Specifications

2-20 888-2500-001 5/2/13
WARNING: Disconnect primary power prior to servicing.
DAX-1/DAX-3
Section 2 Installation
2.3.6.2 Basic Connections
The following procedures refer to the External I/O board which is located behind the
Controller/External I/O panel on the front of the DAX. To perform these connections
this panel will need to be removed.
NOTE:
It is recommended that any remote control or status connections be made only
after the transmitter has been initially turned on and operation verified. However,
the Interlock loop will need to be satisfied in order for the DAX to be able to be
turned on (See "2.3.6.5 Interlock Loop Connections" on page 2-22).
NOTE:
For RFI rejection, torroid cores are provided for I/O cabling coming in to the
DAX. Route all audio cables through (and around one time) one core. Route all
command and status cables through (and around one time) the other provided
core.
2.3.6.2.1 Analog Audio
Once the analog audio cable is exiting into the DAX, connect it to the J13 WAGO
block, ANLG AUDIO, on the External I/O board: Audio(+) to J13-1, Audio(-) to J13-2,
and ground to J13-3.
2.3.6.3 Digital Connections
For IBOC operation, the following connections and settings will need to be made. Once
these are complete the DAX will need to be put into IBOC mode via the front panel
control (see "3.3.4 Digital Mode Selection" on page 3-8).
2.3.6.3.1 Digital Phase Input
Route the IBOC phase output (from A11J5 AM PHASE OUT on the DEXSTAR
exciter) to the J14 BNC connector, DIGITAL PHASE INPUT, on the External I/O
board.
2.3.6.3.2 Digital Magnitude Input
Route the IBOC Mag cable (from A13J14 AM MAG OUT on the DEXSTAR exciter)
to the J15 WAGO block, DIGITAL AM MAG on the External I/O board: MAG(+) to
J15-1, MAG(-) to J15-2, and ground to J15-3.