BG-4K-88MA
8x8 4K UHD HDMI 2.0 Matrix Switcher with Audio De-embedding
and Independent Routing (4K60 - 4:4:4 and HDR Support)
User Manual
BZBGEAR BG-4K-88MA PRODUCT MANUAL
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
TABLE OF CONTENTS
Statement 4
Safety Precaution 4
Introduction 5
Features 5
Packing List 6
Specifications 7
Supported Input/Output Resolutions 8
Operation Controls and Functions 9
LCD Display Navigation 11
EDID Presets 11
Custom EDID 12
Network 12
Maintenance 12
IR Remote 13
Web GUI User Guide 15
Status Page 17
Video Page 17
Matrix Page 18
Input Page 19
Output Page 20
Ext-Audio Page 22
CEC Page 23
Network Page 24
System Page 25
RS-232 Control Command 26
Connection Diagram 37
Troubleshooting 38
Tech Support 39
Limited Product Warranty Terms 39
Mission Statement 40
Copyright 40
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 3
BZBGEAR BG-4K-88MA 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.
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
Introduction
The BG-4K-88MA is a professional-grade 8x8 HDMI™ matrix switcher designed to
distribute ultra-high-definition video and multi-channel digital audio from up to eight
HDMI™ sources to eight HDMI™ displays. Supporting resolutions up to 4K@60Hz
4:4:4 and a bandwidth of 18 Gbps, this matrix delivers pristine image quality and
robust performance for demanding AV environments.
Designed with flexibility in mind, the BG-4K-88MA allows independent routing of
video and audio signals, with built-in audio de-embedding to extract analog stereo
or digital optical audio from either the HDMI™ input or the ARC return channel of
the HDMI™ output. Each HDMI™ output also supports automatic downscaling from
4K/2K to 1080p (no frame rate conversion), ensuring compatibility with legacy
displays.
Control options include front panel buttons, IR remote, RS-232, LAN, an intuitive
Web GUI, and our Switch Control App, making integration seamless in both
residential and commercial AV systems.
Features
● HDCP 2.2 Compliant – Ensures secure content transmission from source to display.
● Supports 18Gbps Video Bandwidth – Handles high-performance video signals
with ease.
● Up to 4K2K@60Hz 4:4:4 Resolution – Compatible with HDMI™ 2.0b for
crystal-clear Ultra HD video.
● HDR Pass-Through – Supports HDR, HDR10, HDR10+, Dolby Vision LLM, and HLG
for vivid color and contrast.
● Independent HDMI™ Video and Audio Routing – Allows flexible signal
management for advanced AV setups.
● 4K/2K to 1080p Downscaling – Each output port supports resolution downscaling
(no frame rate conversion).
● HDMI™ Audio Support Up to 7.1-Channel HD – Delivers rich, immersive sound.
● Audio De-Embedding – Extracts audio from HDMI™ input or ARC and outputs via
analog L/R and digital optical.
● ARC, CEC, and Smart EDID Management – Enhances compatibility and control
between devices.
● Multiple Control Options – Operate via front panel buttons, IR remote, RS-232,
LAN, or Web GUI.
● 1U Rack-Mountable Design – Compact enclosure with front panel LCD display for
easy integration and monitoring.
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
Packing List
● 1× 4K 8×8 HDMI™ Matrix
● 1× 24V/3.75A Power Adapter
● 1× IR Remote
● 1× IR Wideband Receiver Cable (1.5m)
● 1× RS-232 Serial Cable (1.5m, male to female
head)
● 8× 5pin-3.5mm Phoenix Connector
● 8× Machine Screw (KM3*6)
● 2× Mounting Ear
● 1× User Manual
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
Specifications
Technical
HDMI™
Compliance
HDMI™ 2.0b
HDCP
Compliance
HDCP 2.2
Video Bandwidth
18Gbps
Video Resolution
Up to 4K60Hz 4:4:4
* All available resolutions are shown as follows.
Color Space
RGB, YCbCr_4:4:4, YCbCr_4:2:2, YCbCr_4:2:0
Color Depth
8/10/12-bit
HDR Formats
HDR, HDR10, HDR10+, Dolby Vision LLM, HLG
Audio Formats
HDMI™ IN/OUT:
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 BREAKOUT:
Optical outputs: Up to LPCM/Dolby/DTS 5.1CH
Analog Audio Outputs: LPCM 2CH (sample rate 32~192kHz)
ESD Protection
IEC 61000-4-2: ±8kV (Air-gap discharge) & ±4kV (Contact discharge)
Connection
Input ports
8× INPUT [HDMI™ Type A, 19-pin female]
Output ports
8× OUTPUT [HDMI™ Type A, 19-pin female] 8×
OPTICAL AUDIO OUT
8× L/R AUDIO OUT [5-pin phoenix connector]
Control ports
1 × TCP/IP [RJ45]
1 × RS-232 [D-Sub9]
1 × IR EXT [3.5mm audio jack]
Mechanical
Housing
Metal Enclosure
Color
Black
Dimensions
17in × 8.1in × 1.8in / 440mm [W] × 206mm [D] × 44.5mm [H]
Weight
5.25 lbs [2.38kg]
Power Supply
Input: AC 100 - 240V 50/60Hz, Output: DC 24V/3.75A
(US/EU standard, CE/FCC/UL certified)
Power
Consumption
Full Load: 52.3W; Stand-by: 2.6W
Operating
Temperature
32 - 104°F / 0 - 40°C
Storage
Temperature
-4 - 140°F / -20 - 60°C
Operating
Humidity
20%~80% relative humidity, non-condensing
Storage Humidity
10%~90% relative humidity, non-condensing
Video Resolution
4K60
4K30
1080P
HDMI™ Cable
Length
(IN / OUT)
5m/16ft
10m/33ft
15m/49ft
The use of “Premium High Speed HDMI™” cable is highly recommended.
