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Arrakis Systems X-mixer-14-22 Operations Instructions Page 33

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AUD
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INPUT BOARD ILLUSTRATED ABOVE CONFIGURED WITH TWO MIC CHANNELS AND THREE LINE CHANNELS
SUSTAINED LOGIC
CONNECTOR
MIX MINUS
ASSIGN JUMPER
(each channel)
MONITOR MUTING
ASSIGN JUMPERS
AUDIO
TRIMPOTS
2
6
5
4
9
7
8
1
3
MONO MIC INPUT CONNECTOR
MIC LEVEL IN & LOGIC
GND
NC
CH ON
IN(-)
-VDC
TB
IN(+)
NC
NC
1)
2)
3)
4)
5)
6)
7)
8)
9)
REMOTE CH ON
REMOTE START (CH2-5)
SHIELD GROUND
TALKBACK LOGIC
-VDC FOR CH ON ONLY
MIC (-) AUDIO INPUT
REMOTE START (CH2-5)
NC
MIC (+) AUDIO INPUT
PIN
FUNCTION
Unless specified differently upon order, channel one will be a mono MIC channel and the remaining channels will be
stereo line level channels. Channels cannot
be converted from mic to line in the field. Upon initial order, any of the
channels can be specified mic or line. Additional channels may be converted to MIC by contacting
Arrakis service.
a) LEVELS
The mic trimpot will adjust gain by roughly 30dB . The trimpots are factory set for -55dBu input levels.
b) INPUT IMPEDANCE
The
1200 mono mic inputs are
high impedance active
balanced design
(>1,000 ohm
input impedance). A parallel
resistor may
be required
across the mic Input to match
the mic
impedance. Refer to
instructions For your specific
mic.
c) CONTROL LOGIC
1) REMOTE CH ON
Connect pin 1 to pin 5 to turn
the MIC channel ON.
The
channel will turn off when the
pins are
disconnected.
2) REMOTE START
(50 mA max) is
provided on channels 2
through
5 on each Input
Board The first channel does
not have a start relay.
3) TALKBACK LOGIC
Connect pin 4 to pin 3 to
provide talkback from the
MIC channel to the monitors.
4) SUSTAINED LOGIC
A
sustained collector transistor
drive to -VDC is
provided for
channels 2 through 5,
although
not channel 1.
Refer to Section 3-8 for
detailed
information. If tally
indication is needed for
channel 1, connect pin 1 to
ground through an
LED,
which will light when the
channel is ON.
d) MIX MINUS
The channel is assigned to
the MIX MINUS
bus when the
MIX MINUS jumper is in
place.
Typically
,
a telephone
channel is NOT assigned
to
the MIX (-) bus. Activation is
with the AUDITION
bus.
e)
MONITOR MUTING
The jumper will assign the
channel to the mute bus
Arrakis Systems, inc. --- 6604 Powell st., Loveland, CO 80538 --- 970-461-0730 --- www.arrakis-systems.com
INSTALLATION PROCEDURES
MONO MIC INPUTS
3-6)
3.17
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