Digital In/Out Inspection - Yamaha DM1000 Service Manual

DM1000/MB1000/SP1000
3-3. OMNI IN 1~4
Parameters Inspect with OMNI OUT 1.
q Distortion ratio (OMNI IN 1~4)
Input frequency Output level
1kHz +22dBu
w Residual noise (OMNI IN 1~4)
Parameter Short the OMNI IN being measured
with 150 Ω.
Permissible range
-82dBu or below
3-4. CH IN 1~16
Parameters Inspect with OMNI OUT 1.
GAIN MIN (CH1~16), PAD ON
(CH1~16).
q Distortion ratio (CH 1~16)
Input frequency Output level
1kHz +22dBu
w Residual noise (CH 1~16)
Parameter Short the CH IN being measured with
150 Ω.
Permissible range
-82dBu or below

4. DIGITAL IN/OUT inspection

4-1. 2TR DIGITAL OUT 1, 2
Parameters Use Parameter System Two.
Must be input from Channel 1.
A. WORD CLOCK INT96kHz
Parameter Set WORD CLOCK INT to 96 kHz.
q Gain (2TR DIGITAL OUT for both 1 and 2)
Input frequency Input level
1kHz +4dBu
w f characteristic (2TR DIGITAL OUT 1)
Parameter The permitted range uses 1 kHz as
reference.
Input frequency Input level
20Hz
40kHz
e Distortion ratio (2TR DIGITAL OUT 1)
Input frequency Output level
1kHz -2dBFS
B. WORD CLOCK INT48kHz
Parameter Set WORD CLOCK INT to 48 kHz.
q Distortion (2TR DIGITAL OUT 1)
Input frequency Output level
1kHz -2dBFS
106
Permissible range
0.01% or below
Permissible range
0.01% or below
Regulated output level Permissible range
-20dBFS -20±2dBFS
Permissible range
+4dBu -1.0~0.5dB
+4dBu -1.5~0.5dB
Permissible range
0.01% or below
Permissible range
0.01% or below
4-2. 2TR DIGITAL IN 1, 2
Parameters Use Parameter System Two.
For distortion measurement, select
BW: 80kHz.
Inspect with OMNI OUT 1 and 2.
Select the WORD CLOCK as follows.
2TR DIGITAL IN 1 inspection:
2TR D1
2TR DIGITAL IN 2 inspection:
2TR D2
A. 96 kHz
Parameters System Two frequency setting
(Sample Rate) to 96 kHz.
Switch 2TR DIGITAL IN SRC Off.
q Gain (2TR DIGITAL IN both 1 and 2)
Input frequency Input level Regulated output level Permissible range
1kHz -20dBFS
w f characteristic (2TR DIGITAL IN 1)
Parameter The permitted range uses 1 kHz as
reference.
Input frequency Input level
20Hz -20dBFS
40kHz -20dBFS
e Distortion ratio (2TR DIGITAL IN 1)
Input frequency Output level
1kHz +22dBu
B. 48 kHz
Parameters System Two frequency setting
(Sample Rate) to 48 kHz.
Switch 2TR DIGITAL IN SRC Off.
q Distortion ratio (2TR DIGITAL IN 1)
Input frequency Output level
1kHz +22dBu
C. SRC operation
Parameters Set WORD CLOCK INT to 96 kHz.
Inspect with 2TR DIGITAL OUT 1.
Set the System Two frequency setting
(Sample Rate) to 44.1 kHz.
Switch the measurement channel
SRC On.
q FS (2TR DIGITAL IN both 1 and 2)
Input frequency Input level Regulated output level Permissible range
1kHz -20dBFS
w Distortion ratio (2TR DIGITAL IN both 1 and 2)
Input frequency Output level
1kHz -20dBFS
+4dBu +4±2dBu
Permissible range
-1.0~0.5dB
-1.5~0.5dB
Permissible range
0.01% or below
Permissible range
0.01% or below
96kHz 96kHz±100Hz
Permissible range
0.005% or below