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AUDIOGRAM6
2-11
Distortion
In the signal path of w, r and y in the [Table 2-6.1] and [Table 2-6.2], check that the distortion (T.H.D.) is 0.1% or less when
the output level of the STEREO OUT L, R is +8.0 dBu.
* Change the input signal frequency to "20 Hz", "1 kHz" and "20 kHz" and measure distortion (T.H.D.).
* Set the CH level controls of the channels which are not measured to minimum.
* In the signal path of y, check only the STEREO OUT L, R.
2-12
Maximum output
Input signal to the CH1 and check that the distortion (T.H.D.) is 1.0 % or less when the output signal at the STEREO OUT L, R is
+14.0 dBu.
Check that the distortion (T.H.D.) is 1.0% or less when the output level at the PHONES L, R is 0.0 dBu.
* Set the CH level controls of the channels except CH1 to minimum.
* Do not connect a load resistor to the PHONES L, R when measuring the STEREO OUT L, R.
2-13
Equivalent input noise
Check that the noise level of the STEREO OUT L, R is -48.0 dBu or less when the pin 2 and pin 3 of the XLR terminal are
connected with the resistance of 150 Ω.
If the noise level is -48.0 dBu or more, check that the input equivalent noise level is -128.0 dBu or less.
* [Equivalent input noise level] = [Noise level] - [Channel gain]
* Set the CH level controls of the channels which are not measured to minimum.
* Use the 12.7 kHz, -6 dB/octave Low Pass Filter when measuring the noise level.
* Set the parameter of the analyzer to the "Mean value" when measuring noise level.
2-14
Residual Noise
Set the CH level controls of every input to minimum.
Check that the noise level of the STEREO OUT L, R is equal to or less than the one shown in the [Table 2-14.1] when the MAS-
TER level control is set to maximum or minimum.
* Use the 12.7 kHz, -6 dB/octave Low Pass Filter when measuring the noise level.
* Set the parameter of the analyzer to the "Mean value" when measuring noise level.
Table 2-14.1 [dBu]
MASTER level
STEREO OUT
control
Maximum
Minimum
2-15
Compressor
2-15-1 Gain
Check that the output level of the STEREO OUT L, R is within the range shown in the [Table 2-15.1] when the COMP controls
of the CH1 and CH2 are set to maximum.
Table 2-15.1 [dBu]
INPUT
1
XLR
2
* Set the CH level control to NOMINAL. (Direction of clock hand at 1 o'clock)
2-15-2 Ratio
Check that the output level obtained at the STEREO OUT L, R is within the range shown in the [Table 2-15.2] compared with the
output level of the [Table 2-15.1] if the input level is raised by 10.0 dB in the state of the [Table 2-15.1].
Table 2-15.2
INPUT
1
XLR
2
16
L, R
-77.0
-95.0
Input
COMP
STEREO OUT
level
control
-64.0
Maximum
Input level
COMP
STEREO OUT
[dBu]
control
-54.0
Maximum
L, R
9.0 ± 2.0
L, R
[dB]
+3.3 ± 1.0
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