Shure DT 6008 User manual

@2015 Shure Incorporated
User Manual DCS 6000 Digital IR System rev L.docx
Conferencing and Discussion Systems
DCS 6000 Digital IR System
USER GUIDE

DCS 6000 Digital IR System User Manual
@2015 Shure Incorporated User Manual DCS 6000 Digital IR System rev L.docx
Table of Contents
Table of Contents .................................... 2
Important ................................................ 4
Important Safeguards .......................... 4
Installation precautions ....................... 4
Cleaning ............................................... 4
Repacking ............................................. 4
Warranty .............................................. 4
System description and planning ............. 5
System overvie .................................. 5
Infra-red transmitter .............................. 5
Infra-red radiators ................................. 5
Infra-red receivers ................................. 5
System technology ............................... 5
IR radiation ........................................... 5
Signal Processing ................................... 6
Quality modes ....................................... 6
Carriers and channels ............................. 7
Aspects of IR distribution systems ....... 7
Receiver directional sensitivity ................. 7
Foot rint of the radiator ......................... 7
Ambient lighting .................................... 8
Objects, surfaces and reflections ............. 9
Positioning the radiators ......................... 9
Overla ing foot rints and multi ath effects
......................................................... 10
Planning an DCS 6000 Digital infra-red
radiation system ................................. 11
Rectangular foot rints .......................... 11
Planning radiators ................................ 12
Cabling ............................................... 12
Setting radiator delay s itches .......... 12
System with one transmitter ................. 13
System with two or more transmitters in
one room ............................................ 15
System with more than 4 carriers and a
radiator under a balcony ....................... 16
Testing the coverage area .................. 16
Testing during installation ..................... 16
Testing during a meeting ......................16
Testing all ositions ..............................16
Bad coverage ......................................16
Black s ots..........................................16
Interference from IR systems ................17
DT 6008 & DT 6032 Transmitters........... 18
Description ......................................... 18
Installation ......................................... 19
Connections ........................................ 19
Connecting the DCS 6000 Conference
System ...............................................19
Connecting other audio sources .............19
Connecting an emergency signal ............19
Connecting another transmitter .............20
Using the configuration menu ............. 21
Overview ............................................21
Navigate through the menu ...................21
Exam les ............................................23
Configuration and operation ............... 26
Start-u ..............................................26
Main menu ..........................................26
View transmitter status .........................27
View fault status ..................................27
Set monitoring o tions .........................28
View version information .......................28
Set transmission mode .........................29
Set number of channels ........................29
Set channel quality and assign in uts to
channels .............................................30
Set channel names ...............................31
Disable or enable carriers ......................31
View carrier assignments ......................31
Configure auxiliary in uts......................32
Set sensitivity of the in uts ...................32
Enable / disable IR-monitoring ...............33
Enable/disable head hone out ut...........33
Choose transmitter name ......................33

DCS 6000 Digital IR System User Manual
@2015 Shure Incorporated User Manual DCS 6000 Digital IR System rev L.docx
Reset all o tions to factory default values33
Digital Radiators.................................... 34
Medium & High Po er Radiators ........ 34
Descri tion ......................................... 34
Radiator status indication ..................... 34
Mounting the radiators ......................... 35
Connecting radiators to the transmitter .. 37
Digital Receivers ................................... 38
Description ......................................... 38
Operation ........................................... 38
Reception test mode ........................... 39
Receiver headphones .......................... 39
CT 6056 Charging Tray .......................... 40
Description ......................................... 40
Charging procedure ............................ 40
Troubleshooting .................................... 41
Typical schematics ................................ 43
Technical Specifications ........................ 44
System Specification .......................... 44
IR Transmitters Specification ............. 45
DT 6008/6032 Infrared Digital Transmitter
.........................................................45
Radiators & Accessories ...................... 46
RA 6013 / RA 6025 High Power Radiators46
WB 6000 Wall Mounting Bracket ............46
Receivers & Battery Packs .................. 47
DR 6004, DR 6008 & DR 6032 Digital IR
Receivers ............................................47
BP 6001 NiMH Battery Pack ...................47
Charging Trays .................................... 47
CT 6056 Charging Tray .........................47
Connection details .............................. 48
Mains cables ........................................48
Audio cables ........................................48
Ear hones ...........................................48
Emergency switch ................................48
Accessories ......................................... 49
Guaranteed footprints ......................... 50

DIS Digital Conference System User Manual
4
Important
Important Safeguards
Prior to installing or operating this product
al ays read the Safety Instructions hich are
available as a separate document.
Installation precautions
Do not install the unit in a location near heat
sources such as radiators or air ducts, or in a lace
ex osed to direct sunlight, excessive dust or
humidity, mechanical vibration or shock.
To avoid moisture condensations do not install the
unit where the tem erature may rise ra idly.
When the rechargeable battery ack is used, it is
advisable to check regularly after three years that
the batteries are not leaking. If there is any sign of
leakage or corrosion, re lace the battery ack.
Ensure that only the battery ack BP 6001 is used.
The battery ack has to be re laced at least every
five years.
Cleaning
To kee the cabinet in its original condition,
eriodically clean it with a soft cloth. Stubborn
stains may be removed with a cloth lightly
dam ened with a mild detergent solution. Never
use organic solvents such as thinners or abrasive
cleaners since these will damage the cabinet.
Repacking
Save the original shi ing cardboard box and
acking material; they will become handy if you
ever have to shi the unit. For maximum
rotection, re- ack the unit as originally acked
from the factory.
Warranty
The individual units in the DCS 6000 system are
minimum covered by 12 months warranty
against defects in materials or workmanshi .

