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Caption Assist

CA C3

QUICK START GUIDE

The Caption Assist (CA C3) is a professional, hardware-

based live captioning system. During a video call or other 

live event, the Caption Assist can put real time captions 

on any video source. Many languages and dialects can be 

selected for captioning, and is a perfect fit for churches, 

classrooms and other presentations.

General Installation

Connecting the Video Source and Outputs

IMPORTANT: Be sure to power down the Caption Assist 

before connecting or disconnecting any devices. The 

Caption Assist will automatically detect new devices upon 

turning the power on.
HDMI Connectors 

To connect HDMI video: 

HDMI Input into Caption Assist:

 Using HDMI video cable, 

connect the cable to the HDMI In port on the back panel of 

the Caption Assist.

HDMI Output from Caption Assist:

 Using HDMI video 

cable, connect the cable to the HDMI Out port on the back 

of the Caption Assist to HDMI In on a HDMI display.

Required Use of Multiple Devices

The output typically cannot be connected to the same 

device as the input. For example, laptops do not have an 

HDMI In port, but do have an HDMI Out port.

Any data sent to the HDMI Output is also sent out via a 

digital stream.

Displaying the stream or output into the same device as the 

input will cause video to show a video of itself, creating a 

visual echo. For more explanation, see the full manual.

Connecting USB Devices

Connect microphones or other USB devices to any USB 

port on the Caption Assist. The system supports up to 5 

USB 3.0 devices and 1 USB B device. 

For a standard microphone,

 connect using the included 

USB to XLR cable.

Connect the USB Mouse to use the menu system for 

configuring the device.

Power On

To power on the Caption Assist:

1.  Plug the power cord into the back of the Caption Assist 

and then into any grounded outlet.

2.  Plug the power cords from any video source(s), 

display(s), or other devices into any grounded outlet.

3.  Turn on each of the connected units, and then press 

the power button on the front panel of the Caption 

Assist.

NOTE: In order for the Caption Assist to properly sync with 

the video signals, the sources should be turned on 

first.

After a moment, a Caption Assist splash screen will appear, 

followed by the initializing of the ports, and ending with a 

copyright message.

After the startup process, the default input source will be 

shown.
If this process is different for you, recheck your installation 

and power on again. Call Williams AV for support if it is still 

unsuccessful.

Network Connection

A network connection to the Caption Assist is required to 

get translation data.

Network Setup

1.  Activate the menu system by clicking on the top of 

the display screen using the included mouse.

 

The 

Main Menu appears. Select the

 Network

 option. The 

Network Menu appears.

2.  Select 

Network Setup. 

3.  Enter the required network information

Consult with 

your IT administrator if you need help with these entries.

4.  Select 

Apply Settings

 to finish the network 

configuration.

5.  Exit the menu system.

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