Yamaha DM 1000, Service Manual

Page: 106 / 307

DM1000/MB1000/SP1000
106
3-3. OMNI IN 1~4
Parameters Inspect with OMNI OUT 1.
q
Distortion ratio (OMNI IN 1~4)
w
Residual noise (OMNI IN 1~4)
Parameter Short the OMNI IN being measured
with 150
Ω
.
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)
w
Residual noise (CH 1~16)
Parameter Short the CH IN being measured with
150
Ω
.
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)
w
f characteristic (2TR DIGITAL OUT 1)
Parameter The permitted range uses 1 kHz as
reference.
e
Distortion ratio (2TR DIGITAL OUT 1)
B. WORD CLOCK INT48kHz
Parameter Set WORD CLOCK INT to 48 kHz.
q
Distortion (2TR DIGITAL OUT 1)
Input frequency Output level Permissible range
1kHz +22dBu 0.01% or below
Permissible range
-82dBu or below
Input frequency Output level Permissible range
1kHz +22dBu 0.01% or below
Permissible range
-82dBu 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)
w
f characteristic (2TR DIGITAL IN 1)
Parameter The permitted range uses 1 kHz as
reference.
e
Distortion ratio (2TR DIGITAL IN 1)
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)
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)
w
Distortion ratio (2TR DIGITAL IN both 1 and 2)
Input frequency Input level Regulated output level Permissible range
1kHz +4dBu -20dBFS -20
±
2dBFS
Input frequency Input level Permissible range
20Hz +4dBu -1.0~0.5dB
40kHz +4dBu -1.5~0.5dB
Input frequency Output level Permissible range
1kHz -2dBFS 0.01% or below
Input frequency Output level Permissible range
1kHz -2dBFS 0.01% or below
Input frequency Input level Regulated output level Permissible range
1kHz -20dBFS +4dBu +4
±
2dBu
Input frequency Input level Permissible range
20Hz -20dBFS -1.0~0.5dB
40kHz -20dBFS -1.5~0.5dB
Input frequency Output level Permissible range
1kHz +22dBu 0.01% or below
Input frequency Output level Permissible range
1kHz +22dBu 0.01% or below
Input frequency Input level Regulated output level Permissible range
1kHz -20dBFS 96kHz 96kHz
±
100Hz
Input frequency Output level Permissible range
1kHz -20dBFS 0.005% or below