DIS Digital Conference System User Manual
5
System description and planning
System overview
DCS 6000 Digital IR is a system for wireless
distribution of audio signals via infra-red radiation.
It can be used in a simultaneous inter retation
system for international conferences where multi le
languages are used.
To enable all artici ants to understand the
roceedings, inter reters simultaneously translate
the s eaker’s language as required. These
inter retations are distributed throughout the
conference venue, and delegates select the
language of their choice and listen to it through
head hones.
The DCS 6000 Digital IR system can also be used
for music distribution (mono as well as stereo).
Figure 0-A DCS 6000 Digital IR system overview (with DCS 6000-
system as input)
The DCS 6000 Digital IR Audio distribution System
com rises one or more of the following:
Infra-red transmitter
The transmitter is the core of the DCS 6000 Digital
IR system. Two ty es are available:
•DT 6008 with in uts for 8 audio channels
•DT 6032 with in uts for 32 audio channels
Infra-red radiators
Two ty es of radiators are available:
•RA 6013 medium- ower radiator for small/
medium conference venues
•RA 6025 high- ower radiator for medium/large
conference venues
Both ty es can be switched between full and half
ower use. They can be mounted on walls,
ceilings or floor stands.
Infra-red receivers
Three multi-channel infra-red receivers are
available:
•DR 6004 for 4 audio channels
•DR 6008 for 8 audio channels
•DR 6032 for 32 audio channels
They can o erate with a rechargeable NiMH
battery ack or with dis osable batteries.
Charging circuitry is incor orated in the receiver.
Note: The charging unit used for charging the
receivers fitted with a rechargeable NiMH battery
pack as well as the rechargeable battery pack will
not be available before year 2006.
System technology
IR radiation
The DCS 6000 Digital IR system is based on
transmission by modulated infra-red radiation.
Infra-red radiation forms art of the electro-
magnetic s ectrum, which is com osed of visible
light, radio waves and other ty es of radiation. It
has a wavelength just above that of visible light.
Like visible light, it is reflected from hard
surfaces, yet asses through translucent
materials such as glass.
The infra-red radiation s ectrum in relation to
other relevant s ectra is shown in Figure 0-A.
1 Daylight s ectrum
2 Sensitivity of the human eye
3 IR radiator
4 Sensitivity of IR sensor
5 Sensitivity of IR sensor with daylight filter
Figure 0-A Infra-red radiation spectrum in relation to other
spectra
100
75
1
42
50
25
0400 500 600 700 800
5 3
900 1000 nm
%

DIS Digital Conference System User Manual
6
Signal Processing
The DCS 6000 Digital IR system uses high
frequency carrier signals (ty ically 2-8 MHz) to
revent interference roblems with modern light
sources (see section ‘IR radiation’). The digital
audio rocessing guarantees a constant high audio
quality. The signal rocessing in the transmitter
consists of the following main ste s (see Figure
0-B):
1. A/D conversion - Each analogue audio channel
is converted to a digital signal.
2. Compression - The digital signals are
com ressed to increase the amount of
information that can be distributed on each
carrier. The com ression factor is also related to
the required audio quality.
3. Protocol Creation - Grou s of u to four digital
signals are combined into a digital information
stream. Extra fault algorithm information is
added. This information is used by the receivers
for fault detection and correction.
4. Modulation - A high frequency carrier signal is
hase-modulated with the digital information
stream.
5. Radiation – U to 8 modulated carrier signals
are combined and sent to the IR radiators, which
convert the carrier signals to modulated
infra-red light. In the IR receivers a reverse
rocessing is used to convert the modulated
infra-red light to se arate analogue audio
channels.
In the IR receivers a reverse rocessing is used
to convert the modulated infra-red light to
se arate analogue audio channels .
Quality modes
The DCS 6000 Digital IR system can transmit
audio in four different quality modes:
•Mono, conference quality, maximum 32
channels (standard quality)
•Mono, Hi FI quality, maximum 16
channels ( remium quality)
•Stereo, conference quality, maximum 16
channels (standard quality)
•Stereo, Hi FI quality, maximum 8
channels ( remium quality)
The conference quality mode uses less
bandwidth and can be used for transmitting
s eech. For music the HI-FI quality mode gives
near CD quality.
Figure 0-B Overview of the signal processing (for one carrier)
A/D Conversion
& Compression
A/D Conversion
& Compression
Audio
Channel
Audio
Channel
Protocol Creation
& Modulation
4x Carrier (to IR Radiators)
4x

