21. This value is measured during the transition from low to high levels
of input optical power. At Signal Detect Deassert, the receiver outputs
Data Out and Data Out Bar go to steady PECL levels High and Low
respectively.
22. The Signal Detect output shall be asserted within 100 µs after a
step increase of the Input Optical Power. The step will be from a
low Input Optical Power, -45 dBm, into the range between greater
than P
A
, and -14 dBm. The BER of the receiver output will be 10
-2
or better during the time, LS_Max (15 µs) after Signal Detect has
been asserted. See Figure 14 for more information.
23. This value is measured during the transition from high to low levels
of input optical power. The maximum value will occur when the input
optical power is either -45 dBm average or when the input optical
power yields a BER of 10
-2
or larger, whichever power is higher.
24. Signal detect output shall be de-asserted within 350 µs af-
ter a step decrease in the Input Optical Power from a level
which is the lower of; -31 dBm or P
D
+ 4 dB (P
D
is the power
level at which signal detect was deasserted), to a power level of
-45 dBm or less. This step decrease will have occurred in less than
8 ns. The receiver output will have a BER of 10
-2
or better for a
period of 12 µs or until signal detect is deasserted. The input data
stream is the Quiet Line State. Also, signal detect will be deasserted
within a maximum of 350 µs after the BER of the receiver output
degrades above 10
-2
for an input optical data stream that decays
with a negative ramp function instead of a step function. See Figure
14 for more information. At Signal Detect Deassert, the receiver
outputs Data Out and Data Out Bar go to steady PECL levels High
and Low respectively.
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Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Limited. All rights reserved. Obsoletes 5989-3084EN
AV02-0031EN - July 5, 2007
