MU100
12. 1 kHz SOUND OUTPUT (R) TEST
Check that the current signal is output from the OUTPUT
(R) and the PHONES (R) jacks.
Insert the appropriate phone plug into the OUTPUT (L, R), the
PHONES and the INDIV.OUTPUT (1,2) jacks and check the
output. If necessary, verify the frequency, output waveform,
output level, and THD of the OUTPUT (L,R) and the
PHONES outputs using a frequency counter, oscilloscope,
AC voltmeter(with 12.47 kHz filter) and distortion meter. If a
plug is inserted to the A/D INPUT, it must be pulled out. The
VOLUME control must be set at maximum for this check.
ITEMS TO BE CHECKED
OUTPUT (L):
less than -80 dBm
OUTPUT (R):
1 kHz +/-3 Hz, sin wave, +2.0 dBm +/-2 dB
(10 k ohm load), distortion 0.25 % or less
PHONES (L):
less than -65 dBm
PHONES (R):
1 kHz +/-3 Hz sin wave, -4.5 dBm +/-2
dB (33 ohm load), distortion 0.5 % or less
INDIV.OUTPUT1: less than -80 dBm
INDIV.OUTPUT2: less than -80 dBm
TEST END
Press the [ENTER] button. The MU100 will then
automatically proceed to the next test.
If the [EXIT] button is pressed, the MU100 will wait for
the entry of the test number.
13. INDIV.1 1kHz SOUND OUTPUT TEST
14. INDIV.2 1kHz SOUND OUTPUT TEST
This test is not performed on the MU100. After pressing
the [EXIT] button, press the [SELECT
] or [SELECT
]
button to select the next test.
15. INPUT HIGH TEST
Apply a signal to [A/D INPUT], and check that the signal
obtained at the [OUTPUT] is controlled in gain with the
A/D INPUT.
Check that the level meters on the LCD light up when the
provided signal is applied to [INPUT].
Insert the appropriate phone plug into the OUTPUT (L, R) and
the PHONES jacks and check the output. If necessary, verify
the frequency, output waveform, output level, and THD of the
OUTPUT (L,R) and the PHONES outputs using a
frequency counter, oscilloscope, AC voltmeter (with 12.47
kHz filter) and distortion meter. The VOLUME control
must be set at maximum for this check.
ITEMS TO BE CHECKED
Listed below are the specifications and conditions of the
OUTPUT(L,R) outputs during this test.
When a sine wave signal of -36.0 dBm, 1 kHz is applied to
A/D INPUT (L), and A/D INPUT is set at maximum, and
A/D INPUT (R) is connected to the ground:
OUTPUT (L):
+5 dBm +/-2 dB (10 ohm load), distortion
0.5 % or less
OUTPUT (R):
less than -48 dBm
When a sine wave signal of -36.0 dBm, 1 kHz is applied to
A/D INPUT (R), and A/D INPUT is set at maximum, and
A/D INPUT (L) is connected to the ground:
OUTPUT (L):
less than -48 dBm
OUTPUT (R):
+5 dBm +/-2 dB (10 ohm load), distortion
0.5% or less
When a sine wave signal of -36.0 dBm, 1 kHz is applied to
A/D INPUT (L), and A/D INPUT is set at minimum, and
A/D INPUT (R) is connected to the ground:
OUTPUT (L):
less than -66 dBm
When a sine wave signal of -36.0 dBm, 1 kHz is applied to
A/D INPUT (R), and A/D INPUT is set at minimum, and
A/D INPUT (L) is connected to the ground:
OUTPUT (R):
less than -66 dBm
Check that the level meters on the LCD will light up, when
the sine wave of -29.0 dBm +/-2 dB, 1 kHz is applied to the
A/D INPUT (L).
TEST END
Press the [ENTER] button. The MU100 will then
automatically proceed to the next test.
If the [EXIT] button is pressed, the MU100 will wait for
the entry of the test number.
16. INPUT LOW TEST
Apply a signal to [A/D INPUT], and check that the signal
obtained at the [OUTPUT] is controlled in gain with the
A/D INPUT.
Check that the level meters on the LCD light up when the
provided signal is applied to [INPUT].
Insert the appropriate phone plug into the OUTPUT (L, R)
and the PHONES jacks and check the output. If necessary,
verify the frequency, output waveform, output level, and
THD of the OUTPUT (L,R) and the PHONES outputs
using a frequency counter, oscilloscope, AC voltmeter(with
12.47 kHz filter) and distortion meter. The VOLUME
control must be set at maximum for this check.
ITEMS TO BE CHECKED
Listed below are the specifications and conditions of the
OUTPUT(L,R) outputs during this test.
12 OUTPUT R 1 kHz
15 INPUT HIGH
16 INPUT LOW
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