DYNACORD
USER MANUAL
DDL 204
18 Bit 2-in-4 Digital Delay Line
1. INTRODUCTION
First of all we should like to thank and congratulate you for choosing the Professional Signal Delay Line DDL 204
from DYNACORD.
The DDL 204 is a delay unit which can be configured as stereo unit with 2 x IN and 2+2 x OUT or as mono unit
with 1 x IN and 4 x OUT at will, enabling you an easy set-up of "distributed systems" of different loudspeaker
groups, distributed over the room. The different delay times of sound from the loudspeaker groups to the audience
can be compensated with the DDL 204, in order to avoid echo effects and increase speech intelligibility.
The 4 outputs of the DDL 204 allow different delays for 4 loudspeaker groups. The maximum delay time of more
than 2750 msec, allows a delay compensation of distances up to 950 m. Optionally the delay can be set as distance
im m, cm, inch, feet or as time in msec. According to requirements in the "normal" operating modes the phase can
be inverted for each output and additionally a High Shelving Filter can be used to reduce the trebles by 15 dB. The
various delays can either be edited relatively to one another or separately. 30 different configurations can be stored
in 30 user memory places.
All the DDL 204‘s inputs and outputs are electronically balanced XLR sockets. It is perfectly straightforward to
retrofit transformers as an optional feature.
In this Owner’s Manual you will find a lot more features of the DDL 204. Please read it through carefully and we
guarantee that your new Professional Signal Delay Line DDL 204 from DYNACORD will give you great pleasure.
r
IMPORTANT NOTES
ATTENTION: This unit must be protected from damp because of fire risk and the possibility
of electric shocks.
1. Make sure that nothing, especially no metal objects, are inserted into the device. This
could result in a severe electric shock or malfunction.
2. If the unit is subjected to extreme fluctuations of temperature, e.g. on being transported
from outside to a heated room, condensation can form. The unit should not be used until it
has reached room temperature.
3. If water or any other liquid is spilt on to the unit accidentally, the unit should be switched off
immediately and taken to a servicing facility to be checked.
4. Make sure that the unit is always well ventilated and never exposed to direct sunlight.
5. Do not use sprays to clean the unit as they have a detrimental effect on the unit and could
ignite suddenly.
6. Inside the unit there is a battery to supply the RAM when the unit is switched off. This will
ensure that your stored USER programs do not get lost. The service life of the battery is
approx. 5 years. If the voltage drops below a minimum value, the following display appears
after switching the unit on: "Service Required, Change Internal Battery". In this case contact
the DYNACORD service center for changing the battery.
ON NO ACCOUNT SHOULD THE USER ATTEMPT TO DO THIS HIMSELF!
V___ J
1-2
2. PANEL DESCRIPTION AND CONNECTIONS
4 6 8 7
2.1 FRONT PANEL
1, Controls INPUT 1 / INPUT 2
These adjust the input level of the DDL 204 to adapt the
unit to different sound source output voltages. The input
signal can be raised by 6 dB (control fully right) or
attenuated infinetely.
2, Level indicators INPUT 1 / INPUT 2
These are for modulation monitoring, as the peak value
of the input level is indicated. Another feature is the peak
hold function which facilitates easy level matching. Ad¬
just the input controls so, that the level indicators remain
at 0 dB. The CLIP LED’s should never light up, because
otherwise the unit is overdriven internally.
3, Multi-functional display
This is a LC display involving 2 lines with 16 characters
each. In PLAY mode the program number and delay
configurations for the outputs 1 - 4 are indicated. In EDIT
mode the parameter name and a graphic and numeric
parametervalue are indicated. Depending on the current
status OPTION menus, status messages, user guide
messages etc. appear.
4, Status/Mode LED’s
These LED's indicate the DDL 204‘s current status. If the
LED EDIT lights up, the EDIT mode is indicated. The
LOCK LED indicates, that the DDL 204 is in the write
protected mode and that no key inputs are possible. The
BYPASS LED indicates the BYPASS mode of the unit.
The LED's MONO 1-IN-4 or STERO 1-IN-2 light up
depending on the actual configuration (see chapter 6
"DELAY CONFIGURATIONS AND PARAMETERS").
5, EDIT Key
This key changes the operation to EDIT mode. After
pressing this key, the first parameter of the active pro¬
gram is shown. Further parameters are accessible via
the SELECT keys. The value of the parameter shown
can be changed via the rotary encoder.
For further information please see "EDITING”, chapter
5.2.
6, SELECT Key <
In play mode this key selects the previous memory place
(activation via ENTER). In edit mode it is used for se¬
lecting parameters (always the previous parameter).
7, SELECT Key >
In play mode this key selects the next memory place
(activation via ENTER). In edit mode it is used for se¬
lecting parameters (always the next parameter).
8, STORE Key
With this key the edited programs can be saved in any
memory place (No. 01 - 30). For further information
please see chapter 5.3 "SAVE AND COPY"
9, OPTION Key
This key allows access to the OPTION mode where
special settings for the unit can be made or checked. For
further information please see "OPTION-FUNCTIONS”,
chapter 7.
10, BYPASS Key
With this key the DDL 204 is switched to BYPASS mode,
i.e. The inputs are then passed through directly to the
appropriate outputs according to the current configurati¬
on.
See also chapter 5.4 "BYPASS OPERATION".
11, Rotary Encoder with ENTER key
In play mode a program is selected by turning the
encoder and activated by pressing the encoder REN¬
TER). In the Edit mode the parameter values are altered
with the encoder. The parameter alteration is faster if the
encoder is turned and pressed simultaneaously. Ge¬
nerally speaking the encoder serves for fast one-hand
operation of the DDL 204. For further information please
see "OPERATION" on page 5-1.
12, Rotary controls OUTPUT 1-4
With this controls the output levels of the channels 1 to
4 can be adjusted and the DDL 204 adapted in this way
to the operating levels of subsequent devices. The out¬
put signal can be raised by 6 dB (control fully right) or
attenuated infinetely.
13, POWER switch
This key is used to switch the DDL 204 on and off.
2-1
2.2 REAR PANEL
14, Mains socket
The DDL 204 is started up by connecting the enclosed
mains cable to the mains socket. The DDL 204 is de¬
signed for mains voltages of 90 V to 250 V AC, meaning
that fluctuations in mains voltage present no problem!
