XTA DP6i User manual

Page 2 DP6i Operators Manual

DP6i Operators Manual Page 3
00
DP6i
DP6iDP6i
DP6i QuickReference
THINGS YOU NEED TO KNOW
The parameters and their values are listed in the table below.
Parameter Values Notes
ID NUMBER 00 - 32 Shadow ID’s only available when interface is set
to ‘slave’ (INTERFACE 06 - 08)
INTERFACE 00 Master RS232 38400 baud
01 Master RS485 38400 baud
02 Master RS232 19200 baud
03 Master RS485 19200 baud
04 Master RS232 9600 baud
05 Master RS485 9600 baud
06 Slave RS485 38400 baud
07 Slave RS485 19200 baud
08 Slave RS485 9600 baud
09 Master RS232 38400 baud & Wiser Wireless
MIDI Of MIDI Relay Off
01 - 16 MIDI Relay ON channel specific – only available
when Interface is set to ‘Master’ (00 - 05)
Al Midi Relay ON omni on
AES AA Analogue in – Analogue out
Ad Analogue in – Digital out
DA Digital in – Analogue out
DD Digital in – Digital out – if no AES interface is
fitted or interface is set to ‘Slave (06 – 08),
display will be fixed at AA
GPI of GPI OFF – if no GPI interface fitted, display will
be fixed at Off
on GPI ON – works in ‘simple’ mode only
By default, the LED display shows the last recalled memory
number as long as the memory hasn’t been edited remotely – then
it will display .
The memories cannot be recalled using the quick access keys
unless the unit is in the default mode – i.e. no yellow parameter
LEDs are illuminated (with the exception of the ‘Shadow’ LED).
Initially there will be no memories stored in the unit, so the quick
memory recall buttons will not function.
The Mute Unit key will silence the entire unit, but the meters will
continue to function. The remote software is unaware of this mute
function – it is local control only.

Page 4 DP6i Operators Manual
Contents
Important Safety Information 5
Unpacking the DP6i
DP6iDP6i
DP6i 6
Introduction 7
Front Panel Familiarisation 9
Operating the DP6i
DP6iDP6i
DP6i 11
Note about operation with WindowsTM software. 11
Start-up procedure 11
Preliminary Set-up 11
Quick Memory Recall Keys 11
Mute Unit Key 12
Interface Operation Guides 13
RS232 Interface 13
RS232 Connection (Single Unit) 14
Shadow ID Numbers 14
RS485 Interface 16
RS485 Connection 17
Midi Interface 18
Midi Connection 18
GPI Interface 19
Locking the Unit Remotely 20
DP6i Configurations 21
Introduction 21
2 x 2 way with Mono Sum 21
2 x 3 way 22
4 way + 2 23
5 way + 1 24
6 way 25
AES / EBU Operation Guide 26
AES / EBU Connections 26
Operating Notes 27
Operating Level 27
Grounding 27
Crossover Filter Slopes 28
Time Alignment 28
Output Limiters 29
Setting Accurate Limiter Thresholds 30
Specifications 32
Warranty 33
Options and Accessories 33
Appendices 34
Appendix 1: Limiter threshold in dB to Vrms lookup table. 34
Appendix 2: Default X-over settings and names for all formats. 35
Appendix 3: Additional Information: General Purpose Interface 36

DP6i Operators Manual Page 5
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.

Page 6 DP6i Operators Manual
Thanks
Thank you for choosing the XTA DP6i for your application. Please spend a little
time reading through this manual, so that you obtain the best possible performance
from the unit.
All XTA 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 XTA product, please contact us.
We look forward to hearing from you in the near future.
Unpacking the DP6i
DP6iDP6i
DP6i
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.

