Model 2805-TR/2806-REC

Fiber Optic Transmitter/Receiver Pair

TRANSMISSION LINE INTERFACE
Operating distance is dependent upon optical fiber core diameter and the cable's optical attenuation. The table below indicates three cables that may be used at any data rate. These cables are available in connectorized assemblies to meet the exact configuration of your application.

S.I.Tech offers complete links including fiber optic cable, connectors, cable assemblies, and Bit-DriversŪ

System

Transmission:	Up to 6500 ft. (2 Km) with suitable graded index fiber optic cable
Typical Bit Error Rate:	Better than 10-9

Electrical Signal Input/Output

Format:	TTL
Connector:	Solder pads or DIP socket
Duty Cycle:	0 to 100%
Minimum Pulse Width:	50 nanoseconds
Data Rate:	DC to 20 Mbps NRZ
Input impedance:	TTL, optional 75 ohm TTL levels
Output Impedance:	Standard TTL logic output (sink 16 mA, source 400 mA)

Optical Transmitter

Output Power at 100mA LED Current:	10 microwatts (-20 dBm) into 50 micron fiber. Output power is pin selectable over a 10 dB range
Wavelength:	820 nanometers
Emitter Type:	LED
Optical Connector:	SMA compatible metal receptacle

Optical Receiver

Wavelength:	670 to 950 nanometers, 820 to 900 nanometers is optimum
Minimum Sensitivity:	(BER = 10-9) 1 microwatt (-30 dbm) 820 nanometers
Maximum Sensitivity:	10 microwatts
Minimum Optical Rise time required:	0.25 microseconds
Optical Connector:	SMA compatible metal receptacle
Operating Temperature:	0° C to 50° C
Size:	TR2805 (24 pin DIP) 1.2" x 0.75" x 0.37 " (3 x 1.9 x 0.94 cm) REC 2806 (40 pin DIP) 2.0" x 1.12 " x 0.37" (5 x 2.8 x 0.94 cm) Hybrid circuit in an all metal DIP
Weight:	TR/REC pair - 0.25 lb (100 grams)
standalone Version:	Model 2856 with power supply and Bit-DriverŪ enclosure 2817-T/R Mini Version
P.C. Board Version:	S.I.Tech 2865

Operating Distance for Fiber Optic Cable

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 cable imprint. On the other end, reverse the connection.