BG-8K-HS41AR
8K UHD 4×1 HDMI Switcher – HDMI 2.1, 48Gbps, 8K60/4K120, HDR,
Audio De-Embedding, EDID Management, Signal Generator
User Manual
BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 2
BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Statement 4
Safety Precaution 4
Introduction 5
Features 5
Packing List 6
Specifications 7
Operation Controls and Functions 9
IR Remote 12
ASCII Communication Protocol Overview 13
ASCII Commands 13
Error Codes 13
Commands 13
Notes on getting status 16
Connection Diagram 18
Troubleshooting 19
Tech Support 20
Limited Product Warranty Terms 20
Mission Statement 21
Copyright 22
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 3
BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Statement
Please read these instructions carefully before connecting, operating, or configuring this
product. Please save this manual for future reference.
Safety Precaution
● To prevent damaging this product, avoid heavy pressure, strong vibration, or immersion
during transportation, storage, and installation.
● The housing of this product is made of organic materials. Do not expose to any liquid,
gas, or solids which may corrode the shell.
● Do not expose the product to rain or moisture.
● 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.
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 4
BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Introduction
The BG-8K-HS41AR is an ultra-thin 4×1 switcher designed for high-performance AV
applications. It features three HDMI 2.1 inputs, one USB-C input, and one HDMI
output, supporting resolutions up to 8K@60Hz 4:2:0 12-bit (HDMI) and 8K@30Hz
4:2:2 10-bit (USB-C). This switcher is fully compliant with DP 1.4 and HDCP 2.3,
and supports advanced video technologies including HDR10, HDR10+, Dolby
Vision, and HLG pass-through. With support for HDMI 2.1 features such as VRR,
ALLM, QMS, QFT, and SBTM, along with multichannel audio pass-through for Dolby
Atmos, DTS:X, and LPCM 7.1CH, it delivers an immersive audio-visual experience.
The BG-8K-HS41AR offers easy control via front-panel buttons, IR remote, and
supports both manual and auto-switching between active inputs. Built-in EDID
management can be configured using a 3-pin DIP switch on the front panel, with
EDID status displayed on the connected monitor. Additional features include CEC
control for simplified TV-to-source communication and firmware updates through
the service port, making this switcher a versatile solution for home theater, gaming,
and professional AV installations.
Features
● UHD USB-C Quality: Supports resolutions up to 8K@30Hz (4:2:2, 10-bit) and
4K@120Hz (4:2:2, 10-bit) via USB-C
● UHD HDMI Quality: Supports resolutions up to 8K@60Hz (4:2:0, 12-bit), 8K@30Hz
(4:4:4, 12-bit), and 4K@120Hz (4:4:4, 12-bit)
● Input Switching Options: Supports automatic and manual input switching,
controllable via front panel buttons and IR remote
● CEC Control Functionality: Enables CEC pass-through control from the display
(output) to the source device (input)
● Audio Pass-Through: Supports LPCM 7.1CH, Dolby TrueHD, Dolby Atmos,
DTS-HD Master Audio, and DTS:X audio formats
● HDR Pass-Through: Passes through HDR formats, including HDR, HDR10,
HDR10+, Dolby Vision, and HLG
● Advanced HDMI 2.1 Features: Supports VRR (Variable Refresh Rate), ALLM (Auto
Low Latency Mode), QMS (Quick Media Switching), QFT (Quick Frame Transport),
and SBTM (Source-Based Tone Mapping)
● Flexible Input & Output Configuration: Features 3 × HDMI inputs and 1 × USB-C
input, routed to a single HDMI output
● Advanced EDID Management: Includes customizable EDID settings for flexible
compatibility with various displays and sources
● Industry Compliance: Compliant with DisplayPort 1.4 and HDCP 2.3 standards
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Packing List
● 1x BG-8K-HS41AR Switcher
● 1x IR Remote
● 1x 5pin-3.5mm Phoenix Connector (male)
● 1x 3pin-3.5mm Phoenix Connector (male)
