GUIDE TO INSTALLATION AND OPERATION
16
| FRS-3901
Freeze Type
Auto Freeze Mode
Manual Mode
•
Field 1
Freeze to last valid FIELD
Freeze to last valid FIELD 1
•
Field 2
Freeze to last valid FIELD 2
•
Frame
Freeze to last valid FRAME
•
Black
Freeze to BLACK
Auto Freeze:
This pulldown (ON/OFF) enables or disables the auto freeze function. In Auto Freeze mode, a
reference must be present to ensure a glitchless output when a freeze is activated. There are only two freeze
possibilities in Auto mode: freeze to last valid Field or freeze to black. When Auto Freeze mode is disabled, the
content of the active picture will reflect whatever garbage is present at the input but, if a reference is present, the
output synchronization will be maintained to avoid unlocking downstream equipment.
Manual:
Select this checkbox to immediately freeze the output according to the selected Freeze Type mode.
Note:
The manual freeze setting is saved in the non-volatile memory of the card. If the manual freeze is activated and
the power is cycled, the card will start in freeze mode at the next power-up and the output will be invalid. Just turn off
the manual freeze to restore the output.
In all cases, audio will be muted when there is an input error. See the audio section for more information.
5.2.3 Timing tab
The Timing tab provides access to timing
adjustments which affect the signal outputs. There
are three 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
+16
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 (µsec):
With this adjustment, a value
ranging from zero to the equivalent of 1 horizontal
line in the current operating format compared to the
reference or the frame boundary may be set.
Frame Delay (frames)
: This parameter affects the
overall processing delay of the card. It adds
supplemental frame delay to the current processing
delay. This parameter will add a delay ranging from 1 to 15 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 to16 frames using this slider. 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 and Dolby Digital decoder or a Dolby E
encoder installed on the AMX-3981 card, the frame delay must be set to at least one (1) frame. On the other hand, if
a Dolby Digital and Dolby Digital Plus encoder is installed, the frame delay must be set to at least seven (7) frames for
59.94 Hz formats and at least six (6) frames for 50 Hz formats.
Figure 5-5 Video Input/Output – Timing tab