BZB Gear BG-4K120CHA User manual

BG-4K120CHA
USB-C 4K120 Video Capture Box with Scaler, HDMI 2.1 Loopout,
Audio & HDR10 to SDR Conversion
User Manual

BZBGEAR BG-4K120CHA PRODUCT MANUAL
Address: 830 National Drive #140, Sacramento, CA 95834, USA ·Tel: [phone] ·Email: [e-mail] 2

BZBGEAR BG-4K120CHA PRODUCT MANUAL
TABLE OF CONTENTS
Statement 4
Safety Precaution 4
Introduction 5
Features 5
Packing List 6
Specifications 7
Operation Controls and Functions 8
Connection Diagram 9
Video Streaming 10
Troubleshooting 19
USB Pin Definition 19
Tech Support 20
Warranty 20
Mission Statement 20
Copyright 20
Address: 830 National Drive #140, Sacramento, CA 95834, USA ·Tel: [phone] ·Email: [e-mail] 3

BZBGEAR BG-4K120CHA 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: [phone] ·Email: [e-mail] 4

BZBGEAR BG-4K120CHA PRODUCT MANUAL
Introduction
The BG-4K120CHA is a cutting-edge USB-C 4K120 video capture device with a
scaler, HDMI 2.1 loopout, audio, and HDR10 to SDR conversion, designed for professional
HDMI video signal capturing. It utilizes a USB 3.1 Type-C Gen 1 (USB 3.0) interface for
high-speed transmission. Additionally, the HDMI input and loopout can support up to 4K2K
120Hz, enabling users to connect to a 4K2K 120Hz source and capture Ultra HD (4K2K@30)
video. The BG-4K120CHA also captures and displays original uncompressed HDMI video,
resulting in more realistic color rendition.
Moreover, the BG-4K120CHA incorporates large volume image buffer technology to
effectively avoid video tearing, and the high sampling rate and accuracy ensure images with
high sharpness, rich details, and fewer color edges. Furthermore, with HDR10 to SDR
conversion, PS5/Xbox Players can enjoy 4K2K@120 HDR games on a 4K TV while
recording real-time 4K2K@30/1080P@120 video streams with SDR quality through USB 3.0
simultaneously.
With its advanced features and high-end capabilities, the BG-4K120CHA is an ideal
choice for demanding HDMI video capture applications, offering professional-grade
performance and versatility.
* PS5 & Xbox Series X also support 1080P120
Features
●HDMI video and audio streams over USB 3.1 Type-C Gen 1
●UVC1.0/1.1/1.5
●Video resolution up to 4K2K@30/1080P@120 (Video stream over USB-C)
●HDMI 2.1 compliant
●HDMI input & output up to 4K2K 120Hz 4:4:4/4:2:2/4:2:0
●HDR 4K2K@60 4:2:0 10 bits/12 bits
●HDCP 2.3 and 1.4 compliant
●Allows any output to view any HDMI source at any time
●Deinterlace & scaling (upscaling supports up to 1080P@120)
●Mic-in mix with HDMI audio
●HDMI audio extraction
●HDR10 to SDR conversion***
●Play 4K@120 HDR on HDMI out while streaming 4K2K@30/1080P@120 with SDR
colors for gameplay capture.
●Volume control knob to adjust the MIC/Headphone volume.
●Auto-detection on video format to ensure plug-play operations
●Supported operating systems: Windows 7/8.1/10/11, Mac, & Linux OS
●Compatible with most 3rd party software such as OBS Studio and AMCap
●USB 3.1 Gen 1 (RGB/YUY2/NV12/P010) 4 (capture up to 4K2K@30) and USB 2.0
(YUY2/NV12) (capture up to 1080@15)
●Low Latency (3~4ms at 1080P)
Note: Please use the included USB 3.0 cable in the box to protect the device and avoid
further compatible issues. Video resolution changes may require users to restart software.
Does NOT support HDR10 plus, HLG, and Dolby Vision to SDR conversion
Address: 830 National Drive #140, Sacramento, CA 95834, USA ·Tel: [phone] ·Email: [e-mail] 5