15, Groundlift switch
The groundlift switch serves to prevent hum loops. If the
DDL 102 is used together with other units in a 19" rack,
the switch should be put into position "GROUNDED". If
the DDL 204 is used together with units which have
different earthing potentials, the switch should be put into
position "UNGROUNDED".
16, Sockets OUTPUT 1 - 4
These are the 4 DDL 204’s balanced outputs. In confi¬
guration "MONO 1 -IN-4'' the delayed signal of INPUT 1
is applied to the outputs 1 to 4.
In configuration "STEREO 1-IN-2" the delayed signal of
INPUT 1 is fed to OUTPUT 1 and 2 and the delayed
signal of INPUT 2 is fed to OUTPUT 3 and 4.
If the unit is switched off INPUT 1 is switched directly to
OUTPUT 1 and 2 and INPUT 2 directly to OUTPUT 3
and 4. Both inputs should always be connected in order
to ensure that a signal appears at all 4 outputs in the
case of unit failure.
The wiring for the inputs and outputs is explained in
chapter 3.
17, Sockets INPUT 1 / INPUT 2
These are the DDL 204's two balanced inputs.
In configuration "MONO 1-IN-4" only the signal from
INPUT 1 is fed to the outputs.
In configuration "STEREO 1-IN-2" the signal from IN¬
PUT 1 is fed to OUTPUT 1 and 2 and INPUT 2 to
OUTPUT 3 and 4.
The wiring for the inputs and outputs is explained in
chapter 3.
2-2
3. SETTING UP THE DDL 204
To achieve the best results with the DDL 204, the unit
must be connected properly. To start the unit up, connect
the enclosed mains connection cable with the DDL 204's
mains socket and your mains outlet.
In order to avoid temperature problems the unit should
be ventilated sufficiently and not operated at ambient
temperatures above 40°C.
Before you switch on the DDL 204, all connections
should be made according to your required configuration
and wiring.
IMPORTANT:
• Always use well-screened audio cables.
• To avoid high frequency losses, the feeding lines,
especially to the inputs, should not exceed 10 m.
• Do not position the unit directly on or under a power
amplifier, TV monitor or the like, as the leakage field
of the transformers in such devices could induce
hum into the electronic circuits of the DDL 204.
3.1 Balanced input wiring
Connect the non-inverting (+) lead of the cable to pin 2
of the XLR connector and the inverting (-) lead to pin 3
of the XLR connector. The screen is connected to pin 1
(SHIELD) of the XLR connector.
BALANCED
LINE
LEVEL
SOURCE
CX
HI U)
r
L0 (-)
3.2 Unbalanced input wiring
Connect the "hot" lead of the cable to pin 2 of the XLR
connector and the screen to pin 1 (SHIELD) of the XLR
connector. In order to avoid a level loss of 6 dB, short
Pin 1 and 3 of the XLR connector. If any noise occurs as
result of this connection, disconnect it again.
UNBALANCED
LINE
LEVEL
SOURCE
HOT
3.3 Balanced output wiring
Connect the non-inverting (+) lead of the cable to pin 2
of the XLR connector and the inverting (-) lead to pin 3
of the XLR connector. The screen is connected to pin 1
(SHIELD) of the XLR connector.
^_HI <+>_^
LO (-)
'a
BALANCED
LINE
LEVEL
3.4 Unbalanced output wiring
Connect the “hot" lead of the cable to pin 2 of the XLR
connector and the screen to pin 1 (SHIELD) of the XLR
connector. In order to avoid a level loss of 6 dB, short
Pin 1 and 3 of the XLR connector. If any noise occurs as
a result of this connection, disconnect it again.
3.5 Position of the Groundlift switch
The groundlift switch serves to avoid hum loops. Depen¬
ding on the operating mode it should be switched to the
following positions:
HOT
UNGROUNDED: If you are using the DDL 204 together
with units which have different earthing potentials.
GROUNDED: If you are using the DDL 204 together with
other units in a 19” rack.
CIRCUIT 1 TO
CHASSIS SWITCH
GROUNDED
UNGROUNDED ►
3-1
4. START-UP
4.1 SWITCHING THE UNIT ON
1 The DDL 204 is switched ON via the POWER switch
(13).
POWER
2 The following appears on the display:
3 Subsequently the DDL 204 is ready for operation
and is in Play Mode. The following may appear on
the display:
The display means that you are in program 01. The
delay time for output 1 is adjusted to 200 msec., for
output 2 to 400 msec., for output 3 to 600 msec, and
for output 4 to 800 msec. The configuration can be
seen on the status LED's MONO 1 -IN-4 or STEREO
1 -IN-2.
DYNACORD DDL 204
SIGNAL DELAY
pD 200
J\ 400 [01
53 6oo
4J 800 ms
(
NOTE!
If the display on the right side appears after the unit has
been switched on, you should contact the service center
to change the internal battery.
In this case the battery voltage has dropped below a min.
value and there is no guarantee as to whether your
program data will be maintained in the memory after
switching off the unit.
V_ J
Service Required
Chng. Int. Battery
4.2 LEVEL SETTING
1 With the INPUT controls (1) you can adjust the DDL
204's input levels for the channels 1 and 2 to the
desired value.
2 While the level is being adjusted via the INPUT
controls (1), keep checking the maximum indication
on the level meters (2). The optimum value is 0 dB.
The CLIP LED’s indicate internal overdriving and
should on no account light up.
,-a -3
-6 -3
6
INPUT 2
CD CLP CD
CD • 3 CD
CD 0 CD
CD * 3 tZZ
CD - B CD
CD-12 CD
CD -« CD
CD-24 CD
Ml M2
4-1
5. OPERATION
The DDL 204 is operated by a rotary encoder with push
function (ENTER) and 6 function keys.
The DDL 204 contains 4 different modes which can be
selected by the corresponding mode key directly from
any state.
1. PLAY MODE
Mode after switching on
Program selection mode
2. EDIT MODE
Alteration of configurations and parameters
Indication via EDIT LED
Activation via EDIT key
Return to PLAY mode via EDIT key
3. STORE MODE:
Storing and copying programs
Activation via STORE key
Exit via STORE key
4. OPTION MODE:
Editing functions pertaining to equipment
Switching the edit protection on and off
Activation via OPTION key
Return to PLAY mode via OPTION key
5.1 PROGRAM SELECTION
Programs can only be called up when the DDL 204 is in
Play mode. This is the case after switching on, for
example.
