Yamaha EMX 5000-12, Руководство по обслуживанию

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EMX5000-12/20
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5 GRAPHIC EQUALIZER CHARACTERISTICS
• In the state as described in 1, move the GEQ fader to the MIN or MAX position and check that the output level of the frequency
obtained at ST1 OUT (L, R) falls within the range given in Table 5-1 with the output level obtained at the center click position
used as a reference.
If the output level at a specified frequency does not fall within the range given in the table, vary the frequency and check that
the output level in the range as specified in the table is obtained. Also, check that the frequency variation at this time is within
the range of specified frequency
±
20%.
63 125 250 500 1k 2k 4k 8k 16k
Input signal frequency 63kHz 125kHz 250kHz 500kHz 1kHz 2kHz 4kHz 8kHz 16kHz
Variation MAX +12
±
2
width MIN -12
±
2
[Table 5-1] [Unit: dBs]
10 DISTORTION FACTOR
• n the state as shown in Tables 2-1, 2-3, 2-4 and 2-5, check that the distortion factor when +14dBs output is obtained at each
output terminal is 0.1% or less (except for REC OUT, INSERT OUT and PHONES).
In the case of PHONES, set the 12 o’clock point of the level control to the nominal position and check that the distortion factor
when +3dBs output is obtained is 0.2% or less.
11 MAXIMUM OUTPUT
• In the state as described in 1, set the GAIN control to the MAX position (or turn PAN or BAL VR clockwise or counterclockwise
fully when measuring at ST OUT), check that + 20dBs output with 1% or less distortion factor is obtained at ST OUT, MONO
OUT and AUX SEND. Also, check that +8dBs output with 1% or less distortion factor is obtained at PHONES.
6 MONO OUT LPF
• In the state as described in 1, set the input signal level to 80Hz when the MONO OUT FREQ control is at the MIN position and
to 120Hz when it is at the MAX position. (Applicable only for CH1 INPUT A)
Also check that the MONO OUT output level when the MONO OUT LPF ON/OFF switch is turned on is within the range of –
3
±
2dB with the level at the switch OFF used as a reference.
7 PEAK LED LIGHTING LEVEL
• In the state as described in 1, input a signal to INPUT A, ST CH IN (PHONE) and check that the PEAK LED lights up at the
input signal level as in Table 7-1.
8 SIGNAL LED LIGHTING LEVEL
• In the state as described in 1, input a signal to INPUT A, ST CH IN (PHONE) and check that the SIGNAL LED lights up at the
input signal level as in Table 8-1.
[Table 7-1] [Unit: dBs]
Input channel CH1~8/16 ST CH
Input signal level -43
±
3 -17
±
3
[Table 8-1] [Unit: dBs]
Input channel CH1~8/16 ST CH
Input signal level -70
±
3 -38
±
3
9 LED METER LIGHTING LEVEL
• Check that when the output level of ST OUT is as in Table 9-1, each corresponding METER LED lights up.
LED PEAK +8 +5 +3 +1 0 -1
Lighting start level +17
±
2 +12
±
2 +9
±
2 +7
±
2 +5
±
2 +4
±
2 +3
±
2
LED -3 -5 -7 -10 -15 -20 –
Lighting start level +1
±
2 +1
±
2 -3
±
2 -6
±
2 -11
±
2 -16
±
2 –
[Table 9-1] [Unit: dBs]