Klark Teknik DN9848 User Manual

DN9848

OPERATORS MANUAL

Klark Teknik Group,

Klark Teknik Building,

Walter Nash Road,

Kidderminster.

Worcestershire.

DY11 7HJ.

England.

Tel:[phone]

Fax:[phone]

Emaill:[e-mail]

Website: www.klarkteknik.com

IMPORTANT SAFETY INSTRUCTIONS

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE

AVIS: RISQUÉ DE CHOC ELETRIQUE. NE PAS OUVRIR

These symbols are internationally accepted symbols that warn of potential hazards with
electrical products.

The lightning flash with arrowhead symbol, within an equilateral
triangle is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product's enclosure that may be of
sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateraltriangle is intended to alert
the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any of the ventilation openings. Install in accordance with the manufacturers
instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that
produce heat.

9. Do not defeat the safety 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 wide blade or 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.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus.

11. Unplug this apparatus during lightning storms or when unused for long periods of time.

12. Refer all testing to qualified personnel. Servicing is required when the apparatus is damaged inany
way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been exposed to rain or moisture, does notoperate normally, or
has been dropped.

Walter Nash Road, Kidderminster, Worcestershire. DY11 7HJ. England

Tel: (44) (0) 1562 741515. Fax: (44) (0) 1562 745371

Company Registration No: 2414018

abc d abc

SIGNAL PROCESSING BY DEFINITI ON BETTERBYDESIGN DESIGNEDFOR APUREPERFORMANCE

DECLARATION OF CONFORMITY

We,

Klark Teknik Group (UK) PLC

of, Klark Teknik Building, Walter Nash Road, Kidderminster, Worcestershire, DY11 7HJ

Declare that a sample of the following product:-

Product Type Number Product Description Nominal Voltage (s) Current Freq

DN9848 115V AC 200mA

230V AC

100mA

to which this declaration refers, is in conformity with the following directives and/or standards:-

Directive(s) Test Standard(s)

Generic Standard Using EN55103 Limits and Methods EN50081/2
Class B Conducted Emissions EN55103
Class B Radiated Emissions EN55103
Fast Transient Bursts EN61000-4-4
Static Discharge EN61000-4-2

50/60Hz

Signed:............................

Date: 1st February, 2000

Name: David Hoare

Authority: Technical Director, Klark Teknik Group (UK) PLC

Attention!
Where applicable, the attention of the specifier, purchaser, installer or user is drawn to special limitations of use
which must be observed when these products are taken into service to maintain compliance with the above
directives. Details of these special measures and limitations to use are available on request and are available
in product manuals.

A Subsidiary of Telex communications, Inc.

Contents

Thank you for using a Klark Teknik product
After you have unpacked
Introduction
Installation and Connection
Rear panel connectors
User interface
Controls
Main menu structure
Save/load routine
System setup menu
Input menu structure
Output
Test mode
Operational example
Technical specification

menu structure

Page 1
Page 2
Page 3
Page 5
Page 6
Page 7
Page 8
Page 11
Page 12
Page 13
Page 18
Page 20
Page 23
Page 24
Page 26

.

Thank You For Using This Klark Teknik Product

To obtain maximum performance from this precision electronic product, please study these
instructions carefully. Installation and operating the DN9848 is not complicated, but the flexibility
provided by its operating features merits familiarisation with its controls and connections. This unit
has been prepared to comply with the power supply requirements that exist in your location.

Precautions

Do not install this unit in a location subjected to excessive heat, dust or mechanical vibration.

Voltage Selection and Power Connection

Connection is made by means of an IEC standard power socket. The rear panel text indicates the
voltage range required for satisfactory operation of the unit.

Before connecting this unit to the mains supply, ensure the fuse fitted is the correct type and rating
is as indicated on the rear panel, adjacent to the fuse holder.

Safety Warning

This unit is fitted with a standard fused IEC mains inlet: For safety reasons the earth lead should
never be disconnected.

To prevent shock or fire hazard, do not expose the unit to rain or moisture. To avoid electrical shock
do not remove covers. Refer servicing to qualified personnel only.

Attention!

Cables:

This product should only be used with high quality, screened twisted pair audio cables, terminated
with metal bodied 3-pin XLR connectors. Any other cable type or configuration for the audio
signals may result in degraded performance due to electromagnetic interference.

Electric Fields:

Should this product be used in an electromagnetic field that is amplitude modulated by an audio
frequency signal (20Hz to 20kHz), the signal to noise ratio may be degraded. Degradation of up to
60dB at a frequency corresponding to the modulation signal may be experienced under extreme
conditions (3V/m, 90% modulation).

1

After You Have Unpacked The Unit

Save all the packing materials - they will prove valuable should it become necessary to transport or
ship this product.

