ALICE AIR 2000 User manual

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AIR 2000 Broadcast Console
User Manual
THE CONCEPT
The ALICE AIR 2000 Broadcast console is designed specifically for rigorous use by professional broadcasters. Over
three years of research and development, together with extensive consultation with engineers and presenters at
many radio stations world-wide, have resulted in numerous features not normally available without expensive
customisation, or external ‘black boxes’.
The AIR 2000 has been designed to require minimum maintenance and to provide excellent reliability for many years
of hard service. All component parts have been carefully selected to ensure that their life expectancy is no less than
that appropriate for the job. Only high-quality conductive plastic faders are used. High quality VCA's remove audio
signals from channel faders maximising their life, eliminating 'scratching' and ensuring tight stereo tracking.
Headphone and speaker controls, normally notorious for early failure, employ the same VCA technology, together
with DC control derived from paralleled potentiometers for maximum reliability.
All ICs are fitted in gold plated, turned pin holders for ease of servicing and reliable contact. Two-part, gold plated
locking, module connectors eliminate unreliable edge connectors. All illumination is achieved by high brightness LED
clusters, eliminating bulb failures. Large heavy duty, high quality switches are provided for main functions.
A blank sheet approach to circuit design has resulted in many innovative circuitry developments, which extensively
overcome previous shortcomings in commonly used circuit configurations.
A totally new electronic floating balanced output stage gives a ‘ruler flat’ frequency response and a full 28dB wide
band headroom performance unbeaten by even the best transformer-based outputs. This proprietary design
achieves an output impedance of less than 1 ohm, uniquely guaranteeing constant output level into balanced or
unbalanced loads, irrespective of their impedance. In comparison, a typical 75-ohm output would suffer a gain error
of over 1 dB and commonly also results in changes to the frequency response when the load is changed from high
impedance bridging to 600 ohms.
Many active balanced outputs do not allow unbalanced connection without causing considerable gain error and/or
gross distortion and in some cases may even damage the shorted output driver. Others which attempt to overcome
these problems are prone to instability when driving long lines, still give unbalanced gain errors of around 0.2dB and
rely on sensitive adjustment pots to achieve acceptable output balance. Naturally, these tend to drift with time and
result in additional maintenance work for the already overstretched engineer. With no fewer than 8 balanced output
stages on the main output module and others on insert points and telephone sends, the total elimination of output
balance adjustment pots is a major advantage. A unique pan pot design ensures perfect centre balance and provides
25-3OdB better final attenuation than conventional designs.
New level control and EQ circuitry utilising centre-tapped pots and zero impedance buffers forces predictable
performance, irrespective of pot tolerances, ensuring outstanding stereo tracking.
Mix busses are differentially balanced for improved crosstalk performance, rejection of unwanted interference and
ground loops. Totally silent solid-state audio switching completely removes inactive input channels from the mix-
busses, preventing unnecessary build-up of mix noise and providing virtually unmeasurable inter-channel crosstalk.

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DUAL MICROPHONE INPUT - Two separate, state of the art mic pre-amps gives individual gain pre-set and phantom
power for different microphone configurations. Remote control of channel ON, OFF, COUGH, & REVERSE TALKBACK
is steered through the A/B switch to allow connection of illuminated remote buttons at the selected microphone
position. Loudspeaker muting and on- air lights are separately programmable between control room and studio.
DUAL STEREO LINE INPUT - Two electronically floating balanced stereo inputs, with individual gain pre-set accept
signals from varying sources, including domestic equipment, without additional level matching interfaces. Remote
switching is steered through the A/B input select switch and steady state or pulsed control outputs may be
programmed separately for each input. Left and right buttons allow either the left or right channel to be directed to
the stereo output, (selecting both switches the channel to mono).
MACHINE & MICROPHONE TIMERS - are fitted as standard, and a further optional timer unit can be fitted to all but
the smallest frames for use with the off-air record mix.
METERING - Three PPM meters are fitted as standard (VU meters are available to special order). The metering is
configured so that the stereo meters show PGM output and the mono meter follow the source selected on the
Control Room monitor module and overridden by CUE. Additional meter modules may be fitted to mixer frames
(space permitting) to monitor REC, AUX and MONITOR outputs - these can be ordered with the mixer or easily user-
fitted later.
PFL/CUE - may be jumper selected to automatically cancel when channels are put to air, allowing easy junctions into
network feeds and preventing accidental cueing of open channels.
LOGIC - Opto isolated start/stop outputs allow connection to almost any logic levels, virtually eliminating the need
for engineers' 'black boxes' to interface differing makes of studio equipment. The A and B inputs are separately
programmable with either steady state or pulse signals to allow for dissimilar machine start/stop requirements, even
on the same channel. Provision is made for control of start/stop logic functions by external remote-control buttons.
Microphone channels can also be remote controlled with external remote button provision for ON, OFF, COUGH and
REVERSE TALKBACK to operator. This extensive remote control can allow a newsreader at a remote position to play
in his carts.
FRONT PANEL CONTROLS
DUAL INPUT MICROPHONE MODULE (2001/2101)
GENERAL - The dual input microphone module features two, separate, state of the art, transformer less pre-
amplifiers with a noise figure, at full gain, within 0.5dB of theoretical limits and a common mode rejection typically
better than 2OdB. Individually adjustable internal pre-sets allow for differing microphone types and working
distances at the A and B mic positions. Gain is adjustable in the range of - 4OdB to -7OdB, with a further +/- 10dB
gain available from the front panel trim pot, giving a total range of -3OdB to -8OdB. High level audio switching after
the pre-amps prevents switch clicks.
The comprehensive logic control may be programmed independently for each input. Remote control of ON, OFF,
COUGH and REVERSE TALKBACK commands are available together with LED drivers for remote button illumination.
These are automatically steered to and from the appropriate mic position via the A/B switch.
Controls have been kept simple and uncluttered to allow self-operation by relatively non-technical staff. Large
illuminated push buttons are provided for major functions.
TRIM - Allows +/- 10dB gain adjustment. The pot gives continuous gain adjustment, whilst maintaining maximum
headroom at all gain positions.
INPUT SELECT - Selects between the A or B mic inputs and steers the programmable control
logic to and from the appropriate mic position, Separate high brightness LED’s are situated adjacent to the A/B
switch to give clear indication of which input is selected.
OPTIONAL EQ - Provides 15dB boost or cut at 60Hz (LF) and 12kHz (HF) with a shelving characteristic, and 15dB

