Optical-electrical converter LTX-5515 series

analogdigitaloptical fiber

Features • One analog plus four digital channels • DC to 25 MHz analog bandwidth • Input ranges of ± 1 V and ± 5 V • Analog signal digitised to 12 bit precision • Four independent digital (TTL) channels • DC to 48 Mb/s data rate (each channel) The LTX-5515 enables the precise conveyance of one analog channel plus four digital channels of information over fibre optic links ranging from metres to more than 10 kilometres. Incoming analogue data is digitised to 12-bit precision at 100 megasamples per second and transmitted over optical fiber at one giga-bit per second. The receiver acquires this digital data and accurately reconstructs the analog signal at the far end of the fibre optic link. The analogue signal bandwidth is from DC to 25 MHz (-3 dB ). Two input voltage ranges are provided, ± 1 Volt and ± 5 Volts. The input impedance of the transmitter analogue channel may be set to 50 ohms or 1 Mohm (75 ohms is optional). Multiplexed along with the analogue data, are four independent TTL/CMOS/LVTTL digital signals that may be toggled at rates of up to 48 Mb/s. Two models are available. Selection depends on the fibre type and the length of the fiber optic link that is required. The LTX-5515 (850 nm MM) transmits at 850 nm over multi-mode fiber optic links of up to 250 metres in length, while the LTX-5515 (1310 nm SM) transmits at 1310 nm over single-mode fiber to span distances exceeding 10 km.