Integrus Testing | en 67
Bosch Security Systems B.V. Installation and Operation manual IOM-INT | V1.1 | 2010.12
causing the problem. Note that IR radiation that is reflected from a surface with a high
reflectively can also cause black spots.
Black spots 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 7.2.11 ).
– Check that the signal delay compensation switches on the radiators are set to the correct
value and that a switch is not accidentally positioned between two numbers.
– Re-check your system design. When necessary, reduce the distance between the two
radiators that cause the problem and/or add an extra radiator.
Note that due to the physical characteristics of the signal distribution, it is not always
possible to completely avoid black spots.
Interference from IR systems
IR assisted hearing systems and IR microphones operating at frequencies above 2 MHz, can
disturb the reception at the lowest carriers. If such is the case, disable the lowest two carriers
(see section 7.2.7 ) and re-check the reception.
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