Yamaha AD8HR Service Manual page 56

AD8HR
3. Test during Word Clock INT48kHz
3-1. INPUT 1 - 8 CH
Conditions: Measure at DIGITAL OUT B (AES/EBU).
q Distortion
Input Frequency Input Level
1kHz
w Noise Level
Condition: INPUT 1 - 8CH shorted with 150Ω.
Corrected at BW:FS/2 on System Two.
GAIN
+10dB -105dBFS or less (-87dBu or lower)
4. PLL operating range for WORD CLOCK IN. DIGITAL OUT A
Conditions: Use System Two.
When measuring distortion, select BW: FS/2.
Test on CH 1 & 2 on DIGITAL OUT A.
Select the WORD CLOCK from the following.
Select WORD CLOCK IN when testing Word Clock IN.
Select DIGITAL OUT A when testing Digital Out A.
Input signal from INPUT 1, 2.
A. 96kHz+6% (101.76kHz)
Conditions: During testing of WORD CLOCK IN, set the oscillator frequency to 96kHz+6%.
During testing of DIGITAL OUT A, set the frequency (Sample Rate) of System Two to 96kHz+6%.
q Distortion (for both WORD CLOCK IN and DIGITAL OUT A)
Input Frequency Input Level
1kHz
B. 44.1kHz-10% (39.69kHz)
Conditions: During testing of WORD CLOCK IN, set the oscillator frequency to 44.1kHz-10%.
During testing of DIGITAL OUT A, set the frequency (Sample Rate) of System Two to 44.1kHz-10%.
q Distortion (for both WORD CLOCK IN and DIGITAL OUT A)
Input Frequency Input Level
1kHz
5. Jitter measurement
Conditions: Use System Two.
Select sec, PK.
Select BW: from 700Hz to 100kHz.
Test on CH 1 & 2 on DIGITAL OUT A.
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GAIN Output Level
+29dBu +10dB -1dBFS (+17dBu)
-43dBu -62dB -1dBFS (+17dBu)
Tolerance Range
GAIN Output Level
+29dBu +10dB
GAIN Output Level
+29dBu +10dB
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Tolerance Range
0.01% or less
0.05% or less
The number in the parentheses ( ) shows the output of DA824.
Tolerance Range
-1dBFS 0.01% or less
Tolerance Range
-1dBFS 0.01% or less
The number in the parentheses ( ) shows
the output of DA824.