User manual

  1  '   ) 8 3 8 )   ) 8 3  &     5  
;
;;
;
Audio Connections
The second connection is audio input or output. Each audio connection on the CAB 4n is a single
three-wire, balanced analog circuit. The connections are identical for both microphone and line
input plus line output cards. When using an AEC card make sure there is at least one line output
card loaded in the CAB 4n for signal reference purposes.
As with any electronic connection, care should be taken to ensure that the termination is solid.
There should be no stray wire strands, kinks or nicks in the wire jacket for a proper termination.
And as always, audio connections should be made with high quality shielded wire.
RS-485 Connections
The third connection is the RS-485 Serial Port. All CAB Series products include this powerful
feature that enables you to “bridge” serial data between CAB locations on the CobraNet™
network. You can think of this as a kind of “sub-network” that travels across the CobraNet
infrastructure independently of the audio data. This feature has many uses, but is primarily used
to transport control data. The data format is Half-Duplex, two-wire, balanced. Again, care should
be taken to insure that your termination is correctly installed and high quality shielded wire
should be used.