
17
Manual de instrucciones
Transmisor Optico
4. - EJEMPLO CALCULO DEL ENLACE
234788 02
Rx RET IN
PWR
F.O. Transmitter
With Return Path Receiver
ALARM
Tx FWD OUT
SUPPL
Y
OPTICAL POWER
Rx RET
Tx FWD
Rx RET
Tx FWD
RET
ATT
(dB)
0
18
16
14
12
10 8
6
4
2
15V
LASER APERTURE
Invisible laser radiation
Do not watch directly
with optical instruments
Class 1M laser product
234035 00
SPLITTER 1/2
IN
OUT 1
OUT 2
LASER APERTURE
Invisible laser radiation
Do not watch directly
with optical instruments
Class 1M laser product
234787 01
Rx FWD IN
PWR
ALARM
Tx RET OUT
SUPPL
Y
15V
OPTICAL POWER
Rx FWD
Tx RET
Rx FWD
Tx RET
FWD
ATT
(dB)
0
18
16
14
12
10 8
6
4
2
F.O. Receiver
With Return Path Transmitter
LASER APERTURE
Invisible laser radiation
Do not watch directly
with optical instruments
Class 1M laser product
234035 00
SPLITTER 1/2
IN
OUT 1
OUT 2
LASER APERTURE
Invisible laser radiation
Do not watch directly
with optical instruments
Class 1M laser product
Popt = (0,5 x 1) + (2 x 3,6) + 2 + 1 = 10,70 dB
EINn = -147dBm/Hz + 5dB + 1,5 (Popt - 7dB) = -136,45 dBm
EIN = EINn + 10 log BW = -136,45dBm + 10 log(5MHz) = -69,46 dBm = 39,29 dBµV
V
in
min
= 46dB + 39,29dBµV =
85,29 dBµV
V
in
max
= 106dBµV - 10 log(20-1) =
93,21 dBµV
V
out
max
= 108dBµV - 10 log(20-1) =
95,21 dBµV
Long Fibra:
1 Km
Nº rep. 2 salidas:
2
Nº canales Analógicos:
20
Nº Mux Digitales:
6
D (Analog/Digital):
12 dB
C/N out:
46 dB
Vin
Transmisor
Rep. 2S
Rep. 2S
Receptor
Vout
500 m
500 m
Содержание 8674
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