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boost or cut tuneable from 700Hz to 1OkHz with a bell characteristic and a "Q' (bandwidth factor) of 1.5. Centre
detents allow for easy location of the flat position. An EQ in/out switch with LED indication is provided.
OUTPUT SELECT - The REC button diverts the main channel output to the off-line record mix. It also routes the
channel's clean feed outputs to the off-line clean feed busses producing an appropriate feed for any telco channels
that are similarly routed to the REC mix rather than the main PGM mix. This therefore allows completely
independent off-line stereo production and recording to take place whilst the mixer is on-air.
AUX - The AUX button selects the channel output to the aux-mix, providing a convenient method of generating an
additional stereo clean feed for effects, studio foldback and reverse cue for remote broadcasts.
PAN - Allows the channel output to be placed at any point within the stereo image. The indented centre position
presents a loss of 3dB giving a substantially constant sound level no matter where the signal is positioned within the
stereo image.
CUE - Cue mode is activated on and off by successive presses of the button. Indication of cue is provided by high
brightness LED illumination of the switch. Various auto-reset functions can be programmed to suit user
requirements. Cue is derived after the pan pot but before the channel's stereo VCA section. This allows the pan pot
to be set up whilst in cue ('stereo in place cueing'). Please refer to logic pre- programming section.
FADER - A high quality conductive plastic 104mm unit is fitted. The fader controls a DC voltage, which in turn
controls the channel VCA’s and provides bottom of track switching functions for logic control and final audio muting.
ON / OFF - Please refer to logic pre-programming section.
DUAL INPUT STEREO LINE MODULE (2002/2102)
GENERAL - The dual input stereo line module is designed to accept stereo or mono line level inputs. Non-standard
levels are allowed for by means of internal pre-sets, with a gain range of -10dB to +20dB, with reference to the
normal unity gain setting. The A & B inputs may be lined up separately allowing normal professional line levels on
one input, whilst low level domestic equipment may be used on the other input. Logic control is extremely flexible
and may be programmed independently for each input. Start and stop commands are fully opto-isolated, allowing
almost any external
machine logic to be interfaced without the need for custom black boxes. Controls have been kept simple and
uncluttered to allow self-operation by relatively non-technical staff. Large illuminated push buttons are provided for
major functions.
TRIM - Allows +/- 10dB gain adjustment. The pot has a centre indent to allow easy location of 'unity gain' position.
INPUT SELECT - Selects between the “A” and “B” stereo line inputs and steers the programmable control logic to the
appropriate machine. Separate high brightness LED’s are situated adjacent to the A/B switch to give clear indication
of which input is selected.
LEFT/RIGHT/MONO - The LEFT button routes the left leg of the input signal to both sides of the channel output. The
RIGHT button routes the right leg of the input signal to both sides of the channel output. Selecting both LEFT and
RIGHT buttons together will mono the input.
OPTIONAL EQ SECTION - Provides 15dB boost or cut at 60Hz (IF) and 12kHz (HF) with a shelving
characteristic, and 15dB boost or cut at 1 kHz (MF) with a Bell characteristic and a "Q" (bandwidth factor) of 1.5.
Centre detents allow for easy location of the flat position. An EQ in/out switch with LED indication is provided.
OUTPUT SELECT - The REC button diverts the main channel output to the off-line record mix. It also
routes the channel's clean feed outputs to the off-line clean feed busses producing an appropriate feed for any telco
channels that are similarly routed to the REC mix rather than the main PGM mix. This therefore allows completely
independent off-line stereo production and recording to-take place whilst the mixer is on-air.

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AUX - The AUX button selects the channel output to the aux. mix, providing a convenient method of generating an
additional stereo clean feed for effects, studio foldback and reverse cue for remote broadcasts.
BALANCE - ± 3dB of adjustment is provided to allow for stereo imbalance on programme material or for effect. A
centre detent allows easy location of the calibrated position.
CUE - Cue mode is activated on and off by successive presses of the button. Indication of cue is provided by high
brightness LED illumination of the switch. Various auto-reset functions can be programmed to suit user
requirements. Cue is derived after the balance pot, but before the channel's stereo VCA section. This allows the
balance pot to be set up whilst in cue ('stereo in place cueing'). Please refer to logic pre-programming section.
FADER - A high-quality conductive plastic 104mm unit is fitted. The fader controls a DC voltage, which in turn
controls the channel VCA’s and provides bottom of track switching functions for logic control and final audio muting.
FADER START - Enables fader start facility for machine control. Opening the fader then becomes
equivalent to simultaneously pressing the ON button and closing the fader becomes equivalent to simultaneously
pressing the OFF button.
ON / OFF - Please refer to logic pre-programming section.
TELCO INPUT MODULE (2003)
GENERAL - The Telco input module is designed to allow the connection of phone-in lines via an
external telephone hybrid. Many hybrids incorporate a changeover relay between a normal telephone instrument
and the hybrid line connection. This can be remote operated from the channel.
Controls have been kept simple and uncluttered to allow self-operation by relatively non-technical staff. Large
illuminated push buttons are provided for major functions.
TRIM - Allows +/- 10dB gain adjustment. The pot has a centre detent to allow easy location of ‘unity gain’ position.
HOLD - Produces the necessary signal for telephone hybrids that incorporate a changeover function between the
normal telephone handset and the channel input.
OUTPUT SELECT - The REC button diverts the main channel output to the off-line record mix. This therefore, allows
completely independent off-line stereo production and recording to take place whilst the mixer is on-air.
AUX - The AUX button selects the channel output to the aux-mix, providing a convenient method of generating an
additional stereo clean feed for effects, studio foldback and reverse cue for remote broadcasts.
PAN - Allows the channel output to be placed at any point within the stereo image. The indented
centre position presents a loss of 3dB which gives a substantially constant sound level no matter where the signal is
positioned within the stereo image.
CUE - Cue mode is activated on and off by successive presses of the button. Indication of cue is provided by high
brightness LED illumination of the switch. Various auto-reset functions can be programmed to suit user
requirements. Cue is derived after the pan pot but before the channel's stereo VCA section. This allows the pan pot
to be set up whilst in cue ('stereo in place cueing'). Please refer to logic pre- programming section.
FADER - A high quality conductive plastic 104mm unit is fitted. The fader controls a DC voltage, which in turn
controls the channel VCA’s and provides bottom of track switching functions for logic control and final audio muting.
OUTSIDE SOURCE MODULE (2004)
GENERAL - The 2004 Outside Source Channel adds support for remote sources using modern wide-bandwidth links.
One channel can accommodate four such sources and provide each with a stereo, full-bandwidth cue feed. Cue
feeds can be individually assigned to receive programme (desk output) or a cleanfeed (desk output with the outside
source material removed). The internal electronic mix-minus stage offers high rejection across the full audio band.

