VTRIX DMH32 User manual

HDMI 2.0 Seamless Switching Media Hub
4K HDMI 2.0
Seamless Switching Media Hub
Version 1.0
Warning
Do not expose this device to Rain, Moisture, and Dripping
Only use accessories specified by the manufacture
Unplug this device during Lightning Storms
The manual is for reference only, maybe updated without
further notice

HDMI 2.0 Seamless Switching Media Hub
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Content
1. FEATURES 3
2. PANEL LAYOUT 4
3. EDID AND HDCP HANDLE 6
4. VIDEO AND AUDIO 7
5. SPECIFICATION 8
6. PACKAGE CONTENTS 8
7. MOUNTING DIMENSIONS 9
8. RS232 COMMAND 9

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Introduction
The Seamless Switching Media Hub has 2x HDMI2.0 Input ports，1x USB-C(video only) Input
port，1x HDMI2.0 output port and 1x HDBaseT mirror output port. The HUB integrated
with AC port, LAN port,5V/2A charging port. User can easily manage it via the front
buttons, RS232 commands.
Application Field: Meeting Room
1. Features
2x HDMI and 1x USB-C(video only）Inputs, support input video resolution
up to 3840x2160@60
1x HDMI and 1x HDBaseT mirror outputs，support output video resolution
up to 3840x2160@60
1xAC port，2x LAN ports，1x 5V/2A Charging USB-A port
Support Seamless Switching
Support Auto Switching
Support LPCM, AC3, DD+, DTS, DTS-HD, up to 7.1 audio channel；
Extensive EDID and HDCP control；

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2. Panel Layout
Front Panel
NO.
Name
Description
1
AC Port
AC Port
2
5V/2A
USB-A Port，Support 5V/2A Charging
3
HDMI 1
HDMI 1 Input signal selection button（with Led inside）
Long press this button for 3 seconds will change the output
resolution to 3840*2160@60;
4
HDMI 2
HDMI2 Input signal selection button（with Led inside）
Long press this button for 3 seconds will change the output
resolution to 3840*2160@50 Hz
5
USB-C
USB-C Input signal selection button（with Led inside）
Long press this button for 3 seconds will change the output
resolution to 3840*2160@30 Hz
6
AUTO
Press AUTO button to enable or disable auto switching function
（with Led inside）
Long press this button for 3 seconds will change the output
resolution to 1080P@60 Hz
7
LAN
LAN port ， directly connect to the LAN port on the Rear
Panel
8
HDMI 1
HDMI 1 Input port

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NO.
Name
Description
9
HDMI 2
HDMI 2 Input port
10
USB-C
USB-C ( video only）input port
11
ShowMe
Press ShowMe button to enable or disable the image displaying.
When the inside Led is lit ， the video will be normal
displayed, otherwise will display black screen or blue
screen according to VKA setting）;
Long press this button for 3 seconds will change the output
resolution to 1080P@50Hz
Rear Panel
NO.
Name
Description
1
RS232 control
Baud rate 9600, 8 data bits, 1 stop bit, no parity
PIN 2 TX ( Hub → PC)
PIN 3 RX ( Hub ←PC )
2
EDID
Switcher
Select EDID mode
See the definition of EDID SWITCH for details
3
HDBaseT out
HDBaseT output port

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4
HDMI out
HDMI output port
5
RESERVE
6
LAN
LAN port，directly connect to the LAN port on the Front
Panel
7
100-240VAC
AC Port，Input Voltage Range is 100-240V
8
L/R
3.5mm LR audio output port
9
SERVICE
USB-A port，Used for firmware update
3. EDID and HDCP handle
User can select following EDID modes by RS232 command
Number
EDID mode
Number
EDID mode
1
AUTO
10
1080P-7.1CH
2
4K60-2.0CH
11
720P
3
4K60-5.1CH
12
1920x1200
4
4K60-7.1CH
13
1680x1050
5
4K30-2.0CH
14
1600x1200
6
4K30-5.1CH
15
1440x900
7
4K30-7.1CH
16
1360x768
8
1080P-2.0CH
17
1280x1024
9
1080P-5.1CH
18
1024x768
Before using RS232 command to select the EDID mode, the FOLLOW SWITCH
setting must be OFF (refer the RS232 command list)
When the FOLLOW SWITCH setting is OFF, The default EDID mode is 4K60-2.0
The EDID SWITCH is defined as follows
Number
EDID mode
Number
EDID mode
0,0,0,0
AUTO
1,0,0,0
1080P-5.1CH
0,0,0,1
4K60-2.0CH
1,0,0,1
1080P-7.1CH
0,0,1,0
4K60-5.1CH
1,0,1,0
720P
0,0,1,1
4K60-7.1CH
1,0,1,1
1920x1200