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
Supported Input/Output Resolutions
Category
Resolution
Supported Refresh Rates (Hz)
SD
640×480p
60
720×480i / 480p
59.94
720×576i / 576p
50
PC
800×600p
60
1024×768p
60
1280×1024p
60
1360×768p
60
1440×900p / 1050p
60
1600×1200p
60
HD
1280×720p (720p)
50, 59.94, 60
1920×1080i (1080i)
50, 59.94, 60
1920×1080p (1080p)
23.98, 24, 25, 29.97, 30, 50, 59.94,
60
Ultra HD
3840×2160 (2160p)
23.98, 24, 25, 29.97, 30, 50, 59.94,
60
4K DCI
4096×2160
23.98, 24, 25, 29.97, 30, 50, 59.94,
60
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
Operation Controls and Functions
Front Panel
NO.
Name
Function Description
1
LCD screen
Display matrix switching status, input/output port, EDID, baud rate, IP
Address, etc.
2
IR
IR signal receiver. Receiving the signal from the IR remote.
3
FNC
Multi-function button.
FNC + Number (1~8): Select the input source for all output
channels. Number (1~8) means the input source (1~8).
FNC + FNC + 1: Display IP address.
FNC + FNC + 2: Display the baud rate of the serial port.
Note: The info above will disappear automatically in 3 seconds.
4
POWER button &
indicator light
To power on the device, press the button; the light will turn blue.
Long-press the button for 3 seconds to enter standby mode, during
which the light will be red.
5
MENU / ENTER
/ UP /DOWN
Screen operation buttons. Take RESET, for example.
① On the initial LCD display screen, press the “MENU” button.
There are OUTPUT SETTINGS/INPUT SETTINGS/AUDIO
BREAKOUT/SETUP/FIRMWARE items to be selected.
② Press the “UP/DOWN” button to select the SETUP item.
③ Press the “ENTER” button to enter the next level.
There are LCD ONTIME/BAUDRATE/NETWORK/REBOOT/
RESET items to be selected.
④ Press the “UP/DOWN” button to select the RESET item.
⑤ Press the “ENTER” button, and it will prompt to confirm. Now
press "FNC" to continue, or press "MENU" to return.
Note: Pressing the “MENU” button will return to the previous
menu on any page.
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
6
INPUT / OUTPUT
(1~8)
buttons
Press a number (1~8) first to select an output channel, and then
press a number (1~8) to select the corresponding input source.
Rear Panel
NO.
Name
Function Description
1
AUDIO
OUTPUTS
(1~8)
OPTICAL: Optical audio output port, connected to an audio
An output device, such as an audio amplifier.
L/R AUDIO: Analog audio output port, supporting balanced/
unbalanced audio output, with a maximum support of 2Vrms.
Balanced connection method: L+, L -, , R+, R-
Unbalanced connection method: L+, , R+
2
TCP/IP
TCP/IP control port, connected to a PC or router with an RJ45
cable
3
RS-232 port
Connects to a PC or control system to control the matrix.
4
IR EXT
Connects to a 12V wideband IR receiver cable.
If the IR receiver window of the unit is blocked or the unit is
installed in a closed area out of the infrared line of sight, the IR
receiver cable can be inserted into the “IR EXT” port to receive the
IR remote signal.
5
HDMI INPUTS
(1~8)
HDMI input ports, connected to an HDMI source device such as
8K computer, DVD, or set-top box with HDMI cable.
6
HDMI OUTPUTS
(1~8)
HDMI output ports, connected to an HDMI display device such as
as a TV or monitor with an HDMI cable.
7
POWER 24V
Connects to a 24V/3.75A power supply.
8
GND
Connects the housing to the ground.
Note:
1. You can restore the factory settings via the front panel, web, or RS-232 command.
2. Power cut memory function is available except for the standby status.
3. The RS-232 and Web will be available within a few minutes after the device is powered on.
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
LCD Display Navigation
Buttons: INPUT/OUTPUT (1–8), MENU, ENTER, ▲/▼, POWER, FNC
Use to navigate on-screen menus and configure settings.
EDID Presets
#
Resolution
Audio
1
1080p60
2.0Ch
2
1080p60
5.1Ch
3
1080p60
7.1Ch
4
4K30
2.0Ch
5
4K30
5.1Ch
6
4K30
7.1Ch
7
4K60 (4:2:0)
2.0Ch
8
4K60 (4:2:0)
5.1Ch
9
4K60 (4:2:0)
7.1Ch
10
4K60 (4:4:4)
2.0Ch
11
4K60 (4:4:4)
5.1Ch
12
4K60 (4:4:4)
7.1Ch
13
4K30 HDR
2.0Ch
14
4K30 HDR
5.1Ch
15
4K30 HDR
7.1Ch
16
4K60 (4:2:0) HDR
2.0Ch
17
4K60 (4:2:0) HDR
5.1Ch
18
4K60 (4:2:0) HDR
7.1Ch
19
4K60 (4:4:4) HDR
2.0Ch
20
4K60 (4:4:4) HDR
5.1Ch
21
4K60 (4:4:4) HDR
7.1Ch
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
Custom EDID
#
Option
22–24
User Defined 1–3
25–32
Copy Output 1–8
Output Settings
Video Mode: Bypass / 4K→1080p / Auto / Audio Only
HDR Mode: Bypass / HDR→SDR / Auto
ARC / Stream / AV Mute / Audio Breakout: ON/OFF per Output (1–8)
Audio Source: Embedded Input 1–8
Audio Mode: Follow Input / Output / Matrix
Routing: Output 1–8 → Input 1–8 or ARC ON/OFF
System Settings
LCD Timeout: OFF / 15s / 30s / 60s
Baud Rates: 4800 / 9600 / 19200 / 38400 / 57600 / 115200
Network
Setting
Value
DHCP
ON / OFF
IP Address
192.168.0.100
Subnet
255.255.0.0
Gateway
192.168.0.1
Maintenance
Reboot • Factory Reset • Firmware Update
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
IR Remote
OFF / ON:
Press to power on or power off the device.
