Thinklogical DCS StudioPRO Product Manual page 20

3.5.1.2. Static Mode
Static DDC mode is typically used in DCS switched situations. In some switched situations the customer
may be using multiple monitors that are all capable of handling the same video resolution but for one
reason or another, some of the monitors in the system cause some video cards issues that cause the
video card to turn off the video output. Another possible use of Static DDC mode is the when a video
card does not recover from a video cable being hot-plugged while the system is booted. Static mode
resolves these issues by preventing the TX from writing to the non-volatile DDC memory stored on the
TX and static mode prevents the TX from informing the video card of a change in DDC data. In this
mode the CPU may be booted up with the TX off or disconnected from the RX since the TX non-volatile
DDC memory can be read by the video card without TX power.
3.5.1.3. PassThru Mode
PassThru DDC mode (Pass Through) mode gives the video card direct access to the monitor connected
to the RX as if connected via copper wire. This mode is useful in HDCP content protection applications.
In PassThru DDC mode the video card can write-to and read-from the monitor directly. The video card
will be informed of the presence or absence of a monitor connected. In this mode there must be a valid
data communications path between the CPU and a connected monitor before the CPU can be booted.
When a Logical Solutions product is supplied to customers it typically comes with a default table that
provides a maximum resolution of 1920x1200. If the customer elects to use the default Logical Solutions
DDC data in static mode, the video card will read that the TX (emulating a monitor) is capable of showing
1920x1200. If the monitor connected at the RX cannot display a resolution as high as 1920x1200 the
monitor will not display an image.
MAN-000018 14 REVISION A