The DDL 204 contains 30 program memory places. Each
program can be edited freely and can be saved to any
user memory place.
1 To call up a memory place you search for the pro¬
gram you want with the rotary encoder (11) or with
the two SELECT keys (6) and (7).
EOTT ■* SELECT »-
a
i
ST0FE
OPTION BYPASS
1 _i
nz
□
PUSH - ENTER
-« PARAMETER ►
2 The new delay setting appears on the display and
the program number on the right in the top line blinks.
The new delay configuration can be seen on the
status LED’s MONO 1-IN-4 or STEREO 1-IN-2.
nn 350 El 700 [11
Hi 350 0] 700 ms
3 Activate the program by pressing the rotary encoder
(11) (ENTER). The program number stops blinking.
5-1
5.2 EDITING
Delay configurations and parameters are altered in EDIT
mode. For a description of all parameters please turn to
chapter 6.
1 Press the EDIT key (5).
2 You are now in EDIT Mode. The EDIT LED lights up
and the name and the value of the first parameter in
the active program appear on the display. A graphic
indication of the parameter value gives constant
information as to one’s current position in the para¬
meter range.
3 The rotary encoder (11) can now be used to alter the
parameter value. If you keep pressed the rotary
encoder during rotating, the parameter alteration is
accelerated (larger step width).
4 The set value appears on the display and the change
is immediately audible. The EDIT LED then blinks to
show that the program has been changed. If you do
not wish to alter further parameters, proceed directly
to point 7.
EDIT - SB.ECT *> fVW - ENTER
DELAY 1
■U 800 ms
EDIT SELECT» " ENTER
DELAY 1
■■ 500 ms
5 The SELECT keys (6) and (7) take the user to the
next or previous parameter.
EDIT SELECT ► “ ENTER
6 The following may appear on the display:
Points 3 to 6 can be repeated as often as required.
7 By pressing the key EDIT (5) again you change back
to Play Mode.
CAUTION! Your program alterations have not yet been
stored and will be lost at the next program change!
DELAY 2
■ 200 ms
EDIT 4 SELECT ►
STORE OPTION BYPASS
PUSH - ENTER
< PARAMETER ►
8 The program number and the delay setting appear
on the display. The EDIT LED continues to blink.
There are several different possible ways of conti¬
nuing:
— if you should wish to store the edited program in
a memory, proceed to chapter 5.3.
— if you should wish to continue to alter parame¬
ters, go back to step 1.
— if you should require the original program again,
press the rotary encoder (11) (=ENTER). The al¬
terations of the parameter values are thus dele¬
ted. The EDIT LED goes off.
( Note: ^
JJ 200
3 350
2 } 700
4j 700
111
ms
You can change directly from the edit mode into the store
mode by pressing the key STORE (8)1
V___ J
5.3 SAVE AND COPY
No matter whether you are saving an edited program or
wish to copy a program from one memory place to
another, the procedure is the same in both cases.
The storing procedure is initiated and ended via the
STORE key (8). You can leave the STORE mode by
pressing STORE (8) once again.
1 Press the STORE key (8) to start the storage proce¬
dure.
The following may appear on the display:
2 Select the desired memory place via the rotary en¬
coder (11).
The following may appear on the display:
3 Press the rotary encoder (11) (=ENTER) to confirm
the selected program number. The display will show
then:
4 Final storage occurs by pressing the key STORE (8)
again.
CAUTION! The previous program on this memory
place will be deleted (overwritten)! Please make
sure that the destination program number corre¬
sponds with the number you require. The storage
procedure can be cancelled by pressing any other
key.
The following may appear on the display after saving:
5.4 BYPASS OPERATION
The DDL 204‘s outputs have built-in relays which con¬
nect automatically the input 1 with the outputs 1 and 2
and the input 2 with the outputs 3 and 4 in case of
troubles (power loss, circuit failure) (see also BLOCK
DIAGRAM, page 8-2).
The unit can however be switched manually to "Bypass"
whereby the selected configuration is maintained. The
input signals are passed through undelayed and without
any filtering to the appropriate outputs.
For switching the DDL 204 to bypass mode, push the
BYPASS key (1 n ). This bypasses signal processing in
the DDL 204 are then bypassed. This status is indicated
by the according LED.
If you push the key BYPASS (10) once more, you switch
back to the delay operation. The BYPASS LED goes out
and the input signals are fed delayed according to their
settings and configurations to the outputs.
STORE PROGR. 07
TO PROGR. 07
STORE PROGR. 07
TO PROGR. 16
CONFIRM = STORE
PGM 07 TO PGM 16
CD 200
[2 700
[16
(2 350
0 700
ms
EDIT * SELECT ►
mug
STORE OPTION BYPASS
RJSH - ENTER
« PARAMETER *■
6-3
6. DELAY CONFIGURATIONS AND
PARAMETERS
6.1 BASIC STRUCTURES
The DDL 204 has 2 different basic structures, indicated
at the unit by the according status LED's:
MONO 1-IN-4
STEREO 1-IN-2
MON01 -IN-4 is a delay line with one input and 4 outputs.
This configuration should be used for situations where
more than 2 delayed loudspeaker groups have to be fed.
If the sound reinforcement system is in stereo, two DDL
204 must be used.
A typical MONO 1-IN-4 set-up is shown in the fig. on the
right.
STEREO 1-IN-2 are two delay lines with one input and
two outputs each. This configuration is applicable for
situations where in stereo sound systems up to two
delayed loudspeaker groups have to be fed.
A typical STEREO 1 -IN-2 set-up is shown in the fig. on
the right.
STEREO 1-IN-2
I I
i r
1
D m
INI
cur i or 1 1
1 tur* mrw
6.2 CONFIGURATIONS OF THE DDL 204
Both basic structures are sub-divided into 2 so-called
configurations. For the "MONO 1 -IN-4 structure" the
configurations are named:
Normal Monolin4
Ganged Mono 1in4
For the "STEREO 1-IN-2 structure" the configurations
are named:
Normal Stereo 1in2
Ganged Stereo 1in2
Configuration is set in EDIT mode which is accessible by _
pressing the EDIT key (5) (see also chapter 5.2, "EDI- CONFIGURATION
TING".) Normal Mono 1in4
Subsequently the "< SELECT" key is pressed until the '---
configuration menu appears as illustrated. The user can
then select the desired configuration via the rotary enco¬
der.