P1/P2/P3/P4/P5/P6/P7/P8:
Press to recall the corresponding saved presets.
HOME / ▲ / ▼ / ◄ / ► / OK:
Press to operate the menu on the LCD screen.
A/F Multifunction Button:
A/F + 1~8: Select input 1~8 to all outputs.
A/F + A/F + 1: Display IP address on LCD screen.
A/F + A/F + 2: Display RS-232 baud rate on LCD screen.
Video Switching
To route video signals:
1. Press OUT + output number (1–8) to select the desired output channel.
2. Then press IN + input number (1–8) to assign the input source.
Example: Press
OUT + 1, then IN + 2 — this routes video from Input 2 to Output 1.
All Outputs:
To send a single input to all outputs simultaneously:
● Press OUT + All, then press IN + [input number].
Example: Press
OUT + All, then IN + 1 — Input 1 is routed to all outputs.
Audio Switching
To route audio independently:
1. Press A/F, then follow the same steps as video switching.
2. Press OUT + [output number], then IN + [input number].
Example: Press
A/F + OUT + 1, then IN + 2 — this routes audio from Input 2 to Output 1.
IR Remote Operation
The matrix can also be controlled using the included IR remote. There are two ways to receive the IR signal:
● Direct IR Reception: Point the remote directly at the front panel IR window.
○ Maximum range: 8 meters (26 ft) when aimed directly.
○ Effective angle: ±45° up to 5 meters (16 ft).
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Alternative Method:
If the Matrix's built-in IR receiver is blocked or the unit is installed in an enclosed space out
of the remote’s line of sight, connect the external IR receiver cable to the IR EXT port.
For optimal performance:
● Maximum range is 5 meters when the remote is pointed directly at the IR receiver
head.
● Effective range reduces to 3 meters at an angle of ±45°.
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None
None
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Web GUI User Guide
The Matrix can be configured and controlled through its built-in Web GUI. Follow the steps
below to access the Web GUI:
Step 1: Obtain the Current IP Address
Default IP Address: 192.168.0.100
You can retrieve the Matrix's current IP address using one of the following methods:
Method 1 – Using the Front Panel:
1. On the LCD screen, press the MENU button to enter the main menu.
2. Use the UP/DOWN buttons to navigate to SETUP, then press ENTER.
3. Scroll to NETWORK and press ENTER again.
4. The current IP address will be displayed on screen.
5. If DHCP is available, enable DHCP to automatically obtain an IP address from your
Network.
Method 2 – Using RS-232 Control:
1. Connect a PC to the Matrix via RS-232.
2. Open an ASCII command tool and send the command:
r ipconfig!
3. The device will return network configuration details similar to the following:
IP Mode: Static
IP: 192.168.0.100
Subnet Mask: 255.255.255.0
Gateway: 192.168.0.1
TCP/IP Port: 8000
Telnet Port: 23
MAC Address: 00:1C:91:03:80:01
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Note: The actual IP address may vary depending on network configuration.
For more RS-232 commands, refer to the “RS-232 Control Command” guide.
Step 2: Connect the Matrix to Your PC
1. Use a standard Ethernet (UTP) cable to connect the Matrix's TCP/IP port to your PC.
2. Configure your PC's IP address to be in the same subnet as the Matrix (e.g.,
192.168.0.xxx).
Step 3: Access the Web GUI
1. Open a web browser on the connected PC.
2. Enter the Matrix's IP address into the address bar (e.g., http://192.168.0.100).
3. The Web GUI login page will appear:
Select the username "Admin", enter the default password "admin", and click the LOGIN
button. The Status page will appear upon successful login.
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Status Page
The Status page displays essential information about the device, including the model number, installed firmware
version, and network settings.
Video Page
① Switch:
Select the input signal source for each output port.
● You can independently assign video and audio from any input channel to an output.
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
② Presets:
Save, recall, or clear preset configurations.
● Up to 8 presets can be saved.
● Each preset stores the current mapping between outputs and assigned inputs.
● Example: Preset 1 saves the mapping of Output 1 to a selected input channel.
● Use these controls:
○ Save/Overwrite: Save the current configuration to a preset.
○ Clear: Remove a saved preset.
○ Recall: Apply a saved preset instantly.
● Preset names are customizable.
Matrix Page
On the Matrix page, you can:
● Select an Output channel (1–8).
● Assign an Input source (1–8) to that output.
Display names for each Input and Output can be edited on their respective pages.