Please inspect this unit carefully for any signs of damage incurred during transportation. It has
undergone stringent quality control inspection and tests prior to packing and left the factory in
perfect condition.

If, however, the unit shows any signs of damage, notify the transportation company without delay.
Only you, the consignee, may institute a claim against the carrier for damage during transportation.

If necessary, contact your supplier or as a last resort, your Klark Teknik importing agent, who will
fully co-operate under such circumstances.

Side Up

This

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2

Introduction

The DN9848 is a highly configurable, digital electronic crossover/loudspeaker management system
comprising of four balanced analogue input channels and eight balanced analogue output channels.The
user may choose from the following preset routing configurations:

Each output channel may be sourced from the following input channel options :

None
A
B
C
D
A+B (channels summed at -3dB with balance control)
C+D (channels summed at -3dB with balance control))
A+B+C+D (channels summed at -6dB)

Though the DN9848 utilises a fully digital processor, it maintains the operational paradigm, as well as
the sonic integrity, of a high quality analogue unit. In addition to guaranteeing absolutely precise filter
operation, the use of digital technology provides unrivaled flexibility of routing, the ability to program
delays into both the input and output channels, extensive equalisation on both the input and output
channels, and of course programmability. Each input channel provides eight separately configurable,
fully parametric equalisation stages that may be usedfor room equalisation, upto 1000ms of delay, gain
control and compression. Full metering with clip indication is available for all input and output
channels.

Each output channel provides configurable high and low-pass filters for setting the crossover
characteristics as well as six further stages of fully parametric equalisation that may be used to
compensate for system or enclosure characteristics. Further delay of up to 300ms is available on each
output, mainly used for system time alignment, in addition to gain control, muting and limiting. Dual
all-pass phase correction sections are also included, the first of which can be any of the filter or
parametric EQ stages and can be adjustable in 5 degree steps.

The crossover filter types available are:

12dB/octave peaking (high-pass filter only)
24dB/octave peaking (high-pass filter only)
Butterworth (6, 12, 18, 24, 36 and 48dB/octave)
Linkwitz-Riley (12 and 24dB/octave)
Bessel (12, 18, 24, 36 and 48dB/octave)

All aspects of the unit may be programmed from the front panel via a RS-232 port or via remote control
using the standard comms port and RS-485 . Parameters may be directly edited via rotary controls and
switches on the front panel with all values being displayed on a 2-line, 24 character backlight LCD
display.

The operating system is held in flash ROM, enabling updates to be installed directly from a computer
and various levels of safety lockout. This lockout ability may be used for installations or hire
applications where unauthorised user intervention could place the connected loudspeaker systems at
risk. Upto 24 character passwords can be used rather than PIN numbers due to the large display.

3

Six user memories, 32 System memories and 99 Factory Presets are available. The System memories
are used to store complete setups for custom loudspeaker configurations while the User memories are
provided to allow a small number of patches to be stored or recalled while the main System memories
are locked to prevent alteration.

A working memory area is used to store the patch currently being used or edited - no changes made to
the working memory will be made permanent until the patch is stored.

The Factory presets will include crossover setups for commonly used EV and third-party loudspeaker
systems as itemised in the specifications section of this manual. A blank patch is also provided for
overwriting existing user patches where required. All the memory areas are monitored by an error
checking system. If an error is diagnosed, the DN9848 will attempt to correct the error and also display
a warning message to alert the user.

As supplied, the user patches are set to unity gain with all processing switched out and no routing.

4

Installation

The DN9848 is housed in a standard, 1U, 19" rack case. Allow adequate ventilation and avoid mounting
the unit directly above power amplifiers or other devices that radiate significant amounts of heat. Where
necessary, use fan cooled racks.

This device must be grounded and must use an approved mains fuse. The switch mode power supply
automatically adjusts itself to 50/60Hz mains supplies in the 100 to 240V (+/- 10%)AC range.

The inputs and outputs are electronically balanced on conventionally wired XLRs (pin 1 screen, pin 2
hot and pin 3 return) with a nominal operating level of +4dBu. For unbalanced use (input or output), pin
3 of the XLR may be grounded by linking it to the screen.

If ground loop problems are encountered, the user must not disconnect the mains earth but instead,
disconnect the signal screen at one end of the connecting cables. This can only be done when the unit is
being used within a balanced system.

5

Rear Panel Connections

Both the input and output channels are accessed via electronically balanced XLR

IN A

PUSH

connectors wired pin 1 ground, pin 2 hot, pin 3 cold. These may be used unbalanced
where necessary by connecting the ground and cold pins together, though balanced
operation is recommended.

