The Bosch LTC 4651 Bi-Phase/RS-232 Transceiver (Rack Module, 850nm) is used to transmit Bi-phase control code signals used in the Allegiant Series of controllers/switchers, various DVRs, multiplexers, and other camera control systems. It is also compatible with Manchester code and standard RS-232 signals, and operates in the 850 nm range.
The LTC 4651 Bi-Phase/RS-232 Transceiver supports NTSC, PAL, and SECAM standards and requires no user adjustments. The fiber optic cable can be up to 2 miles (3.5 km) in length. Use of fiber optic cable improves reliability, as the signals passing through it are difficult to tap, locate or detect. It is capable of operating over a wide temperature range, and is compatible with the RS-232C transceiver that is EIA Standard, RS-232C level compliant. Connection to the shielded twisted pair cable that carries the control signal is provided by the removable screw terminal type connector.
Simplex asynchronous data transmissions are carried out using 1 fiber, while full duplex asynchronous data transmissions are done using 2 fibers up to 64 kbaud. The LTC 4651 Bi-Phase/RS-232 Transceiver has a small and compact design that enables it to be connected directly to a camera's BNC connector. Power is obtained from a LTC 4637 Rack.