Note:
● Video and audio routing are independent. Example: Assign video from Input 7 and
audio from Input 2 to Output 2.
● The P2P (Point-to-Point) button resets all connections to match one-to-one: Output 1
to Input 1, Output 2 to Input 2, etc.
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Input Page
You can perform the following actions:
1. Input: Displays the input channels.
2. Active: Indicates signal status:
○ Green: Connected to a signal source.
○ Yellow: No signal detected.
3. Name: Rename the input channel (max 32 characters).
4. EDID: Shows the current EDID. Select a different EDID from the drop-down menu.
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5. Load EDID to User Memory:
○ Click Browse to select a .bin EDID file.
○ Choose User Define1/2/3, and click Upload.
○ If an incorrect file is selected, an error message will prompt you to recheck the file.
6. Download EDID:
○ Select the input channel.
○ Click Download to save the EDID file to your computer.
Output Page
The Output page allows you to:
1. Outputs: Displays output channels.
○ All Output: Apply settings to all outputs at once via the drop-down menu.
2. Cable: Shows connection status of each output:
○ Green: Connected to a display.
○ Yellow: No connection.
3. Name: Rename the output channel (max 32 characters).
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4. Mode: Configure video resolution scaling. Options:
○ Bypass (Default): Matches the input source.
○ 4K → 1080p: Downscale 4K to 1080p.
○ Auto (Follow Sink): Matches the display’s EDID.
○ Audio Only: Outputs only audio.
5. HDR Conversion: Configure HDR to SDR conversion. Options:
○ Bypass: Matches the input source.
○ HDR to SDR: Converts HDR signals to SDR.
○ Auto (Follow Sink): Follows the display’s EDID.
6. HDCP: Configure HDCP compliance. Options:
○ Signal Management: Reserved.
○ HDCP 1.4: Force HDCP 1.4.
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○ HDCP 2.2: Force HDCP 2.2.
○ Auto (Follow Sink): Matches the display’s HDCP version.
○ Follow Source: Matches the input source’s HDCP version.
7. ARC: Enable/disable the Audio Return Channel (ARC).
8. Stream: Enable/disable the output stream.
Ext-Audio Page
Select the audio routing mode and adjust volume or mute channels:
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● Bind to Input: Audio follows the input source (1:1 mapping).
○ HDMI input sources and ARC outputs are fixed in this mode.
● Bind to Output: Audio follows the assigned HDMI outputs.
○ HDMI inputs and outputs are preassigned.
● Audio Matrix: Freely assign audio outputs from any input source or ARC.
○ Select an audio output, then choose an input source or ARC for routing.
CEC Page
Manage CEC (Consumer Electronics Control) for inputs and outputs.
● Input Control: Select an input source and control actions like power on/off, return, switch, pause, fast
forward, rewind, mute, etc.
● Output Control: Select an output and control the connected display (power on/off, volume
adjustments, active source switching, etc.).
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
Network Page
1. Modify Network Settings:
○ Adjust IP Mode, IP Address, Gateway, Subnet Mask, and Telnet Port.
○ In Static mode, settings can be entered manually.
○ In DHCP mode, the device automatically receives an IP address from the router.
2. Change User Password:
○ Click User, enter the Old Password, New Password, and Confirm Password, then click
Save.
○ Password requirements:
■ Cannot be empty.
■ New Password must differ from the Old Password.
■ New Password and Confirm Password must match.
3. Reset to Default Network Settings:
○ Click Set Network Defaults, then confirm with OK.
○ The device will reboot and return to the default IP settings.
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System Page
Perform system-level operations:
1. Panel Lock: Enable/disable the front panel buttons.
2. Beep: Turn the audible beep on or off.
3. LCD: Set the LCD to always on, or turn it off after 15s, 30s, or 60s.
4. Serial Baud Rate: Adjust the serial port baud rate.
5. Firmware Update: Click Browse to select a firmware file, then click Update.
6. Factory Reset: Restore factory default settings.
7. Reboot: Reboot the device.
Note: After a reset or reboot, the unit will return to the login page.
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BZBGEAR BG-4K-88MA PRODUCT MANUAL
RS-232 Control Command
This product supports RS-232 control for remote operation. To use this feature, connect the Matrix’s RS-232
control port to a PC using an RS-232 serial cable. Launch a serial command tool on the PC and send ASCII
commands to control the Matrix. A complete list of supported ASCII commands is provided below:
ASCII Command
Serial port protocol. Baud rate: 115200, Data bits: 8, Stop bits:1, Check bit: 0
TCP/IP protocol port: 8000
Telnet port:23
x,y,z, XXX are parameters
Error Code describe: E00 -> unkown command E01 -> parameter out of range
E02 -> get the error EDID data
Command
Code
Function
Description
Example
Feedback
Default
System Setting
help!
List all
commands
help!
status!
Get the device's
current
status
status!
Please refer to the note
at the end of the list.
r type!
Get device
model
r type!
8x8 HDMI 2.0 Matrix
r fw version!
Get Firmware
version
r fw
version!
BOOT: V1.00.01
MCU: V1.00.01
WEB: V1.00.01
SUB1: V1.00.01
SUB2: V1.00.01
SUB3: V1.00.01
SUB4: V1.00.01
SUB5: V1.00.01
FPGA: V1.00.01
power z!
Power on/off the
device, z=0~1
(z=0 power off,
z=1 power on)
power 1!
Power: on
System initializing...
Initialization finished!
BOOT: V1.00.01
MCU: V1.00.01
WEB: V1.00.01
r power!