IN B

PUSH

IN C

PUSH

IN D

IN D

PUSH

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

Two further XLR connectors (in/out comms) carry the RS-485 interface and are
connected in parallel to facilitate the linking of multiple units. This interface facilitates
remote control and monitoring.

OUTPUT 5

OUTPUT 6

OUTPUT 7

OUTPUT 8

IN

PUSH

COMMS

OUT

REPLACER SEULMENT PAR UN FUSIBLE DE MEME TYPE.

TO REDUCE RISK OF FIRE, REPLACE WITH SAME TYPE OF FUSE.

SUPPLY

VOLTAGE

AC~50-60Hz 60VA

CAUTION:

FUSE: 5x20mm

T0.5L250V

100-240V

Mains is fed to the unit via a standard IEC type connector.

S
U

C

6

User Interface

The user interface has been designed to be clear and straightforward with the main
functions divided into five menus covering the input channels, output channels, patch
loading, patch saving and system setup. Each menu is stepped through linearly with
three rotary controllers being used to edit the displayed parameters directly. For the
purposes of identification, these will be referred to (left to right) as X, Y and Z. A green
LED ring is associated with each of these encoders to indicate that the control is
currently active as some menu pagesdo not requireall three controls.The signal routing
is handled within the output channel menus where combinations of the four input
channels may be selected as the signal source.

Input channel menus are selected by pressing the corresponding channel Select buttons
while Output channel menus are selected bypressing the correspondingchannel's menu
access button, each of which is fitted with an integral amber status LED.

7

Controls

THE INPUT CHANNELS
Each input channel comprises an input gain stage followed by an eight-band,fully parametric equaliser,
a full-band compressor and a delay. The input metering monitors the output from each processing stage
to avoid the possibility of inadvertent clipping within the processing chain.

Input block diagram:

Input

Input
Gain

PEQ 1

PEQ 6 PEQ 7 PEQ 8

PEQ 2 PEQ 3 PEQ 4

Compression

PEQ 5

Delay

Clip

Input

Metering

Output

Input

Metering

Feed

INPUT MENU BUTTONS
Each of the four input channels (A - D) may be accessed and edited independently via channel select
buttons A, B, C and D. These correspond directly to rear panel inputsA, B, C and D and each button has
an integral amber LED to indicate which channel is currently being accessed. Depressing any of these
buttons will provide direct access to the first page of the edit menu. Subsequent presses will step
through the five available edit pages after which the display will return to Page 1 and the sequence will
start again. The number of accessible pages is subject to the Lock status of the unit. If the System
Protection password has been set, the compressor pages will be inaccessible until the unit is unlocked.

Pressing the HOME (SETUP) button at any time during editing will return the user to the main menu
HOME page.

Pressing STORE or RECALL will also cause the operating system to leave the current menu and
initiate either the Store or Recall sequence as selected.

Pressing any Input channel select button when an output menu is currently active will quit the current
menu and go to the first menu page of the input channel selected. Similarly, pressing any Output
channel select button when an input menu is currently active will quit the current menu and go to the
first menu page of the output channel selected.

Pressing an Output channel select button when a different output channel menu is currently active will
change the display to the same page of the newly selected output channel. Pressing an Input channel
select button when a different input channel menu iscurrently active will changethe display tothe same
page of the newly selected input channel.

8

INPUT BARGRAPH METERS
The input 9-segment bargraph meters can display either level or compressor gain reduction. When the
input signal is below the compressor threshold, the meters display the difference between the current
signal level and the compressor threshold so as to show the available headroom before compression.
When the signal exceeds the compressor threshold, the meters read downward from the 0 dB LED to
show the amount of gain reduction taking place. The top red clip LED will always warn of clipping,
regardless of the compressor status.

ROTARYENCODERS
The three rotary controls X, Y and Z associated with the displayare continuous encodersand are usedto
edit parameter values shown in the display window. These controls are used for all front panel
parameter editing where each control corresponds to an on-screen parameter. A green LED indicator
ring is associated with each of the three controls to indicate when they are active. If there is no parameter
associated with any one of the encoders in the currently accessed screen, the LED ring will not
illuminate.

RECALL
Initiates the recall of a User, System of Factory setup patch.

SAVE
Initiates the save sequence for storing User or System setup patches.

9

THE OUTPUT CHANNELS

Input block diagram:

Inputs

Routing

PEQ 2 PEQ 3

Delay

Phase

x2

PEQ 4

Low

Pass

PEQ 5

High
Pass

PEQ 6/

HEQ

PEQ 1/

Gain/
Invert

LEQ

Clip

Limiter

Output

Metering

Mute

Output

Output

Metering

Feed

The output channels are slightly more complex than the input channels insomuch as they are
responsible for the signal routing as well as for further signal processing. At the input of each Output
channel is a routing block capable of connecting that output to any of the available combinations of the
four Input channels. This provides the user with the flexibility required to construct any crossover type
up to 8-way. This is followed by a Delay, two independent phase correction stages, the crossover low
and high-pass filters, six further stages of fully parametric equalisation and a limiter. All key stages are
monitored by the output meters and each channel can be muted by pressing the output level control pot.

