CXA1911 SONY [Sony Corporation], CXA1911 Datasheet - Page 14

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CXA1911

Manufacturer Part Number
CXA1911
Description
Dolby B/C Type Noise Reduction System with Playback Equalizer
Manufacturer
SONY [Sony Corporation]
Datasheet
4. MS (internal detection between tracks) adjustment method
1) MS gain (FF/NOR mode gain) adjustment
2) MS low-band cut-off frequency adjustment
3) MS high-band cut-off frequency adjustment
MS gain is expressed by the following equations.
C2
The external resistors R1 and R2 and external capacitors C1 and C2 should be adjusted to adjust the low-
band cut-off frequency for the MS frequency response.
The external capacitor C3 should be adjusted to adjust the high-band cut-off frequency for the MS
frequency response. (In this case, G1 and G2 have the same cut-off frequency.)
G1 = 10 + 20log
TAPEIN
R1 + 100k
10dB
R1
(in the case of built-in only)
MSLPF
C3
3
[dB]
25kHz LPF
100k
G1
64pF
G2
2
2
2
G1
R1
C1
1
External resistors R1 and R2
External resistors R1 and R2 and external capacitors C1 and
External capacitor C3
G2 = 10 + 20log
—14—
3
G2
R2
C2
100k
1
1
1
2
R2 + 100k
MSTC
R2
DET
[dB]
MSOUT
CXA1911Q

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