363-206-285
Technical Specifications
10-28 Issue 3 June 2001
Table 10-6. 22D-U OLIU Link Budgets
Notes:
Parameter (Note 1) 22D-U
Minimum Wavelength (l
Tmin
) 1270/1260* nm
Maximum Wavelength (λ
Tmax
) 1380 nm
Spectral Width (δλ
rms
) 170 nm ¶¶
Maximum Transmitter Power
(P
Tmax
)
–14.0 dBm
Minimum Transmitter Power
(P
Tmin
)
–18.8/–21.8 dBm
Maximum Received Power
(P
Rmax
)
–14.0 dBm
Minimum Received Power (P
Rmin
) –33.8/–31.8* dBm
Minimum System Gain (S-R)‡ 15/10.0* dB
Optical Path Penalty (P
O
)§ 1.6 dB
Connector Loss¶ 1.5 dB
Unallocated Margin∗∗ 2.0 dB
Minimum Loss Budget 0.0 dB
Maximum Loss Budget‡‡ 9.9/4.9* dB
Maximum Span Length§§
1. All terminology is consistent with TR-253, Issue 2.
∗ When two numbers are given, the number before the slash is the specification for
operating under controlled environmental conditions. The number following the slash is
the specification for uncontrolled environmental conditions. If only one number is given,
it applies to both controlled and uncontrolled environmental conditions.
†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.
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