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Two talkback circuits allow communication with all sources whether selected or not.
An auxiliary stereo input can optionally be mixed into the cue feed.
GAIN TRIM - varies the gain applied to the source signal between 10dB of loss and 10dB of gain. A centre detent
marks 0dB.
CLEANFEED indicator - when lit, indicates that the selected source is receiving a cleanfeed rather than a
straightforward programme feed.
SOURCE SELECT Switches - one source from the four available is selected to provide the input signal for the channel,
and can be fed to the PGM, REC, and AUX busses in the usual way. The selected source receives a cue feed
switchable between programme and cleanfeed (the four sources can have different settings) by internal links or an
external logic signal, while the three unselected sources naturally receive a straight programme feed. The cue feeds
can optionally be forced into mono internally.
L/R/MONO Switches - the same flexible routing found on other Air 2000 channels can accommodate a wide range of
input formats in both stereo and mono.
SPLIT CUE - when stereo cue feeds are in use, the split cue option prevents talkback from completely overriding the
normal cue audio. If selected, talkback appears on the right feed with dimmed mono audio on the left channel for
monitoring.
TALK to STANDBY - a push-to-talk button allowing simple unidirectional communication with the three unselected
sources. The Air 2000’s sensitive internal talkback microphone is used as the source of talkback audio, which is sent
to the sources down their cue feeds (see also Split Cue above).
REC button - use of the REC button assigns the channel to the Air 2000’s off-line record bus. When in this mode, it is
removed from the main mix regardless of the position of the fader, etc. With judicious use of this feature, a
programme can be recorded while a second, separate programme is presented live. When in REC mode, the cue
feeds (whether normal or cleanfeed) will be derived from the record bus rather than the programme bus.
AUX button - the AUX bus is an uncommitted general-purpose stereo bus provided for the convenience of users. A
channel can be fed to the AUX bus regardless of whether it is assigned to the programme or record bus and use of
the AUX bus does not remove the channel from any of the other busses.
TALK pushbutton - a ‘push-to-talk’ button allowing communication with the selected source. Again, the Air 2000
internal talkback microphone is used. By placing the 2004 channel in CUE mode, full bidirectional communication is
possible with the selected source - outgoing talkback travels via the cue feeds, while the selected source can respond
on its normal programme line (see also Split Cue above).
CUE pushbutton - also known as pre-fade or audition, placing the channel in CUE mode allows auditioning of the
selected source material prior to its use on-air.
FADER start - with fader start selected, the channel will automatically be turned on when the fader is raised from its
end-stop and turned off again when the fader returns to the bottom of its travel. 7 © Alice Ltd 2019 v4
ON pushbutton - when the ON button is illuminated, the fader is live and able to feed audio to either the programme
or record bus (whichever is selected).
OFF pushbutton - when the OFF button is lit, the channel is prevented from contributing to the mix, regardless of
fader position. Some operators prefer to leave the fader at the top of its travel and control the channel simply with
the ON and OFF buttons. Others rather use the fader conventionally, either with or without fader start.

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CONTROL ROOM MONITOR MODULE (2007)
GENERAL - The control room is normally defined as the room in which the desk is situated. The module controls
allow the operator to select which source the control room speakers, headphones and metering follow.
SWITCHES 1 to 5 are provided for user definable sources such as other studios, external lines, or tape machine return
feeds.
AIR - allows for the connection of a receiver for off-air monitoring.
PGM - allows for the direct monitoring of the main stereo programme mix.
REC - allows for the direct monitoring of the off-line record mix.
AUX - allows for the direct monitoring of the aux mix. (N.B. The REC selection carries PGM monitoring as its default
setting, therefore, if there are no channels selected to REC its output mimics the PGM bus).
METER SELECT SWITCHES - Allows the operator to select which source the desk's metering follows. Metering can
follow the control monitor selection directly, or can be selected to follow the PGM, REC, or AUX mixes.
GUEST Headphones - Separate level control for guest headphones, which are not interrupted by cue or talkback.
CONTROL (Presenter) Headphones - Separate level control for operator's headphones.
CUE TO SPEAKERS - Allows Cue to be sent to the control room monitor speakers. Without this facility
selected the speakers will continue to follow the control room monitor selection.
STEREO CUE - This control allows full stereo cue to be heard on the operator's headphones (and, if CUE TO SPEAKERS
is engaged, on the control room monitor speakers), whenever an input module is put into cue mode. Without
STEREO CUE selected, split cue is heard, mono cue being fed to the left side and a dimmed, mono programme (as
selected by the source selection switches) to the right.
CONTROL SPEAKERS - VCA controlled level pot for monitor speakers.
DIM - Dims monitor speakers by a fixed 2OdB thus avoiding the need to change the control
room monitor pot from the preferred setting.
MONO - This control switches the monitor speakers and operator's headphones into mono for
phase compatibility checks.
OUTPUT
ON AIR CONTROL MODULE (2006/2007) - Three large non-latching push buttons are fitted at the top of the module
for connection to the ALICE AIRSWITCH studio switching matrix, controlling the switching of up to three studios to air
on an 'offer/accept' basis, and to control the station's profanity delay equipment. The buttons feature high
brightness LED illumination and are marked:
ON AIR
OFFER
DELAY
A further 5 unmarked non-latching switches, also with LED illumination are fitted to allow for user definable status
and transmitter alarms. Momentary switches are fitted to allow for accept or reset functions.
DUMP - instructs delay unit, if fitted, to dump delay and return to real time, thereby removing any unwanted
programme material contained within the delay period. Jumper selects are available on the telco modules to