BZBGEAR BG-4K120CHA PRODUCT MANUAL
Packing List
●1x BG-4K120CHA
●1x 5V power adapter
●1x USB 3.0 A to C Cable (host to device)
●1x User Manual
Specifications
Model Name
BG-4K120CHA
Technical
Role of usage
Video Capture Device
Input Video bandwidth
Up to FRL 5 (40G)
Output bandwidth(USB-C)
Up to 5 Gbps (USB-C)
Output bandwidth(HDMI)
Up to FRL 5 (40G)
Video support(USB-C)
Up to 4K2K@30/1080P@120
Video support(HDMI)
Up to 4K2K 120Hz 4:4:4/4:2:2/4:2:0
Audio Input
HDMI Embedded Audio & Stereo audio Input
Audio Support
HDMI output up to 7.1ch, TOSLINK up to 5.1ch, Stereo audio up to 2ch
Recording Mode
Software Compression
Recording Video Format
RGB/YUY2/NV12/P010 (USB3.1 Gen 1), YUY2/NV12 (USB2.0)
ESD protection
Human body model — ±15kV [air-gap discharge] & ±8kV [contact discharge]
PCB stack-up
4-layer board [impedance control — differential 100Ω; single 50Ω]
Firmware update
Feasible via USB-C Port
Input
1x HDMI+ 1x 3.5mm
Output
1x USB-C + 1x HDMI + 1x 3.5mm + 1x TOSLINK
HDMI connector
Type A [19-pin female]
USB connector
USB 3.1 Type-C (SuperSpeed USB)
Software compatibility
(not complete list)
OBS Studio (Windows, Linux, MAC), AMCap (Windows), Potplayer (Windows)¸
VLC (OS X, Linux), XSplit Broadcaster (Windows), Skype (Windows, OS X),
Zoom (Windows), Hangout (Windows), TeamViewer (Windows)
OS Support
Windows 7 /8.1 /10/11, Mac and Linux OS
Mechanical
Housing
Metal enclosure
Dimensions
[L x W x H]
Model
177 x 81 x 22mm [7" x 3.2" x 0.9"]
Package
198 x 137 x 74mm [7.8" x 5.4" x 2.9"]
Carton
420 x 400 x 300mm [1'4"x 1'3" x 11.8"]
Weight
Model
165g[5.8 oz]
Package
445g[1 lbs]
Power supply
Via USB-C
Power consumption
4.5 Watts [max]
Operation temperature
0~40°C [32~104°F]
Storage temperature
-20~60°C [-4~140°F]
Relative humidity
20~90% RH [no condensation]
Address: 830 National Drive #140, Sacramento, CA 95834, USA ·Tel: [phone] ·Email: [e-mail] 6

