Summary of Contents for Linear COM3000
- Page 1 INFRARED RECEIVER 8 CHANNELS LC3.IRRC08 Operation manual Linear Technologie • 11 rue du Puits Rochefort • 42 100 Saint-Etienne V.2017 Tél: +33 (0)4 77 81 49 49 • Fax: +33 (0)4 77 81 49 40 • www.lineartech.fr...
- Page 2 TABLE OF CONTENTS 1. Safety operation Page 3 2. System introduction Page 4 3. Infrared receiver unit Page 9...
- Page 3 1. SAFETY OPERATION Firstly, thank you very much for using LINEARCOM3000 conference system. To make sure safety of equipment and user, please read this safety instruction carefully before installing and using and operate seriously according to this manual. Also please keep this safety instruction for future reference.
- Page 4 2. SYSTEM INTRODUCTION Brief introduction LINEARCOM3000 is a series product of digital infrared language distribution system. It uses both digital infrared audio transmitting and control technique and an IR digital infrared chip. They own LINEARCOM3000’s intellectual property. IRRC08 can be used in simultaneous interpretation systems for multi-language conferences.
- Page 5 System composition The system consists of a number (N) of audio sources, either analogue or digital, which are connected to a transmitter. The transmitter processes the audio signals into an electrical output to feed the infrared radiator. The infrared signal is received by the infrared receiver that processes the signal and outputs an audio signal and/or associated data.
- Page 6 Carriers System is transmitting within the 2 ~ 8 MHz frequency band. It can transmit up to 8 different carrier signals (depending on the transmitter type) Carriers 0 to 5 are according to IEC 61603-7. Aspects of infrared distribution A good digital infrared language distribution system ensures that all delegates in a conference venue receive the distributed signals without disturbance.
- Page 7 The direction and sensitivity of receiver unit The sensitivity of a receiver is at its best when it is aimed directly towards a radiator. To minimize the disadvantage of this aspect, IRRC08 receiver adopts an ingenious structural design with peculiar 270° ultra wide angle to get perfect IR capture and sound quality at any disposition.
- Page 8 If the path of the infrared signals is blocked, e.g. under balconies, at least one additional radiator is needed to cover the ‘shaded’ area. Overlapped footprints and multi-path effect If footprints of two radiators overlap, the total coverage area maybe larger than the sum of the two separate footprints.
- Page 9 Increased coverage area caused by added Reduced coverage area caused radiation power differences in cable signal delay The lower the carrier frequency, the less susceptible the receiver is for differences in signal delays. The signal delays can be compensated by adjusting the delay compensation switches on the radiators.
- Page 10 • Adopt high capacity rechargeable lithium battery. It will have no power consumption under power off or disconnecting earphone. • In the district of infrared signal, quantity of receivers is unlimited. • Shield automatically unwork channels; working channel quantity is same as available channel quantity.
- Page 11 Infrared receiver schematic diagram Functions and indications 1. Infrared red filtering glass2 - “VOLUME+” is volume increasing 2. LCD - “VOLUME-” is volume decreasing 3. Pocket clamp 8. Channel selector 4. Power switch “CHANNEL+” is channel increasing 5. Charging contacts “CHANNEL-”...
- Page 12 Note : When without earphone, press «Power» key, LCD could display last channel No and battery. Testing the coverage area To make sure that the whole area is covered with adequate IR radiation and avoiding thus black spots, an extended reception quality test should be done. The test can be done in two ways : •...
- Page 13 Linear Technologie • 11 rue du Puits Rochefort • 42 100 Saint-Etienne Tél: +33 (0)4 77 81 49 49 • Fax: +33 (0)4 77 81 49 40 • www.lineartech.fr...