363-206-285
Technical Specifications
Issue 3 June 2001
10-35
Table 10-11. 24G-U/24H-U OLIU Link Budgets (Notes)
Notes:
Parameter 24G-U
24G-U
(S1:2) 24H-U
Minimum Wavelength (
λ
Tmin
) 1280 nm 1280 nm 1530 nm
Maximum Wavelength (
λ
Tmax
) 1335 nm 1335 nm 1570 nm
Spectral Width (
δλ
20
) 1.0 nm 1.0 nm 1.0 nm
Maximum Transmitter Power
∗(P
Tmax
)
+1.9 dBm +1.9 dBm +2.0 dBm
Minimum Transmitter Power (P
Tmin
) −3.0 dBm −2.5 dBm −2.5 dBm
Maximum Received Power (P
Rmax
) −8.0 dBm −8.0 dBm −8.0 dBm
Minimum Received Power (P
Rmin
) −30.0 dBm −30.5 dBm −31.0 dBm
Minimum System Gain (S-R) †27.0 dB 28.0 dB 28.5 dB
Optical Path Penalty (P
O
) ‡ 1.0 dB 1.0 dB 1.0 dB
Connector Loss § 1.5 dB 1.5 dB 1.5 dB
Unallocated Margin ¶ 1.5 dB 1.5 dB 2.0 dB
Minimum Loss Budget ∗∗ 10.0 dB 10.0 dB 10.0 dB
Maximum Loss Budget ††23.0 dB 24.0 dB 24.0 dB
Maximum Span Length ‡‡ 51 km 51 km 96 km
1. All terminology is consistent with TR-253, Iss. 2. All values are worst-case end of life.
2. All specifications for the 24G-U/24H-U meet or exceed long reach (LR) values described
in TR-253, Iss. 2.
∗ Transmit and receive powers are referenced to points S and R as shown in Figure 10-2.
†The minimum system gain for the DDM-2000 already takes into account aging,
temperature, and manufacturing tolerances as these figures are built into the minimum
transmitter power. The DDM-2000 system gain can, thus, not be directly compared with
the DDM-1000 system gain because the DDM-1000 system gain does not include all of
these effects. A similar penalty, called eye margin, is subtracted from the DDM-1000 loss
budget after the value of system gain is determined.
‡ Optical path penalty includes effects of dispersion, reflection and jitter that occur on the
optical path. The 24G-U has 4.0 dB of total margin. Optical path penalty is normally
1.0 dB. The 24H-U has 4.5 dB of total margin. Optical path penalty is normally
1.0 dB, which implies 1800 psec/nm total dispersion. Typical nondispersion fiber has
10 psec/nm km dispersion in the 1550 nm wavelength range.
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