● 1x IR Wideband Receiver Cable (1.5m)
● 2x Mounting Ear
● 4x Machine Screw (KM3*4)
● 1x 12V/1A Multinational Locking Power Supply
● 1x User Manual
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Specifications
Technical
HDMI Compliance
HDMI 2.1
HDCP Compliance
HDCP 2.3
Video Bandwidth
48Gbps
Audio Latency
No Latency
Video Latency
No Latency
Video Resolution
Up to 8K60 YCbCr 4:2:0 12bit, 8K30 RGB/YCbCr 4:4:4 12bit or
4K120 RGB/YCbCr 4:4:4 12bit
Color Depth
8/10/12-bit
Color Space
RGB, YCbCr_4:4:4, YCbCr_4:2:2, YCbCr_4:2:0
HDR
HDR, HDR10, HDR10+, Dolby Vision, HLG
IR Level
12Vp-p
IR Frequency
Wideband 20K–60KHz
Audio Formats
HDMI input/output: LPCM, Dolby Digital/Plus/EX, Dolby True HD,
Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD
Master Audio, DSD
Audio de-embedding output:
Optical: Up to LPCM/Dolby/DTS 5.1CH, Analog: Only LPCM 2CH
Mechanical
ESD Protection
IEC 61000-4-2: ±8kV (Air-gap discharge) & ±4kV (Contact discharge)
Input
4x HDMI IN [Type A, 19-pin female]
Output
1x HDMI OUT [Type A, 19-pin female]; 1x OPTICAL AUDIO OUT
[S/PDIF, female]; 1x L/R AUDIO OUT [5pin-3.5mm Phoenix
connector]
Control Ports
1x RS-232 [3pin-3.5mm Phoenix connector]; 1x IR CTL [3.5mm
stereo mini-jack]; 1x SERVICE [USB Type C, Update port]
Housing
Metal Enclosure
Silkscreen Color
Black
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Dimensions
(W×D×H)
8.7in × 4.3in × 0.85in / 220mm × 110mm × 21.5mm
Weight
1.3 lbs [595g]
Power Supply
Input: AC100 - 240V 50/60Hz
Output: DC 12V/1A (US/EU standards, CE/FCC/UL certified)
Power Consumption
5.4W (Max)
Operating
Temperature
14°F ~ 113°F / -10°C ~ 45°C
Storage
Temperature
-4°F ~ 140°F / -20°C ~ 60°C
Relative Humidity
20~90% RH (non-condensing)
Recommended
HDMI Cable
Lengths
8K: 2m/6.6ft (Ultra HDMI 2.1);
4K60: 8m/26ft;
4K24: 12m/39ft;
1080P: 15m/49ft
Note: Use “Premium High Speed HDMI” cable is highly
recommended.
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Operation Controls and Functions
Front and Rear Panel
No.
Name
Function Description
1
POWER
button
Press the POWER button to power on/off the device.
2
POWER
LED
The power LED lights in green when the device is working, and red when the
device is in standby.
3
SELECT
button
Signal source selection button. Pressing this button will allow the device to
switch any of the four HDMI input signals to the HDMI OUT port.
4
IN LED
(1~4)
When the HDMI IN 1/2/3/4 port is selected as the signal source input channel,
the corresponding green LED will be on.
5
OUT LED
When the HDMI OUT port connects a display device and outputs signal, the
green LED will be on.
6
IR Window
IR input signal receiving window.
7
SERVICE
USB-C port for firmware update, software debugging, and API commands
controlling.
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
8
EDID DIP
switch
Use the 4-pin DIP switch to set EDID information.
0000 – EDID pass-through (Copy from Sink 1) (factory default)
0001 – HDMI 1080p@60Hz, Audio 2CH PCM
0010 – HDMI 1080p@60Hz, Audio 5.1CH DTS/DOLBY
0011 – HDMI 4K@60Hz 4:4:4, 8-bit, Audio 2CH PCM
0100 – HDMI 4K@60Hz 4:4:4, 8-bit, Audio 5.1CH DTS/DOLBY
0101 – HDMI 4K@120Hz 4:4:4, 10-bit HDR/DV, Audio 2CH PCM
0110 – HDMI 4K@120Hz 4:4:4, 10-bit HDR/DV, Audio 5.1CH DTS/DOLBY
0111 – HDMI 4K@120Hz 4:4:4, 12-bit HDR/DV, Audio 2CH PCM
1000 – HDMI 4K@120Hz 4:4:4, 12-bit HDR/DV, Audio 5.1CH DTS/DOLBY
1001 – HDMI 8K@60Hz 4:2:0, 10-bit HDR/DV, Audio 2CH PCM1010 – HDMI
8K@60Hz 4:2:0, 10-bit HDR/DV, Audio 5.1CH DTS/DOLBY
1011 – HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 2CH PCM
1100 – HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 5.1CH DTS/DOLBY
1101 – HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 2CH PCM – Inc VRR/DSC
1110 – HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 5.1CH DTS/DOLBY – Inc
VRR/DSC
1111 – EDID Software if possible or HDMI 1080p@60Hz, Audio 2CH PCM
9
HDMI IN
port (1~4)
HDMI signal input ports, connected to HDMI source devices such as DVD or PS5
using HDMI cables.
