User manual SENNHEISER SI 1010

[. . . ] General The Infrared transmitter SI 1010 serves for wlreless transmission of audlo signals by means of a light modulating carrier of 95 kHz The unit is dellvered with four radiators, type SZI101O and a mains cable, type VZN 1010. Dlrect the radiators for even distribution of the emitted Infrared light in the room used for transmission. [. . . ] This limiting amplifier is capable to accept signals of approximately 40 dB above nominal deviation without producing a noticeable increase in Special operating conditions Satisfactory infrared transmission depends upon the amount of interferlng light In the room and upon its size. It can therefore become necessary in larger rooms (approximately larger than 200 m2) and to Improve the signal to nOlse ratio to connect several transmitters In parallel. the number of effectlve radiators ISthus also multiplied. Transmitters must be parallel-connected with a sync-cable. the sync-output @ of the master unit IS connected to the sync-input @ of a slave-transmitter and so on. A total of three unlts rTJaybe interconnected resulting in a number of 12 radiators for a large room. May be dlrectly - without extension cable Connected to a transmitter As option al accessones the radiator connection cables GZL 1010 @ with a length of 10 mare available from Sennheise: electronic Nevertheless, connectlon cables can be made up by the user or a qualified person in a length more suitable for the intended installation. For proper operation of the system it is of great importance that only cable material of the type LiYCY 4 x 0. This matenal may be ordered from Sennheiser and IS order-coded: LV 12-1022. Important: Self-made cables must not exceed the maximum length given in the table. [. . . ] Remove plastic cover on circuit board near tt power switch. Current flow of power stage from pin 1 5 3 ~ ground, screen appx. [. . . ]