13
T1/E1 FIBEROPTIC LINE DRIVER
3.4.3 I
NTERFACE
G
ROUNDING
Both Input and Output can be individually grounded by means of two 2-position
GROUNDED/FLOATING switches (items 2 and 3 in
Figure 3-1
).
3.4.4 R
ANGE
RANGE (item 1 in
Figure 3-1
) selects the optical output power coupled to the
fiber, depending on the fiber core diameter.
Table 3-1
summarizes the optional
output power available at the transmitter as a function of the wavelength and the
type of fiber used.
Figure 3-1. Location of Switches and Jumpers.
FLOATING
GROUNDED
INPUT
2
FLOATING
GROUNDED
OUTPUT
3
SHORT
LONG
RANGE
1
ON
OFF
OPTICAL
AIS XMT
5
6
NC
100 Ohm
BAL
T1
INTERFACE
4
120 Ohm
BAL
E1
75 Ohm
UNBAL
E1
CEPT (E1)
