BG-UHD-KVM41-KIT
4-Port 4K 18Gbps UHD Conference Room HDMI/USB 3.0 KVM
Presentation Switcher Kit with 4 Table Grommets
User Manual
BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 2
BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
TABLE OF CONTENTS
Statement 4
Safety Precaution 4
Introduction 5
Features 5
Packing List 5
Technical Specifications 6
Button Control 12
Table Grommet Control 12
RS232 Control 13
Firmware Upgrade 15
Application Example 16
Tech Support 17
Limited Product Warranty Terms 17
Mission Statement 17
Copyright 18
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 3
BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Statement
Please read these instructions carefully before connecting, operating, or configuring this
product. Please save this manual for future reference.
Safety Precaution
● 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.
● To prevent damaging this product, avoid heavy pressure, strong vibration, or immersion
during transportation, storage, and installation.
● Do not dismantle the housing or modify the module.
● Using supplies or parts not meeting the products’ specifications may cause damage,
deterioration or malfunction.
● Do not put any heavy items on the extension cable in case of extrusion.
● Install the device in a place with fine ventilation to avoid damage caused by overheat.
● Do not twist or pull by force ends of the optical cable. It can cause malfunction.
● The housing of this product is made of organic materials. Do not expose to any liquid,
gas, or solids which may corrode the shell.
● Unplug this device during lightning storms.
● Do not use liquid or aerosol cleaners to clean this unit. Clean only with a soft dry
microfiber cloth.
● Always unplug the power to the device before cleaning.
● If an object or liquid falls or spills on to the housing, unplug the module immediately.
● To prevent the risk of electric shock, do not open the case. Installation and maintenance
should only be carried out by qualified technicians.
● Do not use the product beyond the specified temperature, humidity, or power supply
specifications.
● This product does not contain parts that can be maintained or repaired by users.
Damage caused by dismantling the product without authorization from BZBGEAR is not
covered under the warranty policy.
● Installation and use of this product must strictly comply with local electrical safety
standards.
● Product specifications may be subject to technical upgrades without further notice.
● 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.
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 4
BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Introduction
The BZ-UHD-KVM41-KIT is an HDMI 2.0 4x1 switcher with four SC-GRHU table grommets.
The switcher features four HDMI video inputs and one HDMI output. It supports HDMI video
resolution up to 4K2K@60Hz 4:4:4, HDR 10, and Dolby Vision. The switcher provides one
stereo audio output for audio de-embedding, and provides four type-B USB ports and three
type-A USB ports for KVM management. Up to four connected computers can be
controlled via one keyboard, mouse, and monitor while the switcher can be controlled via
RS232 and front panel buttons. In addition, the switcher features four GR ports to connect
SC-GRHU table grommets for source selection and blank screen settings.
Features
● 4x1 HDMI 2.0 Switcher with KVM.
● Video resolution up to 4K2K@60Hz 4:4:4, HDR 10, and Dolby Vision.
● HDCP 2.2 compliant.
● Compatible with Windows, Linux and Mac OS.
● 3.5mm stereo audio output for audio de-embedding.
● Convenient and cost-effective USB 3.0 peripheral sharing.
● Controls four HDMI computers via one keyboard, mouse, and monitor.
● KVM auto-switching based on TMDS/5V detection.
● Controllable by buttons, RS232 commands, and SC-GRHU table grommets.
● Simplifies wiring for easy installation.
