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參數(shù)資料
| 型號： | HFBR-4663 |
| 英文描述： | Single Chip 10BASE-FL Transceiver(單芯片10BASE-FL收發(fā)器) |
| 中文描述： | 單片上10BASE -佛羅里達州收發(fā)器（單芯片的10 Base -佛羅里達州收發(fā)器） |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 211K |
| 代理商： | HFBR-4663 |
12
1. SQE Test:
The FOIRL
standard did not include the
option of attaching a fiber
transceiver to a DTE. Adding the
SQE test to 10BASE-FL enables a
10BASE-FL transceiver to attach
to a DTE.
2. 0 to at Least 2 Km Distance:
The FOIRL standard specifies a 1
km distance while 10BASE-FL
specifies 2 km. The additional 1
km distance for 10BASE-FL
comes from an increased flux
budget for the cable of 3.5 dB.
This 3.5 dB increase came from
an increase of 2.5 dB sensitivity
for the receiver and a 1 dB
improvement for the transmitter.
The following table illustrates the
transmit and receive power
requirements for the two
standards. Note: FOIRL specifies
optical power in peak and
10BASE-FL specifies it in
average. Subtracting 3 dB from
peak will give the average. In the
table below the FOIRL
specifications were converted
from peak to average power.
3. MAU State Diagrams are
Different:
The state diagrams for
10BASE-FL are similar to
10BASE-T, while the state
diagrams for FOIRL are slightly
different. The differences are in
the AUI loopback, and in the link
integrity function.
AUI Loopback -
In 10BASE-FL
the DO to DI loopback is always
disabled during a collision, and
optical receive data is passed
through to DI. For FOIRL there
are some cases where loopback
continues (i.e. DO looped to DI)
during a collision, and others
where loopback is disabled
during a collision. 10BASE-FL is
identical to 10BASE-T in this
case. Please refer to the IEEE
standards for greater detail.
Timing
FOIRL
(BIT Times)
10BASEFL
(BIT Times)
Parameter Differences
ORD input to input on DI
Steady State Prop Delay
0.5
2
Start-Up Delay
3.5
5
Output on DO to OTD_output
Steady State Prop Delay
0.5
2
Start-Up Delay
3.5
5
Collision Deassert to
SQE Deassert minimum
4.5
0
OTD - Optical Transmit Data
ORD - Optical Receive Data
DI, DO, CI - AU Interface Signals
Transmit/Receive
Average Power
Min.
Max.
Conditions
FOIRL
Transmitter
-12 dBm
-21 dBm
Receiver
-12 dBm
-30 dBm
BER < 10
-10
10BASE-FL
Transmitter
-12 dBm
-20 dBm
Receiver
-12 dBm
-32.5 dBm
BER < 10
-9
Link Integrity -
10BASE-FL adds
an additional state to the Link
Integrity Test function that will
not allow an exit from the Low
Light State until both the
transmitter and receiver are idle.
In FOIRL, it is possible to exit
from the Low Light State while
still receiving data.
MAU Timing Differences -
The
timing differences between
10BASE-FL and FOIRL relate to
propagation delays, start-up
delays, and collision deassert
delays. The following table
provides the details of these
parameters.
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