GRASS VALLEY 8995DNC -, Instruction Manual

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8995UPC/DNC/UDX — Instruction Manual 55
Configuration
Frame Sync Web Page
Use
this
link
The Frame Sync web page provides timing adjustments for horizontal and
vertical timing, multi-frame delay selection, enabling of minimum delay
mode, loss of signal choices, manual freeze mode choices, and a timing
status table for the 8995 module.
Note The controls available on the Frame Sync page depend on the Output Timing
Source selected on the System Config web page.
Timing Adjustment
When no Frame Sync option is present or selected as the reference source,
the module is in line sync mode. The module reference source can be set to
Input
on the System Config web page. Controls available in this mode will
appear as shown in Figure 32 on page 56 .
When the Frame Sync option is present and the
Local, Ref 1
, or
Ref 2
output
timing sources are selected, horizontal and vertical timing adjustments can
be made on the output video as required relative to the external reference
with the controls described below. Refer to
Table 7 on page 60 for the list of
frame sync pixel and line timing adjustment ranges for input to output
video combinations.
•
H Timing (Pixels)
– the horizontal timing can be adjusted in pixels relative
to the external reference.
•
V Timing (Lines)
– the vertical timing can be adjusted in lines relative to
the external reference.
•
Multi-Frame Delay
– this control allows you to add up to 6 frames of delay.
When the H and V Timing controls are set to maximum, the total delay
of the module will be 8 frames (when
Minimum Delay Mode
is not
selected).
Minimum Delay Mode
A Minimum Delay Mode can be enabled to bypass portions of the frame
sync memory to allow an absolute minimum amount of delay through the
module. It is a special mode allowing the user to select a throughput delay
of about one frame when the input is synchronous and its position with
respect to the reference is well known. To enable this mode, check the
Enabled
checkbox. Refer to Figure 34 on page 58 for an example of this set-
ting.
Note Delay can be added when in Minimum Delay Mode without causing video dis-
tortion up to one line short of a whole frame period of user delay. For normal
delay operations, Minimum Delay mode should be disabled.
Refer to Table 9 on page 99 for the delay values for each format.