OUTPUT LEVEL CONTROLS
Each of the eight output channels is fitted with a level control potentiometer that also incorporates a
push switch. Pressing the potentiometer knob mutes the channel and causes the red status LED ring
around the control to light.

MENU SELECTION KEYS
Each of the eight outputs is fitted with a momentary action output channel selection button. These have
integral amber status LEDs that light when the channel is selected.

OUTPUT BARGRAPH METERS
Each of the eight outputs has an 11-segment bargraph display that shows the true output signal level at
all times. The redsegment at the top of the meter illuminates when the clip threshold has been reached.

HOME (SETUP) KEY
The function of this key depends on the context in which it is used. One of its main functions is to exit
the current operation and return to the first page of the menu structure. Pressing and holding this key for
more than one second calls up the Setup menu.

PC PORTS
An 8-pin mini-DIN connector is provided on the front panel for connection to the RS-232 serial port of a
PC or other remote control device conforming to the RS-232 protocol. A standard XLR is provided on
the rear panel for connection to RS-485 for remote control.

POWER
The power switch activates the unit and the Klark Teknik logo on the front panel will illuminate. The
circuitry is designed so that no audio transients or thumps are generated when powering up or down. It
is also possible to program a 'ramp up time' for the audio output.

10

Main Menu Structure

Main menu structure diagram:

HOME

(SETUP)

HOME

(SETUP)

HOME

(SETUP)

HOME

(SETUP)

STORE

HOME

(SETUP)

HOME

(SETUP)

RECALL

STORE

RECALL

HOME

(SETUP)

Access to parameters is via an intuitive, hierarchical menu

system where the X, Y and Z screen data entry controllers

are used to access on-screen parameters directly.

When nothing is selected, the top level of the menu is

displayed where the currently loaded patch name will be

shown. From this point, it is possible to go directly to the

Memory Recall, Memory Store, Setup Menu, Input Menu or

Output Menu via the RECALL, STORE, HOME (SETUP)

buttons or by pressing any one of the four Input Channel

select button. The Output channel menus are called up by

pressing the associated Output channel select button.

11

Save/load Routine

RECALLING PATCHES
Pressing RECALL initiates the Recall sequence allowing thescreen data entrycontrollers X, Y and Z to
be used to select the memory bank (Preset, System and User). A message instructs that the Recall
sequence can be aborted by pressing the HOME (SETUP) key, whereupon the display returns to the
HOME page. Note that patch Recall will not be possible if this operation is locked out - see Security
section.

Pressing RECALL a second time loads the currentlyselected patch intothe workingmemory unless the
patch selected is identical to the one already loaded. In this case the system is intelligent enough to
know that it doesn't need to load the patch. The three screen data entry controllers access the three
memory types: User, System and Preset. The recall sequence may be aborted at any time prior to
pressing RECALL a second time by pressing the HOME (SETUP) button.

SAVING PATCHES
Pressing STORE initiates the Store sequence and displays a message asking the user to select the
desired User or System memory bank. As with Recall, the sequence can be aborted at any time prior to
saving by pressing the HOME (SETUP) button, whereupon the display returns to the HOME page.

The X screen data controller may be used to step through the System and User memories unless the
System memories are locked, in which case these will not be accessible. If empty memory banks are
available, the first available one will be shown by default. Once all patches are full, the system will
automatically go to the last patch recalled, though the user may step through to any other location.

Pressing STORE a second time calls up a dialogue box requesting the user to enter a name for the stored
patch.

X: Cursor left or right.
Y: Scrollcharacters.
Z: Not used.

By default, the name initially displayed will be that of the working memory, ie. the currently selected
patch.

Once the name has been entered, pressing STORE for a third time will save the patch to memory and
return the user to the HOME page.

Diagram showing the save and load menu screens:

12

System Setup Menu

The System Setup menu of the DN9848 enables global parameters: LCD contrast, RS-485 channel,
System and Panel Lockout status, the delay time units, power-on options on and the working memory
name. Note that if an RS-485 channel (other than Off) is selected, the front panel controls (other than the
HOME (SETUP) button)will not function.

If HOME (SETUP) is pressed and held down for at least one second while the first page of a menu is
being displayed, the system enters the context-sensitive Setup menu. The HOME (SETUP) button is
then used to step through the setup pages. When all the pages have been accessed, the next press of the
HOME (SETUP) button will return the user to the HOME page.

