Yamaha DME4io-ES Service Manual page 93
Digital mixing engine satellite
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Also See for DME4io-ES:
- Owner's manual (48 pages) ,
- Manual de instrucciones (48 pages) ,
- Setup manual (23 pages)
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INSPECTIONS
1. Measurement Conditions
1-1.
Environment
Ordinary Temperature 5: – 40:
Ordinary Humidity
1-2.
Power supply voltage
Perform the test with AC110 V -10% – AC240 V+10%.
2. AD/DA characterization test
Test the AD/DA characterization using the test
program (3-15. AD Test (P. 68), 3-16. DA Test (P.
69))
2-1.
Preparations
Refer to "1-4. Connections (P. 53)" in the test
program.
2-2.
Checking the version of the program
To check the version number installed in the tested
product, refer to the Test Category Selection List
on P. 54.
Check that Ethernet Mac Address is "00.A0.DE.
xx.xx.xx". (Each product has a different number
a s s i g n e d i n t h e p o s i t i o n " x x . x x . x x " a b o v e .
EtherSound Mac Address is not necessary to
check the EtherSound Mac Address.)
2-3.
Testing Items and Criteria
Perform all the testing items of the "01. Product"
in the Test Category Selection List and check if no
failure item exists.
2-4.
Measuring Conditions
Unless otherwise specifi ed, the following conditions
should be met.
• 0 dBu=0.775 Vrms
• 600 Ω for analog output load of each channel.
• Weighting with LPF at 80 kHz, -18 dB/oct during
the measuring of total harmonic distortion and
crosstalk.
• Weighting with LPF at 12.7 kHz, -6 dB/oct during
the measuring of noise level.
Measuring should be at average values, not
root-mean-square values.
• 150 Ω Output Impedance of Oscillator.
• For items measured with designated output
level, adjust the input level using automatic
compensation etc., so that the output level should
be within the specifi ed range.
30% – 90%
DME4io-ES/DME8i-ES/DME8o-ES
• Test for "after changing the output level (24 dBu→
18 dBu)" should be performed only if the output
level is changed (24 dBu→18 dBu).
2-5.
Analog Input Part (HA·AD) Test
(Test at WORD CLOCK = 96 kHz)
Object to be measured: DME4io-ES, DME8i-ES
Measuring Points:
Measuring jig, Analog CH 1 – 8 (4) Output [Value
in the parentheses ( ) is for measuring DME4io-
ES]
Measuring Method:
Input an analog signal from CHn input of the
DME4io-ES or DME8i-ES and measure an output
signal from CHn output of the measuring jig.
[n=1 – 8 (4) Value in the parentheses ( ) is for
measuring DME4io-ES]
Take measurements referring to "3-15. AD Test "
(P. 68) of the test program.
Test No.
Fs
1
96 kHz
2
96 kHz
13
96 kHz
14
48 kHz
a. Use the test No. 1 and measure the following items.
q Voltage gain
Input Frequency Input Level Specifi ed Output Level Permissible Range
1 kHz
+10 dBu
w Frequency Characteristics
Measuring Method:
Set 1 kHz as datum, and measure a relative value for
each input frequency.
Input Frequency Input Level Output Level (Reference Value) Permissible Range
20 Hz
+10 dBu
40 kHz
+10 dBu
e Noise Level
Measuring Method:
Terminate the CHn input with 150 Ω. Measure noise
levels output from the CHn output.
[n=1 – 8 (4)
Value in the parentheses (
measuring DME4io-ES]
Permissible Range Measuring instruments
-80 dBu or below
LMV-1817
-78 dBu or below
System Two/One
HA-GAIN PHANTOM
10 dBu
OFF
-60 dBu
OFF
-60 dBu
ON
10 dBu
OFF
+4 dBu
+4 ± 2 dBu
+4 dBu
-1.0 dB – +0.5 dB
+4 dBu
-1.0 dB – +0.5 dB
) is for
93
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