18
EMX620
2-8 Meter LED
When the MAIN OUT and MONITOR OUT output levels are as shown in the table below, the corresponding METER LED lights up.
Table 4
[Units:dBs]
LED Name
Lighting Level
+6
+10 +/- 2
+3
+7 +/- 2
0
+4 +/- 2
-5
-1 +/- 2
-10
-6 +/- 2.5
2-9 Distortion
Set each volume control of the INPUT section and MASTER section to nominal for the systems shown in Table 1. When each output
except the REC OUT level r14 dBs, the distortion ratio should be less than 0.1 % from 20 Hz to 20 kHz.
2-10 Maximum Output Level
In the states of 2-9, the maximum output levels of MAIN OUT, MONITOR OUT and EFFECT OUT should be +20 dBs with a
distortion of less then 1%.
2-11 Equivalent Input Noise
The measurement CH level volume is assumed to be at maximum, and the other CH level volume are assumed to be at minimum in the
states of 2-3.
When the Lo-z are connected with a 150 ohms resistor, the MAIN OUT terminal noise level should be less than -61 dBs. If the noise
level does not reach -61 dBs due to a gain variance, the converted noise level (= noise level minus the actual gain of the channel) should
be less than -124 dBs. (Apply a DIN-low pass filter.)
2-12 Residual Noise
Set all the input level control at minimum in the states of 2-3. When the MASTER and EFFECT OUT level controls in the MAIN and
MONITOR section are changed to maximum or minimum, the residual noise should be as shown in the table below. (Apply a DIN-
LOW PASS filter.)
Table 5
[Units:dBs]
MASTER VOLUME
MAIN OUT (L, R )
MONITOR OUT
EFFECT OUT
Maximum
-71
-73
-73
-88
-
pins 2 and 3 of the Lo-z IN input terminal.
When the PHANTOM switch is turned on, +35 +/- 3V should be obtained between the load resistance.
When the DIGITAL EFFECT ON switch is turned on, the ON LED lights up. When the DIGITAL EFFECT ON switch is turn off,
the ON LED light goes out.
Confirm that the output sound from the vocals music’s souce has a digital effect, and confirm that the effect is able to be turned on and
off by the FOOT SW.
2-15 Stability
When a capacitor of 10 PF to 0.1
µ
F is connected in parallel to the loading resistor (4 ohm, 200W or more) at each SPEAKER OUT
terminal, or when all VR and EQ control volumes are set to MAX, there should be no abnormality; for example, there should be no
oscillation. Especially, do not oscillate if the FREQ LEVEL is at maximum.
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