Pressing any other button while in Setup mode will exit the Setup menu and take the user to the HOME
page.

LCD Contrast
The display contrast is variable in 11 steps numbered 0 to 10 in so as to accommodate off-axis viewing
angles. The defaultsetting is 5.

X: Display contrast.
Y: Notused.
Z: Not used.

RS-485
RS-485 can operate on any one of 256 possible channels at a fixed data rate of 38.4kHz (38400 baud).
The default condition is for the RS-485 channel to be set to off.

X: RS-485 channel.
Y: Notused.
Z: Not used.

13

Diagram Showing system setup menu screen:

SETUP

SETUP

SETUP

SETUP

SETUP

RS-485

Channel

Set

SETUP

Front

Panel

Locked

SETUP

SETUP

SETUP

SETUP

14

SECURITY
A number of lockout modes have been included to prevent tampering with the unit in situations where
unauthorised or unqualified personnel may have physical access.

FRONT PANELLOCKOUT
This facility enables the user to set a password of up to 24 characters in order to disable the front panel
controls. There are three possible lockout options: Unlock, Lock with full recall and Full Lock. When
Front Panel Lock is enabled, the Setup menu options will be confined to the RS-485 Communications
and front Panel Lockout pages only. All lock functions are retained after power down. To unlock the
unit, the correct password must be entered. Press HOME (SETUP) to access the password page.

SYSTEM PROTECT ENABLE/DISABLE
With a component so central to a sound system as a crossover unit, it is possible that certain parameter
changes could result in loudspeaker damage, so a system is in place to make these parameters
inaccessible to unauthorized users. As with the panel lock modes, this function is password protected.
The password setup procedure is exactly the same as for the panel lock mode.

When the System Lock is on, the user will be denied access to the input channel compressors and all
output menu functions. It isalso not possible to loadfactory or systempatches whilethe System Lockis
on, though User memories may still be accessed, as may the Password page, input gain, EQ and delay
parameters.

As supplied, the password field is blank and the unit is unlocked.

To set password:

X: Character position.
Y: Selectcharacter.
Z: Toggles Lock modeon or off.

To unlock the unit, the correct password must be entered via the HOME (SETUP) page.

To enter a password:

X: Set character position.
Y: Selectcharacter.
Z: Toggles the Lockmode on or off.

15

Block diagram showing security menus:

SETUP

SETUP

SETUP

SETUP

SETUP

SETUP

RS-485

Channel

Set

16

RS-485 LOCAL OVERRIDE
In normal use, the RS-485 channel number is set to Off in the Setup menu. If a channel number is
selected, the HOME (SETUP) key will still function but all other front panel controls (other than LCD
contrast) will be inoperative (regardless of the Panel Lockout status) as the unit now expects to receive
commands via the RS-485 interface. Pressing the HOME (SETUP) key when in this mode will take the
user directly to the RS-485 Communications page, where changing the Channel number back to Off
will restore normal front panel operation and return the user to the HOME page when the HOME
(SETUP) is pressed again.

NAME WORKING MENU
This function allows the user to rename the currently recalled patch (the contents of the working
memory) without having to go through the Store sequence. Note that factory preset patches cannot be
renamed.

X: Character position.
Y: Selectscharacter.
Z: Not used.

DELAY UNITS/TEMPERATURE
This section allows the user to choose the delay units to read in time or distance based on the speed of
sound. In distance mode, the nominal ambient temperature may be entered to correct the input channel
delay time. The available units are: milliseconds, microseconds, imperial (feet and inches) and metric
(metres and millimetres). Note that although the unit has the ability to monitor its own internal
temperature, this will be higher than the nominal venue air temperature, so should not be used for delay
time calculations. The temperature may be entered in the range 0 to 40 degrees C in 1 degree
increments. Note that the temperature parameter is only relevant when the delay is set in units of
distance, not as time.

X: Set delay units.
Y: Entertemperature.
Z: Not used.

POWER ON OPTIONS
The user can opt whether or not the unit should display an animated screen on startup (Logo On/Off). If
selected, the screen will be displayeduntil the audiooutputs are attheir full operatinglevels. In addition
to the power on/off muting, the user may set a ramp time to fade up the crossover output levels
gradually, the maximum ramp time being 30 seconds. The default settings are with the Start-Up screen
off and theramp time set to 5 seconds.

X: Selects Start-Up screen onor off.
Y: Outputlevel ramp time.
Z: Not used.

17

Input Menu Structure

Each of the Input channels comprises a gaincontrol, eight fully parametric EQstages, a compressor and
a delay line, monitored by a dual function bargraph meter that shows both signal headroom and
compressor gain reduction.

