Funktion-one XO-1 User manual

XO-1 Users Manual

XO1 Operators Manual Page 1
XO1 Quick Reference
Accessing channels: Use channel’s SELECT button.
First press accesses that channel’s gain.
Second press accesses last viewed parameter.
Third press will drop back to the default screen.
To scroll through a channel’s parameters, use the
BACK and NEXT keys.
Accessing menus: Press the MENU key, then the
BACK and NEXT keys to find the sub-menu
required, and select using the ENTER key. This
applies to all levels of menu; ENTER always confirms
selections.
The Menus and their Contents
Input Setup Sub-menu: Used for ganging input gain
and base delays.
X-over Sub-menu: Used for storage and recall of
crossovers, including format, output EQ, output delay,
output gain, and limiter settings. Also used for design
of new crossovers.
Security Sub-menu: Used for locking various
features of the units, using a four digit code.
System Sub-menu: Used to view the units status,
and select various global options such as parametric
EQ ‘Q’ or bandwidth units, and output meter
monitoring point (pre or post mute).
Notes
The crossover and output settings are stored and
recalled independently (using store/recall a X-Over)
from the input settings (using store/recall input
memory).
The output meters show level, in dB, from the limiter
threshold. The input meters show level, in dB, from
input clip.
The high and low-pass filters are defined independently
on each channel.
To access the limiter attack and release parameters,
select “Auto Limiter TC: No” when designing a
crossover.
To swap parametric filter units between bandwidth
(‘BW’) and ‘Q’, enter the ‘System sub-menu, select
‘Filter Q or BW’, and select required readout units.

Page 2 XO1 Operators Manual
Contents
XO1 Quick Reference 1
The Menus and their Contents 1
Notes 1
Contents 2
Important Safety Information 4
Thanks 5
Unpacking the XO1 5
Introduction 6
Features 6
Front Panel Familiarisation 8
Rear Panel Connections 9
Operating the XO1 10
Preliminary Set-up 10
XO1 Configurations 11
Introduction 11
2 x 2 way with Mono Sum 11
2 x 3 way 12
4 way + 2 13
5 way + 1 14
6 way 15
Screen Layouts Overview 16
Gain Screen 17
Polarity Screen 18
Delay Screen 19
High and Low Pass Filter Screens 20
Parametric Equaliser Screen 21
Limiter Screen 22
Menu Selection 23
Input Setup Sub-menu 24
Gang Inputs 24
X-over Sub-Menu 25
Load a Xover 25
Design a Xover 25
Store a Xover 25
Erase a Xover Mem 25
Security Sub-Menu 26
User Specific 26
Xover Only 26
Xover + Trim 26
Xover + Trim + Mute 26
Changes Only 26
Changes + View 26
Changes + Mutes 26
EVERYTHING 26
Entering the Password to Complete the Locking Operation 27

XO1 Operators Manual Page 3
System Sub-Menu 28
System Status 28
LCD Contrast 28
LED Brightness 28
Temperature Alarm 28
Wake-up Time 28
Output Meters 28
Filter Q or BW 28
Delay Time/Distance 28
Interface Sub-Menu 29
Interface Setup 29
AES / EBU Sub-Menu 30
Routing Options 30
AES Diagnostics 30
AES / EBU Connections 30
Operating Notes 31
Operating Level 31
Grounding 31
Crossover Filter Slopes 32
Time Alignment 32
Output Limiters 33
Setting Accurate Limiter Thresholds 34
Specifications 36
Warranty 37
Options and Accessories 37
Appendices 38
Appendix 1: Limiter threshold in dB to Vrms lookup table. 38
Appendix 2: Default X-over settings and names for all formats. 39
Appendix 3: Equalisation Curves 40

Page 4 XO1 Operators Manual
An example of this equipment has been tested and found to comply with
the following European and international Standards for Electromagnetic
Compatibility and Electrical Safety:
Radiated Emissions (EU): EN55013-1 (1996)
RF Immunity (EU): EN55103-2 (1996) RF Immunity, ESD, Burst Transient, Surge,
Dips &Dwells
Electrical Safety (EU): EN60065 (1993)
Important Safety Information
Do not remove Covers.
No user serviceable parts inside, refer servicing to qualified service personnel.
This equipment must be earthed.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
DO NOT EXPOSE TO RAIN OR MOISTURE
ATTENTION
RISQUE DE CHOC ELECTRIQUE
NE PAS ENLEVER
NE PAS EXPOSER A LA PLUIE NI A L’HUMITE
It should not be necessary to remove any protective earth or signal cable shield connections.
Do not defeat the purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding type plug has two blades and a third
grounding prong. The wider blade and the third prong are provided for your safety. When the
provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete
outlet.
Only use this equipment with an appropriate mains cord.
In the USA the cord should comply with the requirements contained in the Standard for Cord
Sets and Power Supply Cords, UL 817, be marked VW-1, and have an ampacity rating not less
than the marked rating of the apparatus.

