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CXD2724AQ-3 Datasheet(PDF) 34 Page - Sony Corporation |
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CXD2724AQ-3 Datasheet(HTML) 34 Page - Sony Corporation |
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34 / 65 page  – 34 – CXD2724AQ-3 (5) Center Mode Control [Relevant data] Coefficients: KP (f5H), KH (f4h), KL (f2H), KR (f3H), KCP (f7H), KCH (f6H) The center channel output mode can be set to Normal, Wide or Phantom mode as shown in Table 8-1-7 below. Coefficient KP (f5H) e000H 0000H e000H KH (f4H) e000H 0000H 0000H KL (f2H) d2cdH d2cdH d2cdH KR (f3H) d2cdH d2cdH d2cdH KCP (f7H) 0000H e000H 0000H KCH (f6H) e000H 0000H 0000H Mode Normal Wide Phantom Table 8-1-7. Center Mode Control Setting Value Examples LP RP CP –KL (f2H) –KR (f3H) LO RO CO LPF HPF –KCH (f6H) –KCP (f7H) Note) If KH is set to 0000H in Phantom center channel mode, the LPF is set to data through status and the data added to the L and R channels is CP × KP. –KH (f4H), –KP (f5H) Fig. 8-1-2. Signal Flow for Center Mode Control (L, R, C-ch) Note) In Phantom center channel mode, the center channel information is divided equally between the left and right speakers. 8000H c000H d2cdH e000H e959H eff6H f7f6H ffffH 0000H D15 to D0 +12.04 +6.02 +3.00 0 –3.00 –6.00 –12.00 –78.27 – ∞ Level [dB] Table 8-1-8. KP, KH, KL, KR, KCP, KCH and KS Setting Value Examples The level of each channel can be adjusted by changing the KP, KH, KL, KR, KCP and KCH setting values. In these cases, be sure to change only the shaded portions for each mode in Table 8-1-7. However, make sure that KP = KH in Normal mode. In Phantom mode, set KH to 0000H and adjust the mix level to the left and right channels using KP. The I/O levels for 8000H to ffffH are obtained by the following formulas. (Coefficient value) = [(–1) × D15 + ∑ (Dn × 2n – 15)] × (–4) I/O level = 20 log [coefficient value] dB 14 n = 0 ∗ In Table 8-1-7, lowering the input level by 3dB using Kia (dcH) or Kis (ddH) raises the output level of the L and R channels by 3dB. In this case, attaching external parts as shown in the Application Circuit is recommended to increase the C and S channel gains. |
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