Lucent Technologies FiberReach DDM-2000 - Page 494

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Technical Specifications
10-20
Issue 3 June 2000
Table 10-7. 22F-Type and 22G-Type OLIU Link Budgets
Notes:
Parameter
22F/22F-U/
22F2-U
22G-U 22G2-U 22G3-U
*
22G4-U
***
Minimum Wavelength (
λ
Tmin
) 1260 nm 1272 nm 1272 nm 1280 nm 1280 nm
Maximum Wavelength (
λ
Tmax
) 1360 nm 1350 nm 1350 nm 1335 nm 1335 nm
Spectral Width (
δ λ
rms
)
7.7 nm 3.0 nm 3.0 nm 4.0 nm 1.0 nm
Maximum Transmitter Power
†
(P
Tmax
)
−
8.0 dBm 0.0 dBm 0.0 dBm 0.0 dBm 0.0 dBm
Minimum Transmitter Power (P
Tmin
)
−
15.0 dBm
−
7.0 dBm
−
7.0 dBm
−
5.0 dBm
−
5.0 dBm
Maximum Received Power
†
(P
Rmax
)
−
7.0 dBm
−
7.0 dBm 0.0 dBm 0.0 dBm 0.0 dBm
Minimum Received Power (P
Rmin
)
−
34.0 dBm
−
34.0 dBm
−
34.0 dBm
−
34.0 dBm
−
34.0 dBm
Minimum System Gain (S-R)
‡
19.0 dB 27.0 dBm 27.0 dBm 29.0 dBm 29.0 dBm
Optical Path Penalty (P
O
)
§
1.0 dB 1.0 dBm 1.0 dBm 1.0 dBm 1.0 dBm
Connector Loss
¶
1.5 dB 1.5 dBm 1.5 dBm 1.5 dBm 1.5 dBm
Unallocated Margin
∗∗
1.5 dB 1.5 dBm 1.5 dBm 1.5 dBm 1.5 dBm
Minimum Loss Budget 0.0 dB 7.0 dBm 0.0 dBm 0.0 dBm 0.0 dBm
Maximum Loss Budget
‡‡
15.0 dB 23.0 dBm 23.0 dBm 25.0 dBm 25.0 dBm
Maximum Span Length
§§
33 km 51 km 51 km 55 km 55 km
1. All terminology is consistent with GR-253, Issue 2. All specifications for the 22F
OLIU meet or exceeds intermediate reach (IR) values described in GR-253, Iss. 2.
* The 22G3-U OLIU is fully compliant with SONET long reach applications. It is fully
compatible with the 22F-type, 22G-U, and 22G2-U OLIUs and will replace them.
Also see footnote ***.
† Transmit and receive powers are referenced to points S and R.
‡ 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.
¶ One connector (0.75 dB) on each end is assumed to connect station cable to outside
plant.