GUIDE TO INSTALLATION AND OPERATION
26
| XVP-1801
masking is shown on the top right Output screen by graying out the masked portion. Note that mask – or
Background - color may be changed in the
Advanced
tab. The maximum amount of masking that can be
introduced depends on the image format, and is measured starting from the edges of the displayed image,
as shown in the following table. Masks can cover a minimum of 25% of the active area.
Image format
Pixels
Lines
525 106
76
625 106
88
720p 176
106
1080i 256
150
Note
: all masks are adjusted in steps of 2 pixels or 2 lines.
The
Timing
tab
The 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 (lines)
: With this adjustment, a value ranging
from
–16
to
+15
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 (µs):
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;
0
to
64.00
µs for 625-line operation; etc) 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 6 interlaced frames (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 7 frames if the additional delay is 6. With a reference, up to 6 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 the Dolby-E decoder on the companion audio
card, the additional frame delay must be set to at least one (1) frame or more depending on the module
used.
Figure 3.10
Video Output group – Timing tab