AUX 1-2 PRE/POST SWITCH
FUNCTIONS AND CONTROLS
OPERATIONAL DESCRIPTION
Connect a signal to an I/P module via the female x-l-r socket on the back of the rack.
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CHANNEL LEVEL
CONTROL
ILLUMINATED EQ
BYPASS SWITCH
GENERAL DESCRIPTION
The Ocean Audio 500 Series Input module when used in conjunction with the Ocean
Audio Output module, makes a powerful mixing console for the 500 Series rack system.
Any number of Input Modules can be combined to make a comprehensive, fully
featured mixer.
The module should be carefully slotted into the appropriate position of any 500 Series
rack.
By means of the ribbon cable supplied, connect it to another I/P module or the O/P
module. Connectors are provided on both sides of the I/P and O/P modules so they
can be connected in any configuration.
The rack can now be powered up.
The following procedures should be carried out without power applied to the
rack.
Connect a line level signal to the appropriate female x-l-r on the back of the rack.
Depressing the ‘SOLO’ (black button) will make it possible to monitor the signal from
the module selected in isolation from all other I/P modules. The ‘PAN’ control will place
the signal in the stereo perspective. The red LED next to the solo master control on the
O/P module will flash and the solo signal will be indicated on the bargraph meters.
SIGNAL FLOW DIAGRAM
Make sure that all controls are in their minimum (anti-clockwise) or centre detented
positions.
0dB
HIGH/LOW
SHELVING
EQ
+10
-20
DIRECT O/P
PRE/POST
+6dB
0dB
LEVEL PAN
MUTE
MASTER BUSS LEFT
MASTER BUSS RIGHT
SOLO BUSS LEFT
SOLO BUSS RIGHT
AUX 1 BUSS
AUX 2 BUSS
AUX 3 BUSS
AUX 4 BUSS
AUX 1 LEVEL
AUX 2 LEVEL
AUX 3-4
LEVEL AUX 3-4
PAN
0dB
0dB
INSERT
INPUT
OUTPUT
AUX 1
PRE
AUX 3-4
PRE
AUX 1-2 LEVEL CONTROL
AUX 1-2 PAN
AUX 3-4 PRE/POST SWITCH
AUX 3-4 LEVEL CONTROL
AUX 3-4 PAN
SIGNAL LEVEL INDICATORS
ILLUMINATED CHANNEL
MUTE SWITCH
ILLUMINATED SOLO
SWITCH
CHANNEL PAN
HIGH/LOW
SHELVING EQ
Each module provides level control and pan to a master left/right output group, high/
low shelving equaliser with bypass switch, four auxiliary sends, solo switch, mute and
signal level indicators.
The line input is balanced and if an unbalanced signal is connected, the negative
(pin 3 of the x-l-r) signal should be connected to ground.
The ‘LEVEL’ control (red knob) should be advanced until the green ‘-20’ LED
illuminates. It should be advanced further to achieve a suitable level on the O/P
module bargarph display. Please refer to the O/P module operating instructions for
further information on setting the master output levels. The ‘PAN’control (yellow knob)
can be turned left or right according to how you want the signal to appear in stereo.
Depressing the illuminated ‘EQ IN’ (blue button) will put the high/low shelving into
circuit. The high and low frequency level controls can now be adjusted to provide the
required amount of frequency correction. Depressing the ‘EQ IN’ button will allow
comparison between the equalised and non equalised signal.
Depressing the ‘MUTE’ (red button) will mute the signal output and solo feed.
Turning any of the ‘AUX LEVEL’ controls will send a separate signal to any of the four
auxiliary send busses. They are divided into two stereo pairs. Auxes 1 and2 are
controlled by a level control and pan with a pre/post switch and auxes 3-4are another
stereo pair with a pre/post switch. The ‘PRE’ position is useful for using an auxiliary as
a headphone mix as it is independent of the level control and mute.
A further feature are the two switches that can be found on the main printed circuit board.
In normal operation (’INSERT’) switch undepressed, the rear male x-l-r provides a direct
channel output. This can be selected pre or post the level control and mute via the ‘DIR.
O/P’ switch. When the ‘INSERT’ switch is depressed the output x-l-r becomes an insert
send and return. Signal is sent on the positive pin of the x-l-r, pin2 and returned on pin3.
