Download Print this page

Cabletron Systems FR-3000 User Manual page 10

Fiber optic repeater

Advertisement

Into 50/125 m Fiber:-23.5 dBm-26.5 dBm
Into 62.5/125 m Fiber:-18.5 dBm-21.5 dBm
Into 100/140 m Fiber:-15.5 dBm-17.5 dBm
Transmitter Power - High Mode
Into 50/125 m Fiber:-17.5 dBm-20.5 dBm
Into 62.5/125 m Fiber:-12.5 dBm-15.5 dBm
Into 100/140 m Fiber:-9.5 dBm-11.5 dBm
Maximum Fiber Optic Link:3 km (IEEE 802.3 specification allows for a maximum
of 1000 meters of fiber cabling between repeaters. Total network propagation delay must
be calculated before fiber runs can be incorporated in any network design.)
For further information refer to the FOT-1 Fiber Optic Transceiver User Manual.
AUI INTERFACE (PORT 2)
Parameter
Frequency Range:4 to 20 MHz
RX and CP Pair Input
Impedence
Differential:
Common-mode:Greater than 20 ohms
Common-mode Voltage
Range at RX or CP Pair:0 to 30 V
Input Sensitivity at RX or
CP Pair:
Waveform Symmetry
TX Pair:
Output Voltage Into
78 Ohms, TX Pair:900 mV
Interface Connector
Type:
Pin
Typical Value Worst Case
78 ohms
100 mV
0.5 ns
1
Logic Ref.
2
Collision+
3
Transmit+
5 to 15 MHz
76 to 80 ohm
0 to 5 V
75 to 150 mV
1.0 ns
550 mV
15 position D type receptacle
Pin
9
Collision-
10
Transmit -
11
Logic Ref.

Advertisement

loading