Inter-Relay Communications - GE B30 Instruction Manual

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 AND MAXIMUM OPTICAL INPUT POWER
The following specifications apply to filter interface modules implemented from January 2012.
EMITTER, FIBER CABLE
TYPE TYPE
820 nm, Multimode 62.5/125 μm
50/125 μm
1300 nm, 62.5/125 μm
Multimode
50/125 μm
1300 nm, Single 9/125 μm
mode
1300 nm Laser, 9/125 μm
Single mode
1550 nm Laser, 9/125 μm
Single mode
The following specifications apply to filter interface modules implemented before January 2012.
EMITTER, FIBER TRANSMIT
TYPE POWER
820 nm LED, –20 dBm
Multimode
1300 nm LED, –21 dBm
Multimode
1300 nm ELED, –23 dBm
Single mode
1300 nm Laser, –1 dBm
Single mode
1550 nm Laser, +5 dBm
Single mode
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 1300 nm ELED are calcu-
lated from the manufacturer's transmitter power and
NOTE
receiver sensitivity at ambient temperature. At
EMITTER TYPE CABLE
TYPE
820 nm LED, 62.5/125 μm
multimode
50/125 μm
GE Multilin
TRANSMIT RECEIVED
POWER SENSITIVITY
-16 dBm -32 dBm
-20 dBm
-16 dBm -32 dBm
-20 dBm
-15 dBm -32 dBm
0 dBm -34 dBm
5 dBm -34 dBm
RECEIVED POWER
SENSITIVITY BUDGET
–30 dBm 10 dB
–30 dBm 9 dB
–32 dBm 9 dB
–30 dBm 29 dB
–30 dBm 35 dB
CONNECTOR TYPICAL DISTANCE
TYPE
BEFORE
JANUARY JANUARY
2012
ST 1.65 km
ST 1.65 km
B30 Bus Differential System

2.4.9 INTER-RELAY COMMUNICATIONS

POWER MAXIMUM
BUDGET OPTICAL
INPUT
POWER
16 dBm -8 dBm
12 dBm
16 dBm -8 dBm
12 dBm
17 dBm -8 dBm
34 dBm -8 dBm
39 dBm -10 dBm
MAX. OPTICAL
INPUT POWER
–7.6 dBm
–11 dBm
–14 dBm
–14 dBm
–14 dBm
extreme temperatures these values deviate based on com-
ponent tolerance. On average, the output power decreases
as the temperature is increased by a factor 1dB / 5°C.
TYPICAL LINK DISTANCE
FROM
2012
2 km
2 km
2.4 SPECIFICATIONS
2
2-25