Imagine communications Selenio 6800 HUC6800, Installation And Operation Manual

Page: 38 / 84

24 HUC6800
+
Installation and Operation Manual
Chapter 3: Operation
Operating Notes
When setting the control parameters on the HUC6800
+
and
HUC6800
+
C, observe the following:
• If you make changes to certain parameters, other related parameters
may also be affected. See
“Cross-Functional Parameter Changes”
on page 35 for more information.
• When you change a parameter, the effect is immediate. However,
the module requires up to 20 seconds to save the latest change.
After 20 seconds, the new settings are saved and will be restored if
the module loses power and must be restarted.
• For proper operation, the output HD standard frame rate should
match or double the reference standard frame rate.
• The manufacturer recommends that you terminate any unused
coaxial output connectors with a 75
Ω
terminator.
Audio and Video Synchronization and Delay
During upconversion, delay is added to the SDI input signal in the main
video processing path. The amount of delay to the primary signal is
dependent upon the type of processing applied to it.
Table 3-1 on
page 25 contains breakdowns of the major video propagation delays
through the video synchronizer and converter blocks.
The SD-SDI input signal is
frame-synchronized to the genlock
reference. Using the Input Frame Delay parameter, you can
compensate for other external processes. The Input Frame Delay
parameter provides a delay range between 0 to 6 frames in one-frame
increments.
The video frame synchronizer (frame sync) on the SDI input provides
synchronization using the following sources:
•
SDI program input timing (Delay Mode)
• Reference timing (Sync Mode)
In Sync Mode , the frame synchronizer automatically detects and locks
to the genlock reference signal for video timing alignment. The frame
synchronizer either drops or repeats video frames to achieve
synchronization.