Pittsburgh Modular structure 344, Manual

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4. Structure 344 Utility Bridge Internal Signal Routing
The Structure 344 Utility Bus utilizes flexible internal connections to simplify patching and extend the functionality
of the Utility Bus. To modify the internal routing or to create something completely new, all of the internal routing
can be bypassed using the jacks. This allows total patching freedom without the constraints of a fixed signal flow.
Most internal connections are made using switched jacks. A switched jack allows the internal signal path to be
cut when a patch cable is inserted. A simple example would be Input 1 of Voltage Controlled Mixer Bus A.
Internally, the output of Input 1 is sent to the Voltage Controlled Mixer where it is mixed with Input 2 and Input 3
and output via the Bus outputs. When a patch cable is plugged into the Input 1 output, that patch cable breaks
the connection to the mixer thus removing it from the Bus A outputs and creating a single channel attenuverter.
The internal signal routing of the Utility Bus is clearly marked on the panel using arrows and lines pointing toward
the signal destination.
Plugging a patch cable into an internally patched input jack will override any
internal patching allowing for full patching flexibility.