Bosch Appliances 3122 475 22015en manual Aspects of infra-red distribution systems

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INTEGRUS Installation and User Instructions System description and planning

en 3

 

 

1.2.4 Carriers and channels

The Integrus system can transmit up to 8 different car- rier signals (depending on the transmitter type). Each carrier can contain up to 4 different audio channels. The maximum number of channels per carrier is dependent on the selected quality modes. Stereo sig- nals use twice as much bandwidth as a mono signals, premium quality uses twice as much bandwidth as standard quality.

Per carrier a mix of channels with different quality modes is possible, as long as the total available band- width is not exceeded. The table below lists all possible channel combinations per carrier:

45

45

90

Figure 1.4 Directional characteristics of the receivers

Possible

number of

channels

per carrier

 

Channel quality

 

 

Mono

Mono

Stereo

Stereo

Bandwidth

Standard

Premium

Standard

Premium

 

 

 

 

 

 

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)

 

 

 

 

 

1.3Aspects of infra-red 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, placed at well planned positions, so that the conference venue is covered with uniform IR- radiation of adequate strength.

There are several aspects that influence the uniformity and quality of the infra-red signal, which must be con- sidered when planning an infra-red radiation distribu- tion system. These are discussed in the next sections.

1.3.1Directional sensitivity of the receiver

The sensitivity of a receiver is at its best when it is aimed directly towards a radiator. The axis of maxi- mum sensitivity is tilted upwards at an angle of 45 degrees (see figure 1.4). 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 rapidly.

1.3.2 The footprint of the radiator

The coverage area of a radiator depends on the num- ber of transmitted carriers and the output power of the radiator. The coverage area of the LBB 4512/00 radiator is twice as large as the coverage area of the LBB 4511/00. 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 proportionally smaller. The receiver requires a strength of the IR signal of 4 mW/m2 per 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 1.5 and figure 1.6. The radiation pattern is the area within which the radiation intensity is at least the minimum required signal strength.

Bosch Security Systems 2005-04 3122 475 22015en

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Contents Integrus Important Safeguards Table of contents Integrus Installation and User Instuctions Table of contents Bosch Security Systems 2005-04 3122 475 22015en Integrus Installation and User Instructions System overview System description and planningSystem technology Signal ProcessingIR radiation Quality modesCarriers and channels Aspects of infra-red distribution systemsDirectional sensitivity of the receiver Footprint of the radiatorRadiator mounted at 45 to the ceiling Ambient lightingPositioning the radiators 11 Infra-red signal blocked by a person in frontOverlapping footprints and multipath effects 14 Combination of several reflected signalsRectangular footprints Planning an Integrus infra-red radiation systemCabling Planning radiatorsSystem with one transmitter Setting the radiator delay switches20m System with two or more transmitters in one room Calculation of the master-to-slave signal delays Testing the coverage area Interference from IR systems Description Integrus TransmittersIntegrus DCN interface module Audio interface modulesInterface module slot cover Mounting an interface module in the transmitter housingRemoving the main PCB and the rear panel Upgrading an LBB4502/xx to an INT-TXRemoving the main PCB and the rear panel steps 1 Installation of the INT-TXKInstallation of the INT-TXK steps 1 Connecting the DCN Next Generation Connecting the DCN systemConnecting other external audio sources ConnectionsConnecting to another transmitter Connecting an emergency signalOverview Using the configuration menuTo navigate through the Main menu Navigate through the menuTo jump to a sub-menu To navigate through a sub-menuTo jump back from a sub-menu to an item of the Main menu ExamplesExample 1 Disable carrier 2. See also section Turn to move the cursor Required channel num Setup Back Start-up Configuration and operationMain menu View transmitter statusDCN View fault statusView version information Set monitoring optionsSet network mode Set transmission modeSet number of channels Set channel quality and assign inputs to channels Per Channel Settings Set channel names View carrier assignments Disable or enable carriersConfigure auxiliary inputs Enable / disable headphone output Enable / disable IR-monitoringPer Input Sensitivity settings Set sensitivity of the inputsChoose transmitter name Reset all options to factory default valuesMedium and High Power Radiators Integrus RadiatorsDescription Radiator status indication Mounting the radiatorsAttaching the suspension bracket Wall mounting Mounting on a floor standConnecting radiators to the transmitter Ceiling mountingMounting on horizontal surfaces Using the output power selection switch Low Power Wide Beam RadiatorLimitations Mounting the RadiatorIntegrus Receivers Reception test mode Receiver headphonesOperation LBB 4560 Charging unit Integrus Charging UnitsWall mounting the charging cabinet Charging procedureTroubleshooting Integrus Installation and User Instructions Troubleshooting System Specification Technical DataTransmitter Upgrade Kit range Radiators and AccessoriesMedium and High Power Radiators Transmitters and ModulesLow Power Wide Beam Radiator Receivers, Battery Packs and Charging UnitsNiMH Battery Pack Wall Mounting BracketConnection details Guaranteed rectangular footprints Angle Product index

3122 475 22015en specifications

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