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automatically reset the channel to OFF when dump button is pressed, ensuring that an offending caller having
already been edited is not left live to air.
DUAL INPUT SELECTOR MODULE (2008) - This module provides dual selection of eight stereo signals into one stereo
output. Typical applications include use as a line pre-selector ahead of input modules, allowing selection of several
remote outside audio sources. Two banks of switches are provided each fed with identical sources. This allows cross
fading between sources when connected to two stereo input modules.
TAPE REMOTE MODULE (2009) –Discontinued - Up to three machines may be remotely operated via this module. All
switches may be illuminated for status indication.
TALKBACK MODULE (2010) - This module allows the AIR 2000 to be linked to an ALICE TLK-10 talkback system,
designed for instant communication between studios, newsrooms and other areas. 10 push to talk buttons allow
selection of individual destinations as well as a 'talk to all' facility. The buttons illuminate to indicate the source of
incoming talkback.
LOGIC PROGRAMMING & AUDIO LEVEL
DUAL INPUT MICROPHONE MODULE (2001/2101)
AUDIO LEVEL PRE-SET CONTROLS
“A” INPUT
RV1 pre-sets the channel input gain.
“B” INPUT
RV2 pre-sets the channel input gain.
The controls above provide a coarse gain pre-set to compensate for differing makes of microphone and user
techniques. The front panel trim provides an additional 10dB of fine control.
LOGIC OPTIONS
Cue Reset - It is possible to pre-programme three alternative methods of resetting from cue to normal monitoring.
LINK 3 controls the options.
1. Link set to “A”: Cue will reset when the channel is ON and the fader then opened. Cue mode can therefore only be
selected if fader is closed, or channel is OFF with the fader open.
2. Link set to “B”: Cue will reset when the channel is either ON or OFF and the fader is then opened. Cue mode can
therefore only be selected with fader closed.
3. Link Removed: Cue mode can be selected or deselected via front panel switch regardless of channel status.
N.B. With either option 1 or 2 the operator is prevented from selecting “cue” if the fader is open thus preventing
accidental cueing of open channels.
LOUDSPEAKER MUTE / RED LIGHT
SW8 Controls the following options:
SW8 (1): When selected to ON, the CONTROL ROOM speaker output will be muted, and the CONTROL ROOM RED
LIGHT output activated when the A input microphone is live.
SW8 (2): When selected to ON, the CONTROL ROOM speaker output will be muted
and the CONTROL ROOM RED LIGHT output activated when the B input microphone is live.
SW8 (3). When selected to ON, the STUDIO speaker output will be muted and the
STUDIO RED LIGHT output activated when the ‘A’ input microphone is live.
SW8 (4). When selected to ON, the STUDIO speaker output will be muted and the
STUDIO RED LIGHT output activated when the ‘B’ input microphone is live.
N.B. - The CONTROL ROOM is defined as the room in which the mixer is installed, and the STUDIO is defined as an
adjacent room.

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PHANTOM POWER –48v
LINK 1 activates the 48V phantom power supply to the A microphone input when set to the B position.
LINK 2 activates the 48V phantom power supply to the B microphone input when set to the B position.
The following additional pre-set controls will be found on the board. They are all factory pre-set controls and should
therefore not be adjusted.
RV11 is the VCA distortion trim for the right channel audio path.
RV12 is the VCA distortion trim for the left channel audio -path.
RV4 fine tunes the VCA gain pre the fader.
DUAL INPUT STEREO LINE MODULE (2002/2102)
AUDIO LEVEL PRE-SET CONTROLS
"A" INPUT
RV1 (marked 'LA’) pre-sets the LEFT channel input gain
RV6 (marked 'RA') pre-sets the RIGHT channel input gain
"B" INPUT
RV2 (marked 'LB') pre-sets the LEFT channel input gain
RV7 (marked 'RB') pre-sets the RIGHT channel input gain
The controls above allow the user to compensate for domestic level equipment being connected directly to the
channel and eliminates the need for interface equipment.
LOGIC OPTIONS
CUE RESET - It is possible to pre-programme three alternative methods of resetting from cue to normal monitoring.
LINK 1 (marked “cue reset”) controls the options.
1. Link set to 'A': Cue will reset when the channel is ON and the fader then opened. Cue mode can therefore only be
selected if fader is closed, or channel is OFF with the fader open.
2. Link set to 'B': Cue will reset when the channel is either ON or OFF and the fader is then opened. Cue mode can
therefore only be selected with fader closed.
3. Link Removed: Cue mode can be selected or deselected via front panel switch regardless of channel status.
N.B. With either option 1 or 2 the operator is prevented from selecting “cue" if the fader is open thus preventing
accidental cueing of open channels.
TIMER - SW11 (marked "TIM A"). INPUT A SELECTED. With this switch in the ON position the machine timer will reset
and automatically begin counting up when the front panel ON switch is pressed with the fader opened; or when the
fader is opened with "fader start” selected. (With this switch in the OFF position the timer will ignore all operations.)
SW11 (marked "TIM B") INPUT B SELECTED. As above for B input.
STOP/START - SW11 (marked “STDY A"). With this switch selected to OFF, a pulse will be sent to the ‘A’ input opto
each time the front panel channel ON button is pressed, regardless of whether the channel fader is open or closed.
(To allow remote starting of machines whilst channel is in cue mode.) With SW11 selected to ON the ‘A’ input opto
will directly mimic the front panel ON button, producing a steady-state signal when the channel is ON. Similarly,
when the FADER START button is selected, either a pulse or steady signal (as selected above) will be sent to the
appropriate machine when the fader is opened.
SW11 (marked “STDY B") works exactly as above for the ‘B’ input.

