13
AUDIOGRAM3
2-6 Gain
Check that the output level of each output terminal is within the range shown in the [Table 2-6.1] and [Table 2-6.2].
* Check that the difference in the level between channels is 2.0 dB or less.
Table 2-6.1 INPUT1 [dBu]
INPUT
Input
level
LEVEL
control
STEREO OUT L
(PHONE)
STEREO OUT R
(PHONE)
q
PHONE
-66.0
Maximum
-2.0 ± 2.0
–
w
XLR
-22.0
Minimum
-3.0 ± 2.0
-3.0 ± 2.0
e
PHONE
(UNBAL)
-50.0
Maximum
-2.0 ± 2.0
*1
–
r
-6.0
Minimum
-2.0 ± 2.0
*1
–
*1 Set the MIC/INST switch to ON (INST).
Table 2-6.2 INPUT2 [dBu]
INPUT
Input
level
LEVEL
control
STEREO OUT L
(PIN)
STEREO OUT R
(PIN)
PHONES L
PHONES R
t
PHONE
(UNBAL)
L
-40.0
Maximum
-2.0 ± 2.0
–
-14.8 ± 2.0
–
y
R
–
-2.0 ± 2.0
–
-14.8 ± 2.0
u
PIN
L
+4.0
Minimum
-2.0 ± 2.0
–
–
–
i
R
–
-2.0 ± 2.0
–
–
2-7 Frequency
characteristics
In the signal path of
q
to
i
in the [Table 2-6.1] and [Table 2-6.2], check that the output level of each output terminal is within
the range of +1.0/-3.0 dB compared with that of 1 kHz when the signal frequency is set to 20 Hz and 20 kHz.
(LEVEL control (GAIN control) : Minimum)
* Check that the frequency characteristics is within the range of +1.0/-4.5 dB when the signal frequency is set to 20 Hz and 20
kHz and the LEVEL control (GAIN control) is at maximum.
2-8 Crosstalk
Input signal from the INPUT2 L and check that the leakage level to the STEREO OUT R is -57.0 dBu or less when the output
level of the STEREO OUT L is +10.0 dBu.
Input signal from the INPUT2 R and check that the leakage level to the STEREO OUT L is -57.0 dBu or less when the output
level of the STEREO OUT R is +10.0 dBu.
* Set the LEVEL control of the INPUT1 and INPUT2 to minimum.
* Set the LEVEL control of the OUT to NOMINAL. (Direction of clock hand at 3 o’clock)
2-9 MASTER
PEAK/SIGNAL
indicator
Check that the MSTER PEAK/SIGNAL LED lights up when a signal within the range shown in the [Table 2-9.1] is fed to the input.
Table 2-9.1
[dBu]
INPUT
Input level
PEAK
SIGNAL
1
-44.0 ± 2.0
-64.0 ± 2.0
2-10 Distortion
In the signal path of
w
,
r
,
u
and
i
of 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 LEVEL controls of the channels which are not measured to minimum.
