15
LMY4-MLF
2-4. Residure Noise (LPF: 12.7 kHz) (
CH1, CH2, CH3, CH4
)
However, outside the above tolerance level the measuring value - (gain at 1 kHz)
≦
115.
However, outside the above tolerance level the measuring value - (gain at 1 kHz)
≦
108.
2-5. EIN (LPF: 12.7 kHz) (
CH1, CH2, CH3, CH4
)
However, outside the above tolerance level the measuring value - (gain at 1 kHz)
≦
128.
2-6. Stroke Between CH1
→
CH2 (1 kHz)
CH2
→
CH1, CH2
→
CH3, CH3
→
CH2, CH3
→
CH4, and CH4
→
CH3 are the same.
2-7. SIGNAL LED Lighting Level CH2A (1 kHz)
Check that SIGNAL LED comes on and goes out at the following input level.
2-8. Phantom Voltage (
CH1, CH2, CH3, CH4
)
Set DipSW to PHANTOM ON on the circuit board and activate PHANTOM MASTER.
Check that when a resistor of 10 k ohm is connected between 2-pin and 1-pin of XLR with 2-pin and 3-pin short-circuit, the voltage
between 2-pin and 1-pin is 34 to 38 Vand that an electric discharge occurs immediately when PHANTOM MASTER is off.
)
）
・
Set Function Generator for 51.12 kHz.
・
Check that the output level listed below can be achieved.
w
Fs=39.69 kHz（44.1 kHz -10%）
・Set Function Generator for 39.69 kHz.
Make the same inspection as in
q
and check that the same output level can be achieved.
Tolerance leveo
less than -67 dBu
Condition
Input 150
Ω
shorted
for CH2A
CH1A input level
+23 dBu
AI8 GAIN setting
0 dB
Signal LED
Comes on
Goes out
Input level
-8 dBu
-13 dBu
Tolerance level
less than -50 dBu
Condition
Input 150
Ω
shorted
AI8 GAIN setting
78 dB
Tolerance level
less than -95 dBu
Condition
Input 150
Ω
shorted
AI8 GAIN setting
0 dB
Tolerance level
less than -79 dBu
Condition
Input 150
Ω
shorted
AI8 GAIN setting
36 dB
Tolerance level
+23
±
1.0 dBu
Input level
+23 dBu
Input frequency
1 kHz
AI8 GAIN setting
0 dB
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