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USB 3.0 Full HD Video Capture Device with HDMI 
2.0a loopout, Audio & HDR10 to SDR Conversion

The CAP-502MJH USB 3.0 Full HD Video Capture 

Device with HDMI 2.0a loopout, Audio & HDR10 to SDR 
Conversion provides a professional way to capture 
HDMI video signals. It adopts USB 3.0 interface, which 
can realize high-speed transmission. Besides, the 
HDMI input and loopout can support up to 4K2K@60. 
With this device, users can connect to 4K2K@60 
source and capture Full HD (1080p60) video. 
CAP-502MJH also uses large volume image buffer 
technology which effectively avoids the video tearing. 
The high sampling rate and high sampling accuracy 
assure images with high sharpness, rich details, and 
less color edges. Also, with HDR10 to SDR conversion, 
PS4/Xbox players can enjoy 4K HDR games on 4K TV 
and record the real-time 1080p video streams with 
SDR quality through USB 3.0 at the same time.

TROUBLESHOOTING

CAP-502MJH

User Manual

rev: 200528

Made in Taiwan

INTRODUCTION

WARRANTY

P1

P2

VBUS

D-

D+

GND

SSRX-

SSRX+

GND

SSTX-

SSRX+

Shield

1

2

3

4

5

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8

9

SHELL

1

2

3

4

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8

9

SHELL

 

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 helps.

USB PIN DEFINITION

1.

2.

3.

4.

5.

OBS is popular USB capture freeware and has excellent 

compatibility. Please download it and start with OBS if 

users are not familiar with USB capture device. 
https://obsproject.com/download
Due to the complexities of OS and computer hardware, 

different USB ports on PC or laptop may have different 

performance or limitation. Please try all USB ports to 

see if there are any differences.
Please must use the USB cable in box. We do not 

guarantee the overall performance when the USB 

capture box works with some other USB cables.
HDMI cable quality may also play an essential role 

when capturing. Please be sure of that HDMI cable can 

do 1080P@60 HDMI signal transmission or better. Try 

different cables when the device is not able to work as 

expected.
If audio has noise, please adjust sampling frequency 

setting on PC or laptop. If the default sampling rate is 

48000 Hz, please select 44100 Hz and vice versa. The 

path of setting sampling frequency on windows 10 is: 
Start 

 Setting 

 System 

 Sound 

 Device 

properties 

 Additional device properties 

 Advanced

The SELLER warrants the CAP-502MJH USB 3.0 

Full HD Video Capture Device with HDMI 2.0a 

loopout, Audio & HDR10 to SDR Conversion to be free 

from defects in the material and workmanship for 1 

year from the date of purchase from the SELLER or 

an authorized dealer. Should this product fail to be 

in good working order within 1 year warranty period, 

The SELLER, at its option, repair or replace the unit, 

provided that the unit has not been subjected to 

accident, disaster, abuse or any unauthorized 

modifications including static discharge and power 

surges.

Unit that fails under conditions other than 

those covered will be repaired at the current price 

of parts and labor in effect at the time of repair. 

Such repairs are warranted for 90 days from the day 

of reshipment to the BUYER. If the unit is delivered 

by mail, customers agree to insure the unit or 

assume the risk of loss or damage in transit. Under 

no circumstances will a unit be accepted without a 

return authorization number.

The warranty is in lieu of all other warranties 

expressed or implied, including without limitations, 

any other implied warranty or fitness or 

merchantability for any particular purpose, all of 

which are expressly disclaimed.

Proof of sale may be required in order to claim 

warranty. Customers outside Taiwan are 

responsible for shipping charges to and from the 

SELLER. Cables are limited to a 30 day warranty and 

cable must be free from any markings, scratches, 

and neatly coiled.

The content of this manual has been carefully 

checked and is believed to be accurate. However, 

The SELLER assumes no responsibility for any 

inaccuracies that may be contained in this manual. 

The SELLER will NOT be liable for direct, indirect, 

incidental, special, or consequential damages 

resulting from any defect or omission in this 

manual, even if advised of the possibility of such 

damages. Also, the technical information contained 

herein regarding the CAP-502MJH features and 

specifications is subject to change without further 

notice.

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