6-1
6.2.1 NORMAL MONO 1-IN-4
This is a delay line with one input and 4 outputs. The
delay time or the signal path and both the phase and the
HF shelving can be adjusted and stored individually for
all 4 outputs.
6.2.2 GANGED MONO 1-IN-4
This is also a delay line with one input and 4 outputs. The
difference is, that the delay time or the signal source
distance is adjusted together for all 4 outputs. This
means that for output 1 a "basis delay" is set and the
outputs 2,3 and 4 are then automatically multiples (x2,
x3, x4) of this "basis delay".
In this configuration it is not possible to set the phase or
HF shelving.
This configuration simplifies the delay setting, if the
delayed loudspeaker groups are set-up in equal distan¬
ces among one another.
6.2.3 NORMAL STERE01 -IN-2
These are two delay lines with one input and 2 outputs
each. The delay time or the signal path and both the
phase and the HF shelving can be adjusted and stored
individually for all 4 outputs.
Normal Mono 1in4
DELAY 4 PHASE 4
Ganged Mono 1in4
Boric Oriay x 4
Norm Stereo 1in2
OUTPUT 1
ne
0B.AY LINE 1
_
►PITT 1
&
DELAY 1
) t HF-SFELVNG 1
PHASE 1
0
OUTPUT Z
DB_A UNE 2
DELAY 2
) # HF-3FELYNG 2
PHASE 2
□ELAY LtC 3
OUTPUT 3
fo
MVT 2
DELAY 3
) % ►P-sc.vwa 3
PHASE 3
DELAY LtC 4
Z
OUTPUT 4
TS
DELAY 4
) m HF-SFELVlNG 4
PHASE 4
6-2
6.2.4 GANGED STEREO 1-IN-2
These are also two delay lines with one input and 2
outputs each. The difference is, that the delay time orthe
signal source distance are adjusted together for all 4
outputs. This means that a "basis delay" is set which is
valid for the outputs 1 and 3. The delays for the outputs
2 and 4 are then automatically set to the double value.
In this configuration it is not possible to set the phase or
HF shelving.
This configuration facilitates thedelay setting for delayed
loudspeaker groups in stereo systems, set-up equi-di-
stant to one another and left and right.
Gang Stereo 1in2
Basic Delay x 2
Group 1 Group 2 Group 3
(undelayed) (145 ms delayed) (290 ms delayed)
CONFIGURATION: Gang Stereo 1in2
BASIC DELAY: 145 ms
6.3 PARAMETERS
The "NORMAL configurations" offer a total of 14 para¬
meters in the following order:
CONFIGURATION
DELAY 1
PHASE 1
HF-SHELVING 1
DELAY 2
PHASE 2
HF-SHELVING 2
DELAY 3
PHASE 3
HF-SHELVING 3
DELAY 4
PHASE 4
HF-SHELVING 4
DELAY UNIT
When entering the EDIT mode the parameter which was
edited last appears; if the program has not been edited
the first parameter to appear is "DELAY 1".
6-3
f
In the "GANGED configurations" the following 3 parame¬
ters are available:
CONFIGURATION
BASIC DELAY ,
DELAY UNIT *
If the program has not been edited the first parameter
to appear in this case is "BASIC DELAY".
All parameters with their valuation ranges are described
in the following page:
DELAY 1 (2, 3, 4)
This parameter is used to set the delay time or the signal
source distance for the outputs 1 - 4. The reading appe¬
ars in milliseconds, microsec, feet, inches, metres or
centimetres.
Valuation range: 2 ms
2798 ms.
2245 ps -
2798240 |4S
3 ft.
3153 ft.
30 in.
37835 in.
1 m
961 m
77 cm
96105 cm
DELAY 1
■ 230 ms
PHASE 1 (2, 3, 4)
This sets the phase relationship of the delayed signals
for the outputs 1 - 4.
Settings: normal
inverted
&
1 PHASE
normal
HF-SHELVING 1 (2, 3, 4)
This is a shelving filter which can be used to attenuate
the trebles for the outputs 1-4 individually by up to 15dB.
As higher frequencies are damped generally more it is
advisable to adjust the frequency response of the de¬
layed loudspeaker lines accordingly. This permits impro¬
ved localisation of the signal source in distributed
systems.
Value range: 15 kHz, OdB - -15dB
HF-SHELVING 1
■■■ -4dB
I
6-4
i wifi iuwi in i iviiwi nnv rnrinmi. « biitf
BASIC DELAY
This sets the "basic time" for the "ganged configurati¬
ons". The setting is generally valid for the output 1. The
other outputs are set automatically to a multiple of this
basic time, depending on the configuration:
Output 1 = BASIC DELAY
Output 2 = BASIC DELAY
Output 3 = BASIC DELAY
Output 4 = BASIC DELAY
Output 1 = BASIC DELAY
Output 2 = BASIC DELAY
Output 3 = BASIC DELAY
Output 4 r BASIC DELAY
X 1 V.
x 2 _
at Ganged
x3-^
x 4
Mono Hn-4
X 1 \
x 2 _
at Ganged
x 1
x 2 "
Stereo 1 -in-2
Valuation range: 2 ms
699 ms.
2245 ps -
699557 ps
3 ft.
788 ft.
30 in.
9458 in.
1 m
240 m
77 cm
24026 cm
BASIC
DELAY
■■
350 ms
DELAY UNIT
Here the unit for the delay line can be selected. The
distance data are automatically calculated into delay
times.
Settings: milli-sec.
psec.
feet
inch
meter
centimeter
DELAY UNIT
milli - sec.
CONFIGURATION
Here the delay configuration can be selected. The num¬
ber of parameters and names depend on the configura¬
tion in question.
Settings: Normal Mono 1 in4
Ganged Mono 1in4
Norm Stereo 1in2
Gang Stereo 1 in2
CONFIGURATION
Normal Mono 1 in4
6-5
7. OPTION FUNCTIONS
The Option programs comprise a number of important
additional functions and defaults, such as display of the
software version, the setting of the LCD contrast, how
the VU display should be set, etc.
1 Press the key OPTION (9) to activate the Option
programs.
