Adc (Analog To Digital Converter : Qk01 / Cs5394) - Marantz sr-18 u Service Manual

2nd DSP (Digital Signal Processor for THX processing : Q651 / ZR38600)
Q651(ZR38600) has the THX 5.1 processing functions. These functions include Re-equalization, Surround Timbre-Match-
ing, Adaptive Decorrelation, Bass Management, Bass Peak Level Manager, and Loudspeaker Position Time Synchroni-
zation.
Re-equalization takes the edginess or "brightness" out of your home cinema sound, compensating for the fact that sound
mixed for theatres will sound too bright when played back through flat response speakers in your home.
Timbre Matching matches the tone of your front speakers to your surrounds to compensate for the fact that only two surround
speakers are used in a typical Home Theatre system instead of a full array as in a movie theatre.
Adaptive Decorrelation gives a stereo "feel" when your surrounds are playing mono and automatically switches off when they
are playing stereo.
Bass Management Electronic Crossover allows you to use more compact, easier-to-place speakers, while sending bass to a
subwoofer system, improving frequency response, lowering distortion and increasing dynamic range.
Bass Peak Level Manager protects your subwoofer from overloading due to the great amount of bass a 5.1 soundtrack
delivers.
Loudspeaker Position Time Synchronization lets you easily set up your system for an optimum listening position, which is
difficult to achieve within the space constraints of most homes.

ADC (Analog to Digital Converter : QK01 / CS5394)

CS5394 is a complete analog-to-digital converter for stereo digital audio systems. it performs sampling, analog-to-digital con-
version and anti-alias filtering, generating 24 bit values for both left and right inputs in serial form.
DAC (Digital to Analog Converter : QD01, QD02, QD03 : QD41, QD42 / AD1855)
The AD1855 is a high performance, single-chip stereo,audio DAC. There are five AD1855 chips on the board. Four chips are
used for L, R, C, and Sub woofer channel individually. Another chip is used for Surround Left & Right.
CPU (Q691 / µ µ µ µ µ PD78018)
This chip controls some ICs in P604 and communicates with QU01.
Connect to QU01 with serial interface lines.
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