Installing and Operating a System

1
Installing and Operating a System

• System connections
• Signal delay calculation
• Programming the Transmitter
• Testing the reception quality

IO Manual
2
Connecting the DCN Next Generation system

• The transmitter can be directly connected to the
  optical network of the DCN Next Generation
  conference system by means of an optical network
  cable
• Network mode must be enabled

3
Connecting the DCN system

• The transmitter requires the DCN Interface Module
• The connections between DCN units and the
  transmitter are made in a loop-through
  configuration.

4
DCN interface module

• For interfacing with DCN
• Allows simultaneous interpretation generated by
  DCN
• LBB3423/20

5
Connecting the CCS800 and Interpreter desks

• The transmitter requires the Symmetrical Audio
  Input and Interpreters Module.
• Up to 12 6-Channels interpreter desks can be
  loop-through connected to the module.
• The floor signal for the interpreters desk is
  connected to the Aux-Left input of the
  transmitter.
• The floor signal from a CCS 800 discussion system
  line output or from an external audio source,
  such as an audio mixer.

6
Symmetrical Audio Input Module

• For use with analogue audio systems with 8
  symmetrical Inputs
• Up to 12 6-Channels interpreter desks LBB3222/04
• Automatic floor selection for unused
  interpretation channels
• LBB3422/20

7
Symmetrical Audio Input Module
8
Settings on the Audio Input Module

• Floor audio connection from CPSU line output to
  Aux. input of infra-red transmitter

9
Maximum cable length to interpreters desks

• Maximum Up to 12 6-Channels interpreter desks
  can be loop-through connected to the module.

10
Interface connection to Recording System
LBB3422/20 Symmetrical Audio Input Module
LBB3222/04 6-Channel Interpreters Desk
To be made locally
To recording system
11
Connecting other external audio sources

• The audio signals (stereo or mono) are connected
  to the audio input cinch connectors.
• When the cinch audio inputs are used in
  combination with inputs via one of the
  interface modules, the signals on
  corresponding channels are mixed.

12
Connecting an emergency signal switch

• To use the emergency signal function, a switch
  (normally-open) must be connected to the
  emergency switch connector.
• When the switch is closed, the audio signal on
  the Aux-right input is distributed to all output
  channels, overriding all other audio inputs. 
• The Aux. Input mode of the transmitter must be
  set to Mono Emergency

13
Connecting to another transmitter

• The transmitter can operated in slave mode to
  loop-through the IR radiator signals from a
  master transmitter.
• One of the six radiator outputsof the master
  transmitter is connected with an RG59 cable to
  the radiator signal loop-through input of the
  slave transmitter.  
• The Transmission mode of the slave transmitter
  must be set to Slave

14
Connecting radiators to transmitter

• The transmitter has six BNC connectors on the
  rear panel. They can each drive up to 30
  radiators in a loop-through configuration.
• The radiators are connected with RG59 cables (75
  Ohm).
• The maximum cable length per output is 900 m.
• Automatically cable termination by a built-in
  detection circuit.

15
Connecting radiators to transmitter

• Notes
• Never leave an open-ended cable connected to the
  last radiator in a loop-through chain.
• When connecting infra-red radiators, do not split
  the cable, else the system will not function
  correctly.

16
Signal delay calculation

• Setting the radiator delay compensation switches
• Differences in cable length between the
  transmitter and the radiators can cause black
  spots as a result of the multipath effect.
• The IR signal from a radiator with a long cable
  is delayed with respect to the signal from a
  radiator with a shorter cable.
• To compensate these cable length differences, the
  delay of a radiator can be increased to make it
  equal to the signal delay of the other radiators.
• This signal delay can be set with delay switches
  at the back of the radiator.

17
Signal delay calculation

• Two ways for determining delay compensation
  switch positions of the radiator.
• By measuring the cable lengths
• 1.1 Manual
• 1.2 delay switch calculation tool (recommended)
• By using a delay measuring tool
• 2.1 Manual
• 2.2 delay switch calculation tool (recommended)

18
Signal delay calculation 1.1

• To determine the delay switch position based on
  cable lengths and calculating manually follow the
  next steps
• Measure the lengths of the cables between the
  transmitter and each radiator.
• Multiply these cable length differences with the
  cable signal delay per meter (the manufacturer
  specified factor). This is the cable signal delay
  difference for that radiator.
• Determine the maximum signal delay.
• Calculate for each radiator the signal delay
  difference with the maximum signal delay.
• Divide the signal delay difference by 33. The
  rounded off figure is the signal delay switch
  position for that radiator.
• Set the delay switches to the calculated switch
  positions.

Cable Measuring
19
Signal delay calculation 1
20
Signal delay calculation 1.2

• To determine the delay switch position based on
  cable lengths and the delay switch calculation
  tool follow the next steps
• Start the calculation tool
• Select system type
• Fill-in the cable signal delay per meter of the
  used cable. (specified by the cable
  manufacturer).
• Fill-in the number of radiator(s) on each output
• Fill-in the measured cable lengths of the cables
  between the transmitter and each radiator.
• Set the delay switches on the radiator(s) to the
  automatically calculated switch positions.

