ATEN CS1924-AT-A 4-Port USB 3.0 4K DisplayPort KVMP Switch User Manual

1. Introduction

The ATEN CS1924-AT-A is a 4-Port USB 3.0 4K DisplayPort KVMP Switch designed to allow users to control up to four DisplayPort computers from a single USB keyboard, USB mouse, and DisplayPort monitor console. This device supports superior video quality up to 4K UHD (3840 x 2160 @ 60 Hz) and 4K DCI (4096 x 2160 @ 60 Hz). It also features a 2-port USB 3.1 Gen 1 hub for SuperSpeed 5 Gbps data transfer rates, enabling sharing of USB peripherals among connected computers. The switch supports Multi-Stream Transport (MST) for multiple monitors through a single DisplayPort connector and DisplayPort Dual-Mode (DP++) for compatibility with HDMI and DVI signals via appropriate adapters.

2. Package Contents

Verify that all components are present in your package:

1x ATEN CS1924-AT-A 4-Port USB 3.0 4K DisplayPort KVMP Switch
4x DisplayPort 1.2 Cables
4x USB 3.0 Type-B to Type-A Cables
4x Audio Cables (3.5mm jack)
1x Power Adapter
1x User Instructions (this manual)

3. Product Overview

3.1 Front Panel

Front view of the ATEN CS1924-AT-A KVMP Switch — **Figure 3.1: Front Panel Layout.** This image displays the front of the ATEN CS1924-AT-A KVMP Switch, showing the ATEN logo on the left, four port selection buttons labeled 1 through 4, LED indicators above each button, a USB 3.0 port, and 3.5mm audio input/output jacks for microphone and headphones.

The front panel provides direct access to port selection buttons, LED indicators for active ports, a convenient USB 3.0 port for quick peripheral connection, and audio jacks for headphones and a microphone.

3.2 Rear Panel

Rear view of the ATEN CS1924-AT-A KVMP Switch — **Figure 3.2: Rear Panel Layout.** This image illustrates the rear panel of the ATEN CS1924-AT-A KVMP Switch. From left to right, it features a DC power input, two USB 2.0 ports for keyboard and mouse, 3.5mm audio output and input jacks, and four sets of computer connection ports (CPU 1 to CPU 4). Each computer port set includes a DisplayPort input, a USB 3.0 Type-B input, and 3.5mm audio input/output jacks.

The rear panel houses the power input, dedicated USB ports for console keyboard and mouse, audio connections, and the four sets of DisplayPort and USB 3.0 inputs for connecting to the computers.

4. Setup and Installation

Follow these steps to set up your ATEN CS1924-AT-A KVMP Switch:

Power Off All Devices: Ensure all computers, monitors, and the KVMP switch are powered off and unplugged from their power sources.
Connect Console Devices:
- Connect your DisplayPort monitor to the DisplayPort output port on the rear panel of the KVMP switch.
- Connect your USB keyboard to the dedicated USB keyboard port on the rear panel.
- Connect your USB mouse to the dedicated USB mouse port on the rear panel.
- (Optional) Connect your speakers/headphones to the audio output jack and microphone to the audio input jack on the rear panel.
Connect Computers: For each computer (up to four):
- Connect one end of a DisplayPort cable to the computer's DisplayPort output and the other end to a DisplayPort input port (e.g., CPU 1) on the rear panel of the KVMP switch.
- Connect one end of a USB 3.0 Type-B to Type-A cable to a USB 3.0 port on the computer and the other end to the corresponding USB 3.0 Type-B input port (e.g., CPU 1) on the rear panel of the KVMP switch.
- (Optional) Connect audio cables from the computer's audio output/input to the corresponding audio jacks for that CPU port on the KVMP switch.
Connect Power: Plug the provided power adapter into the DC 5V power input on the rear panel of the KVMP switch, then plug the adapter into an AC power outlet.
Power On: Power on the KVMP switch, then power on your monitor, and finally power on the connected computers.

Note: For optimal video performance, especially with 4K resolutions, use high-quality DisplayPort 1.2 or higher certified cables. Longer DisplayPort cables (e.g., 10 feet or more) may sometimes require a video card with stronger signal output or active DisplayPort cables to maintain signal integrity through the switch.

5. Operating Instructions

5.1 Switching Between Computers

The ATEN CS1924-AT-A offers multiple methods for switching between connected computers:

Front Panel Pushbuttons: Press the corresponding port selection button (1-4) on the front panel to switch to the desired computer. The LED above the button will illuminate to indicate the active port.
Hotkeys: Use keyboard hotkey combinations to switch ports. Refer to the full product manual for a complete list of hotkey commands. Common hotkeys include:
- Press Scroll Lock twice, then the port number (1-4).
- Press Ctrl twice, then the port number (1-4).
Note: Some gaming or specialized keyboards may require specific modes (e.g., BIOS mode) to ensure hotkey functionality.
Mouse Switching: Move the mouse cursor to the edge of the screen to switch to the next active port. This feature may need to be enabled and configured.

5.2 USB 3.0 Hub Functionality

The KVMP switch includes a 2-port USB 3.1 Gen 1 hub on the front panel, allowing you to share USB peripherals such as flash drives, printers, or webcams among the connected computers. Simply plug your USB device into one of the front panel USB ports. The device will be accessible by the currently active computer.

5.3 Audio Switching

Audio input and output are switched along with the video and USB signals when you change ports. Ensure your speakers/headphones and microphone are connected to the console audio jacks on the KVMP switch's rear panel, and that audio cables are connected from each computer to the corresponding CPU audio jacks.