XO1 Operators Manual Page 5
Thanks
Thank you for choosing the XO1 for your application. Please spend a little time
reading through this manual, so that you obtain the best possible performance from
the unit.
All our products are carefully designed and engineered for cutting-edge performance
and world-class reliability. If you would like further information about this or any
other product, please contact us.
We look forward to hearing from you in the near future.
UnpackingtheXO1
After unpacking the unit, please check it carefully for any damage. If any is found,
immediately notify the carrier concerned - you, the consignee, must instigate any
claim. Please retain all packaging in case of future re-shipment.

Page 6 XO1 Operators Manual
Introduction
The XO1 is a powerful DSP based audio processor, ideally suited for live sound
applications, where it combines the functions of a multitude of conventional products
in a compact 1U unit. To achieve this, the XO1 has two inputs and six outputs which
can be configured in five basic crossover modes – 3 x 2 way; 2 x 3 way; 4 way; 5 way;
and 6 way.
Each input has a gain control, and variable base delay. Each output has a gain control,
variable delay, high and low pass filters, five bands of fully parametric equalisation,
polarity switching and, additionally, a fully featured limiter.
Multi-part security lock-out is available for all controls.
The XO1 is also available with optional AES/EBU digital inputs and outputs.
It has been designed for quick, intuitive adjustment through the use of multiple
controls to provide an easy-to-use interface.
Features
Superb audio quality – carefully optimised double precision signal processing coupled
with a 40-bit internal data path ensures a dynamic range in excess of 110dB. The high
sampling rate means minimal filtering providing exceptional sonic purity.
A flexible 2-input/6-output multi-mode format caters for any crossover configuration,
regardless of scale.
A total of 30 parametric equalisation bands are available, each providing +15 to –
30dB of gain at centre frequencies between 20Hz and 20kHz, with a wide range of
‘Q’s available between 0.4 to 128. All parameters feature fine resolution with 1/36
octave frequency steps, 0.1dB gain increments, and 100 ‘Q’ settings. Any parametric
section can also be set to operate as a high or low shelving filter.
Each output features a high performance limiter, provided with complete control
over attack, release and threshold parameters. To aid set-up, the output meters
show headroom to the limiter threshold, and use time constants that track those of
the limiter to display precise power usage.

XO1 Operators Manual Page 7
Each output features variable high and low pass filters, with a choice of 12, 18 or
24dB/Octave roll-off, and Butterworth, Bessel or Linkwitz-Riley responses.
Independent control of each high and low pass filter allows asymmetric crossover
bands to be created.
Delay of up to 650mS may be independently set for each output, with an
exceptionally fine minimum increment of 2.6µS.
Three velocity-sensitive encoders provide a familiar and intuitive control format with
all filter information displayed simultaneously on a backlit LCD screen.
AES/EBU Digital input and output interfaces are available as an option.
Input and output balancing transformers are also available as an option.

Page 8 XO1 Operators Manual
Front Panel Familiarisation
LCD Screen : shows menu options,
channel information, and various
parameters as they are adjusted.
Next Key : moves forwards through the list of available parameters.
Back Key : moves back through the list of available parameters.
Menu Key : activates the main menu. A second press selects the last
menu edited. Selection of different menus may be accomplished using
the Back and Next keys, or by turning the ‘Freq’ encoder.
Enter Key : enters the chosen menu and confirms choices.
Bypass Key : bypasses the currently selected parametric EQ section. Note that,
for safety reasons, the high and low pass filters cannot be bypassed using this key.
Quit Key : exits the menu.
Encoders : three velocity sensitive controls allow the relative
parameter displayed on the LCD screen to be adjusted.
PC Card : PCMCIA card slot allows back-up of input memory
sets, unit cloning data and facilitates the download of software
updates.
SELECT Keys : one for each input and output, allowing instant
access to the gain screen for the selected channel. The
accompanying LED illuminates whilst editing is active.
Input Meters : display available headroom below clipping. The
yellow ‘-6dB’ LED illuminates at 6dB below the actual clipping point
of the input section. The red ‘Clip’ LED shows digital overflow and can therefore
illuminate independently of the rest of the meter.
Output Meters: display headroom below limiting. The yellow
LED illuminates 3dB below limiting for that channel. The red
LED indicates the onset of limiting.
Mute Keys: mutes the appropriate channel, and illuminates the
associated LED.

XO1 Operators Manual Page 9
Rear Panel Connections
Power Switch: turns the units mains supply off and
on.
Mains Fuse: located in a finger-proof holder adjacent
to the mains inlet. A spare fuse is also located in this
holder.
Mains Inlet: connected via a standard IEC socket.
External: RS232 standard via a 9 pin D-type
connector, for connection to a PC, enabling the
uploading of new software to the unit.
Audio In-Out: 3 pin XLR sockets are provided for
each channel. All are fully balanced, pin 2 hot, 3 cold,
1 screen.
Always replace the fuse with the correct type and rating as shown on
the rear panel legend.