10
HDMI OUT
port
HDMI signal output port, connected to an HDMI display device such as a TV or
monitor using an HDMI cable.
11
OPTICAL
(AUDIO
OUT)
Optical fiber audio output port.
12
L+ L- R+ R-
(AUDIO
OUT)
Analog audio output port, supporting balanced (max 2Vrms) and unbalanced
(max 1Vrms) audio output.Balanced: L+, L-, R+, R-Unbalanced: L+, R+
13
RS-232
RS-232 serial port, used for API commands control.
14
IR CTL
12V IR signal receiving port.
15
DC 12V
DC 12V/1A power input port.
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
IR Cable Pin Assignment
The IR receiver cable pin assignment is as follows:
Note:
● When the angle between the IR receiver and the remote control is within ±45°, the
effective transmission distance is 0–5 meters.
● When the angle is within ±90°, the transmission distance extends up to 8 meters.
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
IR Remote
Power
Press the POWER button to turn the device on or set it to standby
mode.
Input Selection
1 / 2 / 3 / 4: Press any of these buttons to switch the HDMI OUT port
to the corresponding HDMI IN 1 / 2 / 3 / 4 input source.
CYCLE: Press this button to cycle through HDMI input sources 1 to 4
sequentially and output the selected source to the HDMI OUT port.
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 12
BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
ASCII Communication Protocol Overview
● Service Port: USB-C virtual RS-232 (Internal debug)
● Baud Rate (Service Port): 115200 (Fixed)
● Data Bit: 8
● Stop Bit: 1
● Parity Bit: None
● Command End Mark: <CR><LF>
ASCII Commands
Error Codes
Code
Description
E00
Unknown command
E01
Parameter out of range
E02
Error reading EDID data
Commands
Command
Code
Description
Example
Feedback /
Response
Factory
Default
?
List all commands
?
List all commands
—
help
List all commands
help!
List all commands
—
get fw
version
Get firmware version
get fw
version
mcu boot:
vx.xx.xxmcu app:
vx.xx.xx
—
set power
on/off
Power the device on/off
set power
on / set
power off
power onsystem
initializing...
initialization finished!
fw version x.xx.xx
power off
—
get power
Get power status
get power
power on / power off
—
set reboot
Reboot device
set reboot
reboot...system
initializing...
initialization finished!
fw version x.xx.xx
—
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
set reset
Factory reset
set reset
reset to factory
defaultssystem
initializing...
initialization finished!
fw version x.xx.xx
—
get status
Get system status
get status
See note below
—
set IR
on/off
Enable/disable IR
set IR on /
set IR off
IR on / IR off
on
get IR
Get IR status
get IR
IR on / IR off
—
set key
on/off
Enable/disable front panel key
set key on /
set key off
key on / key off
on
get key
Get front panel key status
get key
key on / key off
—
set baud x
Set RS‑232 baud rate (x =
1–6)
set baud 6
baud rate 115200
115200
Baud
options
1 = 4800, 2 = 9600, 3 =
19200, 4 = 38400, 5 = 57600,
6 = 115200
—
—
—
get baud
Get RS‑232 baud rate
get baud
baud rate 115200
—
set input x
Select input video (x = 0–4)
set input 1
input HDMI 1
1
Input
options
0 = Off, 1–4 = HDMI input 1–4
—
—
—
get input
Get input port
get input
input HDMI 1
—
get hdmi5v
Get HDMI 5 V status
get hdmi5v
HDMI 1: 5VHDMI 2:
noneHDMI 3:
5VHDMI 4: none
—
set
autoswitch
x
Enable/disable auto switching
(HDMI 5 V detection)
set
autoswitch
on
autoswitch on /
autoswitch off
on
get
autoswitch
Get auto switching status
get
autoswitch
autoswitch on /
autoswitch off
—
set output
display y
Set display mode (y = 0–3)
set output
display 2
output display off /
input video / AVMUTE
/ internal pattern
1
Display
modes
0 = Off, 1 = Input video, 2 =
AVMUTE, 3 = Internal pattern
—
—
—
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
get output
display
Get display mode
