Rev AN-2153 REV B
©2016 Finisar Corporation AN-2153 REV B
Page 2 of 6
20-May-2016
Content
The SFF-8636 specifies that the optional equalizer (CTLE) function should be implemented either as fixed
programmable or as (automatic) adaptive.
Finisar’s CTLE mode is fixed programmable, with 1 dB gain.
Adaptive CTLE is not implemented.
SFF-8636 Table 6-22 Page 0h, register 193 bit 3 indicates no support for auto adaptive equalizer (set to 0
for unsupported).
SFF-8636 Table 6-22 Page 0h, register 193, bit 2 indicates Manual (
i.e.
, fixed programmable) equalizer
support (set to 1 for supported).
The magnitude of the transmitter input equalization supported by the transceiver is identified in Page 03h
Byte 224. Here the maximum gain supported is 10dB for fixed programmable mode.
The SFF-8636 Table 6-34 defines the transmitter input equalization in Page 03h bytes 234-235, for the
programmable control of the CTLE gain. Please see table below which describes the function of bytes
234 - 235
