C
HEETAH
864XR
V
IDEO
M
ATRIX
S
WITCHER
Publication 81-9059-0595-0, Rev. C
October 2010
Proprietary Information of
PESA
2-4
2.2
R
EVIEW OF
C
ORE
S
YSTEM
C
OMPONENTS
The 864XR Frame is configured using combinations of the following Core System Components:
Input Circuit Card Assembly
Matrix Circuit Card Assembly
Output Circuit Card Assembly
Power Supply Module
Control System (System Controller CCA and Frame Controller CCA)
Each core component is identified and a very brief look at the function of each is provided in the
following paragraphs.
2.2.1
I
NPUT
C
IRCUIT
C
ARD
A
SSEMBLY
As the name implies, the Input Circuit Card Assembly (CCA), often referred to simply as the input card,
is the entry point for video signals into the routing switcher matrix. Each input card accepts up to 16
video input signals from various sources. There are six input card variations in the Cheetah Series
product line, to accommodate different input signal types.
Each input card, regardless of signal type, contains the cable equalization circuitry, buffer amplifiers
and signal drivers used to condition the incoming signal prior to entering the switching matrix. Each
input card also contains circuitry to monitor the status of the input channels, power rails and other
operational functions.
Input cards are physically attached to the rear panel of the chassis frame and provide the input
connectors for attaching signals to the switcher. Each card is equipped with two status LEDs on the edge
of the assembly close to the bottom input connectors. The user can very quickly perform a visual
assessment of the status of the input cards by observing the state of the LEDs.
2.2.2
M
ATRIX
C
IRCUIT
C
ARD
A
SSEMBLY
Each Matrix Card is where the actual crosspoint switching function takes place. In all Cheetah
variations, the matrix cards are installed inside the chassis frame and are accessible by opening the front
access door. Each card is equipped with LEDs on the assembly edge so that the user can quickly assess
the status of each matrix card in the system with a visual inspection.
2.2.3
O
UTPUT
C
IRCUIT
C
ARD
A
SSEMBLY
The Output Card is the exit point for video signals leaving the routing switcher and each card provides
up to 16 video output channels. There are seven output card variations to accommodate different signal
output types.
Each output card contains the necessary channel combiner circuitry, buffer amplifiers, re-clocking
circuitry and driver amplifiers to generate the signal output for each channel. Voltage comparators
monitor the status of the power rails. On-board programmed logic circuitry interprets data from the
comparators along with data relevant to the status of the output channels and other card operational
functions to provide a real-time status monitor as to the health of each output card.
Output cards are physically attached to the rear panel of the chassis frame and provide the connectors
for accessing the signal outputs from the switcher. Each card is equipped with two status LEDs on the
edge of the assembly close to the bottom connectors. The user can very quickly perform a visual
assessment of the status of the output cards by observing the state of the LEDs.
