參數(shù)資料
型號(hào)： IBM42F21SNNAA10
廠商： IBM Microeletronics
英文描述： 2x Fibre Channel Small Form Factor PTH Transceiver(2x吉位光纖通道小外形PTH收發(fā)器)
中文描述： 2倍光纖通道纖巧甲狀旁腺收發(fā)器（2倍吉位光纖通道小外形甲狀旁腺收發(fā)器）
文件頁(yè)數(shù)： 10/24頁(yè)
文件大?。?/td> 210K
代理商： IBM42F21SNNAA10
IBM42F21SNNAA10
IBM42F21LNNAA10
2x / 1x Fibre Channel Small Form Factor PTH Transceiver
IBM42G21SNNAA10
IBM42G21LNNAA10
Page 10 of 23
08/15/00
Optical Specifications (Short Wavelength)
Receiver Specifications
Symbol
Parameter
Min
Typical
Max.
Unit
Notes
λ
Operating Wavelength
830
860
nm
RL
Return Loss of Receiver
12
dB
OMA
Optical Modulation Amplitude - 2.125Gb/s
49
2000
μ
W (pk-pk)
1, 2
OMA
Optical Modulation Amplitude - 1.0625Gb/s
31
2000
μ
W (pk-pk)
1, 2
P
off
Rx_SD De-Assert (negate) Level
-27.0
-17.5
dBm (avg)
3
P
on
Rx_SD Assert Level
-17.0
dBm (avg)
3
Rx_SD Hysteresis
0.5
2.5
5.0
dB (optical)
3
1. The minimum and maximum values of the average received power in dBm give the input power range to maintain a
BER < 10
-12
when the data is sampled in the center of the receiver eye. These values take into account power penalties caused by
the use of a laser transmitter with a worst-case combination of spectral width, extinction ratio and pulse shape characteristics.
2. Optical Modulation Amplitude (OMA) is defined as the difference in optical power between a logic level one and a logic level zero.
The Optical Modulation Amplitude is defined in terms of average optical power (P
AVG
in
μ
W) and extinction ratio (ER) as given by
OMA=2P
AVG
((ER-1)/(ER+1)). The extinction ratio, defined as the ratio of the average optical power (in
μ
W) in a logic level one to
the average optical power in a logic level zero measured under fully modulated conditions in the presence of worst case reflections,
must be the absolute (unitless linear) ratio and not expressed in dB.The specified Optical Modulation Amplitude at 2.125Gb/s is
equivalent to an average power of -15 dBm at an extinction ratio of 9 dB. At 1.0625Gb/s, the specified OMA is equivalent to an
average power of -17 dBm at an ER of 9 dB.
3. The Rx_SD has hysteresis to minimize “chatter” on the output line. In principle, hysteresis alone does not guarantee chatter-free
operation. The SFF-PTH-2125-SW/LW-2X5/2X6, however, presents an Rx_SD line without chatter, where chatter is defined as a
transient response having a voltage level of greater than 0.5 volts (in the case of going from the negate level to the assert level) and
of any duration that can be sensed by the host logic.
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