Packing List
HDMI 2.0 4X1 Switcher:
● 1x BG-UHD-KVM41 HDMI 2.0 4x1 Switcher
● 2x Mounting Ears with 4 Screws
● 4x Plastic Cushions
● 4x 3-pin Terminal Blocks
● 1 x RS232 Cable (3-pin to DB9)
● 1 x Power Adapter (12VDC, 2A)
● 1x User Manual
● 1х Quick Start Guide
Table Grommet:
● 4x 1 BG-SC-GRHU Table Grommets
● 4x 1 3-pin Terminal Block
● 4x 2 Mounting Screws (PM3*8mm)
● 4 x 2 Mounting Screws
(PM3*16mm)
● 4 x 2 Mounting Screws
(PM3*25mm)
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Technical Specifications
BZ-UHD-KVM41-KIT Switcher
Video Input
Input
(4) SOURCE 1~4
Input Connector
(4) Female type-A HDMI
HDMI Input Resolution
Up to 4Kx2K@60Hz 4:4:4, HDR10, Dolby Vision
HDMI Standard
2.0
HDCP Version
2.2
Video Output
Output
(1) DISPLAY
Output Connector
(1) Female type-A HDMI
HDMI Output Resolution
Up to 4Kx2K@60Hz 4:4:4, HDR10, Dolby Vision
HDMI Standard
2.0
HDCP Version
2.2
Audio
Output
(1) AUDIO OUT
Output Connector
(1) 3.5mm mini stereo audio jack
Audio Format
PCM 2CH
Frequency Response
20Hz to 20KHz, ±1dB
Max Output Level
2.0Vrms ± 0.5dB. 2V = 16dB headroom above -10dBV (316 mV) nominal consumer line
level signal.
THD+N
< 0.05%, 20Hz - 20KHz bandwidth, 1KHz sine at 0dBFS level (or max level).
SNR
> 80dB, 20Hz - 20KHz bandwidth.
Crosstalk Isolation
< -80 dB, 10 kHz sine at 0dBFS level (or max level before clipping).
L-R Level Deviation
< 0.05 dB, 1 kHz sine at 0dBFS level (or max level before clipping).
Output Load Capability
1k Ohm and higher (supports 10x paralleled 10k ohm loads).
Noise Level
-80dB
Control
Control
(1) FW, (4) PC 1~4, (3) DEVICES 1~3, (4) GR 1~4, (1) RS232
Control Connector
(1) Micro-USB, (4) Type-B USB, (3) Type-A USB, (5) 3-pin Terminal Blocks
General
Bandwidth
18Gbps
Operation Temperature
14°F ~ +131°F / -10°C ~ +55°C
Storage Temperature
-25°F ~ +158°F / -25°C ~ +70°C
Relative Humidity
10%-90%
Type-A USB Power Supply
1A
System Power Supply
Input: 100V~240V AC; Output: 12V DC 2A
System Power Consumption
14W(Max)
Dimension (W*H*D)
7.9" x 1.6" x 3.9" [200mm x 40mm x 100mm]
Net Weight
1.5lbs [685g]
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 6
BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
BG-SC-GRHU Table Grommet
Video Input
Input
(1) HDMI
Input Connector
(1) Female type-A HDMI
Video Output
Output
(1) HDMI
Output Connector
(1) Female type-A HDMI
Control
Control Connector
(1) Type-B USB, (1) Type-A USB, (1) 3-pin Terminal Block
General
Resolution Range
Up to 4Kx2K@60Hz 4:4:4, HDR10, Dolby Vision
Operation Temperature
14-25°F ~ +131-25°F / -10°C ~ +55°C
Storage Temperature
-25-25°F ~ +158-25°F / -25°C ~ +70°C
Relative Humidity
10%-90%
Dimension (W*H*D)
3.0" x 1.2" x 3.0" [76mm x 29.6mm x 76mm]
Net Weight (g)
0.23lbs [105g]
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 7
BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Operation Controls and Functions
BZ-UHD-KVM41-KIT Switcher
● Front Panel
1. POWER LED: This LED will illuminate red when the device is connected to the
power supply.
2. PC LEDs 1-4: Each LED will illuminate blue to indicate its corresponding USB
type-B port is connected to an active PC.
3. SOURCE LEDs 1-4: Each LED will illuminate blue to indicate its corresponding
HDMI port is connected to an active source device.
4. SOURCE BUTTONS 1-4: Press buttons 1-4 to select input source. The
corresponding button will illuminate blue to indicate which source device is selected.
5. AUTO: Select this button to enable auto switching mode. It will illuminate blue when
enabled. Press again to exit auto switching mode.
6. FW: Micro-USB port for firmware upgrade.
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
● Rear Panel
7. HDMI SOURCE 1-4: Connect up to 4 HDMI source devices (PC, MAC, etc.).
8. USB PC 1-4: Four type-B USB ports to connect PCs. The PC can be a source
device connected to the corresponding HDMI input port.
