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Model 2336

Twinax to Fiber Optic Modem

S.I. Tech Model 2336 Twinax to Fiber Optic Modem

The S.I.Tech Bit-Driver® is designed to work with IBM 3/X & AS/400 systems using twinax cable. Model 2836 Bit-Driver is a twinax to fiber optic transmitter/receiver full duplex product implementing IBM Protocol. Normal operating data rate is 1 Mbps. This fiber optic Bit-Driver product eliminates many disadvantages of twinax, especially EMI/RFI, ground loops (electrical isolation with fiber), high attenuation (high signal loss), limiting distance between nodes of system (5000 feet max. twinax), and potential lightning damage outdoors between buildings. S.I.Tech Model 2336 is a Eurocard product allowing easy change from twinax to fiber. Simply disconnect twinax and connect to model 2336 input/output port. Model 2336 is designed for use with series 3000 card cage.

Specifications

Operating Mode:	Synchronous, half or full duplex 1Mbps, Serial Bi-phase data
Input/Output Interface:	100 ohm RJ-11 bulkhead jack
Transmission Line Interface:	2 ST connector fiber optic receptacles (SMA option)
Transmission Distance:	6600 ft (2 km)
Transmitter Output power:	30 microwatts into 50 micron fiber
System Wavelength:	820 nanometers (1300nm option)
Receiver Sensitivity:	3 microwatts at less than 10^-9 bit error rate
Operating Temperature:	0 °C to 50 °C
Enclosure:	19" rack
Card Size:	Eurocard 3.9" x 6.8" (9.9 x 7.3 cm)
Weight:	0.5 lb (200 grams)
Input Power:	110 or 230 VAC, 50/60 Hz into card cage power supply
standalone Version:	2836

Operating Distance for Fiber Optic Cable

S.I. Tech Model 2336 Diagram

Optical Unit Connection: Connect the optical transmission line to the T and R receptacles. Note which cable channel goes to T or R by noting the cable imprint. On the other end, reverse the connections.

IBM Specifications: Twinax 5000 ft. (1524 m) max; Local ports - 7 devices max; Remote ports - 4 devices max; 5751 Cluster controller; 5251 remote terminal controller; 5294 and 5394 controllers.
If other than twinax cable is used, impedance matching transformers (Balun) are needed.
Some fiber types in short distance application may overload the receiver.

S.I. Tech Model 2336 Diagram