Grass Valley PDR100 - Manual (Page 69)

What if the Inputs Cannot be Timed
PDR100 Installation 3-45
In the example, the PDR100 has two input sources: an analog composite camera feed
and a digital component synchronizer feed. Notice that the Reference House Black is
the Genlock signal for both the PDR100 and the SPG 422 (a sync pulse generator).
Also notice that the Reference House Black signal is not be used directly as the
genlock signal for PDR100 input sources.
Each input source has its own Genlock source (from the SPG422) that is advanced
from the Reference House Black. The analog composite is advanced 7.5 lines and the
digital component is advanced 4 lines.
NOTE: The input timing requirements for each board are different:
Analog Compositeadvance 7.5 lines
Digital Componentadvance 4 lines
This is the amount of advance required to get the input into the Auto-Timing window.
Once the input is within the Auto-Timing window, then the PDR100 can
automatically lock to the input signal. This allows all signals through the box to be
correctly timed into the system. (Even inputs operating in E-to-E mode.)
What if the Inputs Cannot be Timed
Operate with Auto-Timing Disabled
If you do not have access to Reference House Black with varying amount of advance,
you have a few options, depending on what operations you need to perform.
If you just want to record material and play it back at a later time, this option works
fine. But if this input is also being fed directly through the PDR100 (operating in
E-to-E mode, feeding this signal to another channel, etc.), the resulting output will not
be correctly timed.
Adjust the Genlock Timing
This will only work if you only have one type of input. You can adjust the Genlock
Input Timing (delay 4 or 7.5 lines) to move the genlock timing until is within range
to lock onto the input. This is not recommended. Remember, that the PDR100 is
designed so that output is timed with zero delay to the genlock. If you use this option,
then the output is delayed either 4 or 7.5 lines from the reference. You would then
need additional equipment to advance the output signal (PDR100 only offers a
two-line advance for its outputs) so that it will remain properly timed into the system.