AFBR-776BZ Datasheet, PDF (44/48 Pages) AVAGO TECHNOLOGIES LIMITED – Twelve-Channel Transmitter and Receiver Pluggable, Parallel-Fiber-Optics Modules

254
2
RWv Mask Low Rx Power Alarm Channel 2: Writing 1 Prevents IntL generation, Default = 0
254
1-0 RWv Reserved
255
7
RWv Mask High Rx Power Alarm Channel 1: Writing 1 Prevents IntL generation, Default = 0
255
6
RWv Mask Low Rx Power Alarm Channel 1: Writing 1 Prevents IntL generation, Default = 0
255
5-4 RWv Reserved
255
3
RWv Mask High Rx Power Alarm Channel 0: Writing 1 Prevents IntL generation, Default = 0
255
2
RWv Mask Low Rx Power Alarm Channel 0: Writing 1 Prevents IntL generation, Default = 0
255
1-0 RWv Reserved
Receiver Output Amplitude Control Code Description
Control registers 228 through 233 permit output signal amplitude selection. Four bit code blocks (either bits 7 through
4 or 3 through 0 where bit 7 or 3 is the msb) are assigned to each channel. Codes 1xxx are reserved. Code 0111 calls for
full scale signal amplitude and code 0000 calls for minimum signal amplitude. See table below.
Code
1xxxb
0111b
0110b
0101b
0100b
0011b
0010b
0001b
0000b
Receiver Output Amplitude – No De-emphasis
Min
Nominal
Max
Units
850
mVpp
760
mVpp
670
mVpp
580
mVpp
490
mVpp
400
mVpp
310
mVpp
220
mVpp
Reference
Reserved
Full Scale
Default setting
Receiver Output De-emphasis Control Code Description
Control registers 234 through 239 permit output de-emphasis selection. Four bit code blocks (either bits 7 through 4 or
3 through 0 where bit 7 or 3 is the msb) are assigned to each channel.
Codes 1xxx are reserved.
Code 0111 calls for full scale, 6 dB, de-emphasis and code 0000 calls for no de-emphasis.
Intermediate code values yield intermediate de-emphasis levels
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