Yamaha AV-S70 Service Manual page 11

DSP FULL BIT
The main L/R is input through AC3D2av to DSP and then output through all
channels. The head margin is eliminated and the digital data is output in digital full
bit. The same applies as "YSS908" except that the digital data is output in full bit
at D/A.
AUX IN : – 20dBV, Both ch
VOLUME : MAX
CN102 (Page 30, C-4)
MAIN L (1kHz) : – 11dBV
MAIN R (1kHz) : – 11dBV
LFE (30Hz) : – 13dBV
REAR L (1kHz) : – 17dBV
REAR R (1kHz) : – 17dBV
3. AC-3 Through
Only the signal of the digital system is input. The AC3 signal is decoded and reproduced according to
the input source.
The AC-3 signal in each channel is AC-3 decoded and output through AC3D2av.
The combined status information of the sampling frequency and the number of chan-
nels of the AC3 signal appears on the Fl display.
CODEC.AD
ANALOG IN
CS4227
DIR2
DIGITAL IN
YM3436
Status information
AC3 44.1k 2/0
Sampling frequency
As signal identification is executed in normal AC-3 reproduction, the source (DAT, CD-ROM, etc) without digital
data bit of IEC958 cannot be reproduced even when it is AC-3 encoded. On the other hand, as this menu does not
execute such digital data bit identification, these sources can be AC-3 reproduced. (To measure characteristics
during AC-3 reproduction, use the AC-3 decoded sine wave.)
However, note that with the sources that have not been AC-3 encoded, a decode error occurs and muting is
applied. In addition, by displaying the combined status information of the sampling frequency and the number of
channels of the AC-3 signal on the FL display, malfunction of the decoder can be detected.
Full bit: The digital data is normally output with a head margin for each of C and RL/RR
channels. In this menu, no head margin is used and the digital data is output in full bit so as to
obtain the A/D and D/A characteristics fully. Note that this means the analog gain after D/A is
larger as compared to L/R. Also, the LFE channel also outputs the signal in full bit.
AC3Dav(YSS908)
DECODER DSP
L/R
DOLBY DIGITAL
or
C/LFE
PRO LOGIC
LS/RS
256K SRAM
Sampling frequency (Display)
Analog
32kHz
44.1kHz
48kHz
Number of channels
MAIN L
L/R
CODEC.DA
MAIN R
C/LFE CENTER
LFE
LS/RS REAR L
CS4227
REAR R
The shaded square means that the element included in it does not operate.
Number of channels
(Front/Rear)
1+1
Analo
1/0
32k
2/0
44.1k
3/0
48k
2/1
3/1
2/2
3/2 5.1ch
7.1 (DTS)
AV-S70/NX-SW70
(Display)
1+1
1/0
2/0
3/0
2/1
3/1
2/2
3/2
7.1
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