Getting Started
ECO422D SD/HD Changeover Unit Instruction Manual
1- 9
Analog black burst
Analog black burst
Analog black burst
Serial digital video
Analog black burst
Serial digital video
Serial digital audio
Analog black burst
Serial digital video
Serial digital audio
Analog black burst
Analog black burst
Analog black burst
Analog black burst
Serial digital video
Analog black burst
Serial digital video
Serial digital audio
Analog black burst
Serial digital video
Serial digital audio
Analog black burst
Analog black burst
Analog black burst
Analog black burst
Serial digital video
SPG422
Analog black burst
Serial digital video
Serial digital audio
Analog black burst
Serial digital video
Serial digital audio
Analog black burst
Primary
Generator
Backup
Generator
ECO422D
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
Primary
Backup
SPG422
Figure 1- 8: Example of ECO422D connections
There are the several different types of signal checking already available but you
may need to feed a different signal through the ECO422D. This section gives
one example, active analog video.
Active Analog Video.
The ECO422D will pass active analog video by using the no
checking mode, but there will be times when you need to check for the presence
of an active video signal. You have at least two options. First, you can set up a
custom checking level using one of the “user-defined” levels. This is great if you
are always passing color bars or some other test signal where the average picture
level remains constant and never fades to black. If the average picture level drops
below the custom set level then an error occurs, causing the ECO422D to switch
sources. The set level could easily be well above black burst. The second option
is to use the predefined black burst level. This works very well when your goal is
to check for “present/not present” active video. It will accept long periods of
black without generated an error, but it will switch if the signal goes “complete-
ly” away.
Again, to summarize the three options available, if you want active video to pass
through the ECO422D:
Hints on Using the User
Configuration Switches
Содержание ECO422D
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