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Data subject to change. Copyright © 2005-2012 Avago Technologies. All rights reserved. Obsoletes 5988-8033EN
AV02-3659EN - June 22, 2012
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 after 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 func tion
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.
