For short fiber distance applications use optical attenuators
4 Be sure the optical output power is not more than (-7dbm)
4. Insert the connector into the receptacle of the SC/APC adapter.
5. If the difference of two values is obvious, clean the end of the connector with a
lint free tissue moistened with 99.99% alcohol.
6. Power on, the Power Indicating Lamp lit red when the power is normal.
Otherwise, turn off the power immediately (and so on in the abnormal power in the
future), and contact with supplier.
This machine should be safely ground.
Link testing conditions
The performance parameters of this manual according to the measuring method
of GY/T 194-2003 < Specifications and methods of measurement on optical node
used in CATV systems >, and tested in the following conditions.
Test conditions:
1. Forward optical receive part: with
10km
standard optical fiber, passive optical
attenuator and standard optical transmitter composed the testing link. Set
59
analog TV channel signal at range of
45/87MHz
～
550MHz
under the specified
link loss. Transmit digital modulation signal at range of
550MHz
～
862/1003MHz
,
the digital modulation signal level (in
8 MHz
bandwidth) is
10dB
lower than analog
signal carrier level. When the input optical power of optical receiver is
-2dBm
, the
RF output level is
108dBμV
, with
9dB
output tilt, measure the
C/CTB
,
C/CSO
and
C/N
.
Chart
“Optical Input Power vs Voltage vs Output
O.Input Power
(mW/dBm)
Voltage
(V)
Output Level (dBµV)
Standard
Maximum
2.00/3.0
4.00
102
104
1.58/2.0
3.16
100
102
1.26/1.0
2.52
98
100
1.00/0.0
2.00
96
98
0.79/-1.0
1.58
94
96
0.63/-2.0
1.26
92
94
0.50/-3.0
1.00
90
92
0.40/-4.0
0.80
88
90
0.32/-5.0
0.64
86
88
0.25/-6.0
0.50
84
86
