28
DTXPRESS
C-32. OUTPUT R 1kHz
[Test code]
20
[Initial indication]
32
OUTPUT
R
1kHz
[Test content]
This test checks that correct signal is outputted from OUTPUT
(R).
[Test method]
Press the [SAVE/ENTER] key to execute the test.
Execute C-31.OUTPUT L 1kHz test. If its result is OK (Refer
to [Completing the test].), testing is started automatically. Set
VOLUME to MAX.
Connect the standard phone plugs to both OUTPUT (L/MONO
and R) and measure frequency, waveform, level and total
harmonic distortion of each output signal.
Check to make sure that the plug is not connected to AUX IN.
[Check item]
• OUTPUT (R)
Frequency: 1kHz
±
3Hz
Waveform: Sine wave
Level: -5.5
±
2dBu (load of 10k
Ω
)
Total Harmonic Distortion: 0.5% or less
• OUTPUT (L/MONO)
Level: -65dBu or lower (load of 10k
Ω
)
[Indication of judgment result]
None
[MIDI code output of judgment result]
A0 20 01
(This code is outputted after the sine wave is outputted.)
When the result is OK, press [SAVE/ENTER] key, and [A0 20
02] is output from MIDI OUT and testing proceeds to the next
test.
C-33. AUX INPUT
[Test code]
21
[Initial indication]
33
AUX
INPUT
[Test content]
This test checks that the output signal which is inputted from
AUX IN is correct.
[Test method]
Press the [SAVE/ENTER] key to execute the test.
Execute C-32.OUTPUT R 1kHz test. If its result is OK (Refer
to [Completing the test].), testing is started automatically. Set
VOLUME to MAX.
Input the sine wave to AUX IN Lch and Rch, connect the
standard stereo phone plug to PHONES and measure the output
waveform level and total harmonic distortion at Lch and Rch of
PHONES.
[Check item]
■
Input the -20dBu, 1kHz sine wave to AUX IN Lch. (Rch
should be connected to ground.)
• PHONES Lch:
Level: -6.0
±
2dBu (load of 33
Ω
)
Total Harmonic Distortion: 0.5% or less
• PHONES Rch:
Level: -65dBu or lower
■
Input the -20dBu, 1kHz sine wave to AUX IN Rch. (Lch
should be connected to ground.)
• PHONES Lch:
Level: -65dBu or lower
• PHONES Rch:
Level: -6.0
±
2dBu (load of 33
Ω
)
Total Harmonic Distortion: 0.5% or less
[Indication of judgment result]
None
[Contents of FAIL judgment]
None
[MIDI code output of judgment result]
A0 21 01
(This code is output when this test is started.)
[Completing the test]
When the result is OK, press [SAVE/ENTER] key, and [A0 21
02] is output from MIDI OUT and testing proceeds to the next
test.
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