TROUBLESHOOTING

or horizontally graduated colors – better use monochrome backgrounds. They allow higher compression -> higher frame rates.

Your mouse is moving like ‘hanging on a rubber band’

This problem derives from different single problems, which accumulate to a delay between the true mouse movement and displaying the movement of the mouse pointer on the screen. Depending to our measurements, a delay of approx. 100- 150msec are recognized as disturbing.

The total delay comes from (time values are approx. values):

•5 to 15msec for mouse movement and data transmission to CPU

•50 to 70msec data processing time in the CPU until the changed data reach the graphic card output connector

•15 to 45mcec getting the graphic data into the local unit of the extender system and transmitting to the remote unit (60 to 20fps)

•10 to 100msec data processing time in the display until the data are displayed on the screen (where 15msec normally are only reacht by CRT tubes)

In total there are delay times between 85 and up to 230msec possible, where most of this delay is NOT caused by the extender system (Extender based delay is 5 to 15msec data transfer to the CPU and 15 to 45msec frame transfer to the remote unit

–in total 20 to 60mesec. Depending to our experiences, even a step from 100msec delay to 140msec (i.e. by inserting an extender system to a CPU-monitor link) may cause visible effects.

Please note, that even a monitor directly connected to a CPU has a delay of 70 to 175msec. So (under special conditions) even the bare CPU/monitor link shows this ‘rubber band behaviour’. If you now insert an extender system, the problem may occur and is (in false) dedicated to the extender system, where it only gives a small part to the total problem

How to solve the problem: Use a display with a low delay time (NOTE: This is NOT the reaction time indicated by the manufacturer. This reaction time is only the time the display needs, to switch a black pixel to get white or vice versa, but not how long it takes from receiving the data on the connector until they are displayed on the screen.) Please use a lower resolution or use a desktop background which is better suitable for compression: Avoid photos for background or horizontally graduated colors – better use monochrome backgrounds. They allow higher compression -> higher frame rates. If – and only if the link has frame dropping, a reduction from 30fps to 60fps saves 17msec and from 20fps to 60fps saves 34msec.

USB-HID device

Your USB-HID device does not work

Although our interface supports HID devices, we can’t ensure that every connected device is running. In case of a malfunction please contact our technical support.

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Black Box ACS4222A-R2-xx, ACS2009A-R2-xx manual USB-HID device, Your mouse is moving like ‘hanging on a rubber band’
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ACS2028A-R2-xx ACS2209A-R2-xx, DVI-D-Fiber-KVM-Extender Single and DualHead, ACS2009A-R2-xx, ACS2228A-R2-xx ACS4001A-R2-xx, ACS4222A-R2-xx specifications

The Black Box ACS4022A-R2-xx series is a robust line of KVM extenders designed to meet the demands of modern computing environments. These devices, including models ACS4201A-R2-xx, ACS4222A-R2-xx, ACS2228A-R2-xx, ACS4001A-R2-xx, and ACS2009A-R2-xx, provide seamless connectivity for both single and dual-head systems, enabling users to manage multiple servers and computers from a distance. Each model incorporates high-performance technologies that ensure optimal transmission of video and control signals over extended distances.

One of the standout features of these KVM extenders is their ability to transmit high-definition DVI-D video signals, supporting resolutions up to 1920x1200. This capability is essential for professionals working with graphic-intensive applications, such as video editing, design, and simulation work. The extenders utilize fiber optic cabling, which allows for transmission over long distances—up to 10 kilometers—without signal degradation, making them ideal for setups in large facilities or across multiple rooms.

The ACS series includes both single-head and dual-head options, giving users the flexibility to configure their workstations based on their needs. The dual-head functionality is particularly advantageous for multitasking, allowing users to operate multiple screens simultaneously, thereby enhancing productivity. Additionally, these extenders feature USB connectivity, which facilitates the use of various peripherals, such as keyboards, mice, and audio devices, enhancing the overall user experience.

Reliability and ease of use are core characteristics of the Black Box ACS series. The devices are plug-and-play, meaning they can be easily installed without the need for complicated configurations. This aspect is particularly beneficial for IT managers in fast-paced environments who require efficient solutions with minimal downtime. The ACS series also features robust security protocols to protect sensitive data during transmission, ensuring compliance with industry standards.

In summary, the Black Box ACS4022A-R2-xx series and its counterparts are powerful KVM extenders that provide high-quality video and control signal transmission over great distances. With their support for high resolutions, flexible configurations, ease of use, and security features, they cater to the needs of diverse computing environments, making them an ideal choice for professionals seeking to optimize their workflows.
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