Get current
power state
r power!
Power: on
s beep z!
Enable/Disabl
e buzzer
function,
z=0~1 (z=0
beep off, z=1
beep on)
s beep 1!
Beep: on
beep off
r beep!
Get buzzer state
r beep!
Beep: on
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 26
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command Code
Function Description
Example
Feedback
Default
System Setting
s lock z!
Lock/Unlock front panel
button, z=0~1 (z=0 lock off,
z=1 lock on)
s lock 1!
Button lock: on
Lock off
r lock!
Get panel button lock state
r lock!
Button lock: on
s ir z!
Set IR on/off, z=0~1(z=0 IR
Off, z=1 IR On)
s ir 1!
IR: on
IR on
r ir!
Get IR on/off state
r ir!
IR: on
s lcd on time z!
Set LCD screen remain
on time, z=0~4 (0:Off
1:Always,2:15s,3:30s,4:60s)
s lcd on
time 3!
Lcd remain time: 30s
30
seconds
r lcd mode!
Get the backlight status of lcd
screen
r lcd mode!
Lcd remain time: 30s
s baud x!
Set RS-232 baud rate to x bps
x=1: 4800
x=2: 9600
x=3: 19200
x=4: 38400
x=5: 57600
x=6: 115200
s baud 6!
Baud rate:
115200
115200
r baud!
Get RS-232 baud rate
r baud!
Baud rate:
115200
reboot!
Reboot the device
reboot!
Reboot…
8x8 HDMI 2.0
matrix System
initializing...
Initialization
finished!
BOOT: V1.00.01
MCU: V1.00.01 WEB:
V1.00.01
reset!
Reset to factory defaults
reset!
Reset to factory
defaults
8x8 HDMI 2.0
Matrix System
initializing...
Initialization
finished!
BOOT V1.0.0
MCU V1.0.0
WEB V1.0.0
r link in x!
Get the connection status of
the x input port, x=0~8(0=All)
r link in 1!
HDMI input 1:
connect/sync/
disconnect
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 27
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command Code
Function Description
Example
Feedback
Default
System Setting
r link out y!
Get the connection status of
the y output port, y=0~8
(0=All)
r link out 1!
HDMI output
1: connect/
disconnect
s save preset z!
Save switch state between all
output port and the input port to
preset z, z=1~8
Only video and audio
switching state
s save
preset 1!
Preset 1: save
s recall preset
z!
Recall saved preset z
scenarios, z=1~8 Only
video and audio
switching state
s recall
preset 1!
Preset 1: recall
s clear preset
z!
Clear stored preset z
scenarios, z=1~8 Only
video and audio
switching state
s clear
preset 1!
Preset 1: clear
r preset z!
Get preset z information, z=1~8
Only video and audio
switching state
r preset 1!
Video/audio
crosspoint
s fan x speed y!
Set fan x speed y (x=0~2, 0=All,
y=0~4)
x=0: All Fans, x=1: Fan 1, x=2:
Fan 2
y=0: Auto y=1: 25% y=2: 50%
y=3: 75% y=4: 100%
s fan 0
speed 0!
Fan 1 speed:
auto
Fan 2 speed:
auto
0
r fan x speed!
Get fan x speed (x=0~2, 0=All)
x=0: All Fans, x=1: Fan 1, x=2:
Fan 2
r fan 0
speed!
Fan 1 speed:
auto
Fan 2 speed:
auto
r temp!
Get device internal
temperature
r temp!
65C
r uptime!
Get device running time
(Day:Hour:Min:Sec)
r uptime!
000:00:13:04
Output Setting
s output y in
source x!
Route input x source to
output y (y=0~8, 0=All,
x=1~8)
x=1~8: Input 1 ~ Input 8
y=0: All Outputs
y=1~8: Output 1 ~ Output 8
s output 1
in source
1!
Output 1: input 1
Command
Code
Function
Description
Example
Feedback
Default
Output Setting
r output y in
source!
Get output y
selected input
source
(y=0~8,0=All)
y=0: All Outputs
y=1~8: Output
1~Output 8
r output 1 in
source!
Output 1: input 1
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 28
BZBGEAR BG-4K-88MA PRODUCT MANUAL
s output y in
audio x!
Route audio x
to output y
(y=0~8, 0=All,
x=0~8) x=0:
Current Stream
Embedded
(Default) x=1~8:
Input 1 ~ Input
8 Stream
y=0: All Outputs
y=1~8: Output
1~Output 8
s output 0
in audio 2!
Output 1 audio: input 2
Output 2 audio: input 2
Output 3 audio: input 2
Output 4 audio: input 2
Output 5 audio: input 2
Output 6 audio: input 2
Output 7 audio: input 2
Output 8 audio: input 2
Current stream
embedded
r output y in
audio!
Get output y
selected audio
source
(y=0~8,0=All)
y=0: All Outputs
y=1~8: Output
1~Output 8
r output 0
in source!
Output 1 audio: input 2
Output 2 audio: input 2
Output 3 audio: input 2
Output 4 audio: input 2
Output 5 audio: input 2
Output 6 audio: input 2
Output 7 audio: input 2
Output 8 audio: input 2
s output y hdcp
x!
set output hdcp
(y=0~8, x=0~4)
y=0: All Outputs
y=1~8: Output
1~Output 8 x=0:
Signal
Management
x=1: HDCP 1.4
x=2: HDCP 2.2
x=3: Auto (Follow
Sink) x=4: Follow
Source
s output 1
HDCP 2!
