CXA1910Q
Description of Operation
(1) Signal route
Dolby level
(–6dBm)
LINEOUT
(–30dBm)
TAPEIN
PBFB PBTC
PBOUT
Op1
Op2
4dB
NR
20dB
20dB
NR ON
NR OFF
PBIN
F
R
Fig. 1
Op1 and Op2 are operational amplifiers.
Op1 compose the playback equalizer by attaching a resistor and a capacitor to PBFB pin, and a capacitor
to PBTC pin.
Op2 is an input selector and a LINEOUT amplifier. The gain of LINEOUT amplifier is 24dB.
Reference input level for Dolby is –30dBm.
The adjustment method of playback equalizer is described in the paragraph (3).
(2) Level diagram
P
B
I
T
A
P
E
I
P
B
O
U
T
L
I
N
E
O
U
T
N
N
0dBm
–5
–6dBm
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
Dolby level
–30dBm
–30dBm
VR adjustment
–70dBm (315Hz 160n/Wb/m)
Fig. 2
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SONY [ SONY CORPORATION ]
