Yamaha DME24N, Руководство по обслуживанию

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DME24N/DME64N
85
e
Frequency Characteristics
Measuring Method··· Set 1kHz as datum, and measure
a relative value for each input frequency.
r
Maximum Output
2-1-3. PLL Operating Range of WORD CLOCK IN
Measuring Points··· Analog CH 1 OUT
Measuring Method··· Input an analog signal from CH1
input, and measure an output signal from CH1 output.
a. Test at Upper Limit 96kHz+6% (101.76kHz)
· Set the frequency setting of the oscillator to
96kHz+6% (101.76kHz).
· Connect the clock output of the oscillator with a WCLK
IN terminal of the product, and input a clock signal of
the above frequency.
· Press “ENTER” to return “TEST CASE No. Selection
Mode” for a time.
· Select the “TEST CASE:#8” (see 2-1-2-1 Diag Mode
Settings), and press “ENTER”.
q
Total Harmonic Distortion
b. Test at Lower Limit 44.1kHz-10% (39.69kHz)
· Set the frequency setting of the oscillator to 44.1kHz-
10% (39.69kHz).
· Connect the clock output of the oscillator with a WCLK
IN terminal of the product, and input a clock signal of
the above frequency.
· Press “ENTER” to return “TEST CASE No. Selection
Mode” for a time.
· Select the “TEST CASE:#9” (see 2-1-2-1 Diag Mode
Settings), and press “ENTER”.
q
Total Harmonic Distortion
2-1-4. PHONES OUT L/ R
Conditions
· Measure by using the testing item No. 26 in the test
category “01. Product” of the test program. Select
“TEST CASE #X” depending on the measuring item.
· PHONES LEVEL should be MAX.
· Set 0dBu=0.775Vrms.
· Load of PHONES OUT L/R should be 8
Ω
.
q
Gain, Distortion, Level Difference between L and
R (Both L and R): INT 96kHz
w
Residual Noise (Both L and R): INT 96kHz
Condition: PHONES LEVEL should be MIN.
e
Frequency Characteristics (Both L and R): INT
96kHz
Condition: Tolerance should be 1KHz as datum.
r
Frequency Characteristics (Both L and R): INT
96kHz
Condition: Tolerance should be 1KHz as datum.
t
Maximum Output (Both L and R): INT 96kHz
y
Crosstalk between L → R: INT 96kHz
u
Crosstalk between R → L: INT 96kHz
Permissible range
-86dBu or below
Input Frequency Permissible range
20Hz -3~0.5dBu
Input Frequency Input Level Output Level Permissible range
(Reference Value)
20Hz +10dBu +4dBu -1.0~+0.5dB
20kHz +10dBu +4dBu -1.0~+0.5dB
Input Frequency Input Level Output Level Permissible range
(Reference Value) (Distortion factor)
1kHz +30dBu +24dBu 0.01% or below
Input Frequency Input Level Output Level Permissible range
(Reference Value)
1kHz +28dBu +22dBu 0.01% or below
Input Frequency Input Level Output Level Permissible range
(Reference Value)
1kHz +28dBu +22dBu 0.015% or below
Input Frequency Permissible range Permissible range Permissible range
(Output Level) (Distortion factor) (Difference Level)
1kHz +0.5
±
1dBu 0.1% or below Within 1.0dB
Input Frequency Permissible range
40kHz -3~0.5dBu
Input Frequency Permissible range Permissible range
(Distortion factor)
1kHz +3.5
±
0.5dBu 1% or below
Input Frequency Output Level (L) Permissible range (R)
(Reference Value) (Distortion factor)
1kHz +0.5dBu 1% or below
Input Frequency Output Level (R) Permissible range (L)
(Reference Value) (Distortion factor)
1kHz +0.5dBu -60dBu or below