C
OUGAR
3
V
IDEO
R
OUTER
Publication 81-9059-0660-0, Rev. B
March 2011
Proprietary Information of PESA
4-2
•
All-level, audio-follow-video (AFV) switching
•
Breakaway switching on up to 8 switching levels
•
Operate in hot-take or preset panel modes
•
Destination protect and lock features
•
Source and destination key channel assignments configurable through Cattrax
•
Single button “Take” for preset switches
•
Illuminated and legendable “soft touch” keys
4.4
I
NTRODUCTION TO
PESA’
S
S
WITCHING
M
ETHODOLOGY
In order to get the greatest functionality from your PNet control panels, there are a few basics of the
PESA router architecture and control system you need to be familiar with. Assume a router installation
in a production facility with multiple signal sources of SDI video and analog stereo audio which we
need to route to multiple destinations. In our example facility we are using a Cougar3 equipped with a
SSC3 controller for video. We also have a stand-alone PESA DRS router under control of the SSC3
controller for routing audio signals and a local PNet control panel on the front of the video router.
Assume one of the program sources in our example facility is a network receiver, we’ll call it NET1,
which provides video and stereo audio signal outputs we need to switch through our router. NET1,
while being identified as a single entity, actually produces three totally independent source signals.
Similarly, if we have a recorder device we’ll identify as a single entity named VTR1 on which we wish
to record a program originating from the device called NET1, we must provide all three of the signals
from NET1 as inputs to recorder VTR1.
It would be possible to individually switch the three signals from NET1 to VTR1 through our router as
single sources to single destinations. We would have to configure an individual source named, for
example, NET1VID for the video signal; another individual source named NET1LAUD for the left
audio channel, and yet another individual source named NET1RAUD for the right audio channel. Then
we would have to take a switch routing NET1VID to the video router output providing a signal to the
video input of VTR1, another switch to route the audio; and you get the idea.
Fortunately, router control systems make it a lot easier to route multiple signals simultaneously. PESA
routers accomplish this by the use of switching levels, components, sources (source groups) and
destinations (destination groups), created and assigned through the controller configuration file.
Loosely defined, a switching level is a grouping of like-signals. Considering our example, we have three
groups of like-signals that we need to pass through our router system: video, left channel audio and right
channel audio; and each of these groups can be configured as a switching level of the router. When we
create the controller configuration file we would define these three switching levels, and for ease of
identification we could name them VID, AUDL and AUDR, respectively.
By defining the switching levels we’ve told the system controller it has three sets of signals to treat as
separate groups. Next, we have to tell the controller where the signals for each level physically enter and
exit the router hardware, i.e., which frame of the router system is carrying the signal, and whether or not
the switching level contains multiple component signals. This is done by defining the components of the
switching level in the controller configuration file. PESA’s control system requires that every switching
level be tied to at least one unique component.
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