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QQ
3 7 63 1515 0
2-4. Residure Noise (LPF: 12.7 kHz) (CH1, CH2, CH3, CH4)
AI8 GAIN setting
36 dB
However, outside the above tolerance level the measuring value - (gain at 1 kHz) ≦115.
AI8 GAIN setting
0 dB
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)
AI8 GAIN setting
78 dB
However, outside the above tolerance level the measuring value - (gain at 1 kHz) ≦128.
2-6. Stroke Between CH1 → CH2 (1 kHz)
AI8 GAIN setting
0 dB
CH2→CH1, CH2→CH3, CH3→CH2, CH3→CH4, and CH4→CH3 are the same.
TE
L 13942296513
2-7. SIGNAL LED Lighting Level CH2A (1 kHz)
Check that SIGNAL LED comes on and goes out at the following input level.
Input level
-8 dBu
-13 dBu
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.
2-9. Fs Operating Range (CH1, CH2, CH3, CH4)
WordClock being provided by BNC of AI8 (48 kHz +6.5%, 44.1 kHz -10%)
Set UNI circuit board so that WordClock can be switched over to BNC.
Proceed to inspection after checking that the 7-segment LED displays the following.
Display of WordClock type
q Fs=51.2 kHz（48 kHz +6.5%）
・Set Function Generator for 51.12 kHz.
・Check that the output level listed below can be achieved.
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AI8 GAIN setting
0 dB
.
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.
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Condition
Input 150Ω shorted
less than -79 dBu
Condition
Input 150Ω shorted
less than -95 dBu
Condition
Input 150Ω shorted
less than -50 dBu
CH1A input level
Condition
Input 150 Ω shorted
+23 dBu
for CH2A
Signal LED
Comes on
Goes out
（BNC）
Input frequency
Input level
x
ao
1 kHz
+23 dBu
y
i
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8
Tolerance level
Tolerance level
Tolerance level
Tolerance leveo
less than -67 dBu
Q Q
3
6 7
1 3
Tolerance level
u163
+23±1.0 dBu
.
2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
m
co
LMY4-MLF
9 9
2 8
9 9
15
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