EDIT < SELECT »
r~
“1
STORE OPTION BYPASS
EZ
Z3
R;SS - ENTER
« PARAMETER ►
2 The Option program used last appears on the dis¬
play, e.g.:
3 Find the Option required using the two SELECT keys
(6, 7).
4 The rotary encoder (11) is used to set the Option
values.
5 An Option program can be cancelled by pressing
another MODE key, (e.g. return to Play Mode by
pressing OPTION again).
LCD CONTRAST
*** +3 ***
EDIT ..SELECT*
STORE OPTION BYPASS
PUSH - ENTER
. PARAMETER ►
7.1 SETTING THE LCD CONTRAST
The LCD contrast or viewing angle can be adjusted
between -10 (view from below) and +10 (view from
above).
LCD CONTRAST
7.2 DISPLAY MODE OF THE LEVEL METERS
PEAK HOLD:
The Peak-Hold function is switched on. This will help the
user to set the level.
NO PEAK:
The Peak-Hold function is switched off. The level meters
work normally.
SLOW:
In this setting the level meters work with a long decay
time constant, i.e. the indication decay is slower when
the signql level decreases.
VU DISPLAY MODE
Peak hold
7-1
VI « IVIt
7.3 SWITCHING THE EDIT PROTECTION ON AND
OFF
The DDL 204 also has an additional edit protection
feature which can be switched on and off. This means
that all the settings cannot be altered without entering a
code number.
LOCK = ENTER
CODE NR: 000
Enter a code number with the rotary encoder (11) and
confirm by pushing the encoder (11) (=ENTER) and then
STORE (8). The following may appear on the display:
CONFIRM = STORE
CODE NR: 008
If you wish to alter any of the unit’s settings, the display
will show:
SYSTEM
IS LOCKED!
In order to switch off edit protection, press the OPTION
key once more and the display shows:
UNLOCK = ENTER
CODE NR: 000
Enter your Code number now and press ENTER.
The following appears briefly on the display:
SYSTEM
IS UNLOCKED!
Now you can alter your settings again.
r
Note:
"\
— If you have forgotten the Code No. you can
switch off edit protection again, if you push the
keys STORE (8) and OPTION (9) simultaneous¬
ly during switching on.
7.4 DISPLAY OF THE SOFTWARE VERSION
NUMBER
The display shows the software version of the DDL 204’s
host processor, e.g. version 1.0.
DYNACORD DDL 204
Software V1.0
7-2
8.1 SPECIFICATIONS
Mains voltage
90 - 250 VAC / 50 - 60 Hz (without switching)
Power consumption
21 W
Safety class
1
Inputs
2 x XLR, electronically balanced, transformer as option
Input voltage
1.55 V/+6 dBu
Max. input voltage
9 V /+21 dBu
Input impedance
20 kohm
CMRR
Insertion lass of
> 70 dB (1kHz)
input transformer
<1.5 dB
A/D converter
18 bit linear, sigma-delta, 64times oversampling, linear phase
Outputs
4 x XLR, electronically balanced, transformer as option
Output voltage
1.55 V/+6 dBu
Max. output voltage
3.1 V/+12 dBu
Output impedance
<100 ohm
Min. load impedance
600 ohm
D/A converter
18 bit linear, 8times oversampling, linear phase
Frequency response
20 Hz-20 kHz ±0.3dB
S/N ratio
> 100 dB
THD without transformer
< 0.01% (1 kHz)
THD with transformer
< 0.1% (1 kHz)
Max. Delay time
2798 msec
Delay increment
5 psec
HF-Shelving Filter
15 kHz, 0... -15 dB
Data format
18 bit linear, internally 24 bit
Sampling rate
46,875 kHz
Display
2 x 16 digit alpha-numerical LCD with LED back lit
Ground Lift
Disconnects ground from housing
Dimensions (W X H X D)
483 x 43.6 x 287 mm; 19" with 1 HU
Weight
4 kg/8.8 lbs
Bypass relays
Bypass at power loss Oder circuit failure
Lock function
Protection against wrong operation by locking out of operation
Retrifitting kits
NRS 90 185 (1 x input transformer)
NRS 90 186 (1 x output transformer)
The specifications for this product are subject to change without prior notice.
8-2
8-3
483
Measuring data DDL 204 - complete device
1
Test Conditions:
• All Level, Frequency Response and Distortion Measurements are performed with "AUDIO PRECI¬
SION SYSTEM ONE".
• Generator impedance 25 ohms, Analyzer impedance 100 kohms.
• Levels measured with f = 250 Hz.
• The noise levels measured at the outputs refer to the nominal output level of +12dBu.
• Tolerances of the level values: +/-1 dB.
• All Distortion measurements are performed with a measurement bandwidth of 10 Hz - 22 kHz, without
filter, measured is THD+Noise.
• All measurements with balanced loading of inputs and outputs (1 ground, 2 +, 3 -)
• Operating voltage and current are measured with "PHILIPS MULTIMETER PM 2517X".
• Power consumption is measured with "ZARES Wattmeter".
• 0 dBu = 775 mV rms
1. Operating voltage:
90 - 250 VAC
f = 50 - 60 Hz
2. Operating current:
at 110 VAC
270 mA
at 230 VAC
150 mA
3. Power consumption:
at 110 VAC
17 watts
at 230 VAC
21 watts
4. Inputs:
4.1. Input impedance
Zi
20 kohms
4.2. Input voltage:
Input control: 0
1.55 V = +6 dBu
Input control: 6
775 mV = 0 dBu
Elm ax
9 V - +21 dBu
4.3 Input symmetry:
CMRR (1 kHz)
> 70 dB
5. Outputs:
5.1. Output impedance
Zo
< 100 ohms
5.2. Min. load impedance:
Zl_min
600 ohms
5.3. Output voltage
Output control: 0
1.55 V= +6dBu
Output control: 6
3.1V =+12 dBu
Eomax
3 .1V =+12 dBu
24
6. Frequency responses:
6 .1. Frequency response complete unit:
* measured with service program "ORIGINAL THRU", Level = 0 dB
* Ini to Out 1 and 2, IN 2 to OUT 3 and 4
* Input level -12dBu
* All controls to 6 (fully right)
! DYNACORD DDL204
AMPL(dBu) vs FREQ(Hz)
mm
■mu
■■m
mmi
mu
■mu
■mu
■mu
■mu
■unn
■■min
■IHII
■mm
■mini
■mil
■mm
■mini
■■Ml
DYNACORD DDL204
AMPL(dBu) & AMPL(dBu)
FREQ(Hz)
100
6.3. Frequency response input stage and A/D converter:
* measured with external AES/EBU interface at connector P 150
* input level-10 dBu
* Input control to 6 (fully right)
10
100
Ik
10k 20k
6.4. Frequency response D/A converter and output stage:
* measured with external AES/EBU interface
at connector P 150
* input level 0 dBFS
* Output control to 6 (fully right)
27
7. Noise voltages
* measured with service program "ORIGINAL THRU", Level = 0 dB
* In 1 to Out 1 and 2, IN 2 to OUT 3 and 4
* All controls to 6 (fully right)
Eo(RMS)
22 |iV = -103 dB
EnOISE(RMS)
50 pV = -100 dB
EnoISE(Q-PEAK)
55 pV = -95 dB
EcCIR(Q-PEAK)
98 |i.V = -90 dB
8. Distortion (THD+N):
* measured with service program "ORIGINAL THRU", Level = 0 dB
* In 1 to Out 1 and 2, IN 2 to OUT 3 and 4
* Input level ref. to full modulation
* All controls to 6 (fully right)
THD+N < 0.02 %
THD+N (1 kHz) < 0.01 %
28
9. Retrofitting with transformers
Operation with NRS 90185 (input transformer) and NRS 90186 (output transformer) will alterate the
specifications as follows: .
