Axel Oxygen 5 User manual

Operating Manual
(Rev. 1.3)
Oxygen 5
Broadcast Console
AXEL TECHNOLOGY S.R.L.
Web site:
www.axeltechnology.com
E-mail:
[email protected]

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CONTENTS
1INSTALLATION – MIXING CONSOLE OVERVIEW ......................................................................................4
1.1 INPUT AND OUTPUT MODULES..............................................................................................................................4
2STEREO MODULE .................................................................................................................................................5
2.1 INTRODUCTION ..............................................................................................................................................6
2.2 INPUT A...............................................................................................................................................................6
2.3 INPUT B...............................................................................................................................................................6
2.4 REMOTE INTERFACE.....................................................................................................................................6
2.5 A-B INPUT SELECTOR..........................................................................................................................................8
2.6 GAIN CONTROL..................................................................................................................................................8
2.7 EQUALIZATION SECTION......................................................................................................................................8
2.8 BALANCE CONTROL..........................................................................................................................................8
2.9 MASTER AND SUB SWITCHES...........................................................................................................................8
2.10 PFL BUTTON........................................................................................................................................................8
2.11 START BUTTON..................................................................................................................................................9
2.12 FADER ...............................................................................................................................................................9
2.13 MODULE CONFIGURATION...................................................................................................................................9
3MONO MODULE...................................................................................................................................................11
3.1 INTRODUCTION ............................................................................................................................................12
3.2 A INPUT.............................................................................................................................................................12
3.3 PHANTOM POWERING.........................................................................................................................................12
3.4 B INPUT.............................................................................................................................................................12
3.5 INSERT INPUT A............................................................................................................................................12
3.6 GAIN INPUT A TRIMMER................................................................................................................................13
3.7 A-B INPUT SELECTOR........................................................................................................................................13
3.8 GAIN CONTROL ................................................................................................................................................13
3.9 EQUALIZATION SECTION....................................................................................................................................13
3.10 PANPOT CONTROL...........................................................................................................................................13
3.11 MASTER AND SUB SWITCHES.........................................................................................................................14
3.12 PFL BUTTON......................................................................................................................................................14
3.13 ON/OFF FUNCTION ...........................................................................................................................................14
3.14 SUMMARY OF THE SERVICES/FUNCTIONS FEATURED BY THE MODULE...............................................................15
3.15 FADER .............................................................................................................................................................15
3.16 MODULE CONFIGURATION .................................................................................................................................16
4TELCO MODULE..................................................................................................................................................18
4.1 SEND OUTPUT..................................................................................................................................................19
4.2 RECEIVE INPUT...............................................................................................................................................19
4.3 REMOTE INTERFACE .......................................................................................................................................19
4.4 REC OUT OUTPUT ...........................................................................................................................................20
4.5 SEND GAIN CONTROL .....................................................................................................................................20
4.6 RECEIVE GAIN CONTROL...............................................................................................................................20
4.7 EQUALIZATION SECTION....................................................................................................................................20
4.8 PANORAMIC CONTROL...................................................................................................................................21
4.9 MASTER AND SUB SWITCHES.........................................................................................................................21
4.10 PRIVATE BUTTON............................................................................................................................................21
4.11 HOOK BUTTON.................................................................................................................................................22
4.12 FADER .............................................................................................................................................................22
4.13 MODULE CONFIGURATION.................................................................................................................................22
5SUB MODULE........................................................................................................................................................24
5.1 SUB OUTPUT.....................................................................................................................................................25
5.2 INSERT ............................................................................................................................................................25
5.3 REMOTE INTERFACE .......................................................................................................................................25
5.4 EXTERNAL IN INPUT......................................................................................................................................26
5.5 REC OUT OUTPUT............................................................................................................................................26
5.6 EXTERNAL FADER SWITCH..........................................................................................................................26
5.7 EXT GAIN CONTROL .......................................................................................................................................27