DP6i Operators Manual Page 7
Introduction
The DP6i is a powerful DSP based audio processor, ideally suited for install
applications, where it combines the functions of a multitude of conventional products
in a compact 1U unit with extensive remote control capabilities. To achieve this, the
DP6i 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, variable delay and eight bands of fully parametric
equalisation. 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.
Remote control1is catered for in the form of MIDI, RS232 and RS485 ports, and
multiple user memories are provided for the storage and recall of settings.. Security
lock-out is available for all controls.
The DP6i is also available with optional AES/EBU digital inputs and outputs.
It may be controlled externally by XTA’s proprietary WindowsTM
software, along with existing and future ‘Audiocore’ products.
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 configuration,
regardless of scale.
♦ A total of 46 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.
1Note that only the RS232 and RS485 interfaces offer full remote control of this product – the MIDI interface may
only be used for memory recall (program change) purposes

Page 8 DP6i Operators Manual
♦ 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.
♦ The comprehensive standard specification also includes 40 memories, and
remote control via MIDI, RS232 or RS485 ports, with security lock-out.
♦ AES/EBU Digital input and output interfaces are available as an option.
♦ Input and output balancing transformers are also available as an option.
♦ A general purpose interface (GPI) is available as a option, allowing simple
remote memory recall without the need to connect a PC.

DP6i Operators Manual Page 9
00
Front Panel Familiarisation
Select Key: Pressing this key will
cycle through the options listed to
the right of the key – each one will
be highlighted in turn, with the LED
display showing the value of the
parameter.
Adjust Keys: Use these keys to
alter the value of the parameter
currently selected. Note that in
certain circumstances, such as where an option is not fitted, (AES or GPI) the value
may not be adjustable.
LED Display: This display shows, by default, the number of the last recalled
memory. If this memory has been edited, the display will show . If a parameter
is being adjusted, the yellow LED beside its name will be illuminated, and the current
value of it will be shown on the display.
Input and Output
Metering: Input meters
show the headroom
available below the
clipping point of the
analogue to digital
converter. They are PRE-
processing, so are not
affected by the gain controls for the inputs or any applied equalisation. If the unit is
clipping internally due to a DSP overflow (too much gain or excessive EQ), both CLIP
LEDs on the inputs will illuminate, regardless of the actual input level, or which
channel is overloading.
Mute Unit Key: Pressing this will instantly mute all the outputs. Note that the
metering will continue to register. The state of this mute will be remembered on
power down. Note that the remote PC controller has no knowledge of this key, as it
is purely a LOCAL mute facility.
Output Meters: These show the headroom below limiting for the outputs.
Adjusting the limiter threshold will cause the meter reading to change. The red LED
illuminates when the level has reached 4dB over the limiter threshold. The ballastics
of these meters are affected by the attack and release settings of the limiter.
Quick Memory Recall
Keys: Pressing one of these
keys will immediately recall
the relevant memory
location. See page 11 for
more details of how this
works.

Page 10 DP6i Operators Manual
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. Data is converted to RS485
standard and relayed to slave units via the RS485 sockets.
Midi IN: 5 pin DIN socket. See page 18 for more
information.
RS485 In-Out: XLR sockets. Used for transmission of
remote control data over long distance or multiple unit
applications. See page 16 for more information.
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.

DP6i Operators Manual Page 11
0
1
00
Operating the DP6i
DP6iDP6i
DP6i
Note about operation with WindowsTM software.
The following operating information covers setup and control of the DP6i via the
front panel controls only. Please consult the manual supplied with this software for
information regarding full computer control.
Start-up procedure
Switching the unit on will cause all the LEDs on the panel to illuminate briefly
including the display showing 8.8., following which the software version number will
be displayed on the LED display, typically 1.0. There will then be a fade up of the
audio over a few seconds which is accompanied by a flashing vv on the display.
Preliminary Set-up
The procedure below should be followed when first installing a DP6i.
 Press the SELECT key so the ID NUMBER LED is illuminated and use the
ADJUST keys to change the LED display to show .
 Press the SELECT key once so the INTERFACE LED is illuminated and use
the ADJUST keys to change the LED display to show . This will select
the RS232 interface and a baud rate of 38000 baud in Master mode.
 Press the SELECT key 4 more times to cycle past MIDI, AES and GPI, so that
all the yellow LEDs are off.
Now, connect the unit to the computer and start Audiocore – please see page 13 for
details of the interfaces and which one is best for your application.
Quick Memory Recall Keys
When the unit is first used, there will be nothing stored in the memories and the
quick recall keys will not appear to do anything. Storing settings into either the first
four input memory or x-over memory locations (or both) will allow these keys to gain
instant access to these configurations.
The rules for what is recalled are simple: If you have stored something in input
memory number ‘N’ and x-over memory number ‘N’, they will both be recalled
when you select ‘N’. If only an input memory is stored at number ‘N’ it will be
recalled on its own, and similarly for the case of only a x-over memory.
Pressing the required quick access key will instantly recall the setting, illuminate the
blue LED and display the number on the LED display. Note that this will change to
00 if the memory is edited remotely after it has been recalled.