Page 10 XO1 Operators Manual
OperatingtheXO1
Preliminary Set-up
The procedure below should be followed when first installing a XO1.
Design your crossover! To do this, press MENU, and use the BACK or NEXT key to
select ‘X-over sub-menu’ and then press ENTER. Use the BACK or NEXT key to
select ‘Design a X-over’ and then press ENTER. Finally, use the BACK or NEXT key
to select the desired configuration and follow the set-up wizard to finalise your
design.
Note that when in a menu, ENTER is always used to confirm selections. The current
selection is marked with an asterisk ‘*’.
Use the SELECT keys on each output channel with the BACK and NEXT keys to
select the high pass filters, low pass filters, parametrics etc. Note that when
designing a new crossover, the high and low pass filters will be set to default values.
See appendix 2 for more information.
Use the SELECT keys on each input channel with the BACK and NEXT keys to select
the gain, delay and parametrics available on each input.
Note that if no action is taken in menu mode, the unit will return to normal
‘default’ mode after about twenty (20) seconds. Repeat the above
directions to return to menu mode.

XO1 Operators Manual Page 11
XO1Configurations
Introduction
To simplify the set-up of the XO1, 5 crossover modes are selectable from the X-over
sub-menu. These all have parametric equalisers, high and low pass filters, gain
controls, delay and limiters. The following set of diagrams detail how each of the five
modes is internally configured. Note that the 2 x 3 way and 3 x 2 way modes also
offer the option of ganged parameter adjustment for stereo systems.
2 x 2 way with Mono Sum
This format feeds input A to outputs 1 and 2, designated low and high respectively.
Input B feeds outputs 3 and 4, low and high respectively. Outputs 5 and 6 are both
fed from the sum of inputs A and B. Output 6 is a full bandwidth output by default,
with output 5 being bandwidth limited as a sub output.

Page 12 XO1 Operators Manual
2 x 3 way
This format feeds input A to outputs 1, 2, and 3 designated low, mid, and high
respectively. Input B feeds outputs 4, 5, and 6, as low, mid, and high respectively.
Note that this configuration, as with the 2 x 2 way, can have the outputs ganged for
stereo operation. This gangs outputs 1 & 4, 2 & 5, and 3 & 6, so that they track
identically. It can be selected or modified by entering the ‘Design a Xover’ function
again.

XO1 Operators Manual Page 13
4 way + 2
This format feeds input A to outputs 1, 2, 3, and 4 designated low, lo-mid, hi-mid and
high respectively. Outputs 5 and 6 are configured as auxiliaries, with their source
being either input B, or the sum or inputs A and B.

Page 14 XO1 Operators Manual
5 way + 1
This format feeds input A to outputs 1, 2, 3, 4, and 5 designated sub, low, lo-mid, hi-
mid and high respectively. Output 6 is configured as an auxiliary, with the source
being either input B, or the sum or inputs A and B.

XO1 Operators Manual Page 15
6 way
This format feeds input A to all outputs designated lo-sub, through high, 1 to 6
respectively.

Page 16 XO1 Operators Manual
ScreenLayoutsOverview

XO1 Operators Manual Page 17
AudioFunctionScreens
Gain Screen
To adjust the gain:
Use the ‘GAIN’ control.
Each input and output has an individual gain screen. The inputs have a range of +6dB
to –40dB, adjustable in 0.1dB steps and the outputs have a range of +15dB to –
40dB, again adjustable in 0.1dB steps.
For further details on this topic, see the section entitled
“Operating Level” on page 31.

Page 18 XO1 Operators Manual
Polarity Screen
To adjust the polarity:
Use the ‘GAIN’ control to switch between + and -.
Each output has an independent polarity screen. This gives the flexibility to reverse
(flip by 180q) the phase of individual outputs.
Note: When the outputs are ganged, the polarity screens remain
individual.

XO1 Operators Manual Page 19
Delay Screen
To adjust delay settings:
Use the ‘FREQ’ control for coarse control. (1mS steps)
Use the ‘Q’ control for fine control. (2.6PS steps)
Each input and output has an independent delay time control. Input delay (base delay)
is adjustable in 1mS steps. Output delay is adjustable in 2.6PS steps or in 1mS steps
giving complete control over driver time alignment.
The combination of input (base) delay and output delay can be a maximum of 650mS.
So, for example, setting a base delay of 500mS on input A will only leave 150mS for
any outputs that are sourced from input A. The exception to this rule is for any ‘aux’
outputs (available in 4 and 5 way crossover modes). Choosing the source as a mono
sum (Inputs A + B) will allow 650mS of output delay, regardless of the input delay
settings.
For further details on this topic, see the section entitled
“Time Alignment” on page 32.