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5.8 COMPRESSOR SECTION .................................................................................................................................27
5.9 SUB TO COMP SWITCH ....................................................................................................................................27
5.10 AUTO FADER SWITCH ....................................................................................................................................28
5.11 BAL CONTROL ..................................................................................................................................................28
5.12 EXT TO MASTER SWITCH ...............................................................................................................................28
5.13 SUB TO MASTER SWITCH ...............................................................................................................................28
5.14 PFL BUTTON......................................................................................................................................................28
5.15 SLATE BUTTON ................................................................................................................................................29
5.16 FADER .............................................................................................................................................................29
5.17 MODULE CONFIGURATION.................................................................................................................................29
5.18 MODULE CONFIGURATION........................................................................................................................30
6MASTER MODULE ..............................................................................................................................................31
6.1 MASTER OUTPUT.............................................................................................................................................32
6.2 TUNER IN........................................................................................................................................................32
6.3 STUDIO SECTION .............................................................................................................................................32
6.4 CONTROL ROOM SECTION ............................................................................................................................33
6.5 PFL RST BUTTON .............................................................................................................................................33
6.6 TALK BACK FUNCTION...................................................................................................................................33
6.7 METER CONNECTOR ........................................................................................................................................34
6.8 POWER SUPPLY CONNECTOR..............................................................................................................................34
6.9 MODULE CONFIGURATION.................................................................................................................................34
6.10 MODULE CONFIGURATION.................................................................................................................................34
7POWER SUPPLY...................................................................................................................................................36
7.1 AC VOLTAGE (110-220 VAC) ..........................................................................................................................36
7.2 CONNECTION BETWEEN CONSOLE AND POWER SUPPLY......................................................................................37
7.3 SUPPLY VOLTAGES AND TROUBLESHOOTING .....................................................................................................37
7.4 RELAIS...............................................................................................................................................................37
8VU METER.............................................................................................................................................................38
8.1 MIXER CONNECTION .........................................................................................................................................38
8.2 VU-METER OPERATION......................................................................................................................................38
9TIMER (OPTIONAL) .............................................................................................................................................39
10 TECHNICAL SPECIFICATIONS........................................................................................................................39
11 FACTORY PRESET MODULE CONFIGURATIONS......................................................................................40
11.1 STEREO MODULE – FACTORY PRESET JUMPER CONFIGURATION..................................................40
11.2 MONO MODULE – FACTORY PRESET JUMPER CONFIGURATION.....................................................41
11.3 TELCO MODULE – FACTORY PRESET JUMPER CONFIGURATION....................................................42
11.4 MASTER MODULE – FACTORY PRESET JUMPER CONFIGURATION.................................................43
11.5 SUB MODULE – FACTORY PRESET JUMPER CONFIGURATION.........................................................44
12 WARRANTY ..........................................................................................................................................................45
13 APPENDIX A – CONNECTION SCHEMES......................................................................................................45

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1INSTALLATION – MIXING CONSOLE OVERVIEW
•Read carefully the present manual and conserve it
•Oxygenis conceived and builtin conformity with the security laws in force.
•Please use high quality wires with good electric shield and balanced links wherever possible.
•The installation has to be carried on by skilled technicians.
•The images and the graphic layout showed on this manual could be slightly different from the ones
printed on the modules.
•Axel Technology is at Yr. complete disposal for every requirements and troubleshooting. Please read
carefully the manual and the electric layout before contacting our technical office.
•Please verify that the (protective) earth connection is available. Inside Oxygen console audio ground and
the protective earth are linked together.
•ATTENTION: if not otherwise specified, Oxygen is set at 220/230VAC. If different different voltage is
available (ex. 110/115 VAC) you need to open the power supply box and set the voltage switch on the
main supply circuit, located behind the VDE plug.
1.1 INPUT AND OUTPUT MODULES
Oxygen features four different input modules (STEREO, MONO, MULTI INPUT and TELCO module) and two
different output modules to satisfy every requirements (SUB and MASTER module).
STEREO features two stereo inputs (Input A and Input B).
Input A is a line stereo input, while Input B (stereo) may be set through internal jumpers as
line stereo or phono stereo (with built-in R.I.A.A. preamplifier).
The module provides also a REMOTE interface for external equipment Start/Stop facilities.
Optoisolated connection pins assure the electrical immunity from external noise.
MONO features two input sockets. The first one is factory pre-set for microphones (but it’s
switchable to Line) and the other is fixed for Line sources (MONO). The Micro input
sensitivity can be adjusted by turning a trimmer. 48 Volts are provided for phantom
powering of condenser microphones. A comprehensive filter section provides a set of
frequency responses for every requirement. The Microphone can be used also for the ‘Talk
Back to Studio/Ctrl Room’, for phone answering and for ‘Slate’ announcements.
TELCO features a mono-line RECEIVE input and a mono-line SEND output as it is designed to
interface an external telephone hybrid (controlled by the REMOTE interface).
Optoisolated connection pins assure the electrical immunity from external noises.
MULTI INPUT features 6 stereo input channels (Input A….F, Line level) together with an overall volume
control. A REMOTE interface with optoisolated pins provides external equipment Start/Stop
facilities.
SUB features 1 SUB output, 2 Rec output (assignable to the Master or Sub bus), a compressor
section with Auto Fader and Limiter functions, the connections to the DJ Console by AXEL
TECHNOLOGY and the connection to an auxiliary signal
MASTER features the two main outputs (master signal), outputs and controls of the STUDIO and the
CONTROL ROOM sections, the power supply and VU-METER connections, the Talk Back
function and the link to an external Tuner

