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5
RJ-XLR Installation and Operation Manual
INSTALLATION
Installation/Operation
Physical Properties:
1-RU, 19.00" x 3.00” x 1.75" (WDH), rack mount painted alu-
minum panel with printed circuit board.
Chassis Ground Screw:
One of the three #4-40 sized chassis ground screws,
labelled MH1, MH2, and MH3 respectively, should be tied to the station (house) or
system ground.
Ground Lift Jumper Settings (JP1/GND Lift)
The Ground Lift Jumper, labelled JP1 on the printed circuit board, allows you to
configure how the signal ground is connected to chassis ground:
Direct = Signal ground (COM) is directly connected to chassis ground. (Factory
Default)
Cap = Signal ground (COM) is connected to chassis ground thru a .01 uF capacitor.
Use this if you are experiencing ground loops.
Float = Lifts/disconnects signal ground (COM) from chassis ground.
Stereo Connections
The XLR jacks on the RJ-XLR can be used as L/R analog stereo pairs where XLR
jacks 1 (1 LT) and 2 (2 RT) are a pair, 3 (3 LT) and 4 (4 RT) are a pair, etc. Each pair
is connected to its own stereo RJ45 audio jack labelled Stereo 1/2, Stereo 3/4 etc.
AES/Mono Connections
When stereo pairs are not needed, or AES/EBU signals are being used, the XLR
jacks can be used as discrete AES or mono connections. Each XLR jack is connect-
ed to its own RJ45 jack, labelled AES 1, AES 2, etc. following the standard RJ45
audio pinout for AES signals where the signal is connected to left channel pins of
the RJ45 jack.
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