Table Ak. Options For Fiber-Optic Link Power Levels - AT&T System 85 Installation And Test

TABLE AK. Options for Fiber-Optic Link Power Levels
LIT to LCIT
DISTANCE
FIBER
GRADE
XMTR
POWER
ATTEN-
UATOR
INITIAL
ACTION
IF UNDER-
DRIVEN
INITIAL
ACTION
IF OVER-
DRIVEN
0 - 1000 ft
Switch Switch
0 - 0.19 mi
L Full 10 dB
XMTR XMTR
0 - 0.30 km
to half
power;
to half
power
ATTEN to
5 dB
1000 - Switch
Switch
2800 ft
XMTR
XMTR
0.19 - L
Half 5 dB to full to full
0.53 mi
power
power;
0.30 -
ATTEN to
0.85 km
10 dB
2800 - Switch Switch
4900 ft
XMTR XMTR
0.53 -
L Full 5 dB to half to half
0.93 mi
power; power
0.85 -
ATTEN to
1,49 km
0 dB
4900 -
Switch Switch
7200 ft
XMTR XMTR
0.93 - L Half
0 dB to full to full
1.36 mi power
power;
1.49 -
ATTEN to
2.20 km
5 dB
7200 - Switch Switch
9800 ft
XMTR XMTR
1.36 - N Half
0 dB to full to full
1.86 mi
power power;
2.20 -
ATTEN to
2.99 km
5 dB
9800 -
Switch
13000 ft
XMTR
1.86 - N Full 0 dB
to half
2.46 mi
power
2.99 -
4.00 km
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