Receive Characteristics; Worst-Case Power Budget And Penalties - Nortel BayStack 450 Using Manual

Receive Characteristics

Table B-3
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
1 Measured with conformance test signal at TP3 for BER = 10
2 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.
3 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
models:
Note: The link power penalties
calculations only. They are not requirements and are not meant to be tested.
302401-D Rev 00
lists the receive characteristics for the 1000BASE-SX models:
,
1 2
3
lists the worst-case power budget and penalties for the 1000BASE-SX
Gigabit Fiber Optical Characteristics
62.5 Micron
Multimode Fiber
1.25 ± 100 ppm
770 to 860
0
– 17
12
– 12.5
1500
2.60
–12 at the eye center.
(Table B-4) are used for link power budget
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