Frequency Characteristics; High Pass Filter - Yamaha MG102c Service Manual

MG82CX/MG102C
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Table 2-6-4 ST CH INPUT (CH7/8, CH9/10: MG102C)
INPUT
7 L
9 L (MG102C)
PHONE
(LINE)
8 R
10 R (MG102C)
7 L
9 L (MG102C)
PIN
(LINE)
8 R
10 R (MG102C)
Table 2-6-5 EFFECT RETURN (MG82CX) (L/MONO, R)
AUX RETURN (MG102C) (L/MONO, R)
INPUT
L/MONO
PHONE
(LINE)
Table 2-6-6 2TR IN (L, R)
INPUT
L
PIN
(LINE)
R
TE
L 13942296513
* Set the 2TR IN level control to Maximum when measuring for Table 2-6-6.
*3 Turn on the TO STEREO/TO MONITOR switch (TO MONITOR setting).
2-7

Frequency characteristics

For the signal paths q to !2 (excluding e, y, and u) in Tables 2-6-1 to 2-6-6, check that the output level at each
output terminal when the signal frequency is set to 20 Hz and 20 kHz is within the range of +1.0/–2.5 dB compared
with output level when the signal frequency is set to 1 kHz.
* Check that the output level is within the range of +1.0/–4.5 dB when the GAIN control is at Maximum and the signal
frequency is set to 20 Hz.
* For the signal path q, check the ST OUT L, R and EFFECT SEND (AUX SEND in case of MG102C) when the
signal is input to CH1, and check only the ST OUT L when the signal is input to CH2.
* For the signal paths r to o, check only the ST OUT L or ST OUT R.
* For the signal paths !1 and !2 , check only the MONITOR OUT L, R and PHONES L, R.
2-8 High pass fi lter
Under 2-2 setting, input the signal of –36.0 dBu, 80 Hz to the MIC INPUT and turn on the
CH5/6.
Then, check that the output level at the ST OUT L is within the range shown in Table 2-8-1 compared with the level
when the switch is off.
Table 2-8-1
INPUT
MIC 1–5/6
* Set the GAIN control to Minimum.
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Input GAIN
level control
–22.0 dBu —
Input
ST OUT L
level
+3.5 dBu ± 2.0 dB
–8.0 dBu
R —
Input
ST OUT L ST OUT R
level
–12.5 dBu ± 2.0 dB
–35.8 dBu
— –12.5 dBu ± 2.0 dB
Input GAIN Input
level control frequency
–36.0 dBu Minimum 80 Hz
x ao
y
i
8
ST OUT L ST OUT R
+4.5 dBu ± 2.0 dB —
— +4.5 dBu ± 2.0 dB
+4.5 dBu ± 2.0 dB —
— +4.5 dBu ± 2.0 dB
ST OUT R
+3.5 dBu ± 2.0 dB
+3.5 dBu ± 2.0 dB
MONITOR MONITOR
OUT L OUT R
— –2.0 dBu ± 2.0 dB *3
— –2.0 dBu ± 2.0 dB *3
Q Q
3 6 7 1 3
ST OUT L
–3.0 dBu ± 2.0 dB
u163
.
2 9 9 4 2 8
EFFECT SEND (MG82CX)
AUX SEND (MG102C)
+1.5 dBu ± 2.0 dB
—
—
PHONES L PHONES R
— –13.5 dBu ± 2.0 dB *3
— –13.5 dBu ± 2.0 dB *3
1 5 0 5 8 2 9 9 4
switches of CH1 to
80
m
co
9 9
—
2 8 9 9