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2STEREO MODULE
Input A
Input B
A-B Input Selector
BALANCE Control
START/STOP Button
REMOTE Interface
GAIN Control
Equalization Section
MASTER and SUB switches
PFL function
FADER

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2.1 INTRODUCTION
Stereo module is easily and readily configurable as line/line or line/phono depending on the user
requirement. Input A is a line stereo input, while Input B (stereo) may be set through internal jumpers as line
stereo or phono stereo (with built-in R.I.A.A. preamplifier). The module provides also a REMOTE interface to
connect or control external equipment. Optoisolated connection pins assure the electrical immunity from
external noises.
2.2 INPUT A
Input A (Line level) is electronically balanced on a female Jack (L and R) with 0 dB gain.
The plug pin-out presents standard configuration:
•Sleeve Ground
•Tip  Signal
•Ring  Return
We suggest to use everywhere balanced links. See Appendix A for wire connection
schemes.
2.3 INPUT B
Input B can be set through internal jumpers as LINE input (electronically balanced on L
and R Jack with 0 dB gain) or PHONO unbalanced input (performed by an internal
R.I.A.A. preamplifier- see the last paragraph on this chapter for jumper setting).
The plug pin-out presents standard configuration:
•Sleeve  Ground
•Tip  Signal
•Ring  Return
We suggest to use everywhere balanced links. See Appendix A for wire connection
schemes.
In case of turntable, please connect the ‘ground’ turntable wire to the mixing console
frame by means of a screwed link.
2.4 REMOTE INTERFACE
Remote interface is based on a DB 9p female connector and features:
START/STOP COMMANDS
Through the interface you can provide one Start/Stop command regardless of the position
of Input A/B selector.
The Start/Stop function is only enabled by the related button placed on the module and it
doesn’t depend on the slider position.
Two different modes of Start/Stop commands are available depending on the internal
jumper settings.
1) INDIRECT mode (referred to the ‘Start/Stop’ jumper configuration in the scheme
showed at the end of this chapter)
The Start signal is available on the 6-7 pins (optoisolated contact) and the Stop signal is
available on the 1-2 pins (optoisolated contact).
You can choose, through a jumper (J16), between impulsive and permanent mode. In the
first case, at every transition from the Stop to the Start state the contact remains closed for
300 msec, generating a square pulse (6 V amplitude / 300msec length).
In the second case (permanent contact), the Start contact will remain closed till the
Start/Stop button is pressed again.

