About video signal fields and frames, Setting switching parameters – Grass Valley UniConfi NVISION Series v.2.1 User Manual
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UniConfig
User’s Guide
About Video Signal Fields and Frames
An interlaced video frame is composed of two fields, field 1 and field 2. For NTSC, each frame is
divided into 525 scan lines. Because a field is half a frame, each field is composed of 262.5 scan
lines.
For NTSC interlaced video, for example, there are 29.97 frames per second or 59.94 fields per
second. For NTSC progressive video, there are only frames, or put another way, frames and fields
are equivalent, so there are 59.94 frames per second. Some other video frame rates differ.
Depending on the router type, UniConfig lets you specify the following:
•
The outputs for which the router will switch video on a frame or a field basis
•
Whether the router has dual reference or redundant reference and if dual, which outputs use
reference 1 and which use reference 2.
•
Which outputs switch according to SD format and which outputs switch according to HD.
•
Which outputs use reclockers.
•
Which outputs allow cross-fade (NV7512 only).
Setting Switching Parameters
You can set switching parameters for video or audio routers. Depending on the router being
configured, different fields display. Differences for specific routers are noted in the following
procedures. Be sure to follow the instructions for your specific router.
Most routers require a video reference connection for proper switching.
The EC9535 is a “GSC node bus” converter and is not configured in the same way as other
routers. For details on setting up switching parameters for an EC9535 see
Following are setup methods for these router types:
NV5100MC or NV5128 Multi-Format Router
NV7256 and NV7256-Plus Routers
NV7512 and NV7512-Plus Routers
NV8288 and NV8288-Plus Routers
NV8500 Family Standard Routers
Note that the NV5256 machine control router does not use switch points. Therefore, there is no
‘Switch Point Page’ for NV5256 routers.
Note
Each control card in a router frame must be configured separately and identically.