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LINK 2 (marked “OFF RDY") controls the operation of the OFF button on the front panel. In position ‘A’ the front
panel button will operate and indicate normally allowing the operator to turn the channel OFF. In the B position the
channel OFF function can also be made to work in conjunction with an outside OFF signal source. The OFF switch
used to stop the machine and the OFF lamp can then be used to indicate a machine's readiness to start. (Certain
machines produce a flashing “ready" indication which the OFF button will mimic).
LINK 3 (marked 'OFF RDY') works exactly as above for the ‘B’ input. The following additional pre-set controls will be
found on the board. They are all factory pre-set controls and should therefore not be adjusted.
RV8 (marked “DIST R") is the VCA distortion trim for the right channel audio path.
RV5 (marked “DIST L”) is the VCA distortion trim for the left channel audio path.
RV9 (marked "VCA GAIN”) fine tunes the VCA gain pre the fader.
TELCO INPUT MODULE (2003)
AUDIO LEVEL PRE-SET CONTROLS
RV1 pre-sets the channel input gain.
LINK 1 (marked “Filter”) - Set to the A position, the internal bandpass filter will be activated, filtering out unwanted
signals below 300Hz and above 3kHz. Set to the B position the module will operate with the normal "flat" frequency
response.
LOGIC OPTIONS
CUE RESET - It is possible to pre-programme three alternative methods of resetting from cue to
normal monitoring. LINK 2 (marked "cue") controls the options.
1. Link set to “A”: Cue will reset when the channel is ON and the fader then opened. Cue mode can therefore only be
selected if fader is closed, or channel is OFF with the fader open.
2. Link set to “B”: Cue will reset when the channel is either ON or OFF and the fader is then opened. Cue mode can
therefore only be selected with fader closed.
3. Link Removed: Cue mode can be selected or deselected via front panel switch regardless of channel status.
N.B. With either option 1 or 2 the operator is prevented from selecting “cue” if the fader is open thus preventing
accidental cueing of open channels.
SW8 (1) Controls the options for use with a profanity delay unit. Set to the OFF position, the channel will switch to
OFF when the DUMP button is pressed, thereby removing the channel from air but keeping the call on hold. Set to
the ON position, the channel will both switch OFF and drop the line hold when the DUMP button is pressed.
SW8 (2) When set to ON the front panel HOLD button is defeated. This allows interfacing to certain makes of
telephone systems.
SW8 (3) When set to ON this switch allows a caller to hear the presenter, via the talkback microphone, when the
caller is on hold and the channel is in cue.
SW8 (4) Allows the telco channel to be assigned to the MIC TIMER when set to the ON position, the MIC TIMER will
reset and count when the channel is ON and the fader opened, or the channel is switched on with the fader already
open.
The following additional pre-set controls will be found on the board. They are all factory pre-set controls and should
therefore not be adjusted.
RV4 is the VCA distortion trim for the right channel audio path.
RV5 is the VCA distortion trim for the left channel audio path.
RV7 fine tunes the VCA gain pre the fader.

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OUTSIDE SOURCE MODULE (2004)
In all cases the default position is Position A.
LK1 and LK3 (operate as a pair)
Position A = auxiliary inputs omitted from PGM audio.
Position B = auxiliary inputs mixed with PGM audio.
LK2 and LK4 (operate as a pair)
Position A = auxiliary inputs omitted from REC audio.
Position B = auxiliary inputs mixed with REC audio.
LK5, LK7, LK9 and LK11 (operate together)
Position A = stereo cue feeds.
Position B = mono cue feeds (available on L and R).
LK6 and LK10 (operate as a pair)
Position A = selected source receives both cue audio and talkback.
Position B = selected source receives talkback only.
LK8 and LK12 (operate as a pair)
Position A = unselected sources receive both cue audio and talkback.
Position B = unselected sources receive talkback only.
LK13
Position A = CUE reset by fader opening when channel on.
Position B = CUE reset by fader opening only.
LK14 (source 1), LK15 (source 2), LK16 (source 3) and LK17 (source 4)
Position A = cue output receives programme feed when source selected.
Position B = cue output receives cleanfeed when source selected.
Put all links in Position A when remote cleanfeed selection is to be used.
LK18
Position A = ON opto output is momentary.
Position B = ON opto output is continuous.
LK19
Position A = OFF opto output is momentary.
Position B = OFF opto output is continuous.
LK20
Position A = channel able to control event timer.
Position B = channel unable to control event timer.
LK21
Position A = ON opto operates regardless of fader position.
Position B = ON opto operates only when fader open.
OUTPUT ‘On-Air’ MODULE (2006)
This module has a single link, which controls the way in which the OFF-LINE RECORD bus works. With the link in
position “A” the output of the record bus will follow that of the main programme bus when none of the input
channels are diverted to it. Once an input module is diverted to the bus (via the front panel switch) the bus
only carries the output of those channels diverted to it.

