Grass Valley 8985FS v.1.3.2 - Manual (Page 49)

8985FSP/FS — Instruction Manual 49
Configuration
Timing Status
In the Timing Status table, Total Video Delay is reported through the module
in numerical format in frames and in microseconds as shown in the
example in
Figure 23 on page 50 .
The Delay Wrap Position indicator will display with a blue bar, the fraction of
the final frame of actual video delay through the frame sync. It will not
indicate if multiple frames have been selected with the Multi-Frame Delay
control.
For example, with 1080i video and Minimum Delay Mode not selected, if
600 lines plus 5 frames of delay is entered by the user, that actual delay
through the module will be anywhere from about 6 to 7 frames depending
on the following conditions:
• If the module is in Delay (Input-Timed) Mode, the delay through the
module will be about 6.5 frames, and the Delay Wrap Position will be
at about 50% of full scale.
• If the module is in Frame Sync (Genlock) Mode, the delay through the
module will be about 6.5 frames if the input video has zero delay with
respect to the genlock reference frame position, and the Delay Wrap
Position will be at about 50% of full scale. As this input video delay
with respect to the genlock reference frame position is changed from
-0.5 to +0.5 frame periods, the delay through the module will change
from about 6 to 7 frame periods, with the Delay Wrap Position changing
from about 0 to 100% of full scale.
In summary, the Electrical Length of the module can be estimated as the fol-
lowing:
• 1 frame minus 5 lines (Minimum Delay Mode not selected), or
• 150 pixels (Minimum Delay Mode selected) + Multi-Frame Delay +
Delay Wrap Position (% of full scale) X (1 frame period).