................................................11
9. Troubleshooting & Maintenance..............................................................................12
10.After-sales Service..................................................................................................13

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
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1. Introduction
1.1. Introduction of MVG88A
MVG88A is an 8x8 VGA matrix switcher following with stereo audio, it supports audio
follow and audio breakaway switching. With bandwidth up to 350MHz(-3db), it supports
crosspoint switching. It shows a good application in broadcast room, television teaching
room, commanding center etc.
1.2. Package Contents
1 x MVG88A
1 x Power cord
1 x IR remote (The cell battery is not included)
16 x Captive screw connectors
4 x Plastic cushions
1 x RS232 cable
1 x User manual
2. Features
Video bandwidth up to 350MHz.
Audio follow or audio breakaway switching.
Fast switching speed in 200ns.
Power-fail protection, allows switcher restore to previous settings.
10 presets to save and recall switching patterns.
Front panel lockout.
Controllable via button, IR & RS232.
3. Specification
Video Input
Video Output
Input
8 VGA
Output
8 VGA
Input
Connector
Female 15 pin HD
Output
Connector
Female 15 pin HD
Input
Coupling
AC coupling only
Switching Type
Vertical interval
Input Level
0.5 ~ 2.0Vp-p
output Level
0.5 ~ 2.0Vp-p
Input
Impedence
75Ω
Output
Impedence
75Ω
Video General
Gain
0 dB
Bandwidth
350MHz (-3dB), fully
load
Video Signal
RGBHV,RGBS,
RGsB, RsGsBs,
Video Type
RGBHV,RGBS,
RGsB, RsGsBs,

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
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component video,
S-video, and
composite video .
component video,
S-video, and
composite video .
Switching
Speed
200ns (Max.)
Crosstalk
<-50dB@5MHz
Audio Input
Audio Output
Input
8 stereo,
balanced/unbalanced
Output
8 stereo,
balanced/unbalanced
Input
Connector
Captive screw
connector, 5 pole
Output
Connector
Captive screw
connector, 5 pole
Input
Impedance
>10KΩ
Output
Impedance
50Ω
Audio General
Frequency
Response
20Hz ~ 20KHz
CMRR
>90dB@20Hz~20KHz
Stereo
Channel
Separation
>80dB@1KHz
THD + Noise
1%@1KHz,
0.3%@20KHz at
nominal level
Control Parts
Serial
Control Port
RS-232, 9-pin female
D connector
Pin
Configurations
2 = TX, 3 = RX, 5 =
GND
IR Remote
Default IR remote
Front Panel
Control
Buttons
Options
TCP/IP control by PTNET(PTN's programmable interface)
General
Power
Supply
100VAC ~ 240VAC,
50/60Hz
Power
Consumption
25W
Temperature
-20 ~ +70℃
Humidity
10% ~ 90%
Case
Dimension
W483 x H87 x
D260mm
(2U high, full rack
wide)
Product Weight
3.5Kg

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
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4. Operations of the Control panel and the Remote Controller
4.1. Operation of the Control Panel
①Input Channel ②Output Channel ③Function Buttons ④Power indicator
F4-1 Front Panel
Detailed Description:
Buttons
Function Description
INPUTS
Input buttons, ranging from "1" to "8".
OUTPUTS
Output buttons, ranging from "1" to "8".
AV
AV synchronal button: To transfer video and audio signal
synchronously by the switcher.
Example: To transfer both the video and the audio signals
from input channel No.3 to output channel No.4.
Operation: Press buttons in this order “AV”,“3”, “4””.
VIDEO
Video button: To transfer only video signals from input
channel to output channel
Example: To transfer video signals from input channel No.3
to output channel No.4.
Operation: Press buttons in this order “VIDEO”, “3”, “4”.
AUDIO
Audio button: To transfer only audio signals from input
channel to output channel
Example: To transfer audio signals from input channel No.2
to output channel No.3.
Operation: Press buttons in this order “AUDIO”, “2”, “3”
ALL
All button: To transfer an input channel to all output channels or
switch off all the output channels.
Example1: To transfer video and audio signals from input
channel No.7 to all output channels.
Operation: Press buttons in this order “7”, “ALL”.
Example2: To transfer all input signals to the corresponding
output channels respectively. In another word, to switch to this
status: 1->1, 2->2, 3->3, 4->4……8->8.
Operation: Press buttons in this order “ALL”, “THROUGH”.

