Installation Instructions

For more information about the 40GBASE-LR4 transceiver, including test and measurement
information, see the IEEE 802.3–2012 standard.
Table 35: IEEE 802.3–2012 40GBASE-LR4 transceiver specifications
Parameter Specification
Distance Up to 10 kilometers
Transmitter characteristics
Line rate 10 Gbps
Signaling rate, each lane 10GBase 10.3125 Gbps
Data rate, total 40GBase 41.25 Gbps
Lane wavelength ranges 1264.5 nanometers to 1277.5 nanometers
1284.5 nanometers to 1297.5 nanometers
1304.5 nanometers to 1317.5 nanometers
1324.5 nanometers to 1337.5 nanometers
Total average optical power 8.3 dBm
Minimum average optical power, each lane at 10.3125
Gbps.
–7 dBm
Maximum average optical power, each lane at 10.3125
Gbps.
2.3 dBm
Difference in optical power between any two lanes 6.5 dB
Minimum side mode suppression ratio 30 dB
Minimum optical modulation amplitude –4 dBm
Maximum optical modulation amplitude 3.5 dBm
Maximum average optical power of OFF transmitter,
each lane
–30 dBm
Minimum extinction ratio at 10.3125 Gbps 3.5 dB
RIN
20
OMA (maximum) –128 dB/Hz
Maximum optical return loss tolerance 20 dB
Receiver characteristics
Line rate 10 Gbps
Signaling rate, each lane 10GBase 10.3125 Gbps
Data rate, total 40GBase 41.25 Gbps
Lane wavelength ranges 1264.5 nanometers to 1277.5 nanometers
1284.5 nanometers to 1297.5 nanometers
1304.5 nanometers to 1317.5 nanometers
1324.5 nanometers to 1337.5 nanometers
Average receive power, each lane at 10.3125 Gbps. –13.7 to 2.3 dBm
Maximum receiver power, each lane in OMA. 3.5 dBm
QSFP+
May 2017 Installing Transceivers and Optical Components on VOSS 66
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