Output 1 HDCP: HDCP
2.2
Follow sink
r output y hdcp!
Get output y
hdcp status
(y=0~8,0=All)
y=0: All Outputs
y=1~8: Output
1~Output 8
r output 1
hdcp!
Output 1 HDCP: HDCP
2.2
s output y
stream x!
set output y
stream
enable/disable
(y=0~8, 0=All,
x=0~1)
y=0: All Outputs
y=1~8: Output
1~Output 8 x=0:
Stream Disable
x=1: Stream
Enable
s output 1
stream 1!
Output 1 stream:
enable
Enable
r output y
stream!
Get output y
stream status
(y=0~8, 0=All)
y=0: All
Outputs
y=1~8: Output
1~Output 8
r output 1
stream!
Output 1 stream:
enable
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 29
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command
Code
Function Description
Example
Feedback
Default
Output Setting
s output y video
mode x!
Set output y port video mode
(y=0~8, 0=All, x=1~4)
y=0: All Outputs
y=1~8: Output 1~Output 8
x=1: Bypass
x=2: 4K to 1080P
x=3: Auto(Follow Sink)
x=4: Audio Only
s output
1 video
mode 2!
Output 1 video mode: 4K
to 1080P
Bypass
r output y video
mode!
Get output y port video
mode (y=0~8,0=All) y=0:
All Outputs
y=1~8: Output 1~Output 8
r output
1 video
mode!
Output 1 video mode: 4K
to 1080P
s output y
avmute x!
Set output y avmute on/off
(y=0~8, 0=All, x=0~1) y=0:
All Outputs
y=1~8: Output 1~Output 8
x=0: Off
x=1: On
s output 1
avmute 1!
Output 1 avmute: on
Off
r output y
avmute!
Get output y avmute
status (y=0~8,0=All)
y=0: All Outputs
y=1~8: Output 1~Output 8
r output 1
avmute!
Output 1 avmute: on
s output y hdr x!
Set output y port HDR to
SDR mode (y=0~8, 0=All,
x=1~3)
y=0: All Outputs
y=1~8: Output 1~Output 8
x=1: Bypass
x=2: HDR to SDR
x=3: Auto(Follow Sink)
s output 1
hdr 2!
Output 1 HDR mode:
HDR to SDR
Bypass
r output y hdr!
Get output y port HDR to
SDR mode (y=0~8,0=All)
y=0: All Outputs
y=1~8: Output 1~Output 8
r output 1
hdr!
Output 1 HDR mode:
HDR to SDR
s output y arc x!
Set output y ARC on/off
(y=0~8, 0=All, x=0~1) y=0:
All Outputs
y=1~8: Output 1~Output 8
x=0: Off
x=1: On
s output 1
arc 0!
Output 1 arc: off
Off
r output y arc!
Get output y ARC status
(y=0~8,0=All)
y=0: All Outputs
y=1~8: Output 1~Output 8
r output 1
arc!
Output 1 arc: off
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 30
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command
Code
Function Description
Example
Feedback
Default
EDID Setting
s input x EDID
z!
Set HDMI input x EDID mode (x=0~8,
z=1~32)
x=0: All Inputs
x=1~8: Input 1 ~ Input 8 z=1: 1080P60
2.0CH z=2: 1080P60 5.1CH z=3:
1080P60 7.1CH z=4: 4K30 2.0CH
z=5: 4K30 5.1CH z=6: 4K30
7.1CH
z=7: 4K60(420) 2.0CH z=8: 4K60(420)
5.1CH z=9: 4K60(420) 7.1CH z=10:
4K60(444) 2.0CH z=11: 4K60(444)
5.1CH z=12: 4K60(444) 7.1CH z=13:
4K30_HDR 2.0CH z=14: 4K30_HDR
5.1CH z=15: 4K30_HDR 7.1CH
z=16: 4K60(420)_HDR 2.0CH z=17:
4K60(420)_HDR 5.1CH z=18:
4K60(420)_HDR 7.1CH z=19:
4K60(444)_HDR 2.0CH z=20:
4K60(444)_HDR 5.1CH z=21:
4K60(444)_HDR 7.1CH
z=22: User Defined 1 z=23: User
Defined 2 z=24: User Defined 3
z=25: Copy Output 1 z=26: Copy
Output 2 z=27: Copy Output 3
z=28: Copy Output 4 z=29: Copy
Output 5 z=30: Copy Output 6
z=31: Copy Output 7
z=32: Copy Output 8
s input 1
EDID 10!
Input 1
EDID:
4K60(444)
2.0CH
4K60(4
44)
2.0CH
r input x EDID!
Get input x EDID mode(x=0~8,0=All)
x=0: All Inputs
x=1~8: Input 1 ~ Input 8
r input 1
EDID!
Input 1
EDID:
4K60(444)
2.0CH
s user x edid 00
FF FF …!
Set user x EDID data (x=1~3) x=1: User
Defined 1
x=2: User Defined 2 x=3: User Defined
3
s user 1
edid 00 FF
FF FF FF
…!
User 1 EDID
data:
00 FF FF
FF FF FF
FF 00
………
r user x edid!
Get user x EDID data (x=1~3) x=1: User
Defined 1
x=2: User Defined 2 x=3: User Defined
3
r user 1
edid!
User 1 EDID
data:
00 FF FF
FF FF FF
FF 00
………
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 31
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command Code
Function Description
Example
Feedback
Default
Ext-audio Setting
s output
exa mode
x!
