Inter-Relay Communications; Environmental - GE L60 Instruction Manual

Line phase comparison system, ur series
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2 PRODUCT DESCRIPTION
SHIELDED TWISTED-PAIR INTERFACE OPTIONS
INTERFACE TYPE
TYPICAL DISTANCE
RS422
1200 m
G.703
100 m
RS422 distance is based on transmitter power and
does not take into consideration the clock source
NOTE
provided by the user.
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 manu-
facturer's worst-case transmitter power and worst
NOTE
case receiver sensitivity.
The power budgets for the 1300nm ELED are calcu-
lated from the manufacturer's transmitter power and
NOTE
receiver sensitivity at ambient temperature. At
extreme temperatures these values will deviate
based on component tolerance. On average, the out-
put power will decrease as the temperature 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
AMBIENT TEMPERATURES
Storage temperature:
–40 to 85°C
Operating temperature: –40 to 60°C; the LCD contrast may be
impaired at temperatures less than –
20°C
HUMIDITY
Humidity:
operating up to 95% (non-condensing) at
55°C (as per IEC60068-2-30 variant 1,
6days).
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
L60 Line Phase Comparison System

2.2.9 INTER-RELAY COMMUNICATIONS

TYPICAL LINK DISTANCE
EMITTER TYPE
CABLE
TYPE
820 nm LED,
62.5/125 μm
multimode
50/125 μm
1300 nm LED,
62.5/125 μm
multimode
50/125 μm
1300 nm ELED,
9/125 μm
single mode
1300 nm Laser,
9/125 μm
single mode
1550 nm Laser,
9/125 μm
single-mode
Typical distances listed are based on the follow-
ing assumptions for system loss. As actual losses
will vary from one installation to another, the dis-
NOTE
tance 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
Altitude:
2000 m (maximum)
Pollution degree:
II
Overvoltage category:
II
Ingress protection:
IP20 front, IP10 back
Noise
0 dB
2.2 SPECIFICATIONS
CONNECTOR
TYPICAL
TYPE
DISTANCE
ST
1.65 km
ST
1.65 km
ST
4 km
ST
4 km
ST
11.4 km
ST
64 km
ST
105 km

2.2.10 ENVIRONMENTAL

2-19
2

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