參數(shù)資料
型號: AK4140VF
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: Digital BTSC Decoder
中文描述: 數(shù)字BTSC解碼器
文件頁數(shù): 19/43頁
文件大?。?/td> 538K
代理商: AK4140VF
ASAHI KASEI
[AK4140]
NOISE bit: Noise Detection
noise signal
Detected
Not detected
NOISE bit
1
0
Table 7. Noise Detection
0
1 :
Noise Level
Noise Threshold Level (NTHR1,0 bit)
+ Noise Hysteresis Level (NHYS1,0 bit) / 2 (in dB)
1
0 :
Noise Level
<
Noise Threshold Level (NTHR1,0 bit)
- Noise Hysteresis Level (NHYS1,0 bit) / 2 (in dB)
Input Level (Pilot/SAP/Noise) [dB]
O
Hysteresis Level
(Controlled by PHYS1-0,
SHYS1-0, NHYS1-0 bits)
Threshold Level
(Controlled by PTHR1-0,
STHR1-0, NTHR1-0 bits)
1
0
Figure 11. Pilot, SAP, Noise Detection Function
Pilot/SAP/Noise Detection Threshold Control
PTHR1 bit
0
0
1
1
PTHR0 bit
0
1
0
1
Threshold Level (typ)
-1.5dB
-3dB
-6dB (default)
-9dB
0dB= full scale of 1fH Pilot tone
Table 8. Pilot(fH) Threshold Level Control
MS0547-E-01
2007/03
- 19 -
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