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52 • Front Panel Menu System SRG-4500 User Guide (v7.0)
Offset, Description
For SD SDI channels, the Offset is represented as:
0000000 00.00µ 000.00º, V = 0000, H =0000
.
For Composite 1, Black 1, and Tri-Black channels, the Offset is represented as:
0000000 00.00µ 000.00º, Fr
= 0, V = 0000, H = 0000, Sc = 000
.
This menu pair allows the user to select the timing offset from the SPG reference datum for the video output they
are operating on. The timing offset is defined in two rows which are intimately linked. Either menu line can be
edited - each menu line reflects changes in the other line. A brief description of the timing offset calculations is
given here.
In the top line; the timing offset is a number of pixels delayed from the SPG reference datum. Where displayed, the
offset is also decoded, for information only, as an H offset (in microseconds) and SC offset (in degrees).
In the top line, the timing offset is editable and is represented as a “large number”:
This “large number” will vary depending on the selected format.
In the bottom line, the timing offset is decoded into picture offsets expressed as:
Frame and Sub-carrier offsets only appear when PAL or NTSC is selected on Composite 1, Black 1 and the
Tri-black outputs.
15
1920x1035/60/i
36
1920x1080/47.95/p
16
1920x1035/59.94/i
21
1920x1080/23.98/p
17
1920x1080/30/p
22
1920x1080/60/i
18
1920x1080/29.97/p
23
1920x1080/59.94/i
19
1920x1080/25/p
24
1920x1080/50/i
20
1920x1080/24/p
e.g. 0-2474999 for Standard = 28
Description =
1920x1080/59.94/i
e.g. 0-726404095 for Standard = 05
Description =
720x525/59.94/i NTSC-M
Frame offset
Fr=0
where Fr=0-1 or 0-3 depending on the selected video format
Line offset
V=0000
where V=0 up to the total number of video lines in the selected format
Pixel offset
H=0000
where H=0 up to the total number of video pixels in each line of the
selected format
Sub-carrier offset
Sc=0000
where Sc=0 up to the total number of sub-pixels that equate to one cycle of
sub-carrier in the selected format
Table 7.3 Decoded Descriptions
nn= Description = nn= Description =