Sony STR-DE845 Training Manual page 20

waveforms is the amount of activity in each mode. The first two modes (AFD and 2CH) show very little activity
because no reverberation is necessary and all the processing is being performed in the DSP internal RAM. The
third mode, where any of the Cinema studio and Hall modes can be selected, shows increased activity. Note:
The "Normal Surround" mode does not use reverberation so when in this mode, the waveforms will look like the
Waveforms 4-8 and 4-9. The increased data activity confirms that the DSP and the SRAM are attempting to
produce the selected sound field. This does not confirm that the data is good; further testing is necessary and
will be discussed in a later section.
Data and Control Line Waveforms for IC1402
Oscilloscope Settings:
5V/div
10us/div
Trigger rising edge
DATA
WE
O E
WAVEFORM 4-8
DATA
WE
O E
WAVEFORM 4-9
DATA
WE
O E
WAVEFORM 4-10
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4. Control Signal Block