Yamaha DM 1000, Руководство по обслуживанию

Страница: 107 / 307

107
DM1000/MB1000/SP1000
4-3. WORD CLOCK IN, 2TR DIGITAL IN 1 and 2 PLL
operation range
Parameters
Use Parameter System Two.
For distortion measurement, select
BW: 80kHz.
Inspect with OMNI OUT 1 and 2.
Select the WORD CLOCK as follows.
WORD CLOCK IN inspection:
WC IN
2TR DIGITAL IN 1 inspection:
2TR D1
2TR DIGITAL IN 2 inspection:
2TR D2
Input from CH1.
A. 96 kHz + 6 % (101.76 kHz)
Parameter For WORD CLOCK IN inspection, set
the oscillator frequency setting to 96
kHz + 6%. For 2TR DIGITAL IN 1 or 2
inspection, set the System Two
frequency setting (Sample Rate) to 96
kHz +6%.
q
Distortion ratio (WORD CLOCK IN, 2TR DIGITAL
IN for both 1 and 2)
B. 44.1 kHz - 10 % (39.69 kHz)
Parameter For WORD CLOCK IN inspection, set
the oscillator frequency setting to 44.1
kHz -10 %. For 2TR DIGITAL IN 1 or
2 inspection, set the System Two
frequency setting (Sample Rate) to
44.1 kHz - 10%.
q
Distortion ratio (WORD CLOCK IN, 2TR DIGITAL
IN both 1 and 2)
5. Jitter measurement
Parameters Use Parameter System Two.
Select Sec and PK.
Select BW: 700 Hz to 100 kHz.
Inspect with 2TR DIGITAL OUT 1.
5-1. WORD CLOCK INT
Parameters Select the value of the WORD
CLOCK according to the following
table.
q
Jitter
5-2. WORD CLOCK EXT
Parameters Select the WORD CLOCK as follows.
WORD CLOCK IN inspection:
WC IN
2TR DIGITAL IN 1 inspection:
2TR D1
2TR DIGITAL IN 2 inspection:
2TR D2
For WORD CLOCK IN inspection,
select the value of the frequency
setting according to the table below.
For 2TR DIGITAL IN 1 or 2 inspection,
set the System Two frequency setting
(Sample Rate) ccording to the table
below.
q
Jitter (WORD CLOCK IN, 2TR DIGITAL IN both
1 and 2)
6. DIssuing sound
Check the following items by listening.
ANALOG INPUT, ANALOG OUTPUT
Parameters CH1, CH9, CH16
→
Inspect with
OMNI OUT 1 and 2.
WORD CLOCK setting INT96kHz and
EXT100kHz (WC IN).
2TR DIGITAL IN 1, 2
Parameters Set WORD CLOCK INT to 96 kHz.
Inspect with OMNI OUT 1 and 2.
Set the System Two frequency setting
(Sample Rate) to 44.1kHz.
Switch the measurement channel
SRC On.
EFFECT function (DSP6 operation check)
Parameters
“Sound scene data”: Use the file
name “LARK_01”.
WORD CLOCK : INT96kHz
Input the music signal from ANALOG
INPUT CH1, recall scenes in order
from Scene 1 to Scene 4, and adjust
the [GAIN] knob so that the STEREO
METER OVER does not light up for
any scene.
Inspection: Recall Scene 1 (REVERB) and check
the signal with the headphones for at
least 15 seconds.
Input frequency Output level Permissible range
1kHz +22dBu 0.01% or below
Input frequency Output level Permissible range
1kHz +22dBu 0.01% or below
WORD CLOCK Permissible range
44.1kHz 10nsec or below
48kHz 10nsec or below
88.2kHz 10nsec or below
96kHz 10nsec or below
WORD CLOCK Permissible range
INT 44.1kHz 5nsec or below
INT 48kHz 5nsec or below
INT 88.2kHz 5nsec or below
INT 96kHz 5nsec or below