Yamaha CL3, Руководство по обслуживанию

Страница: 124 / 401

CL3/CL1
124
2
Distortion
Input
Frequency
Output Level
Permissible
Range
1 kHz +22 dBu 0.02 % or below
3
Noise level EIN
Parameters: Short TALKBACK IN with 150 Ω .
Permissible Range
–64 dBu or below
If the measured value is out of the above permissible range,
con
fi rm that “measured value – (Gain at 1kHz)
≦
-128” is
obtained.
B. GAIN MIN
1
Gain
Input
Frequency
Input Level
Prescribed
Output Level
Permissible
Range
1 kHz –16 dBu +4 dBu +4±2 dBu
2
Distortion
Input
Frequency
Output Level
Permissible
Range
1 kHz +22 dBu 0.01 % or below
3
Noise level EIN
Parameters: Short TALKBACK IN with 150 Ω .
Permissible Range
–80 dBu or below
C. PHANTOM VOLTAGE
With No.2 and No.3 pins of XLR shorted and 10 k Ω load
connected between No.2 and No.1 pins, check that the voltage
is as follows when the +48 key is turned on.
Permissible Range
DC 33.6 – 36.1 V
Also, check that discharging starts immediately when the +48
key is turned off.
3. DIGITAL OUT Characteristic Inspection
3-1. 2TR OUT DIGITAL
Parameters: Use system Two.
Input from OMNI IN 1.
A. WORD CLOCK INT48 kHz.
Parameters: Set WORD CLOCK to INT 48 kHz.
1
Gain (2TR OUT DIGITAL)
Input
Frequency
Input Level
Prescribed
Output Level
Permissible
Range
1 kHz +10 dBu –20 dBFS –20±2 dBFS
2
f characteristic (2TR OUT DIGITAL)
Parameters: 1 kHz is used as the reference of the permissible
range.
Input
Frequency
Output Level
Permissible
Range
20 Hz +10 dBu –1.0 – 0.5 dB
20 kHz +10 dBu –1.0 – 0.5 dB
3
Distortion (2TR OUT DIGITAL)
Input
Frequency
Output Level
Permissible
Range
1 kHz –2 dBFS
0.002 % or
below
3-2. PLL Operating Range of WORD CLOCK IN
Parameters: Use the System Two.
When measuring the L channel, use OMNI OUT 7
(L).
When measuring the R channel, use OMNI OUT 8
(R).
Select WC IN for WORD CLOCK.
Input from OMNI IN 1.
Use the Dante Controller.
With the PC and Dante PRIMARY terminal of the
main unit connected with a network cable, click
the device label twice.
Click the Device Config tab on the Device View
screen.
A. 48 KHz + 4.1667 % (50 kHz)
Parameters: When checking the WORD CLOCK IN, set the
oscillator frequency to 50 kHz.
Set the Sample Rate column on the Device Con
fi g
screen as follows.
Pull-up/down: +4.1667 %
1
Distortion (WORD CLOCK IN)
Input
Frequency
Output Level
Permissible
Range
1 kHz +22 dBu 0.02 % or below
B. 44.1 kHz - 4 % (42.336 kHz)
Parameters: When checking the WORD CLOCK IN, set the
oscillator frequency to 42.336 kHz.
Set the Sample Rate column in the Device Con
fi g
screen as follows.
Sample Rate: 44 k
Pull-up/down: -4 %
1
Distortion (WORD CLOCK IN)
Input
Frequency
Output Level
Permissible
Range
1 kHz +22 dBFS 0.02 % or below