DIS Digital Conference System User Manual
7
Carriers and channels
The DCS 6000 Digital IR system can transmit u to
8 different carrier signals (de ending on the
transmitter ty e). Each carrier can contain u to 4
different audio channels.
The maximum number of channels er carrier is
de endent on the selected quality modes. Stereo
signals use twice as much bandwidth as a mono
signal, remium quality uses twice as much
bandwidth as standard quality. Per carrier a mix of
channels with different quality modes is ossible, as
long as the total available bandwidth is not
exceeded.
The table below lists all ossible channel
combinations er carrier:
Figure 0-C Directional characteristics of the receivers
Channel Quality
Mono
Conference
Mono
Hi-Fi
Stereo
Conference
Stereo
Hi-Fi
Band idth
Possible
number of
channels
er carrier
4 4 x 10 kHz
2 1 2 x 10 kHz and 1 x 20 kHz
2 1 2 x 10 kHz and 1 x 10 kHz (left) and 1 x 10 kHz (right)
1 1 1 x 20 kHz and 1 x 10 kHz (left) and 1 x 10 kHz (right)
2 2 x 10 kHz (left) and 2 x 10 kHz (right)
2 2 x 20 kHz
1 1 x 20 kHz (left) and 1 x 20 kHz (right)
Figure 0-D Possible channel combinations per carrier
Aspects of IR distribution systems
A good infra-red distribution system ensures that all
delegates in a conference venue receive the
distributed signals without disturbance. This is
achieved by using enough radiators, laced at well
lanned ositions, so that the conference venue is
covered with uniform Irradiation of adequate
strength.
There are several as ects that influence the
uniformity and quality of the infra-red signal, which
must be considered when lanning an infra-red
radiation distribution system. These are discussed
in the next sections.
Receiver directional sensitivity
The sensitivity of a receiver is at its best when it is
aimed directly towards a radiator. The axis of
maximum sensitivity is tilted u wards at an angle
of 45 degrees (see Figure 0-C).
Rotating the receiver will decrease the
sensitivity. For rotations of less than +/- 45
degrees this effect is not large, but for larger
rotations the sensitivity will decrease ra idly.
Footprint of the radiator
The coverage area of a radiator de ends on the
number of transmitted carriers and the out ut
ower of the radiator. The coverage area of the
RA 6025 radiator is twice as large as the
coverage area of the RA 6013. The coverage area
can also be doubled by mounting two radiators
side by side. The total radiation energy of a
radiator is distributed over the transmitted
carriers. When more carriers are used, the
coverage area gets ro ortionally smaller.
The receiver requires a strength of the IR signal
of 4 mW/m2 er carrier to work without errors
(resulting in a 80 dB S/N ratio for the audio
channels). The effect of the number of carriers
on the coverage area can be seen in Figure 0-A

DIS Digital Conference System User Manual
8
and Figure 0-B. The radiation attern is the area
within which the radiation intensity is at least the
minimum required signal strength.
Figure 0-A Total coverage area of RA 6013 & RA 6025 for 1 to 8
carriers
Figure 0-B Polar diagram of the radiation pattern for 1, 2, 4 & 8
carriers
The cross section of the 3-dimensional radiation
attern with the floor of the conference venue is
known as the foot rint (the white area in Figure 0-C
to Figure 0-E).
This is the floor area in which the direct signal is
strong enough to ensure ro er rece tion, when the
receiver is directed towards the radiator. As shown,
the size and osition of the foot rint de ends on the
mounting height and angle of the radiator.
Figure 0-C The radiator mounted at 15° to the ceiling
Figure 0-D The radiator mounted at 45° to the ceiling
Figure 0-E The radiator mounted perpendicular (at 90°) to the
ceiling
Ambient lighting
The DCS 6000 Digital IR system is ractically
immune for the effect of ambient lighting.
Fluorescent lam s (with or without electronic
ballast or dimming facility), such as TL lam s or
energy saving lam s give no roblems with the
DCS 6000 Digital IR system. Also sunlight and
artificial lighting with incandescent or halogen
lam s u to 1000 lux give no roblems with the
DCS 6000 Digital IR system.
1
8
2
4

