Receive Characteristics; Worst-Case Power Budget And Penalties; Table B-3. 1000Base-Sx Receive Characteristics - Nortel BayStack 450-24T Using Manual

Receive Characteristics

Table B-3 lists the receive characteristics for the 1000BASE-SX models:
Table B-3. 1000BASE-SX Receive Characteristics
Description
Signaling Speed (range)
Wavelength (range)
Average receive power (maximum)
Receive sensitivity
Return loss (minimum)
Stressed receive sensitivity *, †
Receive electrical 3 dB upper cutoff frequency
(maximum)
Vertical eye-closure penalty ‡
* Measured with conformance test signal at TP3 for BER = 10
† Measured with a transmit signal having a 9 dB extinction ratio. If you use another extinction ratio, correct the stressed
receive sensitivity according to the extinction ratio penalty.
‡ Vertical eye-closure penalty is a test condition for measuring stressed receive sensitivity. It is not a required
characteristic of the receiver.

Worst-Case Power Budget and Penalties

Table B-4 lists the worst-case power budget and penalties for the 1000BASE-SX
models:
Note: The link power penalties (Table B-4) are used for link power budget
calculations only. They are not requirements and are not meant to be tested.
309978-D Rev 01
Gigabit Fiber Optical Characteristics
62.5 Micron
Multimode Fiber
1.25 ± 100 ppm
770 to 860
0
– 17
12
– 12.5
1500
2.60
at the eye center.
–12
50 Micron
Multimode Fiber Units
1.25 ± 100 ppm GBd
770 to 860 nm
0 dBm
– 17 dBm
12 dB
– 13.5 dBm
1500 MHz
2.20 dB
B-3