Input channel
menu block:

INPUT

INPUT

INPUT

INPUT

INPUT

INPUT

INPUT

INPUT

INPUT

18

INPUT

INPUT

INPUT

INPUT

System
Protect

Password

Pin Set

INPUT GAIN/DELAY

Note that the delay units are selected in the Setup menu.

Input Delay/Gain Page
X: Not used
Y: InputDelay
Z: Input Gain.

PARAMETRIC EQUALISER
Each of the eight stages is identical, each being accessed via a separate menu page.

Input PEQ Pages 1 - 8
X: Frequency.
Y: Bandwidth
Z:Amount of cut or boost.

COMPRESSOR
This is a straightforward, variable ratio, compressor with selectable hard or soft knee characteristics
and a bypass function. There are two menu pages for parameter adjustment.

Input Compressor Page 1:
X: Threshold
Y: Ratio
Z: Insert On/Off

Input Compressor Page 2:
X:Attack
Y: Release
Z: Knee

19

The Output Menu Structure

Each of the eight output channels provides configurable high and low-pass filters for setting the
crossover characteristics as well as six further stages of fully parametric equalisation that may be used
to compensate for system or enclosure characteristics. Delay of up to 300ms is available in addition to
gain control, muting and limiting. Dual all-pass phase correction with channel invert. A number of
preset input-to-output routing options are available.

The edit menu for any output channel may be accessed by pressing in the corresponding output menu
select button. Only one channel may be active for editing at any time, and after pushing the switch, the
Output menu will be accessed unless it has been password protected.

The menu is always first accessed at its top page where subsequent pushes on the select button will
cause the menu to step through the available pages. When all the pages have been presented, the next
push will return the user to the top of the menu. Pressing the HOME (SETUP), STORE or RECALL
keys will cause the display to jump to the HOME page. Pressing the select button for a different output
channel will show the same menu page for the newly selected channel.

Output channel
menu block:

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

20

OUTPUT

OUTPUT

ROUTING/OUTPUT DELAY
Each outputs can select one of the following sources as its input:

Delay Units: Time or a choice of imperial or metric distance as selected in the Setup menu. The choice
of delay units applies to both the input and output channels.

Routing/Output Delay Page
X: Routing option.
Y: Delay.
Z: Balance.

OUTPUT PHASE CORRECTIONFILTER.

Provides first order correction of phase with phase angle referenced to one of the filters in the output.

X: Phase angle - 0° to 180° in 5° steps. 0° is off..
Y: Angle Reference - one of LPF, HPF, LEQ/PEQ1, PEQ2,3,4,5, HEQ/PEQ6.
Z: Invert.

OUTPUT ALL-PASS FILTER
Provides first and second order correction of phase.
X: Frequency.
Y: Q- only active for second order filter.
Z: .

Enable- one of OFF, 1 or 2

st n d

The frequency control sets the point at which 90° (first order) or 180° (second order) of phase shift is
achieved. Q gives control over the slope of thephase transition for a second order filter.

In all cases the phase changes from 180° / 360° at low frequency to 0° at high frequency.

OUTPUT LOW-PASS FILTER
Low-Pass Filter Page
X: Frequency.
Y: Filtertype.
Z: Filter slope.

OUTPUT HIGH-PASSFILTER
High-Pass Filter Page
X: Frequency.
Y: Filtertype.
Z: Filter slope/Peaking filter gain.

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OUTPUT PARAMETRIC/LOWSHELF FILTER
The upper and lower bands of the six-band output parametric equaliser may be switched between
bandpass and shelving operation. In other respects, the six bands are identical in range and control
functions.

BAND 1
Output PEQ/LEQ Page
X: Frequency.
Y: Bandwidth/Rolloff slope.
Z: Level.

BANDS 2 - 5
Parametric bands 2 - 5 are identical but without the shelving filter option.

Output PEQ 2 - 5 Page
X: Frequency.
Y: Bandwidth.
Z: Level.

BAND 6
Output PEQ/HEQ Page
X: Frequency.
Y: Bandwidth/Rolloff slope.
Z: Level.

OUTPUT LIMITER
The output limiter is a peak reading design, the main function of which is toprotect equipment being fed
from the DN9848 from being driven into clipping. In order to accomplish this, the limiter acts very
quickly and employs an intelligent auto system that adjusts the 'look ahead' time according to the
release time setting. The look ahead time varies between 10 and 24 samples so that transients can be
anticipated, but no setup on behalf of the user is required. The limiter threshold is variable so as to
accommodate the level requirements of virtually all professional equipment. Limiter action is
monitored by the second from top red section on each of the output channel meters. The top section
registers any clips that may occur.

Limiter Page
X: Threshold.
Y: Release.
Z: Knee.

