參數(shù)資料
型號: CXA1734S
廠商: Sony Corporation
英文描述: US Audio Multiplexing Decoder
中文描述: 美國音頻多路復用解碼器
文件頁數(shù): 17/30頁
文件大?。?/td> 471K
代理商: CXA1734S
—17—
CXA1734S
Description of Operation
The US audio multiplexing system possesses the base band spectrum shown in Fig. 1.
Fig. 1. Base band spectrum
Fig. 2. Overall block diagram (See Fig. 3 for the dbx-TV block)
Fig. 3. dbx-TV block
PEAK DEV
kHz
50
25
25
L+R
50-15kHz
L-R
dbx-TV
NR
50
AM-DSB-SC
SAP
dbx-TV NR
FM 10kHz
50-10kHz
TELEMETRY
FM 3kHz
15
f
H
=15.734kHz
f
H
2f
H
3f
H
4f
H
5f
H
6f
H
6.5f
H
f
5
P
3
29
28
7
8
14
19
11
13
A
B
(COMPIN)
STEREO LPF
PLL
(VCO 8f
H
)
I
2
C BUS
DECODER
MODE
CONTROL
PILOT
DET
MVCA
PILOT
CANCEL
MAIN LPF DE.EM
(MAIN OUT)
L+R
4.7μ
(MAIN IN)
L-R (DSB)
DET
INJ.
LOCK
SUBVCA
SUB LPF
WIDEBAND(SUBOUT) (ST IN)
4.7μ
NR SW
dbx-TV
BLOCK
MATRIX
(L-OUT)
(R-OUT)
MODE
CONTROL
(SAP IN)
4.7μ
SAP(FM)
DET
SAP LPF
SAP
DET
SAP BPF
18
(SAP OUT)
L-R
I
2
C BUS
DECODER
MODE
CONTROL
NOISE
DET
I
2
C BUS
DECODER
2f
HL
f
HL
90°
f
HL
14
19
23
24
A
B
NR SW
FIXED
DEEMPHASIS
VARIABLE
DEEMPHASIS(VE OUT) (VCA IN)
TO
MATRIX
4.7μ
HPF
LPF
LPF
VCA
RMS
DET
RMS
DET
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