DIS Digital Conference System User Manual
9
When high levels of artificial lighting with
incandescent or halogen lam s, such as s otlights
or stage lighting are a lied, you should directly
oint a radiator at the receivers in order to ensure
reliable transmission. For venues containing large,
unscreened windows, you must lan on using
additional radiators.
For events taking lace in the o en air a site test
will be required in order to determine the required
amount of radiators. With sufficient radiators
installed, the receivers will work without errors,
even in bright sunlight.
Objects, surfaces and reflections
The resence of objects in a conference venue can
influence the distribution of infra-red light. The
texture and colour of the objects, walls and ceilings
also lays an im ortant role.
Infra-red radiation is reflected from almost all
surfaces. As is the case with visible light, smooth,
bright or shiny surfaces reflect well. Dark or rough
surfaces absorb large ro ortions of the infra-red
signal (see Figure 0-F). With few exce tions it
cannot ass through materials that are o aque to
visible light.
Figure 0-F The texture of the material determines how much light is
reflected and how much is absorbed
Problems caused by shadows from walls or furniture
can be solved by ensuring that there are sufficient
radiators and that they are well ositioned, so that
a strong enough infra-red field is roduced over the
whole conference area. Care should be taken not to
direct radiators towards uncovered windows, as
most of this radiation will subsequently be lost.
Positioning the radiators
Since infra-red radiation can reach a receiver
directly and/or via diffused reflections, it is
im ortant to take this into account when
considering the ositioning of the radiators. Though
it is best if receivers ick u direct ath infra-red
radiation, reflections im rove the signal rece tion
and should therefore not be minimized. Radiators
should be ositioned high enough not to be blocked
by eo le in the hall (see Figure 0-G and Figure
0-H).
Figure 0-G Infra-red signal blocked by a person in front of the
participant
Figure 0-H Infra-red signal not blocked by a person in front of the
participant
The figures below illustrate how infra-red
radiation can be directed to conference
artici ants. In Figure 0-I, the artici ant is
situated clear from obstacles and walls, so a
combination of direct and diffused radiation can
be received. Figure 0-J shows the signal being
reflected from a number of surfaces to the
artici ant.
Figure 0-I Combination of direct and reflected radiation
100% 40% 100% 80%

DIS Digital Conference System User Manual
10
Figure 0-J Combination of several reflected signals
For concentrically arranged conference rooms,
centrally laced, angled radiators located high u
can cover the area very efficiently. In rooms with
few or no reflecting surfaces, such as a darkened
film- rojection room, the audience should be
covered by direct ath infra-red radiation from
radiators ositioned in front.
When the direction of the receiver changes, e.g.
with varying seat arrangements, mount the
radiators in the corners of the room (see Figure
0-K). If the audience is always directed towards the
radiators, you do not need radiators at the back
(see Figure 0-L).
If the ath of the infra-red signals is artially
blocked, e.g. under balconies, you should cover the
‘shaded’ area with an additional radiator (see Figure
0-M). The figures below illustrate the ositioning of
the radiators:
Figure 0-K Radiator position for covering seats in a square
arrangement
Figure 0-L Radiator positioning in a conference hall with
auditorium seating and podium
Figure 0-M Radiator for covering seats beneath a balcony
Overlapping footprints and multipath
effects
When the foot rints of two radiators artly
overla , the total coverage area can be larger
than the sum of the two se arate foot rints. In
the overla area the signal radiation ower of
two radiators are added, which increases the
area where the radiation intensity is larger than
the required intensity.
However, differences in the delays of the signals
icked u by the receiver from two or more
radiators
can result in that the signals cancel each other
out (multi ath effect). In worst-case situations
this can lead to a loss of rece tion at such
ositions (black s ots).

DIS Digital Conference System User Manual
11
Figure 0-N Increased coverage area caused by added radiation
power
Figure 0-O Reduced coverage area caused by differences in cable
signal delay
Figure 0-N and Figure 0-O illustrate the effect of
overla ing foot rints and differences in signal
delays. The lower the carrier frequency, the less
susce tible the receiver is for differences in signal
delays. The signal delays can be com ensated by
using the delay com ensation switches on the
radiators (see section 0).
Planning an DCS 6000 Digital infra-red
radiation system
Rectangular footprints
Determining the o timal number of infra-red
radiators required to give 100% coverage of a hall
can normally only be done by erforming a site test.
However, a good estimation can be made by using
‘guaranteed rectangular foot rints’.
Figure 0-A and Figure 0-B show what is meant by a
rectangular foot rint. As can be seen, the
rectangular foot rint is smaller than the total
foot rint. Note that in Figure 0-B the ‘offset’ X is
negative because the radiator is actually mounted
beyond the horizontal oint at which the
rectangular foot rint starts.
The guaranteed rectangular foot rints for
various number of carriers, mounting heights
and mounting angles can be found in section 0.
The height is the distance from the rece tion
lane and not from the floor.
Figure 0-A A typical rectangular footprint for a mounting angle of
15°
Figure 0-B A typical rectangular footprint for a mounting angle of
90°
Guaranteed rectangular foot rints can also be
calculated with the foot rint calculation tool
(available on the documentation CD-ROM). The
given values are for one radiator only, and
therefore do not take into consideration the
beneficial effects of overla ing foot rints. The
beneficial effects of reflections are also not
included. As rule of thumb can be given for
systems with u to 4 carriers, that if the receiver
can ick u the signal of two adjacent radiators
the distance between these radiators can be
increased by a factor 1.4 a roximately (see
Figure 0-C).
W
H
L
X
X
W
H
L