OUTPUT MUTE
Each of the eight outputs is equipped with a noise-free mute switch built into the OUTPUT level
controls. This switch is electronically latching and shows a red status LED ring when the channel is
muted. If one of the controls is pressed and held for more than one second, all eight outputs are muted.

METERS
All eight outputs are monitored by independent 11-segment meters, the top section of which registers
clips occurring within the output channel EQ stages. The red 0dB segment below this registers limiter
action and is always referenced to the limiter threshold. The remaining green and yellow segments
indicate the output signal level from -40dB to -3dB. If the limiter threshold is exceeded, the meters flip
to reading gain reduction which is shown reading downwards from the 0dB segment.

If the limiter threshold is set to Off, the limit segment will illuminate at the same time as the Clip
segment.

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Test Mode

If the Setup key is held down while the unit is powered up, the DN9848 automatically enters its
diagnostic mode, displaying a Test menu. This is for use by service personnel only. If this mode is
entered inadvertently, power down the unit, then power up again normally.

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Operational Example

Quick Start

This section assumes that the DN9848 is not locked and that the user is familiar with the concepts of
crossovers, compressors, equalisers and limiters.

Each input channel includes eight parametric equalisation stages, up to 1000ms of delay, gain control
and compression. Full metering with clip indication is available for all input and output channels.

Each output channel provides configurable high and low-pass crossover filters in addition to six further
stages of fully parametric equalisation, adjustable delay of up to 300ms, gain control, muting and
limiting. Dual all-pass phase correction sections are also included, each of which is referenced to the
cut-off frequency ofthe low-pass filter and adjustable in 5 degree steps.

To access an Input Channel for editing, press one of the four input channel select buttons. This will
display the first page of the Input Channel menu. Further button presses will step through the menu
pages, eventually returning to the first page.

Changes to on-screen parameters are made via the X, Yand Z rotary controllers that relate directlyto the
parameters currently displayed on-screen. Each controller has an illuminated status indicator which
will remain unlit if there is no corresponding parameter (ie. if the current screen contains only one or
two adjustable parameters).

To Access an Output Channel, press one of the eight output channel select buttons. This will display the
first page of the Output Channel menu. Further control presses will step through the menu pages,
eventually returning to the first page. Note that the input-to-output routing options are selected within
the Output Channel menu.

The crossover filter types available are:

12dB/octave peaking (high-pass only)
24 dB/octave peaking (high-pass only)
Butterworth (6, 12, 18, 24, 36 and 48dB/octave)
Linkwitz-Riley (12 and 24dB/octave)
Bessel (12, 18, 24, 36 and 48dB/octave

Changes to on-screen parameters are made via the X, Yand Z rotary controllers that relate directlyto the
parameters currently displayed on-screen. Each controller has an illuminated status indicator which
will remain unlit if there is no corresponding parameter (ie. if the current screen contains only one or
two adjustable parameters).

To load a factory preset or user patch, press RECALL to display the Recall menu. Here it is possible to
select from System, User and Factory patches. Changes to on-screen parameters are made via the X, Y
and Z rotary controllers that relate directly to the parameters currently displayed on-screen.

To save a User or System Patch, press SAVE to display the save menu. Here patches may be saved into
either the System or User locations and named with up to 24 characters. Changes to on-screen
parameters are made via the X,Y and Z rotary controllers that relate directly to the parameters currently
displayed on-screen.

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The Security features are located in theSetup menu, accessedby pressing the HOME(SETUP) key and
holding it down for a minimum of 2 seconds. Even when the unit is locked, the menu pages relevant to
password entry will always be accessible. There are two types of lockout: Full Panel Lock and System
Lock. In System Lock mode, the User memories are still accessible.

Note that the input meters have a dual function: they display headroom until the compressor or limiter
thresholds are reached when they switch to displaying gain reduction, which reads from the top of the
meter downwards. The output meters display gain unless limiting occurs, in which case they show gain
reduction.

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Technical Specification

Audio Inputs Four

Type Electronically balanced (Pin 2 Hot)
Impedance

Common Mode Rejection >80 dB@1kHz
Maximum level + 21 dBu

Audio Outputs Eight

Type Electronically Balanced (Pin 2 Hot)
Minimum load impedance 56 /20nF
Source impedance 56
Maximum level + 21 dBu into > 2k

Performance

Frequency response +/- 0.3 dB with all filters and EQ flat
(20 Hz to 20 kHz)
Distortion @ +8 dBu <0.02%
(20 Hz to 20 kHz)
Dynamic range >113 dB
(20 Hz to 20 kHz unweighted)

W

Balanced 20k
Unbalanced 10k

W
W

W
W

W

Input Processing (per channel)

Input gain +12 dB to -40 dB in 0.1 dB steps plus Off

Parametric EQ 1-8 Frequency range: 20 Hz to 20 kHz

in 21 steps per octave
Boost/cut: +6/-18 dB in 0.1 dB steps
Bandwidth: 3.0 to 0.08

Compressor Threshold: +21 dBu to -10 dBu in 0.1 dB steps

Attack: 40 us to 100ms (20 s steps from 40 s to 1ms.