Calculation tool
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Signal delay calculation 2.1

• To determine the delay switch position by delay
  measuring tool and calculating manually follow
  the next steps
• Disconnect the cable from a radiator output of
  the transmitter and connect this to a delay
  measurement tool.
• Disconnect the cable from the first radiator in
  that trunk.
• Measure the impulse response time (in ns) of the
  cable(s) between that transmitter and the
  radiator.
• Reconnect the cable to the radiator and repeat
  steps 2 to 4 for the other radiators (started by
  the next radiator in that trunk).
• Reconnect the cable to the transmitter and repeat
  step 2 to 5 for the other radiator outputs of the
  transmitter.
• Divide the impulse response times for each
  radiator by two. These are the cable signal
  delays for each radiator.

22
Signal delay calculation 2.1

1. Determine the maximum signal delay.
2. Calculate for each radiator the signal delay
   difference with the maximum signal delay.
3. Divide the signal delay difference by 33. The
   rounded off figure is the delay switch position
   for that radiator.
4. Set the delay switches to the calculated switch
   positions.

Delay Measuring
23
Signal delay calculation 2.2
24
Signal delay calculation 2.2

• To determine the delay switch position by delay
  measuring tool and the delay switch calculation
  tool the follow the next steps
• Start the calculation tool, Select system type,
  Fill-in the number of radiator(s) on each output
• Disconnect the cable from a radiator output of
  the transmitter and connect this to a delay
  measurement tool.
• Disconnect the cable from the first radiator in
  that trunk.
• Measure the impulse response time (in ns) of the
  cable(s) between that transmitter and the
  radiator.
• Enter this impulse response time in the
  calculation tool.
• Reconnect the cable to the radiator and repeat
  steps 2 to 4 for the other radiators (started by
  the next radiator in that trunk).

Calculation tool
25
Signal delay calculation 2.2

1. Reconnect the cable to the transmitter and repeat
   step 2 to 5 for the other radiator outputs of the
   transmitter.
2. When the cable signal delays are known, the delay
   switch calculation tool will calculate the delay
   switch positions automatically.

Calculation tool
26
Signal delay calculation with more transmitters

• When radiators in one multi purpose 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.

Calculation tool
27
Signal delay calculation with more transmitters

• For calculating the delay switch positions for a
  system with a master-slave configuration, use the
  following procedure
• Calculate the cable signal delay for each
  radiator, using the procedures for a system with
  one transmitter.
• 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.
• 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.
• Add the master-to-slave signal delay to each
  radiator connected to the slave transmitter.
• Determine the maximum signal delay.

Calculation tool
28
Signal delay calculation with more transmitters

1. Calculate for each radiator the signal delay
   difference with the maximum signal delay.
2. Divide the signal delay difference by 33. The
   rounded off figure is the signal delay switch
   position for that radiator.
3. Set the delay switches to the calculated delay
   switch positions.

Calculation tool
29
Signal delay calculation with more transmitters
50m
Tx Slave
Tx Master
30
Signal delay calculation with more transmitters
31
Radiation signal delay

• A situation in which a radiation signal delay
  occurs.
• For systems with more than four carriers, add one
  delay switch position per 10 meter difference in
  signal path length to the radiators which are
  closest to the overlapping coverage area.
• In this Figure the signal path length difference
  is 12 meter. Add one delay switch position to the
  calculated switch position(s) for the radiator(s)
  under the balcony.

Calculation tool
32
Transmitter menu structure
IO Manual
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Transmitter menu structure
IO Manual
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Transmitter menu structure
IO Manual
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Transmitter menu structure
IO Manual
36
Testing the reception quality

• An extensive reception quality test must be done
  to make sure that the whole area is covered with
  IR radiation of adequate strength. Such a test
  can be done during installation and during the
  meeting
• Test during installation
• Check that all radiators are connected and
  powered up and that no loose cables are connected
  to a radiator. Switch the transmitter off and on.
  (needed for the auto signal equalisation)
• Set the transmitter in the Test-mode. For each
  channel a different frequency test tone will be
  transmitted.
• Set a receiver on the highest available channel
  and listen via the headphones to the transmitted
  test tone.
• For testing all positions follow the instruction
  of chapter 1.6 of the Integrus Installation and
  Operating Instructions

37
Testing the reception quality

• Testing during the meeting
• Set a receiver in the Test-mode and select the
  highest available carrier. The quality of the
  received carrier signal is indicated on the
  display of the receiver.
• The quality indication should be between 00 and
  39 (good reception).
• For testing all positions follow the instruction
  of chapter 1.6 of the Integrus Installation and
  Operating Instructions

38
Installing and Operating a System

• End of section

Integrus menu