DIS Digital Conference System User Manual
12
Figure 0-C The effect of overlapping footprints
Planning radiators
Use the following rocedure to lan the radiators:
1. Follow the recommendations in section 0 in
order to determine the ositioning of the
radiators.
2. Look u (in the table) or calculate (with the
Foot rint Calculation Program
DIS_FCPv5.3_.xlt) the a licable rectangular
foot rints.
3. Draw the rectangular foot rints in the lay-out of
the room.
4. If the receiver can ick u the signal of two
adjacent radiators in some areas, determine the
overla effect and draw the foot rint
enlargement(s) in the lay-out of the room.
5. Check whether you have sufficient coverage
with the radiators at the intended ositions.
6. If not so, add additional radiators to the room.
See Figure 0-K, Figure 0-L and Figure 0-M for
exam les of a radiator lay out.
Tip: The Footprint alculation Program
DIS_F Pv5.3_.xlt eases the work planning radiator
coverage. The Program is to be found at the ‘D S
6000 Digital IR System User Manual D’
Cabling
Signal delay differences can occur due to
differences in the cable length from the transmitter
to each radiator. In order to minimize the risk of
black s ots, use equal cable length from transmitter
to radiator if ossible (see Figure 0-D). When
radiators are loo -through connected, the cabling
between each radiator and the transmitter should
be as symmetrical as ossible (see Figure 0-E and
Figure 0-F). The differences in cable signal delays
can be com ensated with the signal delay
com ensation switches on the radiators.
Figure 0-D Radiators with equal cable length
Figure 0-E Asymmetrical arrangement of radiator cabling (to be
avoided)
Figure 0-F Symmetrical arrangement of radiator cabling
(recommended)
Setting radiator delay switches
As described in section 0, differences in the
delays of the signals icked u by the receiver
from two or more radiators can cause black s ots
as a result of the multi ath effect. The signals
icked u by the receiver are delayed by:
the transmission from transmitter to radiator
through the cable (cable signal delay)
the transmission from radiator to receiver
through the air (radiation signal delay)
L
R1 R2
R3 R4
R1 R2
R3 R4
W
1.4 W
1.4 L
50m
50m
50m
50m

DIS Digital Conference System User Manual
13
for systems with two or more transmitters: the
transmission through the slave transmitter(s)
To com ensate the signal delay differences, the
delay of each radiator can be increased. These
signal delays can be set with the delay switches at
the back of the radiator.
The cable signal delays can be determined in the
following two ways:
by measuring the cable lengths
by measuring the im ulse res onse time with a
delay measurement tool
In both cases the cable signal delays can be
calculated manually and with the delay switch
calculation tool (available on the documentation
CD-ROM). It is not necessary to calculate the cable
signal delay in case:
the radiators are directly connected to the
transmitter with equal cable length;
radiators are loo -through connected, but with
less than 5 m distance between the first and last
radiator in a trunk, and with equal cable length
between the first radiator in each trunk and the
transmitter.
In these cases set the delay switches on all
radiators to zero and determine whether to
com ensate for radiation signal delay (see section
0).
The next sections describe how to calculate the
delay switch ositions manually for systems with
one transmitter, or two or more transmitters. See
the delay switch calculation tool for the rocedures
how to calculate the delay switch ositions
automatically.
Tip: The Delay Switch alculation tool
DIS_DS v5.3a_.XLT eases the calculation of the
delay switch positions. The Program is to be found
at the ‘D S 6000 Digital IR System User Manual
D’.
System with one transmitter
Determining delay switch positions by
measuring the cable lengths
Use the following rocedure to determine the delay
switch osition based on cable lengths:
1. Look u the cable signal delay er meter of the
used cable. The manufacturer s ecifies this
factor.
2. Measure the lengths of the cables between the
transmitter and each radiator.
3. Multi ly the lengths of the cables between the
transmitter and each radiator with the cable
signal delay er meter. These are the cable
signal delays for each radiator.
4. Determine the maximum signal delay.
5. Calculate for each radiator the signal delay
difference with the maximum signal delay.
6. Divide the signal delay difference by 33. The
rounded off figure is the signal delay switch
osition for that radiator.
7. Add delay switch ositions for radiators under
a balcony, if a licable (see section 0).
8. Set the delay switches to the calculated
switch ositions.
Note: For systems with a cable length difference
of more than 50 meters, it is recommended to
use a measurement tool to determine the delay
differences in order to calculate the delay switch
positions.
Figure 0-A and Table 0-1 illustrate the calculation
of the cable signal delay.
Note: The used cable signal delay per meter is
an example. Use the actual signal delay per
meter in this calculation as specified by the
manufacturer.
Caution: Turn the delay switches carefully to a
new position until you feel that it clicks into
position, to prevent that a switch is positioned
between two numbers, which would result in a
wrong delay setting.
Figure 0-A System with five radiators and measured cable
lengths
20m
20m
30m
30m
R2
R5 R4
R3
R1
20m

