C
HEETAH
864XR
V
IDEO
M
ATRIX
S
WITCHER
Publication 81-9059-0595-0, Rev. C
October 2010
Proprietary Information of
PESA
2-5
2.2.4
P
OWER
S
UPPLY
M
ODULE
Cheetah video routing switchers use common 600 Watt power supply modules that provide a fully
regulated source of +28 VDC @ 22A for powering system components. The number of power supply
modules used in a frame is dependent on several factors including the number of input, matrix and
output cards required for system capacity and whether or not power redundancy is desired. Up to 8
Power Supply Modules may be installed in the 864XR Frame.
All of the power supply modules are physically and electrically identical. Each module is “hot-
swappable” for easy removal and replacement without any disruption of switcher outputs. Circuitry
internal to the power supply continuously monitors the operational parameters, output voltage and
current level and the module operating temperature. Three LED display devices on the front panel of
each module allow the user to quickly perform a visual assessment of the status of each supply module
by observing the state of the LEDs.
2.2.5
C
ONTROL
S
YSTEM
Every switcher configuration requires a Control System. In the Cheetah family there are two core
components of the control system that reside within the chassis frame: the System Controller Card and
the Frame Controller Card.
The System Controller Card resides in the matrix switcher frame, however the term System Controller
refers collectively to the System Controller CCA and its associated board-resident firmware and a
software application that runs on a Microsoft Windows based PC platform. In the Cheetah product line
there are two variations of System Controllers: the 3500PRO and the PERC2000. Regardless of which
control system is used (3500 or PERC), at least one system controller card must be installed in the
chassis frame. Each chassis frame can support up to two system controller cards although only one
controller card is required. A second system controller card may be installed for redundancy capability.
The Frame Controller Card also resides in the matrix switcher frame. Just as with the system controller
card, each chassis frame can support up to two frame controller cards, although only one is required. A
second frame controller card may be installed for redundancy capability.
Consider the System Controller to be the master overseer of the entire system. The system controller
card communicates bi-directionally with the frame controller circuitry. Think of the Frame Controller
as a slave that is subservient to its master – the System Controller. The Frame Controller circuitry
orchestrates all system switching commands and all other control functions for the entire switcher
frame. It is the job of the System Controller to keep the entire system running as it is programmed to
do. The System Controller provides programming functions and interface functions to various types of
control panels that may be used by facility operators to control operations of the entire switching
system. Also, the system may be operated from a Windows based PC interfaced to the system
controller and running the controller software application.
2.2.6
B
ACKPLANES
Note in Figure 2-1 that there are two power supply modules residing on each power supply backplane
along with an 8-position DIP switch; and four matrix cards residing on each matrix backplane along
with six rotary switches (S1 thru S6). In addition to the switches on the backplanes, also note the ten
rotary switches used for chassis strobe configuration.
Figure 2-2 illustrates the rear panel of the chassis frame where the input and output cards are installed.
Note in this figure that up to four input or output cards may reside on each I/O Backplane and that each
backplane contains an 8-position DIP switch.