6. Maintenance

To ensure the longevity and optimal performance of your ATEN CS1924-AT-A KVMP Switch:

Cleaning: Use a soft, dry cloth to clean the exterior of the switch. Avoid using liquid or aerosol cleaners.
Ventilation: Ensure the switch is placed in a well-ventilated area to prevent overheating. Do not block ventilation openings.
Cable Management: Keep cables organized and avoid excessive bending or tension, which can damage connectors or internal wiring.
Firmware Updates: Periodically check the ATEN website for any available firmware updates for your model. Firmware updates can improve performance, add features, or resolve known issues.

Image showing product testing for keyboard life, shock, and drop tests — **Figure 6.1: Product Quality Testing.** This image illustrates various quality assurance tests performed on ATEN products, including keyboard life tests, shock tests, and drop tests, ensuring product durability and reliability.

7. Troubleshooting

If you encounter issues with your KVMP switch, refer to the following common problems and solutions:

Problem	Possible Cause / Solution
No video display or flickering screen.	Ensure all DisplayPort cables are securely connected. Verify that the monitor is powered on and set to the correct input. Try using shorter, high-quality DisplayPort 1.2 or higher certified cables. Longer cables can sometimes degrade signal quality, especially at 4K resolutions. Some video cards may have weaker DisplayPort signal output; consider testing with a different video card or active DisplayPort cables if issues persist. Reset the connection by switching to another port and then back to the problematic computer.
Keyboard or mouse not responding.	Ensure the keyboard and mouse are connected to the dedicated console USB ports on the rear panel. Try connecting the keyboard/mouse directly to the computer to verify functionality. Some specialized keyboards (e.g., gaming keyboards) may require a specific mode (e.g., BIOS mode) to function correctly through a KVM switch. If using a USB hub, try connecting the device directly to the KVMP switch's front USB 3.0 ports.
Audio not working.	Check all audio cable connections between the computers and the KVMP switch, and between the KVMP switch and your speakers/headphones. Verify audio settings on the active computer to ensure the correct output device is selected.
Switching is slow or unresponsive.	Ensure all cables are properly seated. Power cycle the KVMP switch and all connected computers. Update the KVMP switch firmware if a newer version is available.
Does not support ultra-wide monitors.	While the switch supports 4K resolutions, compatibility with specific ultra-wide monitor resolutions and aspect ratios can vary. This model may not fully support all ultra-wide configurations. Consult ATEN support for specific ultra-wide monitor compatibility.

8. Specifications

Feature	Detail
Model Number	CS1924-AT-A
Ports	4-Port KVMP Switch
Video Resolution	Up to 4K UHD (3880 x 2160 @ 60 Hz), 4K DCI (4096 x 2160 @ 60 Hz)
USB Hub	2-port USB 3.1 Gen 1 (5 Gbps)
Console USB Ports	2x USB 2.0 (for Keyboard/Mouse)
Operating System Support	Linux (and generally Windows, macOS)
Product Dimensions (LxWxH)	10.63 x 3.46 x 2.19 inches (27 x 8.8 x 5.6 cm)
Item Weight	2.01 pounds (0.91 kg)
Date First Available	January 23, 2017

9. Warranty and Support

ATEN products are designed for reliability and come with comprehensive support. For warranty information, please refer to the warranty card included with your product or visit the official ATEN website.

ATEN provides the following support services:

Localized Repair Centers: For RMA (Return Merchandise Authorization) service.
Extended Warranty Options: Variable value-added service packages are available.
Free Technical Support: Assistance is available, with responses typically within 4 hours.

For further assistance, product registration, or to download the latest drivers and firmware, please visit the official ATEN website or contact ATEN customer support.

Image illustrating ATEN's customer support services — **Figure 9.1: ATEN Support Services.** This image visually represents ATEN's commitment to customer support, highlighting services such as localized repair centers, extended warranty options, and free technical support with quick response times.

	ATEN CS1922M/CS1924M 2/4-Port 4K DisplayPort MST KVMP Switch User Manual User manual for the ATEN CS1922M and CS1924M 2/4-Port USB 3.0 4K DisplayPort MST KVMP Switch. Learn about installation, features, operation, and troubleshooting for this advanced KVM solution.
	ATEN CS784H 4-Port USB 4K HDMI KVMP Switch User Manual User manual for the ATEN CS784H 4-Port USB 4K HDMI KVMP Switch. Provides detailed information on installation, operation, features, and troubleshooting for connecting and managing multiple computers with a single console.
	ATEN CS784H: 4-Port USB 4K HDMI KVMP Switch Quick Start Guide Get started quickly with the ATEN CS784H, a 4-port USB 4K HDMI KVMP switch. This guide covers hardware overview, installation, and operation for seamless multi-computer control.
	ATEN CS1822 / CS1824 2/4-Port USB 3.0 4K HDMI KVMP Switch User Manual User manual for ATEN CS1822 and CS1824 2/4-Port USB 3.0 4K HDMI KVMP Switches. Learn about installation, features, operation, and troubleshooting for managing multiple computers with high-resolution 4K video and USB 3.1 Gen 1 connectivity.
	ATEN CS784H 4-Port USB 4K HDMI KVMP Switch User Manual This user manual provides comprehensive information for the ATEN CS784H 4-Port USB 4K HDMI KVMP Switch. Learn how to connect and manage up to four computers from a single console, featuring 4K HDMI video support, USB peripheral sharing, and convenient port switching options. Essential for optimizing desktop space and workflow in SOHO and office environments.
	ATEN CS1964 User Manual: 4-Port USB 3.0 4K DisplayPort Triple Display KVMP Switch User manual for the ATEN CS1964 4-Port USB 3.0 4K DisplayPort Triple Display KVMP Switch. Learn about installation, features, operation, and troubleshooting for efficient multi-computer management with high-resolution displays and USB 3.1 Gen 1 connectivity.

ATEN CS1924-AT-A