4004-dva.ib.rev0.doc
Page 6 of 9
15/10/2007
Installation
Pre-installation:
Handling:
This equipment may contain or be connected to static sensitive devices and proper static free handling precautions
should be observed.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
Power:
AC mains supply: Ensure that operating voltage of unit and local supply voltage match and that
correct rating fuse is installed for local supply.
DC supply: Ensure that the correct polarity is observed and that DC supply voltage is maintained
within the operating range specified.
Earthing:
The earth path is dependent on the type of frame selected. In every case particular care should be taken to ensure
that the frame is connected to earth for safety reasons. See frame manual for details.
Signal earth:
For safety reasons a connection is made between signal earth and chassis earth. No attempt should be
made to break this connection.
Installation in frame or chassis:
See details in separate manual for selected frame type.
Ensure that the front panel slide switch is in the NORMAL position for correct operation with ASI signals.
LK3 and LK4 set the PLL lock frequency of U3. LK3 is used to switch between 270 Mb/s (link closed) and 360
Mb/s (link open). LK4 is not fitted, it may be fitted if operation at 143 Mb/s or 177 Mb/s if desired.
LK3 RATE
SELECTED
Closed 270
Mb/s
Open 360
Mb/s
Link LK2 sets the operation of RL2 contact set, the position closest to the board edge is the normally closed
position which will give a contact closure to ground on a signal or power failure, this is the preferred position for
common alarm circuits from a number of units.
The presence of the in5 Vdc supply is indicated by the front panel LED (green).
