Yamaha DME24N Service Manual page 95

2-1-2. PHONES OUT L/R
Conditions
· It depends on the test program "1-26. PHONES" test.
· PHONES LEVEL should be MAX.
· Set 0dBu=0.775Vrms.
· Load of PHONES OUT L/R should be 8Ω.
q Gain, Distortion, Level Difference between L and R
(Both L and R): INT 96KHz
Input Frequency Permissible range Permissible range Permissible range
(Output Level)
1kHz +0.5±1dBu
w Residual Noise (Both L and R): INT 96KHz
Conditions: PHONES LEVEL should be MIN.
Permissible range
-86dBu or below
e Frequency Characteristics (Both L and R): INT
96KHz
Conditions: Tolerance should be 1KHz as datum.
Input Frequency Permissible range
20Hz -3~0.5dBu
r Frequency Characteristics (Both L and R): INT
96KHz
Conditions: Tolerance should be 1KHz as datum.
Input Frequency Permissible range
40kHz -3~0.5dBu
t Maximum Output (Both L and R): INT 96KHz
Input Frequency Permissible range Permissible range
1kHz +3.5dBu±0.5dBu
y Crosstalk between L → R: INT 96KHz
Input Frequency Output Level (L)
(Reference Value)
1kHz +0.5dBu
u Crosstalk between R → L: INT 96kHz
Input Frequency Output Level (R)
(Reference Value)
1kHz +0.5dBu
i Gain, Distortion (Both L and R): INT 48KHz
Input Frequency Permissible range Permissible range
(Output Level)
1kHz +0.5dBu±1dBu
o MUTE Operation (Both L and R): INT 48KHz
Input Frequency Permissible range
(Output Level)
1kHz -30dBu or below
(Distortion factor) (Difference Level)
0.1% or below Within 1.0dB
(Distortion factor)
1% or below
Permissible range (R)
-60dBu or below
Permissible range (L)
-60dBu or below
(Distortion factor)
0.1% or below
2-1-3. Checking of PLL Operating Range of DIGITAL
Input from WORD CLOCK IN, SLOT
Conditions
· For analog input, insert MY8-AD96 into the SLOT3,
and input from CH1.
· For analog output, insert MY8-DA96 into the SLOT1,
and output from CH1.
· Measure by using test No. 5 of "1-27. JITTER Test" in
the test program.
· Set 0dBu=0.775Vrms.
a. 96KHz+6% (101.76KHz)
Conditions
· Set the Frequency Setting (Sample Rate) provided
to WORD CLOCK IN to 96kHz+6%.
q Distortion (Both WORD CLOCK IN, SLOT DIGITAL
Input)
Input Frequency Input Level
1kHz +23dBu
b. 44.1KHz-10% (39.69KHz)
Conditions
· Set the Frequency Setting (Sample Rate) provided
to WORD CLOCK IN to 44.1KHz-10%.
q Distortion (Both WORD CLOCK IN, SLOT DIGITAL
Input)
Input Frequency Input Level
1kHz +23dBu
2-1-4. Jitter Measurement
Conditions
· Insert MY8-AE96 into SLOT4, and test it with
OUTPUT1/2.
a. WORD CLOCK INT
Conditions
· Measure by using test No. 1-4 of "1-27. JITTER Test"
in the test program.
q Jitter
Measuring Method···Set 1kHz as datum, and measure
a relative value for each input frequency.
Test No. WORD CLOCK
1 INT 44.1kHz
2 INT 48kHz
3 INT 88.2kHz
4 INT 96kHz
DME24N/DME64N
Permissible range
0.03% or below
Permissible range
0.03% or below
Permissible range
2n sec or below
2n sec or below
2n sec or below
2n sec or below
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