Yamaha O2R96 Service Manual page 143

5. Measuring jitter
Condition: Use System Two.
Select Sec, PK
BW: Select 700Hz~100kHz.
Check at the [2TR DIGITAL OUT1]
terminal.
5-1. WORD CLOCK INT
Condition: For WORD CLOCK, select as follows:
q
Jitter
WORD CLOCK
INT 44.1kHz
INT 48kHz
INT 88.2kHz
INT 96kHz
5-2. WORD CLOCK EXT
Condition: Select as follows for WORD CLOCK.
When checking the [WORD CLOCK
IN] terminal: WC IN
When checking the [2TR DIGITAL
IN 1] terminal: 2TR D1
When checking the [2TR DIGITAL
IN 2] terminal: 2TR D2
When checking the [2TR DIGITAL
IN 3] terminal: 2TR D3
When checking the [WORD CLOCK IN]
terminal, select the values in the
following table for the frequency setting
of the oscillator.
When checking the [2TR DIGITAL IN
1,2,3] terminals, select the values in the
following table for the frequency setting
of the System Two (Sample Rate).
q
Jitter (WORD CLOCK IN, 2TR DIGITAL IN 1,2,3
common)
WORD CLOCK
44.1kHz
48kHz
88.2kHz
96kHz
6. Sound check
Check the following items with the sense of hearing.
ANALOG INPUT, ANALOG OUTPUT
Check at the [STEREO OUT L/R] terminal (XLR)
of CH1 (XLR), CH12 (XLR), CH24 (PHONE).
Permissible range
5nsec. or below
5nsec. or below
5nsec. or below
5nsec. or below
Permissible range
10nsec. or below
10nsec. or below
10nsec. or below
10nsec. or below
2TR DIGITAL IN 1,2,3
Condition: Set WORD CLOCK INT to 96kHz.
Check at the [STEREO OUT L/R]
terminal (XLR).
Set the frequency setting of System
Two (Sample Rate) to 44.1kHz.
Turn ON SRC of CH to be measured.
EEFFECT function (DSP6 operation verification)
Condition: [Sound emission scene data]:
[02_MDR_02] file for verifying the
EFFECT function.
WORD CLOCK: INT 96kHz
Input the music signals from the
[ANALOG INPUT] terminal's CH1,
recall in order from scene 1 to scene 4,
and then adjust the [GAIN] knob so that
the stereo meter's [OVER] indicator
does not become illuminated for any of
the scenes.
Inspection: Recall scene 1 (REVERB) and verify
the signals with the headphones for at
least 15 seconds.
Decision standard #1: Check to ensure that the
EFFECT sounds are emitted.
Decision standard #2: Check to ensure that there
is no noise included.
Recall the following scenes from 2 to 16 in the same
way for inspection purposes.
The EFFECT functions for scene 2 to scene 16
are as follows:
Scene 2: SYMPHONIC
Scene 3: HQ PITCH
Scene 4: DYNAMIC FILTER
Scene 5: REVERB
Scene 6: SYMPHONIC
Scene 7: HQ PITCH
Scene 8: DYNAMIC FILTER
Scene 9: REVERB
Scene 10: SYMPHONIC
Scene 11: HQ PITCH
Scene 12: DYNAMIC FILTER
Scene 13: REVERB
Scene 14: SYMPHONIC
Scene 15: HQ PITCH
Scene 16: DYNAMIC FILTER
02R96
143