Oxygen 3 - Input Module Description; Channels 1 To 6; Channel 1 To - Axel Oxygen 3 Operating Manual

8 OXYGEN 3 – INPUT MODULE DESCRIPTION

8.1 CHANNELS 1 to 6

A/B SWITCH: The B SEL switch selects the INPUT B socket when depressed and the
INPUT A when released. A LED glows green when the INPUT B is selected. Input A is set
for Micro level on Channels 1 to 3, for Line level on the Channels 4 and 5 and for Phono
level on the Channel 6 if not otherwise indicated.
GAIN: The GAIN potentiometer provides a variable 24dB range (from -12 to +12dB) gain to
match the connected source to the internal 0 dBu operating level
This knob allows you to match the input level to suit a wide variety of professional and
semiprofessional sources. Start with a low setting, especially for professional equipment,
checking the level on the meters using PFL, and increase it if you cannot reach an average 0
dB level with the fader at maximum (refer also to section 10.1).
EQUALISER: The Equaliser comprises three sections. The upper control provides
H.F.(treble) boost and cut of + 6 / -12 dB at 13 kHz, and the lower control provides L.F.
(bass) boost and cut of + 6 / -12 dB at 60 Hz.
The centre knob is arranged as MID frequency section, with a cut/boost control (lower knob)
of + 6 / - 12 dB for a frequency range from 80Hz to 10 kHz.
Set the cut/boost control of each section to the centre-detented position when not required.
MASTER: The input channel signal may be routed to the main Stereo MIX (MASTER L / R)
by pressing the Master switch.
There is a green LED inside which will illuminate accordingly.
PFL: Stereo pre-fade listening PFL button (operated only in latched mode) allows pre-fade
listening (post-EQ) of the channel with the fader closed. Even when the channel is active, the
PFL system is active. It always operates in the ADDITIVE Mode (i.e. You can listen to one or
more PFLs at the same time by pressing one or more PFL keys).
To listen to a PFL:
1) select the PFL key on the input channel to be monitored
2) release both the MASTER and EXT-IN buttons on the MONITOR section (ref. to section 11.3)
SLIDER: ALPS N-type 90° ultra smooth 100 mm sliders are provided on series.
The scale shows the attenuation. Normal operating position is at the top '0' mark, providing overall 0 dB of
gain. On request, to notify at order, ALPS K series sliders can be also fitted. The benefit is longer fader
life.
CHANNEL 1 (labelled MicDJ / Line) may be regarded as a 'priority' channel: the POST-EQ (and pre-fader)
signal is alwais internally routed to the TalkBack circuitry and to the Telephone channels for 'private' (off-air)
communications with the callers. The Post Fader, channel Master output is also routed to the TalkOver
section for automatic voice/music mix. We therefore suggest to use the First Channel as a 'micro' channel
connected to the DJ / Announcer microphone.
OXYGEN 3 – INPUT MODULE DESCRIPTION
E N G
Pag. 11