NXAMP4x1
62
4-7.
Channel separation
1) Ground the channel 2, channel 3 and channel 4 input terminals via a 600
Ω
resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 1 input terminal and measure the output voltage obtained at the channel
1 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 2, channel 3 and channel 4 output terminals is -65 dB or less as compared
with the reference voltage.
2) Ground the channel 1, channel 3 and channel 4 input terminals via a 600
Ω
resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 2 input terminal and measure the output voltage obtained at the channel
2 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 1, channel 3 and channel 4 output terminals is -65 dB or less as compared
with the reference voltage.
3) Ground the channel 1, channel 2 and channel 4 input terminals via a 600
Ω
resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 3 input terminal and measure the output voltage obtained at the channel
3 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 1, channel 2 and channel 4 output terminals is -65 dB or less as compared
with the reference voltage.
4) Ground the channel 1, channel 2 and channel 3 input terminals via a 600
Ω
resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 4 input terminal and measure the output voltage obtained at the channel
4 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 1, channel 2 and channel 3 output terminals is -65 dB or less as compared
with the reference voltage.
Note:
Measure the output level with the 22 Hz-22 kHz band pass filter specified at 1-3.
4-8.
Output noise level
With each input terminal grounded via a 600
Ω
resistor, measure the noise level in each output terminal and confirm that the
measured value is -60 dBu or less.
Note:
Measure the noise level with the 22 Hz-22 kHz band pass filter specified at 1-3.
4-9.
Stability
With no load resistors connected to all output terminals, input the 1 kHz, -6.0 dBu square wave and measure the primary
power consumption (Wno_load).
With the 0.1 uF capacitor connected to all output terminals, input the 1 kHz, -6.0 dBu square wave and measure the primary
power consumption (Wcap_load).
Confirm that the following equation is satisfied.
Wcap_load-Wno_load = 10 W or less
Summary of Contents for NXAMP4X1
Page 36: ...NXAMP4x1 36 B B CONTROL Circuit Board Pattern side 2NA WJ97120 10 2 ...
Page 37: ...NXAMP4x1 37 B B Pattern side 2NA WJ97120 10 2 ...
Page 40: ...NXAMP4x1 40 OUTANL Circuit Board 2NA WJ97320 10 Pattern side ...
Page 44: ...NXAMP4x1 44 B B PN AN Circuit Board 2NA WJ97170 10 1 Pattern side ...
Page 45: ...NXAMP4x1 45 2NA WJ97170 10 1 B B Pattern side ...
Page 49: ...NXAMP4x1 49 2NA WJ97350 50 B A Component side Reduction 7 10 ...
Page 50: ...NXAMP4x1 50 B B PSANL Circuit Board 2NA WJ97350 50 Pattern side Reduction 7 10 ...
Page 51: ...NXAMP4x1 51 B B 6 5 4 3 2 1 7 8 9 10 11 12 2NA WJ97350 50 Pattern side Reduction 7 10 ...
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