9. DEVICES 1-3: Three USB type-A ports to connect USB peripherals devices
(keyboard, mouse, camera, etc.). These USB devices are used to control the PC
which is connected to the selected HDMI input port and the corresponding type-B
USB.
10. DISPLAY: Type-A female HDMI output port to connect display devices (e.g.
Projector).
11. AUDIO OUT: 3-pin terminal block to connect speakers or amplifiers for audio
output.
12. GR1-GR4: Four 3-pin terminal blocks to connect four BG-SC-GRHU table
grommets for source selection and black screen setting.
13. RS232: 3-pin terminal blocks to a control device (e.g. PC) to control the switcher.
14. DC 12V: Power port for power adapter connection.
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
BG-SC-GRHU Table Grommet
1. Show Me button: Press the button to select the HDMI input source.
2. Black Output: Press the button to output black screen for display.
3. HDMI Input: Connect to HDMI source device (e.g. PC).
4. USB 3.0 Type-B: Connect the PC to the port.
5. 3-pin terminal block: Connect to the GR1-GR4 port of the switcher.
6. HDMI Output: HDMI output port to connect the HDMI input port of the switcher.
7. USB 3.0 Type-A: Connect to the port of the switcher.
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Panel Drawing
● BG-UHD-KVM41-KIT Switcher
● BG-SC-GRHU Table Grommet
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Button Control
Manual-Switching
Press button 1~4 to the corresponding HDMI input source.
Auto-Switching
Press AUTO to enable auto switch mode, and then the button LED will illuminate blue.
When in auto mode, the switcher follows the rules in the certain circumstances:
● The switcher will automatically switch to the first available active input starting at
input 1 to 4.
● Pressing the source button (1, 2, 3 or 4) can directly change the input source.
● New Input: Upon detecting a new input, the switcher will automatically select the
new source.
● Detection input signal source: 5V(Default) or TMDS.
● Reboot: Once power is restored to the switcher, if the last selected source is still
available, the switcher will still output this signal, otherwise, the switcher will switch
to the first available active input starting at input 1.
● Source Removed: When an active source is removed, the switcher will switch to the
first available active input starting at input 1.
● Press AUTO again can exit auto switch mode, but the input source will remain the
current setting.
Note: The factory default is auto switching mode.
Table Grommet Control
The BG-SC-GRHU table grommet can be used for input source selection and blank screen.
Press Show Me on the table grommet to select an HDMI source.
Press Blank Output on the table grommet to let set the display to a black screen.
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
RS232 Control
Connect the switcher to the control device (e.g. PC) with RS232 cable and set the
parameters in the right manner, the control device is capable of controlling this switcher by
RS232 commands.
RS232 Command
Communication protocol: RS232 Communication Protocol
Baud rate: 9600
Data bit: 8
Stop bit: 1
Parity bit: none
Note: All commands need to be ended with “<CR><LF>”.
Device Control
Command
Description
Command Example and Feedback
#GET_FIRMWARE_VERSION
Get the software version.
@V1.0.0
#SET_KEYPAD_LOCK 0
Unlock the front panel buttons (Factory
default).
@FRONT PANEL UNLOCK!
#SET_KEYPAD_LOCK 1
Lock the front panel buttons.
@FRONT PANEL LOCK!
#GET_KEYPAD_LOCK
Get the locking status of front panel buttons.
@FRONT PANEL UNLOCK!
@FRONT PANEL LOCK!
#SET_HDMI_DETECTION_MODE 0
Set the detection method of HDMI source
input to 5V.
@INPUT_SIGNAL_DETECTION 0!
#SET_HDMI_DETECTION_MODE 1
Set the detection method of HDMI source
input to TMDS.
@INPUT_SIGNAL_DETECTION 1!
#GET_HDMI_DETECTION_MODE
Get the detection method of HDMI source
input.
@INPUT_SIGNAL_DETECTION 0!
@INPUT_SIGNAL_DETECTION 1!
#GET_STATUS
Get the system status.
@RS232 QUERY STATUS!
@BG-UHD-KVM41
@V1.0.0
@FRONT PANEL UNLOCK!
@HDMI OUT SWITCH TO AUTO MODE!
@HDMI IN SWITCH TO 1!