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With the link selected to position “B” the off-line record bus only carries the output of those channels selected to it.
Therefore, if no channels are diverted to the bus there will be no output.
CONTROL ROOM MONITOR (2007)
This module has a single link which in the “A” position will give a mono cue on the mono meter (the stereo meters
will continue to show programme output during cue). In position “B” cue will be presented on the left and right
meters in stereo. (The mono meter will continue to show a mono of programme output during cue).
TALKBACK MODULE (2010)
This module has a single link which in position “A” activates the control-room red light when talkback is operated
form the control room. This position also prevents talkback from being heard in the presenter's headphones when
any microphones are “live”. In position “B” operation of talkback does not operate the control-room red light and
incoming talkback will interrupt the presenter's headphones when microphones are “live”.
TIMERS –JUMPER ASSIGNATION
Jumper To left of board To right of board Default
LK1 LK1,2,3 together set the freeze time Left
LK2 of the PGM timer as it is reset. Left
LK3 All left = min. time, all right = max. time Left
LK4 Test mode on Test mode off Right
LK5 MIC timer leading MIC timer leading Right
zero blanking on zero blanking off
LK6 PGM timer trigger PGM timer trigger Left
LK7 active low active high Left
CONNECTIONS
DUAL INPUT MICROPHONE MODULE (2001R)
BALANCED AUDIO - 1 x 3 pin XLR female socket per input, 2 inputs per channel.
Pin 1 –Screen
Pin 2 –Audio + ('HOT')
Pin 3 –Audio - (‘COLD’)
Insert Point Send 3 pole ‘A’ jack socket (Tip = Audio +; Ring = Audio -; Sleeve = screen)
Insert Point Return 3 pole ‘A’ jack socket (Tip = Audio +; Ring = Audio -; Sleeve = screen)
LOGIC - 15 Way 'D' type female socket on rear panel
Pin Function
01 0v LOGIC
.... 09 Remote ON A (active low) I/P
02 ON LAMP TALLY A (12Vdc, 3OmA) 0/P
....10 Remote ON B (active low) I/P
03 ON LAMP TALLY B (12Vdc, 3OmA) 0/P
.... 11 0v LOGIC
04 Remote OFF A (active low) I/P
.... 12 OFF LAMP TALLY A (12Vdc, 3OmA) 0/P

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05 Remote OFF B (active low) I/P
.... 13 OFF LAMP TALLY B (12Vdc, 3OmA) 0/P
06 0v LOGIC
....14 TALKBACK A (active low) I/P
07 TALKBACK B (active low) I/P
....15 COUGH A (active low) I/P
08 COUGH B (active low) I/P
DUAL INPUT STEREO LINE MODULE (2002R)
BALANCED AUDIO - 2 x 3 pin XLR female sockets per input - 2 inputs per channel
Pin 1 –Screen
Pin 2 –Audio + (HOT)
Pin 3 –Audio - (COLD)
(For unbalanced use connect 'HOT' to pin 2, screen to pin 1 and link pins 1 & 3 together)
LOGIC - 25 Way 'D' type female socket on rear panel
Pin Function
01 0v LOGIC
.... 14 ON remote switch (active low) I/P
02 ON LAMP TALLY (12Vdc, 3OmA) 0/P
.... 15 0v LOGIC
03 OFF remote switch (active low) I/P
.... 16 OFF LAMP TALLY (12Vdc, 3OmA) 0/P
04 0v LOGIC
.... 17 PLAY A (active low) I/P
05 PLAY A (active high) I/P
.... 18 PLAY B (active low) I/P
06 PLAY B (active high) I/P
.... 19 0v LOGIC
07 READY A (active low) I/P
.... 20 READY A (active high) I/P
08 READY B (active low) I/P
.... 21 READY B (active high) I/P
09 0v LOGIC
.... 22 ON input A (OPTO+) O/P
10 ON input A (OPTO-) O/P
.... 23 OFF input A (OPTO+) O/P
11 OFF input A (OPTO-) O/P
.... 24 ON input B (OPTO+) O/P
12 ON input B (OPTO-) O/P
.... 25 OFF input B (OPTO+) O/P
13 OFF input B (OPTO-) O/P
TELCO MODULE (2003R)
SEND - (to hybrid) 3 PIN XLR Male
RETURN - (from hybrid) 3 PIN XLR Female
Pin 1 –Screen
Pin 2 –Audio + (HOT)
Pin 3 –Audio - (COLD)
(For unbalanced use connect 'HOT' to pin 2, Screen to pin 1 and link pins 1 & 3 together)

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LOGIC - 15 Way 'D' type female socket on rear panel
Pin Function
01 0v LOGIC
....09 ON remote (active low) I/P
02 ON LAMP TALLY (12Vdc, 3OmA) 0/P
.... 10 0v LOGIC
03 OFF remote (active low) I/P
.... 11 OFF LAMP TALLY (12Vdc, 3OmA) 0/P
04 0v LOGIC
....12 HOLD (active low) I/P
05 0v LOGIC
....13 EXT HOLD LINE (active low) (constant) I/P
06 EXT HOLD LINE (active high) (constant) I/P
.... 14 N/C
07 LINE HOLD (OPTO+) 0/P
....15 LINE HOLD (OPTO-) 0/P
08 N/C
OUTSIDE SOURCE MODULE (2004R)
CUE OUTPUTS - 25 way ‘D’ type male plug
Pin Function
1 Cue Output 1L GND
….14 Cue Output 1L +
2 Cue Output 1L -
….15 Cue Output 1R GND
3 Cue Output 1R +
….16 Cue Output 1R -
4 Cue Output 2L GND
….17 Cue Output 2L +
5 Cue Output 2L -
….18 Cue Output 2R GND
6 Cue Output 2R +
….19 Cue Output 2R -
7 Cue Output 3L GND
….20 Cue Output 3L +
8 Cue Output 3L -
….21 Cue Output 3R GND
9 Cue Output 3R +
….22 Cue Output 3R -
10 Cue Output 4L GND
….23 Cue Output 4L +
11 Cue Output 4L -
….24 Cue Output 4R GND
12 Cue Output 4R +
….25 Cue Output 4R -
13 GND
SOURCE INPUTS - 25 way ‘D’ type female socket
Pin Function
1 Input 1L GND
….14 Input 1L +
2 Input 1L -

