Installation
In rear screen applications where space behind the projector is limited, a mirror may be | Folded Optics | |||||
used to fold the optical path, as shown in Figure |
| |||||
mirror must be accurately set. If you are considering this type of installation, contact your |
| |||||
dealer for assistance. |
| |||||
|
|
|
|
|
|
|
Screen |
|
| Mirror |
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Figure |
|
Due to its extraordinarily high level of video processing performance, the DHD Controller | Audio/Video |
may distribute video signals with a perceptible level of audio latency. In order to easily | Synchronization Issues |
solve this issue, Runco recommends using the DHD Controller with a |
|
receiver that has the ability to effectively synchronize audio and video signals. |
|
Most mainstream audio receiver/switchers have the ability to synchronize the audio and |
|
video to the Advanced Television Systems Committee (ATSC) prescribed tolerances. |
|
According to the ATSC, the sound program should never lead the video program by more |
|
than 15 milliseconds, and should never lag behind the video program by more than 45 |
|
milliseconds. |
|
In addition, many A/V receivers introduce additional latency that needs to be |
|
compensated for during the installation. Table |
|
latency given different signal input timings. |
|
Table 3-5. Possible Audio Latency for Various Input/Output Timings
Input Timing | Possible Audio Latency (milliseconds) |
|
|
480i | 133 |
|
|
480p | 83 |
|
|
576i | 160 |
|
|
576p | 100 |
|
|
720p/50 | 100 |
|
|
720p/60 | 83 |
|
|
1080i/25 | 160 |
|
|
1080i/30 | 133 |
|
|
1080p/24 | 125 |
|
|
1080p/50 | 80 |
|
|
1080p/60 | 67 |
|
|
Runco | 25 |