@OUTPUT_HDCP 0!
@INPUT_SIGNAL_DETECTION 1!
@IIS OUT ON!
@RS232 BAUDRATE IS 1!
#FACTORY_RESET
Restore factory default
@FACTORY DEFAULT!
@BG-UHD-KVM41
@V1.0.0
@HDMI OUT SWITCH TO AUTO MODE!
@OUTPUT_HDCP 0!
@IIS OUT ON!
@INPUT_SIGNAL_DETECTION 0!
@HDMI IN SWITCH TO 1!
@USB SWITCH MODE TO 0!
@RS232 BAUDRATE IS 1!
#REBOOT
Reboot the device.
@REBOOT
#HELP
Get all commands and its usage.
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Signal Switching
Command
Description
Command Example and Feedback
#SET_AV H1
Switch to HDMI source 1.
@HDMI IN SWITCH TO 1!
#SET_AV H2
Switch to HDMI source 2.
@HDMI IN SWITCH TO 2!
#SET_AV H3
Switch to HDMI source 3.
@HDMI IN SWITCH TO 3!
#SET_AV H4
Switch to HDMI source 4.
@HDMI IN SWITCH TO 4!
#GET_AV
Get the current HDMI source.
@HDMI IN SWITCH TO 1!
#SET_AUTO_SWITCH 1
Enable auto switching (Factory default).
@HDMI OUT SWITCH TO AUTO MODE!
#SET_AUTO_SWITCH 0
Disable auto switching
@HDMI OUT SWITCH TO MANUAL MODE!
#GET_AUTO_SWITCH
Get the auto switching status.
@HDMI OUT SWITCH TO AUTO MODE!
@HDMI OUT SWITCH TO MANUAL MODE!
Audio Setting
Command
Description
Command Example and Feedback
#SET_IIS 1
Turn on stereo audio output.
@IIS OUT ON!
#SET_IIS 0
Turn off stereo audio output.
@IIS OUT OFF!
#GET_IIS
Get the stereo audio output status.
@IIS OUT ON!
@IIS OUT OFF!
EDID Management
Command
Description
Command Example and Feedback
#SET_EDID_MODE
[PARAM]
[PARAM]= 0000~0011
[PARAM]=0000, set the EDID mode to Pass-through
(Factory default). If the source device can’t read EDID
from display device, it will use the built-in
EDID: 3840x2160@60Hz Deep Color Stereo Audio.
[PARAM]=0001/0010/0011, set the EDID of source
device to user-defined EDID 0001/0010/0011.
#SET_EDID_MODE 0000
@EDID_MODE 0000!
#GET_EDID_MODE
Get the EDID mode.
@EDID_MODE 0000!
#EDIDR [PARAM]
Get the EDID value.
[PARAM]= 0000~0011
@EDID HEX STRING OF
'0000':
00 FF FF FF FF FF FF 00 41
0C F2 08 50 12 00 00
… …
#UPLOAD_USER_EDID
[PARAM]
[PARAM]=0001/0010/0011, upload user-defined EDID.
When the command applied, system prompts to upload
the EDID file (.bin). Operation will be canceled in 10
seconds.
#UPLOAD_USER_EDID
0001
@PLEASE SEND THE EDID FILE!
… …
@RECEIVED THE FILE, LENGTH=256!
@EDID0001 UPDATE SUCCESSFULLY!
HDCP Setting
Command
Description
Command Example and Feedback
#SET_OUTPUT_HDCP 0
Set the HDCP mode of HDMI output to PASSIVE mode
(Factory default). The HDCP of HDMI output
automatically follows the HDCP version of source device.
@OUTPUT_HDCP 0!
#SET_OUTPUT_HDCP 1
Set the of HDMI output to ACTIVE mode.
@OUTPUT_HDCP 1
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Command
Description
Command Example and Feedback
If the input video has HDCP content, the HDCP version
of HDMI output is HDCP
1.4 for broader video solution.
If the input video has no HDCP content, the HDMI output
has no HDCP too.
#GET_OUTPUT_HDCP
Get the HDCP mode of HDMI output.
@OUTPUT_HDCP 0!
Baudrate Setting
Command
Description
Command Example and Feedback
#SET_RS232_BAUD 1
Set RS232 baudrate to 9600.
