CXA1998 SONY [Sony Corporation], CXA1998 Datasheet - Page 17

• Manufacturer Part Number: CXA1998
• Description: Recording/Playback Equalizer Amplifier
• Manufacturer: SONY [Sony Corporation]

1. System control mode
Playback and recording equalizer
(1) Playback equalizer (120µs/70µs)
(4) Recording mute (Pin 14)
ON/OFF control is performed by 11-bit serial data interface D11 (Pin 26). A fader function is achieved using a
time constant circuit formed with the external capacitor and incorporated 20kΩ resistor.
(5) FP CAL (Pin 48)
The standard resistor setting is 27kΩ, but when resistance value is larger, fo (Hz) is lower, and when
resistance value is smaller, fo (Hz) is higher. (fo: high-band peak frequency)
(6) GP CAL (Pin 1)
The standard resistor setting is 27kΩ, but when resistance value is larger, high-band peak gain is larger, and
when resistance value is smaller, high-band peak gain is smaller.
(2) Playback mute (Pin 13)
ON/OFF control is performed by 11-bit serial data interface D7 (Pin 26). A capacitor for setting the switching
time constant is connected.
(3) Recording equalizer (Normal, CrO
DECK-AB
(serial data
D10 (Pin 25))
REC MODE
B-EQ (Pin 3)
Time constant = 20kΩ
H
L
NORMAL (TYPE I)
120µs
(DECK A)
According to B-EQ control
L
L
C
A-EQ (Pin 2)
2
, Metal)
70µs
(DECK A)
H
CrO
2
(TYPE II)
M
– 17 –
120µs
(DECK B)
According to A-EQ control
L
B-EQ (Pin 3)
METAL (TYPE IV)
70µs
(DECK B)
M/H
H
CXA1998AQ