Lucent Technologies WaveStar OLS 40G, Руководство по установке

Страница: 577 / 578

Issue 1.0 March 2001
I-5
365-575-389
Installation Manual Line Buildout (LBO)
1550-nm Single-Mode Attenuators —
Green LBOs
Description
A family of Single-Mode to Single-Mode LBOs was developed to operate at
1550 nm. The improvements achieved over the broadband design were in
attenuation tolerance, power handling, and attenuation selectivity. These
attenuators are to be used with circuit packs having single mode (SM) inputs and
are an excellent choice to be used with DWDM Systems where precise
attenuation and higher power levels are required. Using these attenuators with
OC-3 or OC-12 Multimode inputs will negate the value of the attenuator. A
single-mode to multimode transition attenuator (Gray in color) must be used (refer
to Table I-4 on page I-6).
Table I-3 lists the specifications for this type of LBO.
Table I-3. 1550-nm Single-Mode Attenuators Specifications
1550-nm Single-Mode Attenuator — Color: Green
Connector Types ST and FC
Connection Type Single Mode (SM) to Single Mode (SM)
Power Tested to 20 dBm for all values of attenuation
Internal Element Clear plastic for all values of attenuation
Attenuation Values (dB) 3 to 15 dB in 0.5-dB steps, and 16, 18, and 20 dB
Note: 0.5-dB indicated by +: ex. 6+ = 6.5 dB
Note: Use Figure I-1 for orientation when reading
6 or 9 dB.
Attenuation values are 5% to 10% in dB greater at
1310 nm.
Attenuation Tolerance [3 to 15 dB: +/–0.3 dB] [16 dB: +/-0.5 dB]
[18 to 20 dB: +/-1 dB]
Operating Temperature –40
°
C to +75
°
C
Wavelength of Ratings 1550 nm