About MediaPort 7000 and ChannelPort timing
NOTE:
“HD/SD-branded” refers to Independent Branding mode.
Related information
About MediaPort 7000 and ChannelPort timing
on page 156
GPIO/RS-422 connector signal assignments
on page 181
About MediaPort 7000 and ChannelPort timing
Timing works the same way on both MediaPort 7000 and ChannelPort modules.
If reference VITC is present on the timing input of a MediaPort or ChannelPort, it will provide the timecode
information to any Players associated with that MediaPort or ChannelPort, unless it is overridden by a
LTC connection on the Spectrum video server.
If a LTC timecode source is connected to the Spectrum video server, the Spectrum video server
automatically uses that as the timecode source for any attached Player. This setting overrides the
reference VITC from the MediaPort or ChannelPort for purposes of automation. However, if the attached
Player is configured with a different frame rate than that of the LTC input, then its reference will not be
overridden. For example, a LTC input with a frame rate of 25 Hz would not override the reference for a
player configured with a frame rate of 29.97 Hz.
GPIO/RS-422 connector signal assignments
The GPIO/RS-422 connector on a ChannelPort module can be connected to an external device and used
to control players, connect to an Emergency Alert System (EAS), and control graphics in a number of
ways.
ChannelPort GPIO triggers can be used to:
• Add a Fade Layer for a graphic
• Toggle graphics on or off
• Toggle all graphics on or off except an Auto Load graphic
• Mute audio and load a specified “trouble slate” graphic
• Perform mixer transitions
• Perform mixer ARC control
• Perform Playlist operations
The following figure describes the connector pins. Note that this is a female connector.
Figure 8-5: GPIO/RS-422 signal assignments
181
Spectrum System 8.4 Installation Guide
