User guide

13
Loss-of-signal switcher
In the event of a signal loss on the SDI 1 input, the MC-100 will automatically
switch to the input on SDI 2 to output a video signal on SDI 4. The SDI 3 and
HDMI outputs will display a purple screen as long as the signal on SDI 1 remains
invalid. This indicates that there is no valid input on SDI 1. When a valid primary
signal is again detected on SDI 1, SDI 4 will automatically switch back to display
the signal from SDI 1. The MC-100 must detect nothing but a clean valid video
signal during the delay or it will not switch. The SDI 3 and HDMI outputs will
also return, and display the signal from SDI 1 once the clean signal is detected.
Remarks
• To avoid glitches when switching channels, you must set the reference
source priority to the channel you want to use as the backup, and it is
recommended to use SDI 2 as the backup channel. As long as the backup
channel stays valid for the entire operation, the loss and return of channel 1
should result in a clean, glitch-free switch. For more information on setting
the reference source priority, see “Specifying your input settings” on
page 16.
• A switch is triggered when the MC-100 detects an invalid SDI signal of
approximately one frame or longer in duration. A loss of video content, such
as a black or blank signal, will not trigger a switch.
• You must use the same video format on both inputs.
• This feature is not available when you have NTSC or PAL as the input video
format.
• While the initial switch from the primary to the backup input is done as soon
as a fault is detected in the signal, the automatic return does not occur
instantly. The MC-100 must detect a few seconds of valid video before a
return will occur. The delay depends on the resolution and frame rate of the
signal input.
• You must define specific input channels to output channels in the output
menu. The switching functionality does not work in Bypass mode.
Enabling the loss-of-signal switcher
You enable the loss-of-signal switcher by configuring settings in the OSD main
menu, and by using the OSD buttons.
1 Access the Matrox MC-100 on-screen display (OSD) main menu.
For more information, see “Accessing the OSD main menu” on page 14.
2 From the input settings, set your REFERENCE SOURCE PRIORITY to the
SDI input you want as the backup (SDI 2 is recommended).
For more information, see “Specifying your input settings” on page 16.
3 From the output settings, set SDI 3, SDI 4, and the HDMI output (optional)
to
Channel 1.