DDA-4010
IRT Electronics Pty Ltd | www.irtelectronics.com
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Revision 01
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 Inputs & Outputs:
For use with supplied standard rear assembly (ZDA-4010) or optional relay bypass rear assembly (ZDA-4010RL).
The DDA-4010 can be configured as a single 1 IN, 8 OUT distribution amplifier, or as a dual 1 IN, 4 OUT distribution
amplifiers as described in the
Configuration
section of this handbook. If set up for a 1 IN, 8 OUT distribution
amplifier, either input can be configured as the primary input. The other input is not used except when the
automatic changeover function is enabled, in which case this becomes the secondary input. See the
Operation
section of this manual for a complete description.
Inputs, Outputs and front panel monitoring ports are 75 Ω BNC type for connection with high quality 75 Ω coaxial
cable. Inputs are self-terminating.
An optional relay bypass rear assembly (ZDA-4010RL) is available where the inputs are outputted to one of the
respective outputs (OUT 1A for Input A, and OUT 1B for Input B) on loss of power or removal of the card from the
rear assembly itself. The bypass relay is suitable for all specified signals up to 3G-SDI. Note however that the cable
equalisation at the 3G/HD-SDI rates and the return loss at the 3G-SDI rates are reduced through these relays. Note
also that if operating in the 1x8 mode, if anything is connected to the secondary input this too will be switched to
one of the outputs on loss of power or removal of card.