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Please note that:
§the max current value provided by the Start/Stop photo transistors is 20 mA.
§Interface phototransistors are not able to directly drive any external relais. Please use
them to drive an external power transistor .
§Internal phototransistor impedance is about 150 Ω.
§To group Start/Stop commands, please join pins 7 and 2 + 6 and 1
Pin-out SUB D 9P female in INDIRECT mode:
Pin 1
Emitter of the photocoupled transistor
for START function
Pin 2
Collector of the photocoupled
transistor for START function
Pin 3
enables the PFL function if you supply
+ 6 V and disables it if you supply – 6V
Pin 4 Supplies - 6V
Pin 5
Supplies + 6V when B input is selected
Pin 6
Emitter of the photocoupled transistor
for STOP function
Pin 7
Collector of the photocoupled
transistor for STOP function
Pin 8 GND
Pin 9
Supplies + 6V when A input is selected
2) DIRECT Mode (referred to the ‘Switch/Led’ jumper configuration in the scheme showed
at the end of this chapter)
Through jumper setting you can directly link the electrical connections of the Start/Stop
button to the Remote interface (pins 1-2).
The pins 6-7 are directly linked to the red led next to the Start/Stop button (led current is
about 5 mA). This mode can be used to visualise on the module the READY state of an
external equipment and is frequently when turntable are driven.
Pin-out SUB D 9P female in DIRECT mode:
Pin 1 1° contact of the Start/Stop button
Pin 2 2° contact of the Start/Stop button
Pin 3
enables the PFL function if you supply
+ 6 V and disables it if you supply – 6V
Pin 4 Supplies - 6V
Pin 5
Supplies + 6V when B input is selected
Pin 6 Anode of Start/Stop led
Pin 7 Cathode of Start/Stop led
Pin 8 GND
Pin 9
Supplies + 6V when A input is selected
PFL ACCESS MODE (pin 3)
The PFL ACCESS mode allows the remote enabling of the pre-listening function. You just
need to supply + 6V to enable the function and – 6V to disable it.
A/B INPUT SELECTION SIGNALLING
The signalling of the selected input is available on the interface (pins 5 and 9). if the pin 9
is on +6V state, the A input is selected; if the pin 5 is on +6V state, the B input is selected.
REMOTE CONNECTOR SUPPLIES THE FOLLOWING VOLTAGES:
•-6 VDC (pin 4)
•GND (pin 8)
These voltages can be used to polarize the optoisolator devices. We suggest to use a
100Ω(or more) resistor in series connection with the phototransistor emitter to prevent the
risk of damages to the photocoupler, due to extra-high current.

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2.5 A-B INPUT SELECTOR
It selects the input A (led switched off) without the pressed button; the input B (led
switched on) with the pressed button.
2.6 GAIN CONTROL
It sets the gain from -15dB to +15dB on the selected input (A or B).
We suggest to set the gain so that the output audio signal is not distorted when the slider
is on its upper point and so that the PFL level is 0 dB.
2.7 EQUALIZATION SECTION
The equalisation section is based on three controls: LOW, MID ,HIGH operating from
±15dB.
You can get a flat frequency response when the potentiometers are in their central
position (underlined by a ‘click’).
2.8 BALANCE CONTROL
The
BALANCE
control allows sound balancing between Left and Right output channels.
In the central position the gain is 0 dB for both channels.
2.9 MASTER AND SUB SWITCHES
MASTER and SUB switches connect the module to the Master and/or Sub outputs.
The led inside the switches turn on according to the pressed buttons
By using the Master/Sub assignment, you could, f.i., record an interview to Yr guest in
studio while another musical program is on air. To get this, please assign only to the Sub
output the Mono channels involved in the recording session and to Master output the ones
providing the on air program. See chapter ‘SUB module’ for Sub connections.
2.10 PFL BUTTON
The pre-fader listening serves for input identification when the fader is still shut.
PFL button enables the pre-fader listening of the channel. The led shows that the function
is on.
Please note that every time a new selection is called (or when the button PFL RESET on

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the Master module is pressed) the previous PFL is reset (i.e. it is not possible to listen to
the sum of different PFLs).
Press the PFL RESET key on the Master module to disable any PFL.
PFL signal is available on the Master module, in the Control Room and Studio sections,
where the PFL signal has priority on the other selections. For instance, if both PFL and
Master are selected in the CTRL Room listening section, headphones and loudspeakers
reproduce Master signal till a PFL will be called by one or more input modules. Once the
PFL terminates, the sound reproduction will switch automatically on the previous source
(Master).
The PFL Right and Left channels are showed on the VU meters whenever a PFL is active.
2.11 START BUTTON
The button starts or stops external equipment (such as CD, Minidisk, turntables, etc.)
connected to the module REMOTE interface (see).
The Start/Stop function doesn’t depend on the slider position.
Please refer to ’Remote interface’ paragraph for Start/Stop modes and interface
connections.
2.12 FADER
The slider is one of the most important device in the mixer. For that reason, Axel
Technology uses only slider by ALPS, one of the best manufactures in the field.
The Ntype is provided on series. On demand, we can provide the Kseries and the K/VCA
series too. We highly recommend these as the slider does not act directly on the audio
signal but controls an high quality amplifier. That allows perfect volume control without any
noise and ‘skretch’ even after years of usage.
2.13 MODULE CONFIGURATION
STEREO module features 16 Jumpers enabling different operation modes.
To change a jumper setting, please:
•switch off the console (every intervention on the modules always requires the console switching
off !)
•remove the module
•disconnect the flat cable (pay attention to the two little hooks placed at the connector edges)
•alter the setting position as showed by the following table
•connect again the flat cable and lock the hooks
•insert the module into the console mainframe
•turn on the console
Please refer to the following figure and to the ‘Factory preset jumper configuration’ chapter at the
end of this manual before altering jumper configurations.

