Table 59: Optical budgets with C37.94 protocol
Type of LDCM
Short range (SR)
Short range (SR)
Medium range (MR) Long range (LR)
Type of fibre
Multi-mode fiber
glass 50/125 μm
Multi-mode fiber
glass 62.5/125 μm
Single-mode fiber
glass 9/125 μm
Single-mode fiber
glass 9/125 μm
Modem type
1MRK0002122-AB
1MRK0002122-AB
1MRK002311-AA
1MRK002311-BA
Contact type
ST
ST
FC/PC
FC/PC
Minimum output
power
1)
–21 dBm
–13.7 dBm
–3.2 dBm
–1.3 dBm
Minimum receiver
sensitivity
–32.5 dBm
–32.5 dBm
–30 dBm
–30 dBm
Optical link
budget
2)
11.5 dB
18.8 dB
26.8 dB
28.7 dB
1) Minimum output power is measured with 1 m of the selected fiber and the high power mode.
2) The optical budget includes a satisfactory margin for aging in transmitter and receiver during 20–30 years.
Table 60: Example of input data for calculating the optical budget (maximum distance)
Type of LDCM
Short range (SR)
Short range (SR)
Medium range (MR) Long range (LR)
Type of fibre
Multi-mode fiber
glass 50/125 μm
Multi-mode fiber
glass 62.5/125 μm
Single-mode fiber
glass 9/125 μm
Single-mode fiber
glass 9/125 μm
Modem type
1MRK0002122-AB
1MRK0002122-AB
1MRK002311-AA
1MRK002311-BA
Typical attenuation
in fibre-optic
cables
3 dB/km
3 dB/km
0.32 dB/km
0.21 dB/km
Attenuation/
Contact
1.5 dB/ST
1.5 dB/ST
0.3 dB/FC/PC
0.3 dB/FC/PC
Factory splice
attenuation
0.5 dB/splice
0.3 splices/km
0.5 dB/splice
0.1 splices/km
0.08 dB/splice
0.1 splices/km
0.08 dB/splice
0.1 splices/km
Repair splices
0.25 dB/splice
0.1 splices/km
0.25 dB/splice
0.1 splices/km
0.1 dB/splice
0.05 splices/km
0.1 dB/splice
0.05 splices/km
Fiber margin for
aging
0.1 dB/km
0.1 dB/km
0.01 dB/km
0.01 dB/km
Table 61: Example of calculating the optical budget (maximum distance)
Type of LDCM
Short range (SR)
Short range (SR)
Medium range (MR) Long range (LR)
Type of fibre
Multi-mode fiber
glass 50/125 μm
Multi-mode fiber
glass 62.5/125 μm
Single-mode fiber
glass 9/125 μm
Single-mode fiber
glass 9/125 μm
Modem type
1MRK0002122-AB
1MRK0002122-AB
1MRK002311-AA
1MRK002311-BA
Maximum distance
2 km
3 km
80 km
120 km
Attenuation in
fibre-optic cables
6 dB
9 dB
25.6 dB
25.2 dB
2 contacts
2 dB
3 dB
0.6 dB
0.6 dB
Factory splice
attenuation
0.3 dB
0.45 dB
0.64 dB
0.96 dB
Repair splices
0.1 dB
0.3 dB
0.8 dB
1.2 dB
Fiber margin for
aging
0.2 dB
0.3 dB
0.8 dB
1.2 dB
Table continues on next page
Section 20
1MRK 505 343-UEN B
Remote communication
710
Application manual
Содержание Relion 670 series
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