Yamaha spx2000 Service Manual page 31

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Supplementary)
After this test, press the UTILITY key again and when
"INPUT SOURCE" appears on the LCD, press the DEC
key. Setting is completed when the asterisk (*) mark
moves to the "ANALOG" position. Press the BACK key
and execute WORD CLOCK selection.
2-6. PLL Operation Range of WORD CLOCK
IN, DIGITAL IN
Condition: Use the System Two.
Signals are inputted through ANALOG INUT L, R
(XLR) and output from OUTPUT L, R (XLR).
The WORD CLOCK should be selected as follows.
When checking WORD CLOCK IN: WORD CLOCK
When checking DIGITAL IN: AES/EBU
a. 96kHz + 6% (101.76kHz)
Condition:
Make frequency setting (Sample Rate) of the System
Two to 96kHz + 6%
[1] Distortion ratio (both WORD CLOCK IN and
DIGITAL IN)
Input frequency
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L 13942296513
1 kHz
b. 44.1kHz - 10% (39.69kHz)
Condition:
Make frequency setting (Sample Rate) of the System
Two to 44.1kHz - 10%
[1] Distortion ratio (both WORD CLOCK IN and
DIGITAL IN)
Input frequency
1 kHz
2-7. Jitter Measurement
Condition: User the System Two.
Select Sec and PK.
Select BW: 700Hz to 100kHz.
Use AES/EBU OUT for checking.
a. WORD CLOCK INT
Condition:
Select the value of the WORD CLOCK according to the
www
following table.
[1] Jitter
WORD CLOCK
.
INT 44． 1 kHz
INT 48 kHz
INT 88． 2 kHz
INT 96 kHz
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Output level Permissible range
+23 dBu 0.03 % or below
Output level Permissible range
+23 dBu 0.03 % or below
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y
Permissible range
i
2 nsec or below
2 nsec or below
2 nsec or below
2 nsec or below
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b. WORD CLOCK EXT
Condition: Select the WORD CLOCK as follows.
When checking WORD CLOCK IN: WORD CLOCK
When checking DIGITAL IN: AES/EBU
For the System Two frequency setting (Sample Rate),
select the value for according to the table below.
[1] Jitter (both WORD CLOCK IN and DIGITAL IN)
2-8. Checking Produced Sound
Check EFFECT functions (DSP6 operation check) by listening.
ANALOG INPUT, ANALOG OUTPUT
Condition
• WORD CLOCK: INT96kHz
• Input sound signals through ANALOG INPUT L and R
(XLR), recall the PRESET programs listed below one
after another and adjust the INPUT VOLUME so that
Q Q
the CLIP of the LEVEL METER does not light up with
3 6 7 1 3
any program.
To recall the PRESET programs, press the UP/DOWN
key to have a number flash in the 7-segment and press
the RECALL key.
PRESET programs to be checked
Program 08: AMBIENCE
Program 58: ROGER ON THE 12
Program 61: SYMPHONIC
Program 78: DYNA FILTER
Inspection:
Recall the PRESET programs and check the signal
through the speaker for at least 15 seconds. Perform this
check on all 4 types of the PRESET programs. Operate
the INPUT VOLUME and check that the output level
varies.
Judgment criteria 1: The EFFECT sounds are output.
Judgment criteria 2: No noise is included in the output.
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WORD CLOCK Permissible range
EXT 44． 1 kHz 4 nsec or below
EXT 48 kHz 4 nsec or below
EXT 88． 2 kHz 4 nsec or below
EXT 96 kHz 4 nsec or below
1 5 0 5 8 2 9 9 4
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SPX2000
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2 8 9 9
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