Cabletron Systems SEHI-22FL User Guide

The EPIM-F3 (Figure A-3) supports Single Mode Fiber Optic cabling. It 
has an internal Cabletron Systems FOT-F Fiber Optic Transceiver and is 
equipped with ST Connectors. EPIM-F3 specifications are listed below.

Transmitter Power decreases as temperatures rise and increases as 
temperatures fall. Use the Output Power Coefficient to calculate increased 
or decreased power output for the operating environment. For example, 
the typical power output at 25

°

C is -16.4 dBm. For a 4

°

C temperature 

increase, multiply the typical coefficient (-0.15 dBm) by four and add the 
result to typical output power (4 x -0.15 dBm + -16.4 = -17.0).

The transmitter power levels given above are Peak Power Levels after 
optical overshoot. Use a Peak Power Meter to compare the values given 
above to those measured on any particular port. If you are using an 
Average Power Meter, add 3 dBm to the measurement to compare the 
average power values to the values listed above
(i.e., -33.5 dBm average + 3 dBm = -30.5 dBm peak).

Transmitter Peak 
Wave Length

1300 nm

1270 nm

1330 nm

Spectral Width

60 nm

    -

100 nm

Rise Time

3.0 ns

2.7 ns

5.0 ns

Fall Time

2.5 ns

2.2 ns

5.0 ns

Duty Cycle

50.1%

49.6%

50.7%

Bit Error Rate

Better than 10

-10

1490_32

SEHI Book  Page 3  Friday, April 19, 1996  10:46 AM