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•Phono/line input B setting: see J1, J2, J3, J4, J5, J6 on figure
•If J12, J13, J14 and J15 (placed at the bottom of the board) are
in the Start/Stop configuration (INDIRECT mode), you can get the
following functions:
if J7 is present, the Start/Stop key starts up also the Timer 2
if J8 is present, the Start/Stop key starts up also the Relais 2
if J9 is present, the Start/Stop key starts up also the Relais 1
if J16 (Latch) is present, the interface features a permanent,
optoisolated Start/Stop command
if J16 (Latch) is not present, the interface features an impulsive,
optoisolated Start/Stop command
•If J12, J13, J14 and J15 (placed at the bottom of the board) are
in the SWITCH LED configuration (DIRECT mode), you can drive
the led by an external tension (pin 5 – 6 of interface) and the
Start/Stop button is linked to the 1 – 2 pins. In this case, the functions
related to J7, J8, J9 are disabled.

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3MONO MODULE
Input A
Input B
GAIN Input A Trimmer
A-B Input Selector
PANORAMIC Control
ON/OFF button
Input A INSERT
GAIN Control
Equalisation Section
MASTER and SUB switches
PFL button
FADER

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3.1 INTRODUCTION
The Mono module features two mono inputs (Input A and Input B). Input A is factory pre-set on microphone
level but it can be also easily set on line level. Input B is set only on line level.
3.2 A INPUT
Input A is electronically balanced on female XLR.
Through jumper setting you can change the input A gain to fit the Micro level or the Line
level; a fine gain adjustment only of the Micro level can be achieved through the trimmer
‘Gain input A’ (see GAIN INPUT A Trimmer). Operate on it if the Gain control doesn’t
amplify or attenuate enough the source signal.
Input A is set ex-work on -54dB level (average level of Micro signal).
The plug pin-out presents standard configuration:
•Sleeve  Ground
•Tip  Signal
•Ring  Return
We suggest to use Input A for Micro signals and B for Line signals and to use everywhere
balanced links. See Appendix A for wire connection schemes
3.3 PHANTOM POWERING
48 Volts are provided for phantom powering of condenser microphones. A module internal
jumper (see module internal layout at the end of the chapter) allows to disconnect the 48
volts whenever microphones don’t require external powering.
Attention: always disconnect phantom powering if not necessary and do not use
asymmetrical sources on the microphones input with the phantom power ON.
3.4 B INPUT
Input B (fixed Line level) is electronically balanced on female Jack with 0 dB gain.
The plug pin-out presents standard configuration:
•Sleeve  Ground
•Tip  Signal
•Ring  Return
We suggest to use everywhere balanced links. See Appendix A for wire connection
schemes
3.5 INSERT INPUT A
The INSERT connector allows to insert external equipment (like sound / effect processors,
compressors, filters, etc) between the input A buffer and the remaining stages of module
audio chain.
INSERT point carries an output level of 0 dB (on 100Ωimpedance) and an input level of 0
dB (on 10KΩimpedance).
The plug pin-out presents the following configuration:
•Sleeve  Ground (audio common)
•Tip  Signal Output
•Ring  Signal Input (audio return)

