Ross Opengear UDC-8625A Series, User Manual, Page: 64 / 174

4–6 • AFD UDC-8625A Series User Manual (Iss. 11)
Blank Number of Active Lines
You can choose to remove encoded signals, like closed caption data and timecode, that may
appear at the top of the active video in SD inputs. This only applies to SD inputs with AFD 1000.
The remaining lines are processed through the scaler to fill the production aperture, except for SD
to SD with no ARC. For SD inputs with an AFD code other than 1000, the AFD specification is
adhered to. Note the AFD specification indicates 480i has 480 lines starting at Line 6 (SMPTE
125M allows 480i to have 487 active lines).
Refer to Table 4.4 for the first line of processed video.
Table 4.4 Blank Number of Active Lines
Blank Number of
Active Lines
First Line of Processed Video
525 625
F1 F2 F1 F2
0 20 20 (283) 23 336
1 21 20 (283) 24 336
2 21 21 (284) 24 337
3 22 21 (284) 25 337
4 22 22 (285) 25 338
5 23 22 (285) 26 338
6 23 23 (286) 26 339