Set ext-audio mode
(x=0~2)
x=0: Follow
Input x=1:
Follow Output
x=2: Matrix Mode
s output exa mode
0!
Ext-audio mode:
follow input
Follow input
r output
exa
mode!
Get output ext-audio
mode
r output
exa mode!
Ext-audio mode:
follow input
s output y exa
in source x!
Route input source
audio to ext-audio
(y=0~8, 0=All,
x=1~16)
y=0: All Ext-audio
Outputs
y=1~8: Ext-audio
1 ~ Ext-audio 8
x=1~8: Input 1 ~
Input 8 x=9~16:
Output 1 ARC ~
Output 8 ARC
s output
1 exa in
source 1!
Ext-audio 1: input 1
Ext-audio 1
-> input1
r output y exa
in source!
Get output y ext-
audio selected
input
source(y=0~8,
0=All) y=0: All
Ext-audio
Outputs
y=1~8: Ext-audio
1 ~ Ext-audio 8
r output 0 exa in
source!
Ext-audio 1: input 1
Ext-audio 2 :input 2
Ext-audio 3: input 3
Ext-audio 4: input 4
Ext-audio 5: input 5
Ext-audio 6: input 6
Ext-audio 7: input 7
Ext-audio 8: input 8
s output y
exa analog
gain x!
Set output y
ext-audio analog
gain x db (y=0~8,
0=All, x=-56~+12dB)
y=0: All Ext-audio
Analog
Outputs
y=1~8: Ext-audio
Analog 1 ~
Ext-audio Analog 8
x=[-56…+12]dB:
1dB
Step
s output 0 exa
analog gain 0!
Ext-audio analog 1
gain: 0dB
Ext-audio analog 2
gain: 0dB
Ext-audio analog 3
gain: 0dB
Ext-audio analog 4
gain: 0dB
Ext-audio analog 5
gain: 0dB
Ext-audio analog 6
gain: 0dB
Ext-audio analog 7
gain: 0dB
Ext-audio analog 8
gain: 0dB
0dB
r output y
exa analog
gain!
Get output y
ext-audio analog
gain (y=0~8, 0=All)
y=0: All Ext-audio
Analog
Outputs
y=1~8: Ext-audio
Analog 1 ~
Ext-audio Analog 8
r output 1 exa
analog gain!
Ext-audio analog 1
gain: 0dB
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 32
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command Code
Function Description
Example
Feedback
Default
Ext-audio Setting
s output y
exa mute x!
Set output y ext-audio mute
on/off (y=0~8, 0=All, x=0~1)
y=0: All Ext-audio Outputs
y=1~8: Ext-audio 1 ~ Ext-
audio 8
x=0: Off
x=1: On
s output 0
exa mute
1!
Ext-audio 1 mute: on
Ext-audio 2 mute: on
Ext-audio 3 mute: on
……
Ext-audio 8 mute: on
Off
r output y
exa mute!
Get output y ext-audio mute
on/off state (y=0~8, 0=All)
y=0: All Ext-audio Outputs
y=1~8: Ext-audio 1 ~ Ext-
audio 8
r output 1
exa mute!
Ext-audio 1 mute:
on
CEC Setting
s cec in x on!
Set input x power on by
CEC, x=0~8 (0=all input)
s cec in
1 on!
HDMI input 1 CEC:
power on
s cec in x off!
Set input x power off by
CEC, x=0~8 (0=all input)
s cec in
1 off!
HDMI input 1 CEC:
powe off
s cec in x menu!
Set input x open menu by
CEC, x=0~8 (0=all input)
s cec in
1
menu!
HDMI input 1 CEC:
open menu
s cec in x back!
Set input x back operation
by CEC, x=0~8 (0=all input)
s cec in
1 back!
HDMI input 1 CEC:
back operation
s cec in x up!
Set input x menu up
operation by CEC, x=0~8
(0=all input)
s cec in
1 up!
HDMI input 1 CEC:
menu up operation
s cec in x down!
Set input x menu down
operation by CEC, x=0~8
(0=all input)
s cec in
1
down!
HDMI input 1 CEC:
menu down
operation
s cec in x left!
Set input x menu left
operation by CEC, x=0~8
(0=all input)
s cec in
1 left!
HDMI input 1 CEC:
menu left operation
s cec in x right!
Set input x menu right
operation by CEC, x=0~8
(0=all input)
s cec in
1 right!
HDMI input 1 CEC:
menu right operation
s cec in x enter!
Set input x menu enter by
CEC, x=0~8 (0=all input)
s cec in
1 enter!
HDMI input 1 CEC:
menu enter operation
s cec in x play!
Set input x play by CEC,
x=0~8 (0=all input)
s cec in
1 play!
HDMI input 1 CEC:
play operation
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 33
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command Code
Function Description
Example
Feedback
Default
CEC Setting
s cec in x pause!
Set input x pause by CEC,
x=0~8 (0=all input)
s cec in
1
pause!
HDMI input 1 CEC:
pause operation
s cec in x stop!
Set input x stop by CEC,
x=0~8 (0=all input)
s cec in
1 stop!
HDMI input 1 CEC:
stop operation
s cec in x rew!
Set input x rewind by CEC,
x=0~8 (0=all input)
s cec in
1 rew!
HDMI input 1 CEC:
rewind operation
s cec in x mute!
Set input x volume mute by CEC,
x=0~8 (0=all input)
s cec in
1 mute!
HDMI input 1 CEC:
volume mute
s cec in x vol-!