get output
display
output display off /
input video / AVMUTE
/ internal pattern
—
set output
HDCP y
Set HDCP (y = 0–4)
set output
HDCP 1
output HDCP follow
sink / follow source /
force HDCP 1.4 /
force HDCP 2.2
1
HDCP
modes
0 = Reserved, 1 = Follow sink,
2 = Follow source, 3 = Force
HDCP 1.4, 4 = Force HDCP
2.2
—
—
—
get output
HDCP
Get HDCP mode
get output
HDCP
output HDCP follow
sink / follow source /
force HDCP 1.4 /
force HDCP 2.2
—
set analog
mute x
Mute analog audio (x =
On/Off)
set analog
mute on
analog mute on /
analog mute off
off
get analog
mute
Get analog mute status
get analog
mute
analog mute on /
analog mute off
—
set analog
gain x
Set analog audio gain (0 dB to
–79 dB)
set analog
gain –79dB
analog gain –79dB
0dB
get analog
gain
Get analog audio gain
get analog
gain
analog gain –79dB
—
set
generator x
y
Set generator resolution (x =
1–15) and pattern (y = 1–13)
set
generator 1
1
generator 8K30Hz
color bar
—
Generator
resolution
01 = 8K 30Hz, 02 = 4K 120Hz,
03 = 4K 100Hz, 04 = 5K 60Hz,
05 = 5K 50Hz, 06 = 5K 30Hz,
07 = 5K 25Hz, 08 = 5K 24Hz,
09 = 4K 60Hz, 10 = 4K 50Hz,
11 = 4K 25Hz, 12 = 4K 24Hz,
13 = 1080p 60Hz, 14 =
480p 60Hz, 15 = 5760p 50Hz
—
—
—
Generator
pattern
01 = Color bar, 02 =
Checkerboard, 03 = Strip, 04
= Red, 05 = Green, 06 = Blue,
07 = White, 08 = Ramp, 09 =
Red ramp, 10 = Green ramp,
11 = Blue ramp, 12 = PRBS,
13 = Black
—
—
—
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
get
generator
Get generator settings
get
generator
generator 8K30Hz
color bar
—
set edid x
to y
Set EDID for input ports (x =
0–4)
set edid 0
to 0set edid
1 to 1
Reflects EDID set for
inputs
See
default
below
EDID input
options
x = 0 (all inputs), 1–4 = HDMI
inputs 1–4
—
—
—
EDID
presets
00 = HDMI 1080p 60Hz, 2CH
PCM (default), 01–17 = 4K
options, 18–26 = 8K options
w/ VRR/DSC, 27–29 =
DVI/HDMI 1920x1200, 30–31
= User EDIDs, 32 =
Pass-through
—
—
—
get edid x
Read EDID settings
get edid 0
Shows EDID for
inputs
—
get edid
data x
Read raw EDID data
get edid
data 0
Hex dump of EDID
from inputs
—
set user
edid x <y>
Set user-defined EDID (x =
1–2, y = 256-byte EDID)
set user
edid 1 <00
FF FF FF
…>
User EDID loaded
successfully
—
get user
edid x
Get user-defined EDID
get user
edid 1
Shows user EDID
data
—
Notes on getting status
● The output spans multiple lines.
● Intermediate lines end with <LF><CR>.
● The final line ends with <CR><LF>.
Connection Diagram
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
Troubleshooting
Problems
Causes
Solutions
No Power / All LED off
Power supply not connected,
connected fully, or wrong power
supply.
Check if the power supply is
connected correctly and the
output voltage value is within
recommended specifications.
No sound or sound issues
The HDMI connection is faulty,
the audio format is not
supported by the displays, or
the source player is set to
another port for audio output
Check if the HDMI cables are
connected correctly.
Check if the audio format is
supported by the display and
that a user has not changed the
supported audio format on the
player`s audio output. Ensure
output settings from the HDMI
source device as set correctly.
No picture or picture flickers
The HDMI cable may be faulty
or the category cable quality is
faulty.
Check if the HDMI
and category cable connections
are correct and undamaged.
Change to another good
working HDMI cable or category
cable (CAT6 or better cable is
recommended).
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BZBGEAR BG-8K-HS41AR 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.
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BZBGEAR BG-8K-HS41AR PRODUCT MANUAL
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.
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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