Page 12 DP6i Operators Manual
Disabling the Memory Recall Keys
Under certain circumstances it might be preferable to disable the memory recall keys
completely. This can be accomplished by the removal of an internal link on the front
panel.
Mute Unit Key
Pressing the Mute Unit key will instantly silence all outputs, but all metering will
continue to function. Note that Audiocore is unaware of the setting of this key and
once enabled, this cannot be overridden remotely – it takes precedence and is a local
control only.

DP6i Operators Manual Page 13
Interface Operation Guides
As the DP6i has been designed primarily for installation purposes, the choice of
which remote interface to use is very important. This section explains the different
interface options and how to choose the best one for your application.
RS232 Interface
This interface is fitted as standard to all units and is accessed via the 9-pin D-type
connector on the rear of the unit. Note that to connect to a computer’s COM
(serial) port correctly, a one-to-one cable must be used, and NOT a ‘null modem’
cable. A ‘null modem’ cable has the ‘transmit’ and ‘receive’ wires swapped over and
will not work.
The RS232 connection is suitable for distances of about a maximum of 25feet
between the PC and the unit. If you experience problems with the connections,
consider
- selecting a slower baud rate (interface 02 or 04)
- selecting the ‘Use Acknowledge Cmd’ option in Audiocore (see the
Remote Menu > RS232 Configuration window
- running the unit via the RS485 interface
Note than only one unit at a time may be connected to the computer via this
interface. Additional units may be ‘daisy-chained’ via the RS485 connections from the
back of the first one (it acting as a converter for them), but their RS232 ports are not
used.
The RS232 interface may be used for full remote control and metering/monitoring of
the unit.

Page 14 DP6i Operators Manual
RS232 Connection (Single Unit)
A typical interface set-up might involve running an RS232 link from laptop or a
desktop computer to a DP6i set up as a master unit. The diagram below shows this
method of connection, the required menu options are also given. Note that the
RS232 cable must be a 1-1 connection type, NOT a null modem cable (which has
connections crossed internally).
Shadow ID Numbers
Shadow ID numbers allow extra units to share the same ID and follow the settings of
the ‘main’ ID. This is useful for larger systems (for example anything above a 3-way
stereo system) where it is only necessary to set up one side of the system, and allow
the other unit to track it identically.
Using the shadow IDs in this way also reduces the apparent system complexity within
Audiocore. This is due to the fact that shadow ID’s NEVER send back any
settings to Audiocore and because of this will NOT appear in the list of
connected units.
They can be thought of as listening to and acting upon all information addressed to
them, but not replying. Up to 31 shadow units may be connected and assigned the
same ID as the ‘main’ unit, but remember that the maximum total units on any one
RS485 network is 32.
Shadow ID numbers are accessible when the unit’s interface is configured as a slave
(interface types 06 – 08), and will appear after ID number 32, starting from 01 again,
but with the ‘SHADOW’ LED illuminated.

DP6i Operators Manual Page 15
RS232 Connection (Multiple Units)
If control over multiple units is required, typically the slaves will be set up to run from
the RS485 ports on the master DP6i. Note the incremental ‘ID NUMBER’ option in
the unit’s setup.

