Vu Meters - Yamaha MC1204 Operating Manual

CD ECHO RETURN connectors
These connectors accept the output signal from exter ­
nal echo. delay or reverb devices fed by the ECHO
SEND connectors. These are unbalanced inputs with
an input level/impedance of
+
4 dB/600 ohms.
• ECHO SEND connectors
The signal from these connectors is sent to external
echo. delay. or reverb devices. These are unbalanced
outputs with an output level/impedance of
+
4 dB/600
ohms.
• GROUP OUT connectors
These connectors deliver the main group output signals
to the power amplifiers which will drive the main house
speakers in a sound reinforcement system. or a tape
deck for recording applications. These are electronically
balanced outputs with a rated level/impedance of
+
4
dB/600 ohms.
o
FB OUT connectors
The output from these connectors will mainly be used
to drive the power amplifiers which will feed the stage
monitor speakers in a sound reinforcement system. In a
VU METERS
recording system. both FB OUTs could be used to drive
the "control room" monitor system. or only one FB
OUT could be used for the control room monitors. and
one used to drive a studio monitor or cue system. For
theater sound applications. the FB OUTs could be used
to drive a "fill" speaker system. These are electronical­
ly balanced outputs with a rated level/impedance of
+
4 dB/600 ohms .
til
STEREO OUT connectors
The stereo outputs can be used to feed the power
amplifiers which will drive the main house speakers in
a sound reinforcement system. or a stereo tape deck
for recording. These are balanced outputs with a rated
output level/impedance of
+
4 dB/600 ohms.
., POWER switch
Turn this switch ON to apply AC power to the mixer.
The VU meters light to indicate power ON.
4&
AC POWER CORD
This 3-wire cord is for connection to any 120 V
AC. 60 Hz grounded outlet. (General model: 110-120 V.
220-240 V. 50/60 Hz).
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7 5 3 0
PE:"
~\\'
\ \ \ 1111/1 1
,,#.]
- Of>,o
60
SO,Oo,:
+
VU
IlIWtA
GROUP 1'2
FB 1'2
GROUP 3 ' 4
• ECH01'2
o
VU Meters
These are VU-ballistic level meters with built-in peak in ­
dicator LEDs. The VU meters can be used to monitor
the GROUP 1-4. FB 1 and 2. ECHO 1 and 2. and
STEREO Land R output levels. A VU meter reading of
o
dB corresponds to rated output. The PEAK LEDs light
at 8 dB above 0 VU .
VU METER
-20 VU -10 VU -5 VU
o
VU +3 VU
READING
+4 dB
-16 dB -6 dB -1 dB +4 dB + 7 dB
Outputs (123 mV) (388 mV)
(691
mV)
(1.23
V)
(1.74
V)
-10 dB
-30 dB -20dB -15 dB -10 dB -7 dB
Outputs (24.5
mV)
(77.5 mV) (138 mV) (245 mV) (346 mV)
8 Meter Function Switches (MC1204, MC1604 only)
These switches determine the function of the
GROUP/FB and GROUP/ECHO VU meters. The
GROUP/FB meters can be switched to read either
GROUP 1 and 2 or FB 1 and 2 levels. while the
GROUP/ECHO meters can be switched to read either
GROUP 3 and 4 or ECHO 1 and 2 levels.
9