Cheetah 64NEX, Руководство пользователя

Страница: 37 / 66

Cheetah 64NEX Digital Video Router
Publication 81-9059-0685-0, Rev. A
March 2011
Proprietary Information of PESA 6-4
2. Push and hold the latch on the lower front of the power supply in the full-upward position.
3. Once the latch is pushed upward and held, use the unit handle and carefully pull the power
supply out of the equipment chassis (the unit is held in place by connector plugs and
requires a slight forceful-pulling motion to separate it from the connectors). Repeat for
each power supply that you need to remove.
6.2 I
NSTALLING
I
NPUT
B
UFFER AND
O
UTPUT
C
OMBINER
C
ARDS
Install the input/output cards as follows (see Figure 6-3):
F
IGURE
6-3 Input/Output Signal Connectors (rear view)
1. Align the first input/output buffer card with the card guides in the chassis.
2. Carefully insert the input/output buffer card into the chassis until the screw makes contact
with the backplane. This will align the card with its’ corresponding backplane contact block.
3. Secure the screw using a 5/16” hex socket or a flat head screwdriver. As the screw is
tightened, the card is automatically seated into the contact block on the backplane.
4. Repeat the above steps for each additional input/output buffer card.
5. Reverse the order for removal of the card.
6.3 V
IDEO
M
ATRIX
(C
ROSSPOINT
) C
ARD
The digital matrix card accepts video sources (143Mbps to 3Gbps) from the input buffer cards and provides
output signals to the output combiner cards. All switching is done by a special purpose device, controlled
by commands from the matrix frame controller. Any input signal may be routed to any or multiple output
channels of the card.
There are six LEDs located on the front edge of each matrix card that provide a visual indication of the
operational status of the card; these are identified by Figure 6-4. Table 6-2 lists the possible states and
interpretation data for the LEDs.
Figure 6-5 is a block diagram of the digital matrix card. Paragraph 6.4 presents a narrative description of
the circuit functions shown on the block diagram.