Page 16 DP6i Operators Manual
RS485 Interface
This interface is fitted as standard to all units and is accessed via the 3-pin XLR
sockets on the rear of the unit. Cables to connect units together or to an RS232-485
converter will need to be wired one-to-one. We recommend the use of standard
shielded microphone cables, or a balanced feed from a multicore.
RS485 is a fully balanced system, capable of sending data over distances of up to one
kilometre. Note, however, that this is the total length of connection. The RS485
output of each unit is purely hardwired from the input and so no electrical
regeneration of the signal is provided. What this means is that the distance from the
first RS485 output to the last RS485 input must not exceed 1km in total.
Cable’ ‘01’ + Cable ‘02’ + …Cable ‘NN’ < 1000 metres

DP6i Operators Manual Page 17
RS485 Connection
To use RS485 communication directly from a computer, a master DP6i must be
configured to receive RS485. You must have a suitable RS485 port on your computer,
or a converter connected to the serial port in use. This configuration is shown below,
along with the required unit setup.
Both the converter and the required adapter cables are available from XTA.
The converter is part number OPT-103A. The adapter is available in a kit which
includes an RJ-45 adapter; the XLR to 9-pin adapter, and the converter itself. This
complete kit is part number INT-485.
If you need to make up one of the XLR to 9-pin adapters, the pin-out is:
XLR D-type
1 1
2 3
3 8

Page 18 DP6i Operators Manual
Midi Interface
NOTE: This interface may only be used to trigger memory recalls.
This interface is fitted as standard to all units and is accessed via the 5-pin DIN socket
on the rear of the unit. A standard MIDI cable (that is a 5pin DIN male to male wired
one-to-one) will be needed to connect the unit to the MIDI interface, be it an
external unit (probably in the case of a laptop) or an internal card (desktop PC).
The MIDI connection will not provide full control/monitoring facilities due to the fact
that it is an input only. However, it does allow for scene changes in any sequencer or
control package that supports MIDI program change messages. The memory map is
given below.
Program Change 1 – 40: Recall INPUT memories 1 - 40
Program Change 65 – 73: Recall INPUT + X-OVER memories 1 - 9
Program Change 97 – 105: Recall X-OVER memories 1 - 9
All other program changes sent to the unit will have no effect.
Midi Connection
To use MIDI communications, the DP6i must be configured to receive as a master
via its MIDI port. You must have a MIDI card or interface connected to your
computer or suitable device. The setup is shown below.

DP6i Operators Manual Page 19
GPI Interface
In certain circumstances the connection of a computer to a DP6i is both impossible
and undesirable, perhaps for reasons of unnecessary complexity and cost.
This is where the general-purpose interface option becomes useful. It permits the
recalling of memories (input, crossover, or both) from a remote location, without the
need for expensive interface controllers. Memories may be recalled using a simple
wired interface.
The configuration and set-up of the interface is covered in Appendix 3 on page 36, as
it is an option that is not fitted as standard.

Page 20 DP6i Operators Manual
LockingtheUnitRemotely
Supplied with the DP6i is a remote locking program. This allows all the connected
units to have their front panel controls locked out, including the Mute Unit key and
the Quick Memory Recall keys.
Starting the program will display a window as shown below.
The connection should be the same as that used via Audiocore to control the unit –
please see the preceding sections for information about this. Audiocore remote
control is still possible when the unit is locked.
Pressing the ‘Lock Units’ button will ask for a password and confirmation of the same
password again. Pressing the ‘OK’ button will send this password to ALL connected
units and lock them. Confirmation of the lock is given by the units briefly showing
LC on their displays. Note that the password is stored in each unit, so if it is
required to give a different password to each unit in a network, they will have to be
connected individually to the computer.
Note that shadow units will be locked at the same time, but must be connected
through a master for the program to work.
There is NO master unlock password – please contact XTA if you need to unlock
your unit. There is a procedure for achieving this (without losing the settings stored
in the unit), but you won’t find details of it here!
Unlocking units is as simple as pressing the ‘Unlock Units’ button, entering the
password, and pressing ‘OK’. Confirmation of the unit(s) unlocking is confirmed by
the display(s) briefly showing uC.