GUIDE TO INSTALLATION AND OPERATION
48
| XVP-3901
format, and is measured starting from the edges of the displayed image, as shown in the following table. Masks can
cover a maximum of 25% of the active area.
Image format
Pixels
Lines
525
106
76
625
106
88
Note
: all masks are adjusted in steps of 2 pixels or 2 lines.
5.5.2 SD Output – Timing tab
he Timing tab provides access to timing adjustments which
affect the signal outputs. There are two slider controls, each
with a data reporting box which shows the current value, and
into which values can be typed directly. The total delay is
reported at the top of the window.
Vertical SD (lines)
: With this adjustment, a value ranging
from
–8
to
+7
lines, compared to the reference or the
processing delay, may be set. This adjustment can be used
in conjunction with the horizontal timing adjustment.
Horizontal SD (µsec):
With this adjustment, a value ranging
from zero to the equivalent of 1 horizontal line in the current
operating format (e.g. ranging from
0
to
63.46
µs for 525-line
operation and
0
to
64.00
µs for 625-line operation) compared
to the reference or the frame boundary, may be set.
Additional Frame Delay
: This parameter affects the overall processing delay of the card. It affects both the HD and SD
output by adding supplemental frame delay to the current processing delay. This parameter will add a delay ranging
from 0 to 15 interlaced frames (i.e. steps of 33 ms in 59.94 Hz and 40 ms in 50 Hz) to the current processing delay.
Without a reference, the normal processing delay is 1 frame. You can extend this delay up to 16 frames if the
additional delay is 15. With a reference, up to 15 frames can be added to the frame sync delay which depends on the
timings between the input and the reference.
Note that, in order to compensate for the processing delay of a Dolby-E/Dolby Digital decoder or a Dolby-E encoder
installed on the XVP-3901 or on the companion audio card, the additional frame delay must be set to at least one (1)
frame. On the other hand, if a Dolby Digital encoder is installed, the additional frame delay must be set to at least six
(6) frames for 59.94 Hz formats and at least five (5) frames for 50 Hz formats.
Figure 5.28 Video Outputs SD - Timing tab