Insert: On/Off
Release: 10 ms to 2000ms in 10ms increments
Ratio: 1:1 to 5:1 in unit increments
Knee: Hard/Soft

Delay 0 to 1 second (342.25 m or 1122' 10" at 20C)

in 20.8 us steps

mm

Then 1ms from 1ms to 100ms)

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Output Processing (per channel)

Routing Route from inputs: A, B, C, D, A+B, C+D, A+B+C+D

None
A ChannelA
B Channel B
C Channel C
D Channel D
A+B (channels summed at -3dB with balance control))
C+D (channels summed at -3dB with balance control))
A+B+C+D (channels summed at -6dB)

Note that sources comprising summed channels will only be a
available if the input channel delays for the summed channels
are set to the same value.

Controller Z functions as a balance control when the source is
A+B or C+D. The balance is adjustable from 0 to 100% in 1%
increments.

Delay 0 to 300 ms (102.68 m or 333' 10" at 20°C)

in 5.02 us steps

Output phase correction filter Phase angle: - 0° to 180° in 5° steps. 0° is off

Angle Reference: - one of LPF, HPF, LEQ/PEQ1, PEQ2,3,4,5,

HEQ/PEQ6
Invert: Yes / No

Output all-pass filter Frequency: 20Hz - 20kHz in 21 steps per octave

Q- only active for second order filter: 0.4 to 6.0
Enable: one of OFF, 1 or 2

st n d

Low pass filter The following filter configurations are supported:-

i. Butterworth (6 dB/Oct, 12 dB/Oct, 18dB/Oct,

24 dB/Oct, 36 dB/Oct, 48 dB/Oct)
ii. Linkwitz-Riley (12 dB/Oct, 24 dB/Oct)
iii. Bessel (12 dB/Oct, 18 dB/Oct, 24 dB/Oct, 36

dB/Oct, 48 dB/Oct)
iv. Filter bypass

Frequency Range: 20 Hz to 15 kHz in 21 steps/octave

High pass filter The following filter configurations are supported:-

i. 12 dB/Oct Peaking
ii. 24 dB/Oct Peaking
iii. Butterworth (6 dB/Oct, 12 dB/Oct, 18 dB/Oct,

24 dB/Oct, 36 dB/Oct, 48 dB/Oct)
iv. Linkwitz-Riley (12 dB/Oct, 24 dB/Oct)
v. Bessel (12 dB/Oct, 18 dB/Oct,

24 dB/Oct, 36 dB/Oct, 48 dB/Oct)
vi. Filter bypass

Frequency Range: 20 Hz to 15 kHz in 21 steps/octave
Peaking Filter Boost: 0 dB to +6 dB in 0.1 dB steps.

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Parametric EQ 1/Low shelf filter Frequency range: 20 Hz to 20 kHz

in 21 steps per octave
Boost/cut: +12/-12 dB in 0.1 dB steps
Parametric EQ Bandwidth: 3.0 to 0.08
Shelf slope: 6 dB/Oct and 12 dB/Oct

Parametric EQ 2-5 Frequency range: 20 Hz to 20 kHz

in 21 steps per octave
Boost/cut: +12/-12 dB in 0.1 dB steps
Bandwidth: 3.0 to 0.08

Parametric EQ 6/High shelf filter Frequency range: 20 Hz to 20 kHz

in 21 steps per octave
Boost/cut: +12/-12 dB in 0.1 dB steps
Parametric EQ Bandwidth: 3.0 to 0.08
Shelf slope: 6 dB/Oct and 12 dB/Oct

Phase invert Normal/invert

Output gain +12 dB to -40 dB in 0.5 dB steps plus Off

Look-ahead limiter Threshold: +21 dBu to 10 dBu in 0.5 dB steps

Release: 10 ms to 1000 ms
Knee: Hard/Soft

Mute On/off

Power Requirements

Voltage 90 to 250 V a.c @ 50/60 Hz
Consumption < 75 VA
Fuse rating T0.5L 250V

Dimensions

Width 483 mm (19 inch)
Height 44 mm (1.75 inch)
Depth 287 mm (12 inch)

Weight

Nett 4kg
Shipping 6kg

Terminations

Audio inputs/outputs 3-pin XLR
RS-485 inputs/outputs 3-pin XLR
RS-232 8-pin Mini-DIN socket
Power 3-pin IEC

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