DIS Digital Conference System User Manual
14
Radiator
number
Total cable
length [m]
Cable signal
delay per meter
[ns/m]
Cable signal delay
[ns]
Signal delay
difference [ns]
Delay s itch position
1 30 5,6 30*5.6 = 168 280-168 = 112 112/33 = 3.39 = 3
2 30+20 = 50 5,6 50*5.6 = 280 280-280 = 0 0/33 = 0
3 20 5,6 20*5.6 = 112 280-112 = 168 168/33 = 5.09 = 5
4 30 5,6 30*5.6 = 168 280-168 = 112 112/33 = 3.39 = 3
5 30+20 = 50 5,6 50*5.6 = 280 280-280 = 0 0/33 = 0
Table 0-1 Calculation of the cable signal delays
Determining delay switch positions by using a
delay measuring tool
The most accurate way to determine the cable
signal delays is to measure the actual signal delay
for each radiator as described in the following
rocedure:
1. Disconnect the cable from a radiator out ut of
the transmitter and connect this to a delay
measurement tool.
2. Disconnect a radiator from this cable.
3. Measure the im ulse res onse time (in ns) of
the cable(s) between the transmitter and the
radiator.
4. Reconnect the cable to the radiator and re eat
ste s 2 to 4 for the other radiators that are
connected to the same transmitter out ut.
5. Reconnect the cable to the transmitter and
re eat ste 1 to 5 for the other radiator out uts
of the transmitter.
6. Divide the im ulse res onse times for each
radiator by two. These are the cable signal
delays for each radiator.
7. Determine the maximum signal delay.
8. Calculate for each radiator the signal delay
difference with the maximum signal delay.
9. Divide the signal delay difference by 33. The
rounded off figure is the delay switch osition
for that radiator.
10. Add delay switch ositions to radiators under a
balcony, if a licable (see section 0)
Set the delay switches to the calculated delay
switch ositions.
Figure 0-B and Table 0-2 illustrate the calculation
of the signal delays and the delay switch
ositions.
Note The calculated delay switch positions based
on impulse response time can differ from the
calculated delay switch positions based on cable
lengths. This is caused by the accuracy of the
measurements and the accuracy of the cable
signal delay factor per meter as specified by the
manufacturer of the cable. If the impulse
response time is measured correctly, the
calculated delay switch positions will be the most
accurate.
Figure 0-B Calculation System with five radiators and measured
impulse response times
Radiator
number
Impulse response
time [ns]
Cable signal delay
[ns]
Signal delay
difference [ns]
Delay s itch position
1 350 350/2 = 175 292-175 = 117 117/33 = 3.54 = 4
2 584 584/2 = 292 292-292 = 0 0/33 = 0
3 237 237/2 = 118 292-118 = 174 174/33 = 5.27 = 5
4 339 339/2 = 169 292-169 = 123 123/33 = 3.73 = 4
5 563 573/2 = 281 292-281 = 11 11/33 = 0.33 = 0
Table 0-2 Calculation of the delay switch positions of a system with one transmitter
584 ns 350 ns
563 ns 339 ns
R2
R5 R4
237 ns
R1
R3

DIS Digital Conference System User Manual
15
System with two or more transmitters in one
room
When radiators in one multi- ur ose room are
connected to two transmitters, an extra signal delay
is added by:
Transmission from master transmitter to slave
transmitter (cable signal delay).
Transmission through the slave transmitter.
Use the following rocedure to determine the delay
switch ositions in a master-slave configuration:
1. Calculate the cable signal delay for each
radiator, using the rocedures for a system with
one transmitter.
2. Calculate the signal delay of the cable between
the master and the slave transmitter in the
same way as for cables between a transmitter
and a radiator.
3. Add to the cable signal delay of the cable
between the master and the slave, the delay of
the slave transmitter itself: 33 ns. This gives the
master-to slave signal delay.
4. Add the master-to-slave signal delay to each
radiator connected to the slave transmitter.
5. Determine the maximum signal delay.
6. Calculate for each radiator the signal delay
difference with the maximum signal delay.
7. Divide the signal delay difference by 33. The
rounded off figure is the signal delay switch
osition for that radiator.
8. Add delay switch ositions to radiators under
a balcony, if a licable (see section 0)
9. Set the delay switches to the calculated delay
switch ositions
Figure 0-C, Table 0-1, Table 0-3 and Table 0-4
illustrate the calculation of the extra master-
slave signal delay.
Figure 0-C System with master and slave transmitter in multi
purpose room
Cable length master-
slave transmitter [m]
Cable signal delay
per meter [ns/m]
Cable signal
delay [ns]
Signal delay
slave transmitter
[ns]
Master-to-slave signal delay
[ns]
50 5,6 50 x 5.6 = 280 33 280 + 33 = 313
Table 0-3 Calculation of the master-to-slave signal delays
Radiator
number
Transmitter
Master-to-
slave
signal
Cable signal
delay per
meter [ns/m]
Cable signal
delay [ns]
Signal delay
difference
[ns]
Delay s itch position
1 Master 0 168 0+168 = 168 593-168 = 425
425/33 = 12.88 = 13
2 Master 0 280 0+280 = 280 593-280 = 313
313/33 = 9.48 = 9
3 Master 0 112 0+112 = 112 593-112 = 481
481/33 = 14.58 = 15
4 Master 0 168 0+168 = 168 593-168 = 425
425/33 = 12.88 = 13
5 Master 0 280 0+280 = 280 593-280 = 313
313/33 = 9.48 = 9
6 Slave 313 168 313+168 = 481 593-481 = 112
112/33 = 3.39 = 3
7 Slave 313 280 313+280 = 593 593-593 = 0 0/33 = 0
8 Slave 313 112 313+112 = 425 593-425 = 168
168/33 = 5.09 = 5
9 Slave 313 168 313+168 = 481 593-481 = 112
112/33 = 3.39 = 3
10 Slave 313 280 313+280 = 593 593-593 = 0 0/33 = 0
Table 0-4 Calculation of the delay switch positions of a system with two transmitters
R1
50m
R3
R4
R6
Tx2
R5
R2 Tx1
50m
50m
50m
50m
50m
50m