* Level The insertion loss of the input transformers is approx. 1.5 dB, i.e. the input levels must
be raised by this amount.
If the outputs are loaded with 600 ohms, the output levels are reduced by max. 1.5 dB.
* Distortion
THD+N (20 - 500 Hz) < 0.5 %
THD+N (500 - 20 kHz) < 0.1 %
The alteration of the frequency response and the noise levels are not worth mentioning.
10. Specifications
Mains voltage
90 - 250 VAC / 50 - 60 Hz
Power consumption
Safety class
21 W
1
Inputs
2 x XLR, electronically balanced,
transformer retrofittable
Input voltage
1.55 V / +6 dBu
Max. input voltage
9 V / +21 dBu
Input impedance
20 kohms
CMRR
> 70 dB (1 kHz)
Insertion loss of the
input transformer
<1.5 dB
A/D converter
18 bit linear, sigma delta, 64times oversampling, linear phase
Outputs
4 x XLR, electronically balanced, transformer retrofittable
Output voltage
1.55 V/+6 dBu
Max. output voltage
3.1 V /+12 dBu
Output impedance
<100 ohms
Min. load impeadnce
600 ohms
D/A converter
18 bit linear, 8times oversampling, linear phase
Frequency response
20 Hz - 20 kHz (+/-0.5 dB)
S/N ratio
>100 dB
Distortion (THD)
(without transformer)
< 0.01 % (1 kHz)
< 0.02 % (20 Hz - 20 kHz)
(with transformer)
< 0.1 % (500 Hz - 20 kHz)
< 0.5 % (20 Hz - 500 Hz)
Max. delay time
2798 ms
Min. resolution
5s
HF shelving filter
15 kHz, 0 ... -15 dB
Data format
18 bit linear, internally 24 bit
Sampling rate
46.875 kHz
Display
2x16 digit alphanumerical LCD with LED back lit
Ground lift
separates circuit ground from chassis
Dimensions (WxHxD)
483 x 43.6 x 287 mm, 19", 1HU
Weight
4 kg
Bypass relay
Bypass if unit is switched-off
Lock function
Protects against maloperation
Retrofitting kits
NRS 90185 -1 x input transformer
NRS 90186 -1 x output transformer
30
DDL 204 - Test Programs
The DDL 204 integrates various test programs to check internal function blocks.
Pressing the keys "EDIT and "OPTION” simultaneously gives access to the test mode. The following
message appears briefly in the display:
TEST MODE
FOR SERVICE ONLY
The test programs can be selected by means of the "SELECT keys or rotary encoder and called up by
"ENTER".
The "ENTER” key also serves to abort a test.
The test mode is exited by the program call.
QUIT
START=ENTER
Available test programs:
• pP-ROM TEST
• pP-RAM TEST
• pP-DSP COM TEST
• DSP RAM TEST
• BATTERY TEST
• LED TEST
• DISPLAY TEST
• KEY TEST
• ENCODER TEST
• A/D ADJUST
• ORIGINAL THRU
• SINE WAVE OUT
• QUIT
pP-ROM TEST
START = ENTER
When "ENTER" is pressed the display changes to:
Testing pP-ROM
and the EPROMs of the host processor are checked. A check sum is calculated from the entire content
of the EPROM. The test cannot be interrupted! If no error is found, the following appears in the display:
pP-ROM TEST OK!
« »
If an error is detected the following appears:
pP-ROM TEST FAIL
«Checks: XXh »
pP-RAM TEST
START = ENTER
This program serves to check the static RAMs in the DDL 204’s processor system. To do so, various bit
patterns are written to all RAM addresses and re-read.
NOTE! All data in the RAM will be lost during this test!
When "ENTER" is pressed the following message appears in the display:
Warning: Data in
RAM will be lost
By pressing "ENTER" again the test program is started and the following message appears in the display:
Testing pP-RAM
The test cannot be interrupted! If no error is found, the following message appears in the display:
32
pP-RAM TEST OK!
« »
If an error is detected in the data bus, the faulty line is displayed:
pP-RAM TEST FAIL
« at D XX »
If an address error occurs, the display shows the first RAM address where a write/read error occurred:
pP-RAM TEST FAIL
« atXXXh »
pP-DSP COM TEST
START = ENTER
After pressing the "ENTER" key the communication between host processor and DSP is tested.
Testing P-DSP
If no error is found, the test is finished with the message:
m P-DSP TEST OK
« »
If an error is detected the following appears:
The test is finished with the message:
Error: —
DSP comnO
pP-DSP TEST FAIL
« »
33
DSP-RAM TEST
START = ENTER
This program serves to check the delay memory in the DDL 204. After pressing the “ENTER" key the
data and address busses from DSP to RAM are checked. The display shoes shortly:
Testing DSP-RAM
If no error is found, the test is finished with the message:
DSP-RAMTEST OK!
