AK4141 Datasheet, PDF (88/96 Pages) Asahi Kasei Microsystems – NICAM/A2/EIA-J Digital Stereo Decoder

CONFIDENTIAL
[AK4141]
Carrier FM Quality Threshold (dB)= 20*log(ASQTh/8)
Carrier FM Quality
ASQT
Threshold (dB)
(decimal)
-INF
0
(default)
10.2
26
(Recommended)
15
45
20
80
25
142
30
253
Table 105. Table of Typical Carrier FM Quality Threshold Values
Addr
8EH
Register Name
Carrier AM Noise ASD Threshold
R/W
Default
D7 D6 D5 D4 D3 D2 D1 D0
AANT[7:0]
R/W
1111 1111
AANT[7:0]
ASD用キャリアAMノイズスレショルド。8-bitスレショルドはキャリア1の位相ノイズの上位8bit
(CR1P[15:8])と比較されます。AANTの値は以下の数式で定義されます。
AANTh = Fadev / Fs * 2¹²
Fadev = average frequency deviation (in Hz)
Fs = Input sample rate (in Hz), see the Sample Rate Register table for the input sample rate that corresponds to the
selected output sample rate.
Carrier AM Noise Threshold (kHz)
AANT
(for Fs = 18.432MSPS)
(decimal)
0
0
4.5
1
40.5
9
(Recommended)
225
50
450
100
1147.5
255
(default)
Table 106.Typical Carrier AM Noise Threshold Values
MS0952-J-03
- 88 -
2013/12