DIS Digital Conference System User Manual
16
Note: When a master-slave configuration is used for rooms which are always separated, the delay switch
positions can be determined per system and the delay caused by transmission from master to slave
transmitter can be ignored.
Caution: Turn the delay switches carefully to a new position until you feel that it clicks into position, to
prevent that a switch is positioned between two numbers, which would result in a wrong delay setting.
System with more than 4 carriers and a
radiator under a balcony
Figure 0-D illustrates a situation in which a radiation
signal delay occurs and which can be com ensated
for. For systems with more than four carriers, add
one delay switch osition er 10 meter (33 feet)
difference in signal ath length to the radiators
which are closest to the overla ing coverage area.
In Figure 0-D the signal ath length difference is 12
meter. Add one delay switch osition to the
calculated switch osition(s) for the radiator(s)
under the balcony.
Figure 0-D Radiation path length difference for two radiators
Testing the coverage area
An extensive rece tion quality test must be done to
make sure that the whole area is covered with IR
radiation of adequate strength and that there are
no black s ots. Such a test can be done in two
ways:
Testing during installation
1. Check that all radiators are connected and
owered u and that no loose cables are
connected to a radiator. Switch the transmitter
off and on to re-initialize the auto equalization
of the radiators.
2. Set the transmitter in the Test-mode (see
section 0). For each channel, a different test
tone frequency will be transmitted.
3. Set a receiver on the highest available channel
and listen via the head hones to the transmitted
test tone.
4. Test all ositions and directions (see next
aragra h).
Testing during a meeting
1. Set a receiver in the Test-mode and select
the highest available carrier. The quality of
the received carrier signal is indicated on the
dis lay of the receiver (see section 0).
2. Test all ositions and directions (see next
aragra h). The quality indication should be
between 00 and 39 (good rece tion).
Testing all positions
With the transmitter and receiver in one of the
two test modes, go around the conference hall
and test the rece tion quality at every osition
where the infra-red signals must be received.
When an area is detected where there is bad
rece tion or even no rece tion at all, three main
causes must be considered:
Bad coverage
The receiver cannot ick-u infra-red radiation of
adequate strength. This can be because the
tested osition is outside the foot rint of the
installed radiators or the radiation is blocked by
obstacles such as a column, an overhanging
balcony or other large objects.
Check that you used the correct foot rints for the
system design, that radiators with enough out ut
ower are installed and that a radiator is not
accidentally switched to half ower o eration.
When the bad rece tion is caused by a blocked
radiation ath, try to remove the blocking
obstacle or add an extra radiator to cover the
shaded area.
Black spots
The receiver icks-u IR signals from two
radiators which cancel out each other. The
multi ath effect can be identified by the
observation that the bad rece tion only occurs
along a s ecific line and/or when good rece tion
returns when the receiver is rotated to another
direction.
This can be confirmed by kee ing the receiver in
the osition and direction with the bad rece tion
and then either shading-off the radiation from
16m 4m

DIS Digital Conference System User Manual
17
one radiator with your hand or switching off one
radiator. If this im roves the rece tion quality, then
the multi ath effect is causing the roblem. Note
that IR radiation that is reflected from a surface with
a high reflectabiliy can also cause multi ath
roblems.
Black s ots can occur in case a transmitter is
located in the same room as the radiators. In that
case, disable the mini IR radiator of the transmitter
with the configuration menu (see section 2.5.16).
Check that the signal delay com ensation switches
on the radiators are set to the correct value and that
a switch is not accidentally ositioned between two
numbers. Re-check your system design. When
necessary, reduce the distance between the two
radiators that cause the roblem and/or add an
extra radiator. Note that due to the hysical
characteristics of the signal distribution, it is not
always ossible to com letely avoid multi ath
effects.
Interference from IR systems
IR assistive hearing systems and IR micro hones
o erating at frequencies above 2 MHz can disturb
the rece tion at the lowest carriers. If such is the
case, disable the lowest two carriers (see section
0) and re-check the rece tion.