« »
If an error is detected in the data bus, the faulty data or address line is displayed:
DSP-RAMTEST FAIL
at D XX
Now the test can be continued by pressing any key except “SELECT’ and "ENTER”. The test is aborted
by pressing the keys "SELECT or "ENTER".
BATTERY TEST
START=ENTER
The DDL 204 incorporates a lithium battery to supply the static RAM with the necessary power when the
unit is switched off. The battery voltage is constantly monitored by the unit and can be indicated on the
display in this test. After the program has been called up via "ENTER", the following message appears
in the display:
Testing BATTERY
U: 3.0V
The test can also be aborted via "ENTER" and then the following appears on the display:
BATT.TEST OK
« »
If the battery voltage drops to below 2.5 volts the following error message is displayed:
BATT.TEST FAILED
« »
The battery should then be changed as soon as possible.
34
LED TEST
STARTsENTER
This program serves to check all LEDs on the front panel. After pressing "ENTER" the following appears
in the display:
Testing LEDs
The test starts with individual triggerung of the status LEDs. Then all LED segments are switched off.
The program ends automatically and the display shows:
LED TEST done
« »
DISPLAY TEST
START=ENTER
This program serves to check the LC display and the contrast setting. After the program has started, the
LCD shows a graphic pattern. This is so the user can check whether all the pixels are being activated
and are working properly. The following appears in the display:
LCD CONTRAST:
• •• • A ••••
999 9 V 9999
With the rotary encoder the display contrast can be adjusted in a range between -10 to +10. The test is
exited via "ENTER" and the following appears in the display:
DISP.TEST done
« »
The contrast value set is maintained even the unit is switched off.
KEY TEST
START=ENTER
This program serves to check the keyboard of the DDL 204. When "ENTER" is pressed, the following
appears in the display:
Press all Keys
If a key is pressed then, the key designation appears in the second line accordingly. After all the keys
have been activated successfully the display shows:
KEY TEST OK!
« »
The key test can be aborted at any time via "ENTER".
35
tNUODER TEST
START=ENTER
This program serves to check the rotary encoder. When "ENTER" is pressed, the following appears in
the display:
Turn Encoder
If the encoder is rotated, the direction of rotation and the counter pulses are shown in the second line.
One full rotation complies with 30 pulses. Pressing "ENTER" will terminate the program and the following
appears in the display:
ENC. TEST done
« »
A/D ADJUST
START=ENTER
This test serves to adjust the A/D converter in the DDL 204. When "ENTER" is pressed, the display shows
a 6-digit positive or negative value for each input channel.
CHI AD-TEST CH2
+ 000000-000000
Both channels must be adjusted to 0 with the trimmers R119 / R219. After pressing "ENTER" the display
shows the following, if the adjustment is ok:
ADJUSTION OK
« »
If one of the values is outside the tolerance range of +/-20, the following message appears:
ADJUSTION FAILED
« »
NOTE: For a correct adjustment it is necessary that the unit is switched on for some time in order to
bring the internal components to operating temperature!
36
ORIGINAL THRU
START=ENTER
With this program the input data of the DSP are passed thru directly to the outputs. No additional signal
processing is performed and the output is in the configuration 2 in 2, i.e. the input 1 is fed to the outputs
1 and 2 or, input 2 to the outputs 3 and 4.
Original thru
Level: 0 dB
With the rotary encoder a level between 0 and -99 dB can be set. The test is terminated by "ENTER" and
the display shows:
THRU TEST done
« »
SINE WAVE OUT
STARTsENTER
This test serves to check the complete signal path post DSP (digital filters, D/A converter, output
channels). After pressing the "ENTER" key the DSP generates a sine wave and feeds it to all 4 channels.
Sine Wave 250 Hz
Level: -24 dB
With the rotary encoder a level between 0 and -99 dB can be set. The test is terminated by "ENTER" and
the display shows:
SINE TEST done
« »
37
CUtfTTY T
(MUST BE REPLACED BY ORIGINAL PART)
40
TO DIGITAL CIRCUIT
DRAHING MW. 3<6 6?0
«<?:«
(
\
ini
CIRCUIT DI*GRW CONSISTS OF 2 DRAWINGS : 345 S77 2-
345 570 2-
PCB 00394 DIGITAL CIRCUIT
CIRCUIT DIAGRAM
5HEFT 2/2
346 678
DDL 204
2 -
i>fcKV JLV^E.
Liioi wc ormvL ri-iivxj
Pos. in diagram
description
Part-No.
i
i
Pos, in diagram
description
Part-No.
00010
plexiglas panel DDL 204
347876
i
i
C
402
K0-EL 1 MF 50V
340520
00040
push button black 12,5x7
337059
i
C
427
safety component
343489
00050
push button black 6,4x 13
4 342496
i
c
428
safety component
343489
00060
rotary knob black 16
342120
i
c
441
safety component
343489
00070
rotary knob black 24
348055
i
c
442
safety component
343489
00080
power supply
346713
i
c
507
K0-EL 220 MF 25V
343533
00090
display
344928
i
c
538
K0-EL 1 MF 50V
340520
i
c
539
K0-EL 1 MF 50V
340520
00010
PCB DRP10/DRP 15
852168
i
c
540
K0-EL 1 MF 50V
340520
B 401
connector
338835
i
D
150
diode IN 4002
304360
C 401
safety component 0,22MF
344934
i
D
151
diode IN 4148
301254
C 402
safety component 0,22MF
344934
i
D
152
diode IN 4140
301254
C 403
safety component 2.2NF
334682
i
D
501
diode IN 4148
301254
C 404
safety component 2.2NF
334682
i
D
502
diode IN 4148
301254
L 401
coil 2x 10 MH
332961
i
D
503
diode IN 4148
301254
S 401
mains switch
331175
i
D
504
diode IN 4148
301254
i
D
505
diode IN 4148
301254
00020
PCB DDL 204
862018
i
D
507
diode BAT 85
301297
D 101
LED 7xgn+3xrt
344868
i
E
301
relay AZ 845
346760
D 102
LED 7xgn+3xrt
344868
i
E
302
relay AZ 845
346760
D 103
LED red
345450
i
E
401
relay AZ 845