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
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UNDO
Undo button: To resume to the status before the command just
performed.
Backspace button: To backspace the latest input button.
THROUGH
Through button: To transfer the signals directly to the
corresponding output channels.
Example: To transfer the signals from input channel No. 3 to
their corresponding output channels.
Operation: Press buttons in this order “3”, “THROUGH”.
Note: With the front control panel, the switcher could be control directly and rapidly by
pressing the buttons under below format.
“Menu” +“Input Channel” +“Output Channel”
1) “Menu”: “AV”, “VIDEO”, “AUDIO”
2) “Input Channel”: Fill with the number of input channel to be controlled.
3) “Output Channel”: Fill with the number of output channels to be controlled.
4.2. Usage of the Remote Controller
With the infrared remote controller, the matrix switcher could be control remotely.
Because the function buttons on the remote controller are the same with the ones on
the front control panel, the remote controller shares the same control operation and
command format with the control panel.
Operations of the remote controller are showed as follows.

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
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F4-2 Panel of the Remote Controller
5. External Connection
5.1. Introduction of the Input and Output Connectors
①②③④⑤⑥
F5-1 Rear panel
The outputs
channels, from
0~9, and plusing
“10+” for more.
The inputs
channels, from
0~9, and plusing
“10+” for more.
Menu, for
switching source
and function.

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
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Detailed description:
No.
Name
Description
①
VGA INPUTS
VGA input channels, 8 in total. Female 15-pin
connector.
②
AUDIO INPUTS
Audio input channels, 8 in total. Phoenix connector.
③
VGA OUTPUTS
VGA output channels, 8 in total. Female 15-pin
connector.
④
AUDIO OUTPUTS
Audio output channels, 8 in total. Phoenix connector.
⑤
RS232
Serial control port, 9-pin female connector.
⑥
AC100V~240V
Alternating current for power supply.
5.2. How to Connect with the Input and Output Terminals
The MVG matrix switchers may take laptops, desktop computers, graphic
workstations and document cameras as their input signal source, and projectors, RP
TVs, displayers and amplifiers as their output signal destinations.
The MVG matrix switchers support all kinds of the RGB and VGA signal sources with
15-PIN HD VGA connectors. The 15-PIN HD VGA connector is shown as below.
F5-2 15-PIN HD VGA connector
Pin
RGB
YcbCr
Pin
RGB
YcbCr
1
R
Cr
9
Not used
2
G
Y
10
Sync signal ground
3
B
Cb
11
Not used
4
Not used
12
Not used
5
Ground
13
H or H/V
6
R ground
Cr ground
14
V
7
G ground
Y ground
15
Not used
8
B ground
Cb ground
If the RGB device doesn’t with VGA output terminals, please convert the signals with an
RGB to VGA switcher for getting high quality VGA output effects.
Please use the special VGA signal cord to connect the input and output devices and
connect the 15-Pin HD connectors carefully.
15
6
10
1115

VGA/Stereo Audio Matrix Switcher 8x8
PTN Electronics Limited www.PTN-electronics.com
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5.3. Connection with RS232 Communication Port
Except the front control panel, infrared remote controller (Optional) and the Ethernet
control (Optional), the MVG matrix switcher can be controlled from far-end control
systems via the RS232 communication port. This RS232 communication port is a
female 9-pin D connector. The definition of its pins is as the table below.
No. Pin Function
1 N/u Unused
2 Tx Transmit
3 Rx Receive
4 N/u Unused
5 Gnd Ground
6 N/u Unused
7 N/u Unused
8 N/u Unused
9 N/u Unused
F5-3 9HDF
5.4. Connection with Computer
When the switcher connects to the COM1 or COM2 of the computer with control
software, users can control it by that computer.
Please refer the details in Communication Protocol and Command Codes.
RS-232
Computer for controlling
Converter
F5-4 MVG connecting to computer
5.5. Audio Signal Connection
Audio connection is little complicated than video. It has two kinds of connection:
balanced and unbalanced.
The balanced connection transmits a pair of balanced signals with two signal cords.
Because interferences will have the same intensity and the opposite phases on the two
signal cords, it will be counteracted in the end. For the low frequency extent of the audio
signal, it would be easily interfered under long distance transmission. Therefore,as an
anti-interference connection, it is mostly used in audio connection of special device.
The unbalanced connection transmits signals only with a signal cord. Without