HD24/96 Technical Reference | 97 |
An example of how two HDRs can be synchronized to a VTR using video is shown below:
Video / Word Clock
Generator
Blackburst | Blackburst |
Blackburst
Video Slave |
| Video Slave |
|
VTR
Video Slave
In this setup each of the three devices is a video slave to the master video generator. This setup works well when digital audio is signals are NOT connected between the digital audio devices, but will not work when the digital audio signals are connected between the devices. The setup shown below illustrates this very common mistake.
Video / Word Clock
Generator
Blackburst | Blackburst |
Blackburst
VTR
Video Slave
Digital Audio
Video Slave | Video Slave |
When digital audio signals are connected between digital audio devices it is imperative that their clocks be synchronized to a common word clock source, regardless of whether or not video synchronization is involved.
Digital audio devices expect to receive digital audio signals within a certain “window” of time relative to the start of the word clock signal. If it receives them outside the time window, the data may not be read properly and you get a “pop” in your audio. Video signals do not