GX4002 Datasheet, PDF (31/74 Pages) Gennum Corporation – Dynamic on-chip power management control

CH1LOSHYS = 0
CH1LOSHYS = 9
CH1LOSHYS = 15
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CH1LOSTHNEG
Figure 3-14: Ch1 LOS Threshold vs. Hysteresis (CH1LOSRANGE = 2)
CH1LOSHYS = 0
CH1LOSHYS = 9
CH1LOSHYS = 15
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0
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CH1LOSTHNEG
Figure 3-15: Ch1 LOS Threshold vs. Hysteresis (CH1LOSRANGE = 3)
3.5.2.2 Ch1 LOS Hysteresis
The LOS detector supports programmable hysteresis ranging from 0dB to 6dB,
adjustable in steps of less than 0.5dB. The following register can be used to program the
hysteresis. Note that the effective hysteresis is somewhat dependent on the threshold
value:
Register Name
CH1_REG13
Register
Address^d
60
Parameter Name
CH1LOSHYS
Bit
Position
Access
3:0
RW
Reset Value^b
1001
Valid
Range^d
Function
0-15
Sets LOS hysteresis from 0dB to 6dB in steps
of 0.5dB.
GX4002 2x2 14.025Gb/s Crosspoint Switch with Trace
Equalization and Output De-Emphasis
Data Sheet
55972 - 0
March 2012
31 of 74
Proprietary & Confidential