Environmental - GE L90 Instruction Manual

2 PRODUCT DESCRIPTION
LINK POWER BUDGET
EMITTER, TRANSMIT
FIBER TYPE POWER
820 nm LED, –20 dBm
Multimode
1300 nm LED, –21 dBm
Multimode
1300 nm ELED, –23 dBm
Singlemode
1300 nm Laser, –1 dBm
Singlemode
1550 nm Laser, +5 dBm
Singlemode
These power budgets are calculated from the
manufacturer's worst-case transmitter power
NOTE
and worst case receiver sensitivity.
The power budgets for the 1300nm ELED are cal-
culated from the manufacturer's transmitter
NOTE
power and receiver sensitivity at ambient temper-
ature. At extreme temperatures these values will
deviate based on component tolerance. On aver-
age, the output power will decrease as the tem-
perature is increased by a factor 1dB / 5°C.
MAXIMUM OPTICAL INPUT POWER
EMITTER, FIBER TYPE
820 nm LED, Multimode
1300 nm LED, Multimode
1300 nm ELED, Singlemode
1300 nm Laser, Singlemode
1550 nm Laser, Singlemode
OPERATING TEMPERATURES
Cold: IEC 60068-2-1, 16 h at –40°C
Dry heat: IEC 60068-2-2, 16 h at +85°C
Storage temperature: –40 to +85°C
UL/CSA/CE safety rating:–40 to +60°C
The LCD contrast may be impaired at temperatures less
than –20°C.
NOTE
GE Multilin
RECEIVED POWER
SENSITIVITY BUDGET
–30 dBm 10 dB
–30 dBm 9 dB
–32 dBm 9 dB
–30 dBm 29 dB
–30 dBm 35 dB
MAX. OPTICAL
INPUT POWER
–7.6 dBm
–11 dBm
–14 dBm
–14 dBm
–14 dBm
L90 Line Current Differential System
TYPICAL LINK DISTANCE
EMITTER TYPE CABLE
TYPE
62.5/125 μm
820 nm LED,
multimode
62.5/125 μm
1300 nm LED,
multimode
9/125 μm
1300 nm ELED,
single mode
9/125 μm
1300 nm Laser,
single mode
9/125 μm
1550 nm Laser,
single-mode
Typical distances listed are based on the fol-
lowing assumptions for system loss. As
NOTE
actual losses will vary from one installation to
another, the distance covered by your system
may vary.
CONNECTOR LOSSES (TOTAL OF BOTH ENDS)
ST connector 2 dB
FIBER LOSSES
820 nm multimode 3 dB/km
1300 nm multimode 1 dB/km
1300 nm singlemode 0.35 dB/km
1550 nm singlemode 0.25 dB/km
Splice losses: One splice every 2 km,
at 0.05 dB loss per splice.
SYSTEM MARGIN
3 dB additional loss added to calculations to compensate for
all other losses.
Compensated difference in transmitting and receiving (channel
asymmetry) channel delays using GPS satellite clock: 10 ms
OTHER
Humidity (non-condensing): IEC 60068-2-30, 95%, Variant 1, 6
days
Altitude: Up to 2000 m
Installation category: II
Pollution degree: 2
2.4 SPECIFICATIONS
CONNECTOR TYPICAL
TYPE DISTANCE
ST 1.65 km
ST 3.8 km
ST 11.4 km
ST 64 km
ST 105 km

2.4.10 ENVIRONMENTAL

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