Some computer and video resolutions can be mis-detected on CORIO units ifthe source is analog.

This is because the CORIO unit only has the horizontal and vertical frequencies (plus the sync polarities) to measure in order to work out the correct resolution

for the incoming analog source. For digital sources, there is no problem - since there is a clock signal available that can be used to measure the number of active pixels per line.

With just H & V frequencies, almost all resolutions can be detected properly - except those that share the same H & V frequencies but have different numbers of pixels per line.

An example of this is XGA (1024x768) and WXGA (1360x768). Although most sources will change the H & V sync polarities to allow proper detection, some do not. Both of these resolutions use similar H & V frequencies and
so the CORIO unit, depending on the actual frequency of the source, may pick the wrong one.

If this occurs, it is best to remove the 'bad' resolution from the CORIO unit's database. A simple way of doing this is to toggle the Interlaced setting. To do this, go into 'Adjust resolutions' for the resolution you want to remove, and swap over the Interlaced setting from Off to On (or vice versa). Dis-connect and re-connect your source, and the 'bad' resolution will no longer be detected.

Take care not to remove resolutions you want to use. If you lose track of which resolutions you've removed in this way, or need to put things back to factory settings, you will need to perform a firmware update.

  • Video Wall Processing

    The best technology for creating eye-catching visual experiences.

  • Video Scaling & Switching

    Experience ultra-flexible, feature rich scalers and switchers.

  • Multi-Window Processing

    Processing for multi-window environments.

  • Signal Distribution

    Ultra-reliable, stress free signal management.

  • Racking & Power

    Innovative, hassle-free racking products.


With more than 30 years of experience in the AV industry, tvONE has a proven track record for DEVELOPING innovative solutions that deliver exceptional experiences, MANUFACTURING high quality, ingenious products for video processing, signal management and racking and DELIVERING world class customer service in a wide range of vertical markets






House of Worship

Rentals and Staging

Live Events

If you have previously signed up for our newsletter, it is likely you have been removed due to new GDPR regulations. Please re-subscribe today.

Keep in touch