2 Installation
di
ital
Revision C • 1/04
HARRIS CORPORATION
2-9
Analog Connections
There are no analog interstage patch points
within the BMX
digital
input or output modules.
To use the console with a patch bay, connect the
line level outputs from the peripheral devices di-
rectly to the patch bay. Normal these signals to
the appropriate analog input modules.
Likewise, the BMX
digital
’s analog outputs may
be routed through a patch bay normalled to stan-
dard peripherals such as analog on-air processing
gear, recorders, telephone hybrids, etc.
The Mic Preamp module’s line-level outputs (+4
dBu, nominal, balanced, mono outputs) can also
be routed through a patch bay normalled to an
input module, or to external mic processing.
When a mic processor with only a microphone
level input is used, the microphone is connected
directly to the mic processor, with the processor’s
line-level output either directly connected to an
input module (using the mono wiring pinout
shown below) or through a patch bay normalled
to an input module.
Two-Channel (Stereo)
Line Input or Output — 6-Pin Housing
Pin Signal Description
1 Shield for the left channel, or signal 1
2 Low (- input or output), left channel, or signal 1
3 High (+ input or output), left channel, or signal 1
4 Shield for the right channel, or signal 2
5 Low (- input or output), right channel, or signal 2
6 High (+ input or output), right channel, or signal 2
Single Channel (Mono)
Line Input — 6-Pin Connector
Pin Signal Description
1 Shield (connects directly to the chassis)
2 Low (- input) tied to pin 5
3 High (+ input) tied to pin 6
4 Shield (connects directly to the chassis)
5 Low (- input) from pin 2
6 High (+ input) from pin 3
AUDIO CONNECTIONS
Audio connections take advantage of the three-
pins per row design of the three- and six-pin AMP
MOD IV housings. Three-pin housings are used
for balanced digital connections while six-pin
housings are used for balanced analog connections.
One important exception is the Mic Preamp mod-
ule, which uses three-pin connectors for balanced
analog microphone inputs.
All audio wiring, when plugged into a module
connector, has this orientation:
• The audio shields are on pins 1 and 4 (the
pins closest to the board operator).
• The audio low wires (typically the black
wires) are on pins 2 and 5 (the middle pins).
• The audio high wires (typically the red
wires) are on pins 3 and 6 (the back pins).
For stereo applications, the left channel wires
plug into the left column of pins and the right chan-
nel wires plug into the right column of pins (from
the board operator’s perspective).
When a six-pin input comes from a mono source
(such as an external microphone preamp output),
the left and right inputs should be paralleled to-
gether (pins 1 and 4 tied together, pins 2 and 5
tied together and pins 3 and 6 tied together). If
this is not done, then the module’s mode buttons
will have to be set for mono operation (see page 3-
5 for L/R Mode information on the Universal In-
put Module).
6-pin
connector
6
5
4
3
2
1
Pin numbering shown from the wire insertion end,
oriented from the board operator’s perspective.
Pin Numbers for Analog &
Digital Audio Connectors,
3-pin
connector
3
2
1
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