CXA2094 데이터 시트보기 (PDF) - Sony Semiconductor

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CXA2094

US Audio Multiplexing Decoder

Sony Semiconductor 

CXA2094Q

Adjustment Method (Input signal level is the case when standard input signal is 245mVrms)

1. ATT adjustment

1) TEST BIT is set to “TEST1 = 0” and “TEST-DA = 0”.

2) Input a 100Hz, 245mVrms sine wave signal to COMPIN and monitor the TVOUT-L output level. Then,

adjust the “ATT” data for ATT adjustment so that the TVOUT-L output goes to the standard value

(490mVrms).

3) Adjustment range: ±30%

Adjustment bits: 4 bits

2. Separation adjustment

1) TEST BIT is set to “TEST1 = 0” and “TEST-DA = 0”.

2) Set the unit to stereo mode and input the left channel only signal (modulation factor 30%, frequency 300Hz

NR-ON) to COMPIN. At this time, adjust the “WIDEBAND” adjustment data to reduce TVOUT-R output

to the minimum.

3) Next, set the frequency only of the input signal to 3kHz and adjust the “SPECTRAL” adjustment data to

reduce TVOUT-R output to the minimum.

4) The adjustments in 2 and 3 above are performed to optimize the separation.

5) “WIDEBAND”

“SPECTRAL”

Adjustment range: ±30% Adjustment range: ±15%

Adjustment bits: 6 bits Adjustment bits: 6 bits

∗ Adjust this through Tuner and IF when this IC is mounted on the set.

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