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….15 Input 1R GND
3 Input 1R +
….16 Input 1R -
4 Input 2L GND
….17 Input 2L +
5 Input 2L -
….18 Input 2R GND
6 Input 2R +
….19 Input 2R -
7 Input 3L GND
….20 Input 3L +
8 Input 3L -
….21 Input 3R GND
9 Input 3R +
….22 Input 3R -
10 Input 4L GND
….23 Input 4L +
11 Input 4L -
….24 Input 4R GND
12 Input 4R +
….25 Input 4R -
13 GND
LOGIC I/O - 25 way ‘D’ type female socket on rear panel
Pin Function
1 Auxiliary input L GND
….14 Auxiliary input L +
2 Auxiliary input L -
….15 Auxiliary input R GND
3 Auxiliary input R +
….16 Auxiliary input R -
4 Remote ON input (closing contact to LGND required)
….17 GND
5 Remote OFF input (closing contact to LGND required)
….18 ON tally output (+12V, 30mA current limit –active high)
6 GND
….19 OFF tally output (+12V, 30mA current limit –active high)
7 ON opto output + (collector of uncommitted opto-transistor)
….20 ON opto output - (emitter of uncommitted opto-transistor)
8 OFF opto output + (collector of uncommitted opto-transistor)
….21 OFF opto output - (emitter of uncommitted opto-transistor)
9 Remote cleanfeed select input, active high (5-18V required)
….22 LGND
10 Remote cleanfeed select input, (active low) closing contact
….23 N/C
11 LGND
….24 N/C
12 Talkback active output (+12V, 30mA –active high)
….25 GND
13 +12V utility supply, 50mA current limited

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STUDIO MONITOR (2005R)
CONNECTOR 1 - 25 Way 'D' type male plug on rear panel –RIGHT
Pin Function
01 Screen
...14 + audio ‘Definable input 1’ RIGHT
02 - audio
...15 Screen
03 + audio ‘Definable input 2’ RIGHT
...16 - audio
04 Screen
...17 + audio ‘Definable input 3’ RIGHT
05 - audio
...18 Screen
06 + audio ‘Definable input 4’ RIGHT
...19 - audio
07 Screen
...20 + audio ‘Definable input 5’ RIGHT
08 - audio
...21 Screen
09 + audio ‘AIR’ RIGHT
...22 - audio
10 Screen for PRESENTER HEADPHONES ONLY
...23 Left PRESENTER HEADPHONES OUTPUT
11 Right
...24 Screen for GUEST HEADPHONES ONLY
12 Left GUEST HEADPHONES ONLY
...25 Right
13 N/C
CONNECTOR 2 - 25 Way 'D' type male plug on rear panel –LEFT
Pin Function
01 Screen
…14 + audio ‘Definable input’ LEFT
02 - audio
…15 Screen
03 + audio ‘Definable input 2’ LEFT
…16 - audio
04 Screen
…17 + audio ‘Definable input 3’ LEFT
05 - audio
…18 Screen
06 + audio ‘Definable input 4’ LEFT
…19 - audio
07 Screen
…20 + audio ‘Definable input 5’ LEFT
08 - audio
…21 Screen
09 + audio ‘AIR’ LEFT
…22 - audio
10 Screen - STUDIO MON SPEAKERS
...23 Left STUDIO MON SPEAKERS (unbalanced)
11 Right STUDIO MON SPEAKERS (unbalanced)
...24 N/C

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12 N/C
...25 N/C
13 N/C
CONNECTOR 3 - 9 Way 'D' type female socket on rear panel
Pin Function
01 Ground
...06 Mute (active high) I/P
02 Mute (active low) I/P
...07 Mute (OPTO+) O/P
03 Mute (OPTO -) O/P
...08 N/C
04 N/C
...09 Ground
05 Studio Red light (12Vdc, 30mA) O/P
OUTPUT/ON AIR MODULE (2006R)
MATRIX LOGIC Connector 1 - 9 way 'D' type female socket on rear panel
(Switched momentary to 0v logic)
Pin Function
01 0v LOGIC
...06 AIR LED (active low)
02 AIR Switch
...07 OFFER LED (active low)
03 OFFER Switch
...08 DELAY LED (active low)
04 Delay Switch
...09 DUMP LED (active low)
05 DUMP Switch
USER DEFINABLE SWITCHES Connector 2 - 25 Way 'D' type female socket on rear panel
Pin Function
01 GROUND
...14 LED 1 (active high) I/P
02 LED 1 (active low) I/P
…15 SWITCH 1 pole
03 SWITCH 1 pole
...16 GROUND
04 LED 2 (active high) I/P
...17 LED 2 (active low) I/P
05 SWITCH 2 pole
...18 SWITCH 2 pole
06 GROUND
...19 LED 3 (active high) I/P
07 LED 3 (active low) I/P
...20 SWITCH 3 pole
08 SWITCH 3 pole
...21 GROUND
09 LED 4 (active high) I/P
...22 LED 4 (active low) I/P
10 SWITCH 4 pole
...23 SWITCH 4 pole

