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4–4 MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL
OPERATION CHAPTER 4: OPERATION
4.1.5 Power Budget Calculations for ML1200 PM’s with Fiber Media
Receiver Sensitivity and Transmitter Power are the parameters necessary to compute the
power budget. To calculate the power budget of different fiber media installations using
Multilink products, the following equations should be used:
OPB (Optical Power Budget) = P
T
(min) - P
R
(min)
where P
T
= Transmitter Output Power, and P
R
= Receiver Sensitivity
Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss)
Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km]
where the “Cable Loss” for 62.5/125 and 50/125μm (M.m) is 2.8 dB/km,
and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km,
and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km
and the “Cable Loss” for 9/125 (Single-mode) is 0.4 dB/km (LX25)
and the “Cable Loss” for 9/125 (Single-mode) is 0.25 dB/km (ZX40)
and the “Cable Loss” for 9/125 (Single-mode) is 0.2 dB/km (ZX70)
The following data has been collected from component manufacturer’s (Agilent’s and
Lucent’s) web sites and catalogs to provide guidance to network designers and installers.
Fiber Port
Module
Speed, Std. Mode Std. km
fdx
(hdx)
Wavelength
nm
Cable Size/μm X’mitr
Output
P
T
dB
R’cvr
Sens.
P
R
dB
Worst
OPB,
dB
Worst*
distance
Km
fdx
typical
OPB,
dB
typical*
distance
Km
fdx
C7 10Mb
FL
Multi-Mode 2
(2)
850 62.5/125
100/140
50/125
-15.0
-9.5
-19.5
-31
-31
-31
14
19.5
19.5
5
5.9
3.4
17
23.5
13.5
6
7
4.8
C8, C9 100Mb
FX
Multi-mode 2
(0.4)
1300 62.5/125
50/125
-20
-23.5
-31
-31
9.0
5.5
3.0
2.0
14
12
5
4
CA 100Mb
FX
Single-mode18+
(0.4)
1300 9/125 -15 -31 14 28 17.5 35
CB 100Mb
FX
Single-mode40
(0.4)
1300 9/125 -5 -34 29 58 32.5 65
CC 100Mb
FX
Multi-mode 2
(0.4)
1300 62.5/125
50/125
-20
-23.5
-31
-31
9.0
5.5
3.0
2.0
15.8
12.2
5.5
4.0
CD 100Mb
FX
Multi-mode 2
(0.4)
1300 62.5/125 -19 -31 12 4 16 5.7
CE 100Mb
FX
Single-Mode 15+
(0.4)
1310 9/125 -15 -28 11 22 - -
H3, HG 1000 Mb FX
(Gigabit)
Single-Mode 10 1310 9/125 -10.0 -22 10 22 11 24