@RS232 BAUDRATE IS 1!
#SET_RS232_BAUD 2
Set RS232 baudrate to 19200
@RS232 BAUDRATE IS 2!
#SET_RS232_BAUD 3
Set RS232 baudrate to 38400
@RS232 BAUDRATE IS 3!
#SET_RS232_BAUD 4
Set RS232 baudrate to 57600
@RS232 BAUDRATE IS 4!
#SET_RS232_BAUD 5
Set RS232 baudrate to 115200
@RS232 BAUDRATE IS 5!
#GET_RS232_BAUD
Get the RS232 baudrate.
@RS232 BAUDRATE IS 1!
Display Control
Command
Description
Command Example and Feedback
#SET_THE_DISPLAY_TO 0
Set the display to output black screen, and no
audio output.
@THE DISPLAY SIDE SCREEN IS BLACK!
@THE DISPLAY IS ALREADY OFF!
#SET_THE_DISPLAY_TO 1
Wake up the display screen.
@WAKE UP THE SCREEN!
@THE DISPLAY IS ALREADY ON!
#GET_THE_DISPLAY
Get the status of display screen.
@THE DISPLAY IS OFF!
@THE DISPLAY IS ON!
Firmware Upgrade
Please follow the steps as below to upgrade firmware by the FW port on the front panel:
1) Prepare the latest upgrade file (.bin) and rename it as “FW_MERG.bin” on PC.
2) Power off the switcher, and connect the FW port of the switcher to the PC with a
USB cable.
3) Power on the switcher, and then the PC will automatically detect a U-disk named
“BOOTDISK”.
4) Double-click the U-disk, a file named of “READY.TXT” would be showed.
5) Directly copy the latest upgrade file (.bin) to the “BOOTDISK” U-disk.
6) Reopen the U-disk to check the filename “READY.TXT” whether automatically
becomes “SUCCESS.TXT”, if yes, the firmware was updated successfully,
otherwise, the firmware updating is fail, the name of upgrade file (.bin) should be
confirm again, and then follow the above steps to update again.
7) Remove the USB cable after firmware upgrade.
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
8) After firmware upgrade, the switcher should be restored to factory default by
sending RS232 commands.
Application Example
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Tech Support
Have technical questions? We may have answered them already!
Please visit BZBGEAR’s support page (bzbgear.com/support) for helpful information and
tips regarding our products. Here you will find our Knowledge Base
(bzbgear.com/knowledge-base) with detailed tutorials, quick start guides, and step-by-step
troubleshooting instructions. Or explore our YouTube channel, BZB TV
(youtube.com/c/BZBTVchannel), for help setting up, configuring, and other helpful how-to
videos about our gear.
Need more in-depth support? Connect with one of our technical specialists directly:
Phone
1.888.499.9906
Email
support@bzbgear.com
Live Chat
bzbgear.com
Limited Product Warranty Terms
Pro Line: 5-year warranty from the date of purchase for AV/Broadcasting products bought
on or after August 1, 2024.
Essential Line: 3-year warranty from the date of purchase for AV/Broadcasting products
bought on or after August 1, 2024.
Cables: Lifetime Limited Product Warranty.
For complete warranty information, please visit bzbgear.com/warranty.
For questions, please call 1.888.499.9906 or email support@bzbgear.com.
Mission Statement
BZBGEAR is a breakthrough manufacturer of high-quality, innovative audiovisual equipment
ranging from AVoIP, professional broadcasting, conferencing, home theater, to live
streaming solutions. We pride ourselves on unparalleled customer support and services.
Our team offers system design consultation, and highly reviewed technical support for all
the products in our catalog. BZBGEAR delivers quality products designed with users in
mind.
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BZBGEAR BG-UHD-KVM41-KIT PRODUCT MANUAL
Copyright
All the contents in this manual and its copyright are owned by BZBGEAR. No one is allowed
to imitate, copy, or translate this manual without BZBGEAR’s permission. This manual
contains no guarantee, standpoint expression or other implies in any form. Product
specification and information in this manual is for reference only and subject to change
without notice.
All rights reserved. No reproducing is allowed without acknowledgement.
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