DIS Digital Conference System User Manual
18
DT 6008 & DT 6032 Transmitters
Description
The transmitter is the central element of the DCS
6000 Digital IR system. It acce ts asymmetrical
audio sources from a maximum of 32 external
channels (de endent on the transmitter ty e) and
can be used with the DCS 6000 Digital Conference
System. It can also be used with analogue
discussion and inter retation systems (e.g. CIE
9000), or as a stand-alone system distributing
external audio sources.
The transmitter is suitable for either table-to or
19-inch rack-mounted use. Four feet (for table to
use) and two mounting brackets (for rack
mounting) are su lied.
Figure 0-A Front view of DT 6008 and DT 6032 Transmitter
1. Mains on/off s itch – After switching the
mains on, the transmitter starts u and the
dis lay (3) will light-u .
2. Mini IR-radiator – Four IREDs, transmitting
the same infra-red signal as the radiator out ut.
This can be used for monitoring ur oses. They
can be disabled via the configuration menu.
3. Menu display – A 2x16 character LCD-dis lay
gives information about the transmitter status.
It is also used as a an interactive dis lay for
configuring the system.
4. Menu button – A turn-and- ush button to
o erate the configuration software in
combination with the dis lay (3).
5. Monitoring headphone output – A 3.5 mm
(0.14 inch) jack socket to connect a head hone
for monitoring ur oses. It can be disabled via
the configuration menu.
Note: The mini IR-radiator and the headphone
output can also be permanently disabled by
removing two resistors
Figure 0-B Back view of DT 6008 Transmitter
Figure 0-C Back view of DT 6032 Transmitter
1. Mains input – Euro mains socket. The
transmitter has automatic mains voltage
selection. A mains cable is rovided.
2. Emergency s itch connector – A
terminal block socket for a single,
‘normally o en’ switch. When the switch
is closed, the audio signal on the Aux right
in ut is distributed on all out ut channels,
overriding all other audio in uts.
3. Auxiliary audio inputs – Two female
XLR connectors for extra audio in uts.
They can be used to connect auxiliary
symmetrical audio signals such as a
music installation, the floor language or
emergency messages.
4. Audio signal inputs – 8 or 32 cinch
lugs to connect external asymmetrical
audio in ut signals. The number of
connectors de ends on the transmitter
ty e.
5. Radiator signal loop-through input –
A HF BNC connector to loo -through the
radiator out ut of another transmitter.
6. Radiator signal outputs – Six HF BNC
connectors, used to connect the
radiators. U to 30 radiators can be loo -
through connected to each out ut. RG59
Cable must be used.

DIS Digital Conference System User Manual
19
Installation
The transmitter can be laced on a table or
installed in a standard 19” rack.
When installing in a 19” rack the su lied 19”
brackets shall be fixed to the front side of the
transmitter by unscrewing the crews holding the
to and button cover and then fix the brackets
using the same screws.
Connections
This cha ter gives an overview of ty ical system
connections using the DT 60xx range transmitter:
Connecting the DCS 6000 Conference System
Connecting other external audio sources
Connecting an emergency signal switch
Connecting another transmitter
Connecting the DCS 6000 Conference
System
The transmitter is connected to DCS 6000
Conference System directly to a CU 6105 or CU
6110 or to an AO 6004 or AO 6008 Audio Out ut
Unit. Each AO 6008 can feed u to 8 ‘Audio Signal
In uts’ in the transmitter.
Figure 0-A Connecting the DCS 6000 Conference System.
Please refer to the individual DCS 6000 user
manuals for more information.
Connecting other audio sources
The transmitter has u to 32 audio in uts
(de ending on the transmitter ty e) to interface
with external asymmetrical audio sources, such as
congress systems from other manufacturers or
for music distribution.
The audio signals (stereo or mono) are
connected to the audio in ut cinch connectors.
Figure 0-B Connecting external audio sources to the transmitter
Connecting an emergency signal
To use the emergency signal function, a switch
(normally-o en) must be connected to the
emergency switch connector. The reaction of the
transmitter on a closed switch de ends on the
configuration of the auxiliary in uts (see also
section 0):
If the auxiliary in ut is 'Mono + Emergency',
the audio signal on the Aux-Right in ut is
distributed to all out ut channels, overriding
all other audio in uts.
If the auxiliary in ut is 'Stereo' or 'Stereo to
Mono', the audio signals on the Aux-Left and
Aux-Right in uts are distributed to all out ut
channels, overriding all other audio in uts.
Figure 0-C Connecting an emergency signal

DIS Digital Conference System User Manual
20
Connecting another transmitter
The transmitter can be o erated in slave mode to
loo through the IR radiator signals from a master
transmitter.
One of the six radiator out uts of the master
transmitter is connected with an RG59 cable to the
radiator signal loo -through in ut of the slave
transmitter.
The Transmission mode of the slave transmitter
must be set to ‘Slave’ (see section 0).
Figure 0-D Connecting another transmitter