Frequently Asked Questions

Got a question about KVM2USB? Check out our quick answer guide.

Will KVM2USB work with USB 1.0 or USB 1.1?

No. KVM2USB transfers substantial amounts of data for each captured frame. USB 1.x buses are too slow (12Mb/s) and do not provide sufficient bandwidth for KVM2USB. USB 2.0 buses have a much higher transfer rate (480Mb/s), which allows the KVM2USB device to acquire and transfer several frames per second.

How can I verify whether my system has USB 2.0?

Most newer laptops have USB 2.0 or USB 3.0 ports (which are backward compatible with USB 2.0). Consult your laptop specifications to determine the type of USB ports on your laptop or follow the steps below:

To verify whether your system has USB 2.0 or 3.0, follow the steps below:

  1. On the host computer running Windows, click Start; a list of options appears.
  2. Right click on the Computer option; a drop-down menu appears.
  3. Choose Properties; a Control Panel Home window opens.
  4. Choose Device Manager from the side menu; a window listing the available devices opens.
  5. Expand the Universal Serial Bus controllers option; a list appears indicating the version of the USB.

How many frames per second can KVM2USB capture?

Typical results are between 28 and 2 frames per second. These results depend on the resolution of your screen, the screen refresh rate, operation system and the speed of the computer that is acquiring the images. 

Does KVM2USB reduce the resolution of the images it captures in order to transfer it over the USB bus?

No. KVM2USB captures and transfers every pixel of the original VGA frame in 16-bit per-pixel RGB format. In this respect, KVM2USB provides better quality than a VGA-to-video converter paired with a Composite or S-Video grabber. 

Can KVM2USB work on Windows NT, Windows 3.x/95/98/SE/ME?

No. Unfortunately, many of those systems have very poor support – or no support at all – for the USB 2.0 bus.

The video mode that I am using is not listed in the list of supported modes for KVM2USB. Can KVM2USB capture it?

Yes. KVM2USB supports custom VGA modes. Please refer to the users guide for more details.

Images grabbed from some sources appear to be slightly shifted right or left. How this can be fixed?

KVM2USB has an automatic algorithm that crops visible images from the VGA frame. The algorithm may make a mistake, however, and be off by a few pixels. To adjust, open the Options dialog from Capture menu of the KVM2USB software. Select the Grabbing Parameters tab. Use the shift image horizontally slider to adjust the image a few pixels either direction. Click Apply

Can I connect two or more KVM2USB to one computer and capture signals simultaneously? What is the resulting rate of capture for each KVM2USB?

Yes, you can connect two or more KVM2USB devices and capture multiple signals simultaneously. You will need to run the KVM2USB application for each KVM2USB device attached. You will, however, notice a significant difference in frame rate for each additional active KVM2USB. The higher the performance of your computer, the better the possible frame rate. Our internal testing on a Dell Dimension 2400 (Celeron 2.4GHz processor, 512mb RAM) at 1024×768 with two KVM2USB devices, yielded average frame rates of 7.1 fps and 4 fps. In contrast, a Pentium 4, 3.0Ghz desktop with 512MB of RAM at 1024 x 768 yielded average frame rates of 9.52 fps and 5.85 fps. Please note that you must start the KVM2USB application after connecting each KVM2USB.

My system does not have PS/2 connectors for a keyboard and mouse. Can I still use KVM2USB with a PS/2 adapter?

Yes we have tested several PS/2 to USB adapters and they function well. The determining factor will be your system’s support for USB keyboard and mouse functionality.

My system doesn't allow me to hot-plug a keyboard or mouse. How can I use KVM2USB?

You will need to shut down the system prior to attaching the KVM2USB.

I have Japanese keyboard. Can I use IME (Input Method Editor) with KVM2USB?

By default KVM2USB emulates US keyboard. However, if you are using non-US keyboard almost all keys will work. You can use IME if you map IME activation key to different keystrokes on local and remote PCs.

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