DAA-4400
I.R.T. Communications Pty Ltd | www.irtcommunications.com
Page 8 of 14
Revision 02
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.
Signal Connections:
Signal connections are made to the connectors on the selected rear panel of the DAA-4400.
The input signal can be either 75 ohms unbalanced terminating or 110 ohms balanced terminating, the
input
selection
is done be links
SW1, SW2 on the module pcb
near pin 32 of the input connector. Move the links
provided to the 75 or 110 positions marked on the board as required. The input signal is then connected to the
appropriate input connector on the rear panel.
For unbalanced 75 Ω output circuits use the ZAA-4400 rear panel and for balanced 110 Ω output circuits use the
ZAA-4401 rear panel assembly.
The presence of signal at the output of the rear assembly can be monitored using the front panel monitoring BNC
socket provided.
