CANOGA PERKINS 2262 T1/E1 Fiber Optic Modem - Manual (Page 10)

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Canoga Perkins 2262 T1/E1 Fiber Optic Modem
2.2.3 Loss Budget
The maximum possible distances with the standard versions is dependent on the
overall optic loss over the fiber optic link. This is called the "loss budget." The loss
budget is determined by comparing the launch power at the modem with receiver
sensitivity at the other end of the link. The differential is the loss budget. Refer to
Table 2-A for 2262 loss budgets.
Table 2-A.
2262 Loss Budgets
NOTE: To measure the optical power, data must be present at the
data input leads.
850nm 1310nm
LED Laser
Cable Standard
62.5/125 15
8-10/125 N/A 20
N/A
2.3 Stand Alone Installation
Installing the stand alone version of the 2262 modem is straightforward. It should
be located convenient to the operator, but the electrical and optical cables should
be isolated from foot traffic to prevent possible damage to the fiber optics. See
Figure 2-1 for available rear panel configurations.
The main components of the 2262 are the following:
•
AC/DC Power
•
Interface Connectors
•
Alarm Relay Connectors
•
E1 Impedance Switch
•
Loopback Switch (front panel)
Figure 2-1 shows the rear panel configurations available for T1 applications.
Figure 2-2 shows the rear panel configurations available for E1 applications.