passes its EDID information back to the transmitter. The display device attached to the primary
receiver should be representative of the displays attached to other receivers.
The MPX transmitter is pre-configured with default EDID information, which indicates support
for a fixed set of low video resolutions at 60 Hz. Higher resolutions are added as the transmitter
learns the capabilities of the attached display devices from actively bound MPX receivers. This
active EDIDinformation is stored in non-volatile memory and is maintained by the transmitter
unless it is intentionally restored to factory default settings. The process occurs as follows:
• The active EDID string is blank.
• When a receiver binding occurs, if the receiver is not the primary and if the active EDID
string is blank, the transmitter merges the received and default EDID strings so the
resulting string represents the common features supported by both devices. This new string
is stored as the active EDID and reported to the source device.
• When the primary receiver binds with the transmitter the first time, the merge process is
repeated using the default and primary EDID settings.
• When bindings are established with subsequent receivers, no action is taken.
• If a different receiver is selected as the primary via the transmitter’s web interface, the
merge process is repeated when a new primary EDID string is received.
• If the primary display device is replaced with a different model, the receiver reports the
information to the transmitter and a merge process takes place.
NOTE: If an access point is used between the primary receiver and the transmitter, the primary receiver needs to
be configured as "Primary" on the access point; likewise, the access point needs to be configured as "Primary" on
the receiver.
NOTE: A blank screen may temporarily occur as EDID changes are being processed. Restart the video session for
the change to take effect.
Video Cross Conversion
MPX extender systems are able to pass both interlaced and progressive video formats, but they
do not support interlacing or deinterlacing. It is possible cross-convert a signal from one video
format to another through the extender network. For example, RGB video received by
transmitter may be converted for output to an HDMI display device by an MPX receiver. The
receiver is able output either HDMI or DVI-D signaling as long as the input and output
resolutions are consistent. The system does not provide video scaling.
Chapter 1: Product Overview 11