Installation And Rear Panel Features - Yamaha MQ802 Operating Manual

INSTALLATION AND REAR PANEL FEATURES
REAR PANEL FEATURES
MQ1602
Ф AC POWER SWITCH
@ AC VOLTAGE SELECTOR
These switches select the appropriate AC power line voltage
(100, 120, 220 or 240V) according to the area where the
mixer is being used. Be sure to set the selector to your loca!
line voltage before switching on power to the mixer.
ECHO OUTPUTS (—20 and +4)
These post Echo Fader outputs are unbalanced 1/4"
(6.3 mm) standard phone jacks, both carrying the same
signal. The difference is that the lower jack has a +4dB
(1.23V rms) nominal level, and the upper jack is —20dB
(78mV rms). The actual source impedance of both jacks is
1302, so they will drive 6000, or higher impedance loads,
including almost all echo and reverb units (except those units |
meant for connection to a guitar pickup). If echo or other
effects are not required, Echo Out may be used for foldback
to stage or dressing rooms, or for making a mono tape
recording.
Ө FB OUTPUT
This post Foldback Master Fader output is an unbalanced
1/4" (6.3 mm) standard phone jack with +448 (1.23V rms)
nominal level. The actual source impedance is 1309, so the
output will drive 6000, or higher impedance loads, including-
virtually all professional graphic equalizers, electronic cross-
overs, and power amplifiers. :
© РСМ OUT L & В OUTPUTS
The Left and Right Program outputs each have two connec-
tors, a male XLR-type connector and a standard phone jack.
The post PGM L and PGM R Master Fader signal is fed to the
XLR-type connectors via transformers, so the outputs are
balanced (actually floating); the phone jacks are unbalanced.
The nominal leve! of all PGM outputs is +4dB (1.23V rms),
and the actual source impedance is 13082, which means these
outputs will drive 600 or higher impedance loads, including
virtually all professional graphic equalizers, electronic cross-
overs, power amplifiers, and tape recorders.
Q CHANNEL INPUTS (x 8, 12 or 16)
Each channel is equipped with both an unbalanced standard
1/4" (6.3mm) phone jack and a balanced, transformer-
isolated female XLR-type connector. The active connector,
XLR-type connector or phone jack, is determined with the
channel's front panel Input Selector switch. The active input
applies nominal -604В (0.78 mV rms) to +4dB (1.23V rms)
signals to the respective input channels; nominal level is set
with the Input Level switch.
The XLR-type connectors are low impedance (actual load
varies with Input Level setting from 80052 to 2.6КО). The
XL R-type connectors therefore accommodate nominal 50 to
25022 (low impedance) professional microphones as well as
6009 line level sources. The phone jacks are high impedance
(actual load varies from 25k{2 to 54k{2), and thus accom-
modate nominal 500, to 50КО, microphones we wel! as 60002
or higher impedance lines.