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TECHNICAL SPECIFICATION
AUDIO SIGNAL PROCESSING
Micro Hi-Fi System with PLL Tuner ,USB, CD-MP3, 10W/ TWO channel Universal Class D Power Amplifier
1 )
DSC ( Digital Sound Control )
Input sinewave 500mV at 1kHz to R/L channel of MP3 Link socket
Set DSC to Flat mode
Adjust volume to obtain 500mW across 6 ohm load at R/L speaker ouput
The 500mW will be used as 0dB reference
Tabel 1a ( Tolerance ± 3dB )
Frequency
100HZ
10KHZ
2 )
DBB ( Dynamic Bass Boot )
Play CD testing signal of 1KHZ
Set DSC to OFF mode and switch off DBB
Adjust volume level will be as "18"
Tabel 2 ( Tolerance ± 3dB )
Frequency
TECHNIAL DESCRIPTION
USB
See also SH 190 USB Audio Module (300605)
Measurment are directly done at the coonector on the board
GENERAL PART
Measurement are directly done at the connector on CDC board
Description
Output Resistance
Output Voltage RL = 33 k ohm ( )dB, 1 Khz )
Channel Unbalance
THD + Noise ( 0dB, 1Khz )
Channel Crosstalk ( 100Hz - 16,000 Hz )
( 0 dB, 1 KHz )
Signal to Noise Ratio ( 0dB,1kHz )
( 100 - 16,000 Hz )
Frequency Response ( 5dB+/- 3dB ), reference 1kHz
1-3
DSC Modes with DBB Off VOL=20
DSC ON
DSC OFF
DBB OFF
DBB ON
Specification
< = 1.5 kOhm
830mVrms +/- 1.5dB
< = +/- 3 dB
<= 0.3 5
>= 35 dB
>= 40 dB
>= 60dBA ( A - weighted )
>= 55dBA ( A - weighted )
100Hz - 16kHz
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