Table 1 specifies
the input interface requirements. To assist in fault isolation, the
input interface activates a loss-of-signal (LOS) state when the optical
data cannot be detected.
Table 1. SX 50/125 μm and 62.5/125 μm multimode input interface characteristics
| Parameter |
Unit |
100-M5-SN-I (1.0625 Gbps) |
200-M5-SN-I (2.125 Gbps) |
400-M5-SN-I (4.250 Gbps) |
800-M5-SN-S (8.500 Gbps) |
1600-M5-SN-I (14.025 Gpbs) |
3200-M5-SN-I (28.05 Gpbs) |
| Saturation level (Pavg received), maximum 1 |
dBm |
0 |
0 |
0 |
0 |
0 |
2.0 |
| Optical Modulation Amplitude (OMA) (sensitivity), minimum
3 |
mW |
0.031 |
0.049 |
0.061 |
0.076 |
0.089 |
0.095 |
| Return loss, minimum 2 |
dB |
12 |
12 |
12 |
12 |
12 |
12 |
Notes:
- Based on any valid 8B/10B code pattern measured at, or extrapolated to, 10-12 BER.
Must meet this specification with worst-case conditions as specified in Table 1 for the output interface and Table 1 for the fiber optic link.
- This measurement is made using a 2 meter (minimum length) single mode duplex jumper cable and
includes only the power in the fundamental mode of the single mode fiber.
- FC-PI specifies receiver Optical Modulation Amplitude (OMA) instead of sensitivity and
Extinction Ratio (ER). Receiver sensitivity is the minimum optical average power (Pavg) required,
which can be derived from the equation Pavg = OMA ((ER+1)/2 x (ER-1)). The specified OMA at 1.0625
Gbps is equivalent to an average power of -17 dBm at ER=9dB.
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