參數(shù)資料
型號(hào)： MT312T-Y
廠商： Marktech Optoelectronics
英文描述： 2x4mm Rectangular LED Lamps
中文描述： 2x4mm矩形發(fā)光二極管
文件頁數(shù)： 68/90頁
文件大小： 318K
代理商： MT312T-Y
MT312
Secondary Registers for Test and De-Bugging
68
10.2.28 Sweep PAR. Register 78 (R/W)
B7-6:
SW LIM SC[1:0]
Frequency sweep limit scale.
B5-3:
TS NR SWEEP[2:0]
B2-0:
CS NR SWEEP[2:0]
10.2.29 Start up Time. Register 79 (R/W)
STARTUP INTERVAL[7:0]
10.2.30 Loss Lock Threshold. Register 80 (R/W)
B7-4:
LOSSLOCK TH SPUR[3:0]
B3-0:
LOSSLOCK TH SW[3:0]
10.2.31 FEC Lock Time. Register 81 (R/W)
FEC LOCK TM (81).
Default value
32 dec.
20 hex.
FEC LOCK TM[7:0]
The number of symbol periods which the QPSK allows for the FEC to lock after achieving carrier and timing
synchronisation is given by :
FEC LOCK TM * Search factor * 65536
The parameter Search Factor is 1 if there is no code rate search and is 8 if there is a code rate search, i.e. the
QPSK allows more time for the FEC to lock in the presence of a code rate search.
If the FEC does not lock within the allotted number of symbol periods, then the QPSK resets the timing and
carrier loops and resumes the search for a QPSK signal.
NAME
ADR
B7
B6
B5
B4
B3
B2
B1
B0
Def
hex
SWEEP PAR
78
SW LIM
SC [1:0]
TS NR SWEEP[2:0]
CS NR SWEE{[2:0]
R/W
49
NAME
ADR
B7
B6
B5
B4
B3
B2
B1
B0
Def
hex
STARTUP TIME
79
STARTUP INTERVAL[7:0]
R/W
30
NAME
ADR
B7
B6
B5
B4
B3
B2
B1
B0
Def
hex
LOSSLOCK TH
80
LOSSLOCK TH SPUR[3:0]
LOSSLOCK TH SW[3:0]
R/W
21
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