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參數(shù)資料
| 型號： | HFBR2462TB |
| 英文描述： | Low Cost, Miniature Fiber Optic Components with ST, SMA, SC and FC Ports |
| 中文描述： | 低成本，微型光纖器件與ST，形狀記憶合金，SC和FC端口 |
| 文件頁數(shù)： | 11/31頁 |
| 文件大?。?/td> | 657K |
| 代理商： | HFBR2462TB |
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56
5 MBd Logic Link Design
If resistor R
1
in Figure 2 is
70.4
, a forward current I
F
of
48 mA is applied to the HFBR-
14X4 LED transmitter. With I
F
=
48 mA the HFBR-14X4/24X2
logic link is guaranteed to work
with 62.5/125
μ
m fiber optic
cable over the entire range of 0
to 1750 meters at a data rate of
dc to 5 MBd, with arbitrary data
format and pulse width distortion
typically less than 25%. By
setting R
1
= 115
, the transmit-
ter can be driven with I
F
= 30 mA,
if it is desired to economize on
power or achieve lower pulse
distortion.
The following example will illus-
trate the technique for selecting
the appropriate value of I
F
and R
1
.
Maximum distance required
= 400 meters. From Figure 3 the
drive current should be 15 mA.
From the transmitter data
V
F
= 1.5 V (max.) at I
F
= 15 mA
as shown in Figure 9.
CC
- V
F
I
F
5 V - 1.5 V
15 mA
R
1
=V
R
1
= 233
The curves in Figures 3, 4, and 5
are constructed assuming no in-
line splice or any additional
system loss. Should the link
consists of any in-line splices,
these curves can still be used to
calculate link limits provided they
are shifted by the additional
system loss expressed in dB. For
example, Figure 3 indicates that
with 48 mA of transmitter drive
current, a 1.75 km link distance
is achievable with 62.5/125
μ
m
fiber which has a maximum
attenuation of 4 dB/km. With
2 dB of additional system loss, a
1.25 km link distance is still
achievable.
Figure 2. Typical Circuit Configuration.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| HFBR2464C | 制造商:AGILENT 制造商全稱:AGILENT 功能描述:Low Cost, Miniature Fiber Optic Components with ST, SMA, SC and FC Ports |
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| HFBR2464M | 制造商:AGILENT 制造商全稱:AGILENT 功能描述:Low Cost, Miniature Fiber Optic Components with ST, SMA, SC and FC Ports |
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