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3.6 GAIN INPUT A TRIMMER
You can use the multi-turns trimmer to fit the Micro level to the input level of the pre-
amplification circuit. It’s highly recommended if the Gain potentiometer doesn’t amplify or
attenuate enough the Micro signal. Adjust the trimmer to reach the 0 dB PFL output level
corresponding to the Gain control central position (read the level on the VU-Meter).
Remember that through jumper setting you can change the input A gain to fit the Micro
level or the Line level (see § 0).
We suggest to use the Input A for Micro signals and the B for the Line signals.
3.7 A-B INPUT SELECTOR
It selects the input A (led switched off) without the pressed button; the input B (led
switched on) with the pressed button.
3.8 GAIN CONTROL
It sets the gain from –15dB to + 15dB on the selected input (A or B).
Set the gain so that:
•the output audio signal is not distorted when the slider is on its upper point
•the PFL level is 0 dB
3.9 EQUALIZATION SECTION
The equalisation section is based on three controls: LOW, MID, HIGH (ranging from
±15dB).
In particular, you can modify the Middle frequencies between 0.3 and 4.8 KHz (central
position: 1 KHz).
You can get a flat frequency response when the potentiometers are in their central
position (underlined by a ‘click’).
3.10 PANPOT CONTROL
The PAN control allows sound balancing between Left and Right output channels. In the
central position the gain is 0 dB for both channels.

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3.11 MASTER AND SUB SWITCHES
MASTER and SUB switches connect the module to the Master and/or Sub outputs.
The leds inside the switches turn on according to the pressed buttons.
By using the Master/Sub assignment, you could, f.i., record an interview to Yr guest in
studio while another musical program is on air. To get this, please assign only to the Sub
output the Mono channels involved in the recording session and to Master output the ones
providing the on air program. See chapter ‘SUB module’ for Sub connections.
NOTE: Master/Sub output are fed only if the module is in the ON state
3.12 PFL BUTTON
It enables the pre-fader listening of the channel. The led light shows that the function is on.
Please note that every time a new selection is called (or when the button PFL RESET on
the Master module is pressed) the previous PFL is reset (i.e. it is not possible to listen to
the sum of different PFL).
PFL function is independent from the On/Off module state.
Press the PFL RESET key on the Master module to disable any PFL.
PFL signal is available on the Master module, in the Control Room and Studio sections,
where the PFL signal has priority on the other selections. For instance, if both PFL and
Master are selected in the CTRL Room listening section, headphones and loudspeakers
reproduce Master signal till a PFL will be called by one or more input modules. Once the
PFL terminates, the sound reproduction will switch automatically on the previous source
(Master).
The PFL Right and Left channels are showed on the VU meters whenever a PFL is active.
3.13 ON/OFF FUNCTION
The On/Off button enables/disables the main module output toward Master and/or Sub
outputs (depending on the selected Master/Sub switches).
If the module is on the ‘Off’ state no signal is broadcast even if the slider is open.
Please note that the On/Off state doesn’t involve the Talk Back communications and the
phone call answering performed by the same microphones connected to the mono
modules.
Through internal jumpers setting (see ‘module configuration’ paragraph at the end of this
chapter), you can choose one of the following On/Off operation modes:
•Independent mode: On/Off button only enables/disables the module.
•Transfer mode: the opening of the slider brings the module into the ON state (the led
near the key turns on) and vice versa. You can also continue to use the ON/OFF
button, that will modify the module operation state (On/Off) according to the state
reached by the slider. E.g. if the slider opening has brought the module into the ON
state, through the key you can get back the OFF state even if the slider is still opened.
•Remote mode: The On/Off state is regardless of the slider position. You can control
the On/Off function either in local mode (through related button) or in remote mode,
through an external device (‘DJ Console’ by Axel Technology) linked to the SUB
module. Thanks to it, the speaker (normally located in studio) is able to remotely
switch the mixer module related to his microphone. Moreover, through a mixer-like
slider he can fade the level of the on-air musical program (for speech interventions
mixed to the songs). A Talk Back function is also provided for communications from
Studio to Control Room.

