O p e r a t i o n
5 - 1 3
SG 20 00 Ins tal la tion and O pera tion M anua l
W a ve le ng th Se le c t io n Ju mp e r
The SG2-LR can be used with either 1310 nm or 1550 nm transmitters. An internal wavelength
selection jumper optimizes the optical power test point and optical power status indicator calibration
for the system wavelength. Note that the jumper has no effect on the optical-to-RF performance
(gain, flatness, slope) of the module.
The wavelength selection jumper is factory-set and provides optimum calibration in a 1310 nm
system.
If you need to reset the jumper:
1
If necessary, remove the SG2-LR from the node.
2
Remove the five screws securing the sheet metal cover to the module casting and remove the
cover. Note the position of the optical connector assembly so that you can replace it in the same
position when you re-assemble the module.
3
Carefully lift the fiber coiling tray until the wavelength selection jumper is visible. To avoid
damaging the fiber, do not lift the tray any more than is necessary to expose the wavelength
selection jumper.
4
Position the jumper block on the appropriate pins for the desired wavelength. Figure 5-15
illustrates the circuit board which is labeled to facilitate this step:
F i g u r e 5 - 1 5
W a v e l e n g t h s e l e c t i o n j u m p e r
1310
1550
Wavelength selection jumper
(shown in 1310 nm position)
5
Replace the fiber tray in the module taking care not to pinch the fiber between the coiling tray
and the circuit board or casting. Position the optical connector assembly in its original position.
6
Replace the sheet metal cover, being careful not to pinch the fiber. Install the five screws to
secure the cover. Torque the screws to 10-12 in-lbs.
Summary of Contents for Starline SG 2000
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