Compex Systems Professional Portable Mixing Console SONOSAX SX-S User Manual
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6.3 The Boom Box
The Boom Box connects to the SX-S extension module via a 2-pair cable with 6-pin Neutrik connectors. On the
Boom Box is a boom-operator's headphone Jack (6,3mm, stereo), a standard XLR female plug to connect to a
talkback mic, or to the Boom mic if used with Y-splitters on the SX-S end. A button provides the boom operator
with the ability to call the mixer operator. A LED indicates to the boom operator that the tape is rolling.
6.4 Metering
The two high quality meter movements show the program level's Left and Right channels. The upper meter shows
the Left channel and the lower shows the Right channel. The VU-peakmeter switch selects whether the meter
movements are in VU-meter or in peakmeter mode. The mono-stereo switch selects between mono and stereo
operation. In mono mode the upper or left meter functions as a phase correlation meter, while the lower or right
meter always indicates the greater of the two signals L or R. LEDs indicate which channel is greater. The meters
can be backlit. A three position switch selects Low, High and Off.
6.5 Mixer Operator's Monitor
The mixer operator's monitoring headphone amplifier is on the left hand side of the module. A selector switch
chooses between the different sound sources: Off, Left, Right, Mono, Stereo and Auxiliary. A switch selects
between normal or MS-decoded monitoring. In MS-mode the M-(left) channel is applied to both L & R channels in
phase and the S-(right) channel is applied in phase to the left channel and out of phase to the right channel. The
ratio M to S is fixed (this decoder is only for monitoring and does not affect the main mix).
The phones potentiometer controls the headphone level for the mixer operator. The Mic potentiometer controls the
level of the operator's slate microphone. The SX-S has a built-in slate microphone that is located next to the
Stop/Roll switch on the module. An external slate microphone can be connected to the extension module. Many
operators prefer to use a slate microphone on their Headsets, which guarantees them more freedom while
working. If you have been using the internal slate microphone and want to use an external slate microphone, you
should ask your dealer for the external slate mic input. An internal jumper, JP-1 (on the operator ext. Module PCB),
lets you select 48 volt phantom power operation on the slate microphone. Sidetone is available on the monitor and
is adjustable by means of an internal trimmer (P-3). Sidetone is either pre mic level or post mic level. (Jumper-4 :
pos. 1-2 pre, pos. 2-3 post).
6.6 Boom Operator's Monitor
The boom operator's monitoring headphone amplifier is on the right hand side of the module. A selector switch
chooses between the different sound sources: Off, Left, Right, Mono, Stereo and Auxiliary. A switch selects
between normal or MS-decoded monitoring. In MS-mode the M-(left) channel is applied to both L & R channels in
phase and the S-(right) channel is applied in phase to the left chanel and out of phase to the right channel. The
ratio M to S is fixed (this decoder is only for monitoring and does not affect the main mix).
The phones potentiometer controls the headphone level for the boom operator. The Ret potentiometer controls the
(Return) level of the boom operator's talkback microphone. The boom operator's talkback microphone connects to
the boom box or, with the necessary Y-cables on the SX-S side, to a microphone transmitter or any other cable.
An internal jumper, JP-1 (on the Boom ext module PCB), lets you select 48 volt phantom power operation for the
boom operator's tbk mic. Sidetone is available on the monitor and is adjustable by the means of an internal
trimmer (P-3). Sidetone is either pre mic level or post mic level. (Jumper-4 : pos. 1-2 pre, pos. 2-3 post).
6.7 Communication
The SX-S Extension Module has comprehensive communication features. The mixer operator can talk to three
different destinations and can receive calls from the boom operator.
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SONOSAX SX/S USER MANUAL
26.08.2004
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