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0,1,0,0
4K30-2.0CH
1,1,0,0
1600x1200
0,1,0,1
4K30-5.1CH
1,1,0,1
1360x768
0,1,1,0
4K30-7.1CH
1,1,1,0
1280x1024
0,1,1,1
1080P-2.0CH
1,1,1,1
1024x768
To using the bottom EDID switch to select EDID mode, three steps should be
taken:
1. The FOLLOW SWITCH RS232 setting must be ON
2. Select the desired EDID mode by the bottom EDID switch
3. The hub must power on again
The HDMI/HDBaseT output support 3 HDCP options: FORCE-1.4, FORCE-2.2,
FORCE-OFF, User can select it by RS232 command
4. Video and Audio
The Hub support multiple resolution video input up to 3840x2160@60, and support
multiple audio format such as LPCM, AC3, DD+, DTS, DTS-HD, up to 7.1 channel
pass through function via HDMI cable
Please note, USB-C input port can only accept LPCM 2.0 audio
The Hub support following video output resolution by a powerful scaling engine
Number
Output Resolution
Number
Output Resolution
1
4096x2160p 60Hz
8
1920x1080p 60Hz
2
4096x2160p 50Hz
9
1920x1080p 50Hz
3
3840x2160p 60Hz
10
1360x768p 60Hz
4
3840x2160p 50Hz
11
1280x800p 60Hz
5
3840x2160p 30Hz
12
1280x720p 60Hz
6
3840x2160p 25Hz
13
1280x720p 50Hz
7
1920x1200p60Hz RB
14
1024x768 60Hz
User can select different output resolution by RS232 command

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5. Specification
Band Width
594MHz (18Gbps), HDMI 2.0,
HDCP2,2
Audio Format
LPCM, AC3, DD+, DTS, DTS-HD
Up to 7.1 channel
Input ports
2x HDMI，1x USB-C
Output ports
1x HDMI
1x HDBaseT
1x 3.5mm LR audio
1x 5V/2A USB-A Charging port
Power Supply
25W max
Operating
Temperature
0 to +40°C (+32 to +104 °F)
Operating Humidity
10 to 70 % RH (non-condensing)
ESD
Air: ± 8KV, Contact: ± 4KV,
Dimensions
Mass (Main Unit)
6. Package Contents
Item
Quantity
Hub Unit
1
AC Power Cord
1

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7. Mounting dimensions
8. RS232 command
Note: All the commands begin with SET or GET, end with Carriage Return (CR).
Represents Carriage Return (CR). All return messages are end with CR
System command
Command
Details
GET HELP
Get the Commands list
SET RESET
Recover to default setting
GET VERSION
Get firmware version
Return: VERSION w (w is version number)
Switching command
Commands
Details
SET AUTO SWITCH w
w is ON or OFF, default OFF
Return: AUTO SWITCH w
GET AUTO SWITCH
Return: AUTO SWITCH w

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SET IN SOURCE w
w is one of the following:
HDMI1, HDMI2, USB-C
Return: IN SOURCE w
GET IN SOURCE
Get current input channel selection information
Return: IN SOURCE w
GET IN RESOLUTION
Get current input resolution
Return: IN RESOLUTION w (w is input resolution)
SET FOLLOW SWITCH w
w is ON or OFF, default ON
Return: FOLLOW SWITCH w
GET FOLLOW SWITCH
Return: FOLLOW SWITCH w
Output command
Commands
Details
SET OUT RESOLUTION w
w is one of the following, default: 3840x2160p60
4096x2160p60, 4096x2160p50,
3840x2160p60, 3840x2160p50,
3840x2160p30, 3840x2160p25,
1920x1200p60RB, 1920x1080p60,
1920x1080p50, 1360x768p60,
1280x800p60, 1280x720p60,
1280x720p50, 1024x768p60
Return: OUT RESOLUTION w
GET OUT RESOLUTION
Get current output resolution setting
Return: OUT RESOLUTION w
SET OUT HDCP w
w is one of following, default FORCE-1.4
FORCE-1.4,FORCE-2.2,FORCE-OFF
Return: OUT HDCP w
GET OUT HDCP
Return: OUT HDCP w
SET OUT VKA w
w is BLUESCREEN or BLACKSCREEN.
Default BLACKSCREEN. It is for no signal display

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Return: OUT VKA w
GET OUT VKA
Return: OUT VKA w
SET SHOWME w
w is ON or OFF, default ON
Return: SHOWME w
SET OUT ITC w
w is ON or OFF, default OFF
Return: OUT ITC w
GET OUT ITC
Return: OUT ITC w
EDID command
The following commands are used to set EDID mode for the inputs
Commands
Details
SET IN EDIDMODE w
w is one of the following:
4K60-2.0, 4K60-5.1, 4K60-7.1, 4K30-2.0,
4K30-5.1, 4K30-7.1, 1080p60-2.0,1080p60-5.1,
1080p60-7.1,1920x1200, 1680x1050, 1600x1200,
1440x900, 1360x768, 1280x1024, 1024x768, 720p,
AUTO
Default: 4K60-2.0
Return: IN EDIDMODE w
GET IN EDIDMODE
Return: IN EDIDMODE w