Grass Valley PDR v.2.1 - Manual (Page 38)

Chapter 2 Using the Profile Configuration Manager
22 Profile Family
Internal Reference Timing
Use the Field, Line, and Fine entries to adjust the internal timing relative to the
reference input. Changing this setting affects all system timing, including all
output timing and the input synchronized timing window. Click Default to
return to the default values (0,0,0).
NOTE: In order to properly time the disk recorder into the system, the
Internal Reference Timing should only be changed if the
downstream timing requirements cannot be met using the Video
Output Delay Adjustment.