BZBGEAR BG-4K120CHA PRODUCT MANUAL
Operation Controls and Functions
Front and Rear Panel
No.
Name
Function Description
1
STEREO AUDIO OUT
Audio extracts from HDMI input
2
STEREO AUDIO IN
Connect to analog stereo audio source
3
S/PDIF OUT
Audio extracts from HDMI input
4
RESET BUTTON
Reset the device
5
STEREO AUDIO OUT VOLUME KNOB
To adjust the stereo audio out sound level
6
STEREO AUDIO IN VOLUME KNOB
To adjust the stereo audio in sound level
7
LED INDICATOR
Power & input signal indicator LED
[Blue] Device power on (no input signal)
[Green] Input detects HDMI signal
[Red]1 Input source is HDCP protected
8
POWER JACK
Connect to the +5V DC power supply unit
9
USB-C OUT
Connect to a USB host (PC, NB, MAC…)
10
LED INDICATOR
USB-C indicator LED
[Red] 2 Connect the device to the USB 2.0 port on the host
[Green] Connect the device to the USB 3.0 port on the host
11
HDMI OUT
Connect to a HDMI display
12
HDMI IN
Connect to a HDMI source
1. When the input source is HDCP protected, LED will become red to indicate the
content is legally encrypted and can NOT be captured.
2. If you plug the capture device into the USB 3.0 port on the host, but the LED
indicator lights up red, it means that the device is working according to the USB 2.0
specification. It could be an issue with the USB cable or USB Port.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
Connection Diagram
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
Video Streaming
Create a Video Streaming
Users can create video streams on their streaming service platform. The steps below show
how to complete video streaming settings from Twitch and YouTube.
Twitch
1. Browse to the Twitch website (https://www.twitch.tv/) and log in. Next, select "Creator
Dashboard" from your account drop-down menu at the top right of the screen.
2. Find "Preferences" in the left menu, and click "Channel", then you will see "Primary
Steam key" on the screen. Copy the "Primary Steam key" and paste it into the
"Stream Key" field in the OBS, then click "Start Streaming" in the software.
* Please refer to steps 4-6 of the OBS software control program.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
3. Go back to Twitch and select "Channel" from your account drop-down menu.
At this point, you will see the players live stream..
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
YouTube
1. Browse to the YouTube website (https://www.youtube.com/) and log in. Next, click "Go
live" from the "Create" icon menu at the top right of the screen.
* If you are using YouTube for the first time to create a video stream, you need to wait 24
hours to enable the function.
2. Click "Stream" in the left menu, and fill in the relevant information for the live video to
create a new stream.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
3. You will see the "Stream key" from the “STREAM SETTINGS” below. Copy the
"Stream key" and paste it into the "Stream Key" field in the OBS, then click "Start
Streaming" in the software.
* Please refer to steps 4-6 of the OBS software control program.
4. Next, go back to YouTube, and then wait for 30-60 seconds, the player will display the
live preview. At the same time, the "GO LIVE" button at the top right will turn blue,
please press this button.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
5. The player on YouTube will start live streaming.
Stream and record videos with OBS
OBS is a popular USB capture freeware and has excellent compatibility. Please start with
OBS if users are not familiar with USB capture devices.
Download the software
Browse to the download page of the OBS official website
(https://obsproject.com/download), then select the suitable computer operating system and
start downloading.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
Start the software control program
After downloading the software, please open it and follow the below steps to complete the
video streaming settings.
1. First, find the "Scenes" window, click "+" in the lower left corner, and then enter the
name of the scene to create a new scene.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
2. Find the "Source" window, click "+" in the lower left corner, and then select "Display
Capture" or "Video Capture Device" to create a new source.
3. Next, you can set display capture properties. If you select "Display Capture" in step 2,
you can select the primary monitor or other extended monitor as the display source. If
you select "Video Capture Device" in step 2, you can select a USB video device as the
display source. After all settings are completed, click “OK”.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
4. Click "Settings" and then select "Stream" to perform streaming settings. Users can
choose service providers, including Twitch, YouTube, etc.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
5. Paste the stream key provided by the service provider into the "Stream Key" field, then
click "Apply" and "OK" after setting. In addition, users can click "Get Stream Key" at
this step to open the service provider website.
6. Please click "Start Streaming". At this time, the screen after clicking "Start
Streaming" will be displayed in the live video.
7. On the other hand, users can also click "Start Recording" to record videos with OBS.
Besides, you can click "Settings" and then select "Output" to set “Recording Path”
and “Recording Format”.
The procedures the manual demonstrates are based on the interface that each website
provides at the time when the manual is written. Please note that the above procedures are
subject to change due to platform updates.
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BZBGEAR BG-4K120CHA PRODUCT MANUAL
Troubleshooting
Our USB device has done comprehensive tests before shipment. Most of the
incompatibilities we have experienced are not from the USB capture device itself, but from
the sophisticated software and hardware combination of PC or laptop. Please follow the
following suggestions to see any help.
1. OBS is a popular USB capture freeware and has excellent compatibility. Please
download it and start with OBS if users are not familiar with USB capture devices.
https://obsproject.com/download
2. Due to the complexities of OS and computer hardware, different USB ports on PC or
laptop may have different performance or limitations. Please try all USB ports to see
if there are any differences.
3. Please use the USB cable in the box. We do not guarantee the overall performance
when the USB capture box works with some other USB cables.
4. HDMI/SDI cable quality may also play an essential role when capturing. Please be
sure that HDMI/SDI cable can do 4K2K@60 HDMI/SDI signal transmission or better.
Try different cables when the device is not able to work as expected.
5. If audio has noise when using the PotPlayer software, please adjust the audio
renderer to WaveOut on the software. The setting path is:
PotPlayer→Audio →Audio Output →Audio Renderer →WaveOut
6. If there are problems such as video flipping or wrong direction when using VLC
software, please rotate, flip or transpose the video in the VLC software to correct the
video. The setting path is:
Tool →Effects & Filters →Video Effects →Geometry →Transform
USB Pin Definition
P1
P2
VBUS
A4, B4, A9, B9
1
VBUS
Dn1
A7
2
D-
Dp1
A6
3
D+
GND
A1, B1, A12, B12
4
GND
SSTxn1
A3
5
SSRX-
SSTxp1
A2
6
SSRX+
GND
A1, B1, A12, B12
7
GND
SSRxn1
B10
8
SSTX-
SSRxp1
B11
9
SSTX+
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BZBGEAR BG-4K120CHA 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
[e-mail]
Live Chat
bzbgear.com
Warranty
BZBGEAR Pro AV products and cameras come with a three-year warranty. An extended
two-year warranty is available for our cameras upon registration for a total of five years.
For complete warranty information, please visit bzbgear.com/warranty.
For questions, please call 1.888.499.9906 or email [e-mail].
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-4K120CHA 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.
Address: 830 National Drive #140, Sacramento, CA 95834, USA ·Tel: [phone] ·Email: [e-mail] 20