afbr-820bz Avago Technologies, afbr-820bz Datasheet - Page 44

• Manufacturer Part Number: afbr-820bz
• Description: Twelve-channel Transmitter And Receiver Pluggable, Parallel-fiber-optic Modules
• Manufacturer: Avago Technologies

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.
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.
44
Code
1xxxb
0111b
0110b
0101b
0100b
0011b
0010b
0001b
0000b
Receiver Output Amplitude – No De-emphasis
Min
Nominal
850
760
670
580
490
400
310
220
Max
Units
mVpp
mVpp
mVpp
mVpp
mVpp
mVpp
mVpp
mVpp
Reference
Reserved
Full Scale
Default setting