cxa1734s Sony Electronics, cxa1734s Datasheet - Page 15

• Manufacturer Part Number: cxa1734s
• Description: Us Audio Multiplexing Decoder
• Manufacturer: Sony Electronics

Adjustment Method
1
2
3
4
ATT adjustment
1. TEST BIT is set to “TEST1 = 0” and “TEST-DA = 0”.
2. Input a 100 Hz, 245 mVrms sine wave signal to COMPIN and monitor the LOUT output level. Then,
3. Adjustment range:
Stereo VCO adjustment
1. TEST BIT is set to “TEST1 = 0” and “TEST-DA = 1”.
2. Monitor the ROUT output (4 f
3. Adjustment range:
SAPVCO adjustment
1. TEST BIT is set to “TEST1 = 0” and “TEST-DA = 0”.
2. Input a 5f
3. Adjustment range:
Stereo block dbx filter adjustment
1. TEST BIT is set to “TEST1 = 1” and “TEST-DA = 0”.
2. Input a 9.4 kHz, 600 mVrms sine wave signal to COMPIN. While monitoring the STATUS FLAG
3. Adjustment range:
adjust the “ATT” data for ATT adjustment so that LOUT output goes to the standard value.
Adjustment bits:
data so that this frequency is as close to 4f
Adjustment bits:
STATUS FLAG (STA7, STA8) condition, adjust “SAPVCO” adjustment data.
Adjustment bits:
Align SAPVCO with the center of the STA7 = 0 and STA8 = 1 (adjustment OK) condition range.
(STA3) condition, adjust the “STLPF” adjustment data.
Adjustment bits:
Align STLPF with the center of the STA3 = 1 (adjustment OK) condition range.
1
0
0
H
(SAP carrier , 78.67 kHz) , 147 mVrms sine wave signal to COMPIN. While monitoring the
1
0
1
0
0
±30%
4 bits
±20%
6 bits
±20%
4 bits
±20%
6 bits
H
free run) frequency in a no input state, and adjust “STVCO” adjustment
Adjustment point
Adjustment point
H
—15—
(62.936 kHz) as possible.
F
Measurement data
STA7 "SAPVCO1"
Control data
"SAPVCO"
STA8 "SAPVCO2"
3F
Control data
"STLPF"
Measurement data
STA3 "STLPF"
CXA1734S