Set input x volume down by CEC,
x=0~8 (0=all input)
s cec in
1 vol-!
HDMI input 1 CEC:
volume down
s cec in x vol+!
Set input x volume up by CEC,
x=0~8 (0=all input)
s cec in
1 vol+!
HDMI input 1 CEC:
volume up
s cec in x ff!
Set input x fast forward by CEC,
x=0~8 (0=all input)
s cec in 1
ff!
HDMI input 1 CEC:
fast forward
operation
s cec in x
previous!
Set input x previous by CEC,
x=0~8 (0=all input)
s cec in
1
previou
s!
HDMI input 1 CEC:
previous operation
s cec in x next!
Set input x next by CEC,
x=0~8 (0=all input)
s cec in
1 next!
HDMI input 1 CEC:
next operation
s cec hdmi out y
on!
Set hdmi output y power on by
CEC, y=0~8 (0=all hdmi output)
s cec
hdmi out
1 on!
HDMI output 1
CEC: power on
s cec hdmi out y
off!
Set hdmi output y power off by
CEC, y=0~8 (0=all hdmi output)
s cec
hdmi out
1 off!
HDMI output 1
CEC: power off
s cec hdmi out y
mute!
Set hdmi output y volume mute
by CEC, y=0~8 (0=all hdmi
output)
s cec hdmi
out 1
mute!
HDMI output 1 CEC:
volume mute
s cec hdmi out y
vol-!
Set hdmi output y volume down
by CEC, y=0~8 (0=all hdmi
output)
s cec
hdmi out
1 vol-!
HDMI output 1 CEC:
volume down
s cec hdmi out y
vol+!
Set hdmi output y volume up by
CEC, y=0~8 (0=all hdmi output)
s cec
hdmi out
1 vol+!
HDMI output 1 CEC:
volume up
s cec hdmi out y
active!
Set hdmi output y active source
by CEC, y=0~8 (0=all hdmi
output)
s cec hdmi
out 1
active!
HDMI output 1 CEC:
active source
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 34
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command
Code
Function
Description
Example
Feedback
Default
Network Setting
r ipconfig!
Get the Current
IP Configuration
r ipconfig!
IP mode: DHCP
IP address: 192.168.62.106
Subnet mask: 255.255.255.0
Gateway: 192.168.62.1
TCP/IP port: 8000
Telnet port: 23 MAC
address:
6C:DF:FB:0C:B3:8E (Static:
169.254.100.200
255.255.0.0 169.254.100.1)
- Only display in DHCP mode
r mac addr!
Get network MAC
address
r mac addr!
Mac address: 00:1C:91:03:80:01
s ip mode z!
Set network IP
mode to static IP
or DHCP, z=0~1
(z=0 Static, z=1
DHCP)
s ip mode 0!
Set IP mode: Static. (Please use
"s net reboot!"
command or repower device to
apply new config!)
r ip mode!
Get network IP
mode
r ip mode!
IP mode: Static
s ip addr xxx.xxx.
xxx.xxx!
Set network
IP address
s ip addr
192.168.0.100!
Set IP address: 192.168.0.100
(Please use "s net reboot!"
command to apply new config!)
DHCP on, Device can't config static
address, set DHCP off first.
r ip addr!
Get network IP
address
r ip addr!
IP address: 192.168.0.100
s subnet xxx.xxx.
xxx.xxx!
Set network
subnet
mask
s subnet
255.255.255.0!
Set subnet Mask: 255.255.255.0
(Please use "s net reboot!"
command to apply new config!)
DHCP on, Device can't config
subnet mask, set DHCP off first.
r subnet!
Get network
subnet mask
r subnet!
Subnet Mask: 255.255.255.0
s gateway xxx.
xxx.xxx.xxx!
Set network
gateway
s gateway
192.168.0.1!
Set gateway: 192.168.0.1 (Please
use "s net reboot!" command to
apply new config!) DHCP on,
Device can't config gateway, set
DHCP off first.
r gateway!
Get network
gateway
r gateway!
Gateway:192.168.0.1
s tcp/ip port x!
Set network
TCP/IP port
(x=1~65535)
s tcp/ip port
8000!
Set TCP/IP port:8000
r tcp/ip port!
Get network
TCP/IP
port
r tcp/ip port!
TCP/IP port:8000
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 35
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Command
Code
Function
Description
Example
Feedback
Default
Network Setting
s telnet port x!
Set network
telnet port
(x=1~65535)
s telnet port
23!
Set Telnet port:23
r telnet port!
Get network
telnet port
r telnet port!
Telnet port:23
s net reboot!
Reboot network
modules
s network
reboot!
Network reboot…
Search for IP,please wait ...! IP
mode: DHCP
IP address: 192.168.62.106
Subnet mask: 255.255.255.0
Gateway: 192.168.62.1
TCP/IP port: 8000
Telnet port: 23
MAC address:
6C:DF:FB:0C:B3:8E (Static:
169.254.100.200
255.255.0.0 169.254.100.1)
- Only display in DHCP mode
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 36
BZBGEAR BG-4K-88MA PRODUCT MANUAL
Connection Diagram
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 37
BZBGEAR BG-4K-88MA 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).
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 38
BZBGEAR BG-4K-88MA 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.
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 39
BZBGEAR BG-4K-88MA 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.
Address: 830 National Drive #140, Sacramento, CA 95834, USA · Tel: +1(888)499-9906 · Email: support@bzbgear.com 40
