User`s manual

EAGLE - ANNEX A.6. Installation of the EAGLE as an ISDN hybrid. 71
A.6. Installation of the EAGLE as an ISDN hybrid.
In some cases, the EAGLE audio codec is installed in a radio studio in order to replace an
analog hybrid, as the AEQ TH-02 Ex MkII, for using ISDN lines.
Connection of an EAGLE to an AEQ BC-500 MIXER:
In order to connect an EAGLE to a BC-500 mixer, two BC533 (without internal hybrid) modules
are used. First audio channel input and output will be connected to the first BC533 (Configured
as PHONE 1 bus). Second channel input and output will be connected to the second BC533
module (Configured as PHONE 2 bus).
In order to control the EAGLE hybrid features from the broadcast mixer, the GPIO port will be
used. Programming bridges of the BC533 have to be configured this way:
PDP3: ON
PDP4 and PDP5: OFF (removed)
The following cable diagram will carry control signals:
In this configuration, there are two possible operating ways:
- As two independent lines: Each EAGLE channel will be controlled by each BC533.
- As MULTIPLEX: By pressing the MULTIPLEX FEATURE in the EAGLE, both ISDN channels
will be mixed together and get into the mixer through the first BC533. The PHONE 1 bus signal
will be sent to both ISDN communications.