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3.14 SUMMARY OF THE SERVICES/FUNCTIONS FEATURED BY THE MODULE
You can use the same microphones connected to the Mono modules (no matter of the
On/Off state and of slider position) also for phone answering (through the Telco modules),
CTRL Room to Studio / Studio to CTRL Room talk back communications (through the
Master module) and for the Slate function on the Sub module:
§If the jumper J10 is present, phone answering through the microphone is enabled by
pressing the ‘Private’ button on the Telco module (see chapter 4).
§If the jumper J10 is present, Talk Back communications from Ctrl Room to Studio are
achieved through the Ctrl Room microphones by pressing the ‘Talk back’ button on
the Master module (see chapter 7)
§If the jumper J10 is present, speech announcements on the Sub outputs are achieved
by pressing the ‘Slate’ button on the Sub module (see Sub chapter)
§If the jumper J9 is present, Talk Back communications from Studio to Ctrl Room are
achieved through the Studio microphones by pressing the ‘Talk back’ button on the
Master module (see chapter 7)
By default (factory preset), every mono module (excluding the last one on the right) is set
for the Studio microphones (“Talk Back to Control Room” configuration) and the the last
one on the right
is set for the
Control Room
microphones (“Talk Back to Studio”
configuration plus the other facilities here described)
Through internal jumpers setting you can also associate the On/Off state or the fader
opening (depending on the On/Off mode) to the following actions (see the last paragraph
on this chapter)
•Start/stop of the (optional) Timer 1 (see jumper J5)
•Cut off (‘Mute’) of the Control Room and/or Studio monitor loudspeakers (to avoid
‘Larsen’ effects- see jumper J3 and J4)
•Switching of two relays built-in in the power supply (relay 1 and 2- see jumper J6 and
J7). You could use this function to light an ‘On Air’ lamp (as Mr. Light by AXEL
TECHNOLOGY)
3.15 FADER
The slider is one of the most important device in the mixer. For that reason, Axel
Technology uses only slider by ALPS, one of the best manufactures in the field.
The Ntype is provided on series. On demand, we can provide the Kseries and the K/VCA
series too. We highly recommend these as the slider does not act directly on the audio
signal but controls an high quality amplifier. That allows perfect volume control without any
noise and ‘skretch’ even after years of usage.

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Pag. 16
3.16 MODULE CONFIGURATION
On the MONO module board you find 10 Jumpers allowing different operation modes and functions.
To change a jumper setting, please:
•switch off the console (every intervention on the modules always requires the mixer switching off !)
•remove the module
•disconnect the flat cable (pay attention to the two little hooks placed at the connector edges)
•alter the setting position as showed by the following table
•connect again the flat cable and lock the hooks
•insert the module into the console mainframe
•turn on the console
Please refer to the following figure and to the ‘Factory preset jumper configuration’ chapter at the
end of this manual before altering jumper configurations.

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Pag. 17
If J1 is present, Phantom voltage is enabled on input A
•If J2 is present, input Ais set for MICRO level (otherwise is set
on Line level)
•If J3 is on ‘Fader Enable’ position, every time you open the
slider (no matter of the On/Off key) the Studio monitor loudspeakers
are cut off.
•If J3 is on ‘On Enable’ position, when the module is in the ON
state the Studio monitor loudspeakers are cut off.
The On/Off switching mode is determined by the J8 position.
If J3 is not present, no function is featured
•If J4 is on ‘Fader Enable’ position, every time you open the
slider (no matter of the On/Off key) the Ctrl Room monitor
loudspeakers are cut off.
If J4 is on ‘On Enable’ position, when the module is in the ON state
the Studio monitor loudspeakers are cut off. The On/Off switching
mode is determined by the J8 position.
If J4 is not present, no function is featured
•If J5 is on ‘Fader Enable’ position, every time you open the
slider (no matter of the On/Off key) the TIMER 1 starts.
•If J5 is on ‘On Enable’ position, every transition from the Off to
the On state starts the TIMER 1
The On/Off switching mode is determined by the J8 position.
If J5 is not present, no function is featured
•If J6 is on ‘Fader Enable’ position, every time you open the
slider (no matter of the On/Off key) the RELAIS 2 switches.
•If J6 is on ‘On Enable’ position, every transition from the Off to
the On state switches the RELAIS 2
The On/Off switching mode is determined by the J8 position.
If J6 is not present, no function is featured
•If J7 is on ‘Fader Enable’ position, every time you open the
slider (no matter of the On/Off key) the RELAIS 1 switches.
•If J7 is on ‘On Enable’ position, every transition from the Off to
the On state switches the RELAIS 1
The On/Off switching mode is determined by the J8 position.
If J7 is not present, no function is featured
•If J8 is not present: the On/Off button only enables / disables
the module (Independent mode)
If J8 is on ‘Fader enable’ position: the opening of the slider brings
the module into the ON state and vice versa. You can also continue
to use the ON/OFF button, that will modify the module operation
state (On/Off) according to the state reached by the slider (Transfer
mode)
If J8 is on ‘Ext On’ position: the On/Off state is regardless of the
slider position. You can control the On/Off function either in local
mode (through related button) or in remote mode, through an
external device connected to the SUB module (Remote mode)
•If J9 is present the pre-fader signal is used for ‘Talk Back to
CTRL ROOM’ function
•If J10 is present, the pre-fader signal is used for ‘Talk Back to
STUDIO’ communication, for phone answering and for the Sub Slate
function

