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Si5040
Register 138. TxLosCtrl
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
sqmLosEn
dLosEn[1:0]
Type
R
R/W
R/W
R
Reset settings = 0000 1110
Bit
7:4
3
2:1
0
Name
Reserved
sqmLosEn
dLosEn[1:0]
Reserved
Function
Read returns zero.
Signal Quality Monitor LOS Enable.
0 = Disabled.
1 = Signal Quality Monitor alarm causes an LOS alarm.
Digital LOS Enable Mode.
00 = Disabled.
01 = Digital LOS alarm is based on the consecutive number of zeros programmed in
Register 145.
10 = Digital LOS alarm is based on the consecutive number of either zeros or ones pro-
grammed in Register 145.
11 = Digital LOS alarm is based on the consecutive number of either zeros or ones pro-
grammed in Register 145.
Read returns zero.
Register 139. TxLosStatus
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
sqmLOS
dLOSlastTrigger
dLOS
LOS
Type
R
R
R
R
R
R
R
R
Reset settings = 0000 0000
Bit
7:5
4
Name
Reserved
sqmLOS
Function
Read returns zero.
Signal Quality Monitor LOS.
When the internal signal quality monitor (Reg153) is less than the threshold in registers
154 and 155, this bit will be high. If a LOL (Reg137[4]) is high, this bit is forced to a 0.
3
dLOSlastTrigger Digital Loss of Signal Last Trigger.
Holds a zero or one depending on which bit caused the last digital LOS event.
2
1
0
dLOS
Reserved
LOS
Digital Loss of Signal.
Digital LOS event status bit.
Read returns zero.
Loss of Signal.
LOS status bit.
Rev. 1.3
83
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