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11 GROUND
...24 LED 5 (active high) I/P
12 LED 5 (active low) I/P
...25 SWITCH 5 pole
13 SWITCH 5 pole
MAIN OUTPUTS - 25 Way 'D' type male plug on rear panel
Pin Function
…01 Screen
14 + PGM OUTPUT LEFT 1
…02 -
15 Screen
...03 + PGM OUTPUT RIGHT 1
16 -
...04 Screen
17 + PGM OUTPUT LEFT 2
…05 -
18 Screen
...06 + PGM OUTPUT RIGHT 2
19 -
...07 Screen
20 + RECORD OUTPUT LEFT
...08 -
21 Screen
...09 + RECORD OUTPUT RIGHT
22 -
...10 Screen
23 + AUX OUTPUT LEFT
...11 -
24 Screen
...12 + AUX OUTPUT RIGHT
25 -
…13 N/C
CONTROL ROOM MONITOR MODULE (2007R)
CONNECTOR 1 - 25 Way 'D' type male plug on rear panel
Pin Function
01 Screen
…14 + audio ‘Definable input 1’ LEFT
02 - audio
…15 Screen
03 + audio ‘Definable input 2’ LEFT
…16 - audio
04 Screen
…17 + audio ‘Definable input 3’ LEFT
05 - audio
…18 Screen
06 + audio ‘Definable input 4’ LEFT
…19 - audio
07 Screen
…20 + audio ‘Definable input 5’ LEFT
08 - audio
…21 Screen

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09 + audio ‘AIR’ LEFT
…22 - audio
10 Screen
…23 Left Control Room Monitor Speakers Output (unbalanced)
11 Right
…24 Screen
12 Cue/incoming talkback Output (muted by CR Red Light) (unbalanced)
…25 Screen
13 N/C
CONNECTOR 2 - 25 Way 'D' type male plug on rear panel
Pin Function
01 Screen
…14 +audio ‘Definable input’ RIGHT
02 - audio
…15 Screen
03 + audio ‘Definable input 2’ RIGHT
…16 - audio
04 Screen
…17 + audio ‘Definable input 3’ RIGHT
05 - audio
…18 Screen
06 + audio ‘Definable input 4’ RIGHT
…19 - audio
07 Screen
…20 + audio ‘Definable input 5’ RIGHT
08 - audio
…21 Screen
09 + audio ‘AIR’ RIGHT
…22 - audio
10 Screen for CONTROL ROOM HEADPHONE OUTPUT ONLY
…23 Left CONTROLHEADPHONEOUTPUT
11 Right
…24 Screen for GUEST HEADPHONE OUTPUT ONLY
12 Left GUESTHEADPHONEOUTPUT
…25 Right
13 Screen
CONNECTOR 3 - 15 Way 'D' type female socket on rear panel
Pin Function
01 Audio ground
…09 Talkback + audio inject
02 Talkback - audio inject
…10 0v LOGIC
03 Talkback enable (active high) I/P
…11 Talkback enable (active low) I/P
04 0v LOGIC
…12 Mute enable (active high) I/P
05 Mute enable (active low) I/P
…13 Mute out (opto+) O/P
06 Mute out (opto-) O/P
…14 0v LOGIC
07 Red light - control room (12Vdc, 3OmA) O/P
…15 0v LOGIC

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08 Red light –studio (12Vdc, 3OmA) O/P
8 WAY INPUT EXTENDER (2008R)
AUDIO INPUTS - LEFT - 25 Way 'D' type female socket on rear panel
Pin Function
...01 Screen
14 + audio INPUT 1 LEFT
...02 - audio
15 Screen
...03 + audio INPUT 2 LEFT
16 - audio
...04 Screen
17 + audio INPUT 3 LEFT
...05 - audio
18 Screen
...06 + audio INPUT 4 LEFT
19 - audio
...07 Screen
20 + audio INPUT 5 LEFT
...08 - audio
21 Screen
...09 + audio INPUT 6 LEFT
22 - audio
...10 Screen
23 + audio INPUT 7 LEFT
...11 - audio
24 Screen
...12 + audio INPUT 8 LEFT
25 - audio
...13 N/C
AUDIO INPUTS - RIGHT - 25 Way 'D' type female socket on rear panel
Pin Function
01 Screen
...14 + audio INPUT 1 RIGHT
02 - audio
...15 Screen
03 + audio INPUT 2 RIGHT
...16 - audio
04 Screen
...17 + audio INPUT 3 RIGHT
05 - audio
...18 Screen
06 + audio INPUT 4 RIGHT
...19 - audio
07 Screen
...20 + audio INPUT 5 RIGHT
08 - audio
...21 Screen
09 + audio INPUT 6 RIGHT
...22 - audio
10 Screen
...23 + audio INPUT 7 RIGHT

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11 - audio
...24 Screen
12 + audio INPUT 8 RIGHT
...25 - audio
13 N/C
AUDIO OUTPUTS - 1 5 Way 'D' type male connector on rear panel
Pin Function
01 Screen
...09 + audio OUTPUT A LEFT
02 - audio
...10 Screen
03 + audio 0UTPUT B LEFT
...11 - audio
04 Screen
...1 2 + audio 0UTPUT A RIGHT
05 - audio
...13 Screen
06 + audio 0UTPUT B RIGHT
...14 - audio
07 N/C
...15 N/C
08 Chassis
TAPE REMOTE (2009R) –Discontinued
TAPE 1/2/3 LOGIC - 25 Way 'D' type female socket on rear panel
Pin Function Tape1/ Tape2/ Tape3
01 Ground
...14 RECORD (active low) J5 J10 J15
02 RECORD (active high)
…15 STOP (active low) J6 J11 J16
03 STOP (active high)
...16 PLAY (active low) J7 J12 J17
04 PLAY (active high)
...17 REWIND (active low) J8 J13 J18
05 REWIND (active high)
...18 FAST FORWARD (active low) J9 J14 J19
06 FAST FORWARD (active high)
...19 RECORD closing pair
07 RECORD closing pair
...20 STOP closing pair
08 STOP closing pair
...21 PLAY closing pair
09 PLAY closing pair
...22 REWIND closing pair
10 REWIND closing pair
...23 FAST FORWARD closing pair
11 FAST FORWARD closing pair
...24 N/C
12 N/C
...25 N/C
13 Ground