346760
D 104
LED red
345450
i
E
402
relay AZ 845
346760
D 105
LED red
345450
i
U
101
res.network RKL
8A
103 J
343457
D 106
LED red
345450
i
H
201
res.network RKL
8A
103J
343457
D 107
LED red
345450
i
H
301
res.network RKL
8A
103 J
343457
R 103
potentiometer 2x5kohm log
345484
i
H
302
res.network RKL
8A
103 J
343457
R 104
potentiometer 2x5kohm log
345484
i
H
303
res.network RKL
8A
103 J
343457
R 105
potentiometer 2x5kohm log
345484
i
H
304
res.network RKL
8A
103 J
343457
R 106
potentiometer 2x5kohm log
345484
i
H
401
res.network RKL
8A
103J
343457
R 107
potentiometer 2x5kohm log
345484
i
H
402
res.network RKL
8A
103 J
343457
R 108
potentiometer 2x5kohm log
345484
i
H
403
res.network RKL
8A
103 J
343457
S 101
switch
339674
i
H
404
res.network RKL
8A
103 J
343457
S 102
switch
339674
i
L
101
coil
339139
S 103
switch
339674
i
L
150
coil 47 UH
335966
S 104
switch
339674
i
L
151
coil 47 UH
335966
S 105
switch
339674
i
L
152
coil 47 UH/5,5A
333717
S 106
switch
339674
i
L
201
coil
339139
S 107
rotary encoder
346797
i
L
301
coil
339139
U 101
IC UAA 2022 P
^33487
i
L
302
coil
339139
i
L
401
coil
339139
00030
PCB DDL 204
803948
i
L
402
coil
339139
BT501
battery
341655
i
S
150
sliding switch
338886
C 101
safety component
346765
i
u
101
IC NE 5532 N
327197
C 102
safety component
346/65
i
u
102
IC NE 5532 N
327197
C 201
safety component
346765
i
u
103
IC NE 5532 N
327197
C 202
safety component
346765
i
u
150
IC AD 1879
346763
C 301
K0-EL 1 MF 50V
340520
i
u
151
IC MC 7805 C
309719
C 302
K0-EL 1 MF 50V
340520
i
u
152
IC MC 7905 CP
330834
C 327
safety component
343A89
i
u
201
IC NE 5532 N
327197
C 328
safety component
343489
i
u
202
IC NE 5532 N
327197
C 341
safety component
343489
i
u
203
IC NE 5532 N
327197
C 342
safety component
343489
i
u
301
IC PCM 69
346849
C 401
K0-EL 1 MF 50V
340520
i
u
302
IC NE 5532 N
327197
43
^KViCE - LIST OF SPARE PARTS
DDL 204
112485
Pos. in diagram
description #
Part-No.
Pos. in diagram
description
Part-No.
u
303
IC
NE 5532 N
327197
u
304
IC
NE 5532 N
327197
u
305
IC
NJM 4556 D
344864
u
306
IC
NE 5532 N
327197
u
307
IC
NE 5532 N
327197
u
308
IC
NJM 4556 D
344864
u
309
IC
MC 78 L 05 ACP
346343
u
401
IC
PCM 69
346849
u
402
IC
NE 5532 N
327197
u
403
IC
NE 5532 N
327197
u
404
IC
NE 5532 N
327197
u
405
IC
NJM 4556 D
344864
u
406
IC
NE 5532 N
327197
u
407
IC
NE 5532 N
327197
u
408
IC
NJM 4556 D
344864
u
409
IC
MC 78 L 05 ACP
346343
u
501
IC
SAB 80535 N
341631
u
502
IC
SN 74 HC573 N
341636
u
503
IC
P-IC DDL204
346951
u
504
IC
HM 6264 P20
334590
u
505
IC
P-IC DDL 204
346952
u
506
IC
TL 7705
335857
u
507
IC
SN 74 HC245 N
338389
u
508
IC
SN 74 HC574 N
341637
D
510
IC
TL 072 CP
331340
0
511
IC
MC 74 HC 14
333458
0
515
IC
MB 814400A
346762
X
501
quarz 24.0000MHZ
346851
44
WARRANTY (Limited)
Electro-Voice products are guaranteed against malfunction due to defects in materials or workman¬
ship for a specified period, as noted in the individual product-line statement(s) below, or in the
individual product data sheet or owner's manual, beginning with the date of original purchase. If such
malfunction occurs during the specified period, the product will be repaired or replaced (at our option)
without charge. The product will be returned to the customer prepaid. Exclusions and Limitations:
The Limited Warranty does not apply to: (a) exterior finish or appearance; (b) certain specific items
described in the individual product-line statement(s) below, or in the individual product data sheet or
owner’s manual; (c) malfunction resulting from use or operation of the product other than as specified
in the product data sheet or owner's manual; (d) malfunction resulting from misuse or abuse of the
product; or (e) malfunction occurring at any time after repairs have been made to the product by
anyone other than Electro-Voice or any of its authorized service representatives. Obtaining
Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, to
Electro-Voice or any of its authorized service representatives together with proof of purchase of the
product in the form of a bill of sale or receipted invoice. A list of authorized service representatives
is available from Electro-Voice at 600 Cecil Street, Buchanan, Ml 49107 (616/695-6831) and/or
Electro-Voice West, at 8294 Doe Avenue, Visalia, CA 93291 (209/651-7777). Incidental and
Consequential Damages Excluded: Product repair or replacement and return to the customer are
the only remedies provided to the customer. Electro-Voice shall not be liable for any incidental or
consequential damages including, without limitation, injury to persons or property or loss of use.
Some states do not allow the exclusion or limitation of incidental or consequential damages so the
above limitation or exclusion may not apply to you. Other Rights: This warranty gives you specific
legal rights, and you may also have other rights which vary from state to state.
Electro-Voice Electronics are guaranteed against malfunction due to defects in materials or
workmanship for a period of three (3) years from the date of original purchase. Additional details are
included in the Unifom Limited Warranty statement.
Service and repair address for this product: Electro-Voice, Inc. 600 Cecil Street, Buchanan, Michigan
49107.
Specifications subject to change without notice.
Electro-Voice a MARK IV company
600 Cecil Street. Buchanan. Michioan 49107, Phone (616) 695-6831, Fax: 616-695-1304
8234 Doe Avenue. Visalia. California 93291. Phone (209) 651-7777, Fax: (209) 651-0164
Mark IV Audio Canada. Inc. 345 Herbert St.. Gananoque. Ontario. Canada K7G2V1. Phone (613)382-2141. Fax (613)382-7466
Printed in Germany WEDE 01.10.93 / 348129
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