Extron Electronics DMP 128 User Guide - Manual (Page 85)

Extron ExP Bus
Using the Extron Expansion port (EXP), two DMP 128 units can be connected together for
bi-directional communication of 16 channels of audio.
The expansion bus mix matrix can route any or all of the mic/line inputs to any or all of
the expansion outs (1 through 8). In addtion, there are eight channels (expansion outs 9
through 16) directly connected to the virtual bus returns.
connecting the ExP Ports
Minimal setup is required for EXP port communications. One DMP 128 must be set as the
Primary Unit, and the other as the Secondary Unit to synchronize the sampling clocks of
the two units. This has no bearing on how audio is transported from unit to unit, making it
unimportant which unit is set to primary.
notE: You can connect a DMP 128 AT to a non-AT unit by the EXP ports, however
be aware that the AT unit defaults to the primary unit and cannot be changed.
You
cannot connect a DMP 128 AT model to another AT model by the EXP ports
because there is no option to set one as primary and the other as secondary as
required.
to enable the expansion bus between two units:
The EXP bus requires one device be configured as the primary unit and the other as the
secondary unit. The tools menu is used to configure the connection.
1. Power on both units. Open DSP Configurator and connect Live to the first unit.
From the main menu, select Tools>Expansion Bus>Primary Unit.
A checkmark appears beside the active unit.
Figure 48. Expansion Bus Unit Selection
2. Select Tools>Connect to Device and connect Live to the second unit.
3. Select Tools>Expansion Bus>Secondary Unit.
A checkmark appears beside Secondary Unit.
DMP 128 • Software Control 79