CXA1797 SONY [Sony Corporation], CXA1797 Datasheet - Page 23

• Manufacturer Part Number: CXA1797
• Description: Dolby B-C Type Noise Reduction System with Recording Equalizer Amplifier
• Manufacturer: SONY [Sony Corporation]

4. Control pin usage
1) REC VOL
2) REC BAL
3) REC CAL
4) FQ CAL
5) GH CAL
Connect a 50 kΩ variable resistor to this pin; this pin controls the electronic volume according to the
voltage (between DV
(Although other resistances and voltages can be used, the gain when the volume is at the center will
differ.)
This pin controls the electronic volume balance.
(Both channel sounds are output when voltage of (DV
open. When DV
applied, only the CH2 sound is output.)
This pin adjusts the overall gain for the recording equalizer amplifier. (The gain is at the center when
voltage of (DV
This pin adjusts the high-frequency peak Q value for the recording equalizer amplifier. (FP and GP also
change.)
(The value is at the center when voltage of (DV
This pin adjusts the middle/high frequency gain for the recording equalizer amplifier.
(The gain is at the center when voltage of (DV
CC
Low-frequency boost (external)
CC
+ DGND)/2 is applied to this pin or when it is open.)
voltage is applied, only the CH1 sound is output, and when DGND voltage is
CC
and DGND) applied to this pin.
Frequency (Hz)
GH
—23—
CC
CC
+ DGND)/2 is applied to this pin or when it is open.)
+ DGND)/2 is applied to this pin or when it is open.)
GP/FP
FQ
CC
+ DGND)/2 is applied to this pin or when it is
RECCAL
CXA1797Q