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AK4141 Datasheet, PDF (90/96 Pages) Asahi Kasei Microsystems – NICAM/A2/EIA-J Digital Stereo Decoder | |||
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CONFIDENTIAL
[AK4141]
Addr
92H
Register Name
Carrier FM Quality SCS Threshold
R/W
Default
D7 D6 D5 D4 D3 D2 D1 D0
SQLT[7:0]
R/W
00000000
SQLT[7:0]
ã¹ãã¬ãªãã£ãªã¢ãµã¼ãç¨ãã£ãªã¢FMå質ã¹ã¬ã·ã§ã«ããã¹ãã¬ãªãã£ãªã¢ãµã¼ãæ©è½ã§ãã£ãªã¢2ã®
å質ã決å®ããããã«ä½¿ããã¾ãã8-bitã¹ã¬ã·ã§ã«ãã¯ä¸ä½ã« â0âãæ¡å¼µããã£ãªã¢2ã®FMå質ã®ä¸ä½
13bit (CR2Q[15:3], CR2Q[15:3])ã¨æ¯è¼ããã¾ã(Figure 30, Table 108)ã
Signal
CR2Q[15:3]
Reference
00000 SQLT[7:0]
Signal ⥠Reference
Compare
Carrier2Quality Good
Figure 30. Carrier 2 Quality Threshold
Carrier FM Quality Threshold (dB)= 20*log(SQlTh/8)
Carrier FM Quality
SQLT
Threshold (dB)
(decimal)
-INF
0
(default)
6
16
10.2
26
15
45
20
80
25
142
30
253
Table 108.Typical Carrier FM Quality Threshold Values
MS0952-J-03
- 90 -
2013/12
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