Oxygen 5
Pag. 18
4TELCO MODULE
SEND Output
RECEIVE Input
PAN Control
HOOK Button
REMOTE interface
REC OUT Output
SEND GAIN Control
RECEIVE GAIN Control
Equalisation Section
MASTER and SUB switches
PRIVATE Button
FADER

Oxygen 5
Pag. 19
4.1 SEND OUTPUT
The Send output allows to send to the telephone line - through an external phone hybrid
(e.g. MACROTEL7 by AXEL Technology) - the signal composed by the sum of the output
signals from every module except the Telco one.
Send output (mono) is electronically balanced on female a Jack with 0 dB gain.
The pin-out presents standard configuration:
•Sleeve  Ground
•Tip  Signal
•Ring  Return
We suggest to use balanced links. See Appendix A for wire connection schemes.
4.2 RECEIVE INPUT
The input RECEIVE allows to receive, through an external phone hybrid (e.g.
MACROTEL7 by AXEL Technology) a phone signal incoming from the telephone line.
Receive input (mono) is electronically balanced on female a Jack with 0 dB gain.
The pin-out presents standard configuration:
•Sleeve  Ground
•Tip  Signal
•Ring  Return
We suggest to use balanced links. See Appendix A for wire connection schemes.
4.3 REMOTE INTERFACE
Remote interface is based on DB 9p female connector.
Module facilities and functions settings are:
REMOTE MUTING
The Mute remote mode allows the remote Muting of the module (outputs toward Master
bus). You just need to feed the pin 7 of the interface with +6V voltage.
HOOK – RING FACILITIES
Hook button contact is available on pins 4-5 (optoisolated contact). The signalling of
incoming call can be brought to the ‘Ring’ led near the Hook button through the 8-9 pins.
On request, Axel Technology supplies a special cable to remote Macrotel telephone hybrid
from the console.
Pin-out SUB D 9P female:
Pin 1 GND
Pin 2 N.C.
Pin 3 N.C.
Pin 4
Emitter of the photocoupled transistor for
HOOK function
Pin 5 Collector of the photocoupled transistor for
HOOK function
Pin 6 supplies + 6V
Pin 7
enables the MUTE function if you supply
+ 6 V
Pin 8 Ring Led cathode
Pin 9 Ring Led anode

Oxygen 5
Pag. 20
THE CONNECTOR SUPPLIES THE FOLLOWING VOLTAGES:
•+ 6 VDC (pin 6)
•GND (pin 1)
These voltages can be used to polarize external optoisolator devices. We suggest to use a
100Ω(or more) resistor in series connection with the phototransistor emitter to prevent the
risk of damages to the photocoupler, due to extra-high current.
4.4 REC OUT OUTPUT
Depending on the internal jumper setting, REC OUT connector (mono-balanced) provides:
§the only signal incoming from the telephone line (Receive signal)
•the only signal outgoing to the telephone line (Send signal)
•the sum of two signals.
The REC OUT signal (mono) is electronically balanced on female Jack with 0 dB gain.
The pin-out presents standard configuration:
•Sleeve  Ground
•Tip  Signal
•Ring  Return
We suggest to use balanced links. See Appendix A for wire connection schemes
4.5 SEND GAIN CONTROL
It sets the gain from -15dB to + 15dB of the signal send to the telephone line.
4.6 RECEIVE GAIN CONTROL
It sets the gain from -15dB to + 15dB of the signal received from the telephone line.
4.7 EQUALIZATION SECTION
The equalisation section is based on the MID control operating from ±15dB.
In particular, you can vary the operation frequencies of Mid control between 0.3 and 4.8
KHz (central position: 1 KHz).
You can get a flat frequency response when the potentiometers are in their central
position (underlined by a ‘click’).