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15
Operating the MDR1248 and MDR1688
BASIC OPERATION
The following section explains the basic operation of the
MDR1248 and MDR1688:
CONNECTING MICROPHONES AND INSTRUMENTS
1. Before connecting mics or instruments, make sure that
the power of all your system's components including
the MDR1248 and MDR1688 is turned off. Also, make
sure that the MAIN LEVEL and PHONES / CR controls are
turned all the way down.
2. Connect the cables to your microphones and instru
-
ments, and insert the other end of the cable firmly into
the appropriate input on the MDR1248 and MDR1688.
NOTE: SETTING THE INPUT GAIN - When connecting a
microphone to channels 1 through 4 on the MDR1244 or
1 through 8 on the MDR1688, it’s a good idea to start with
the Gain Control turned all the way down. Set the input
fader to the "0" position and slowly raise the GAIN control
until you see the PEAK LED turn on. Now, back the GAIN
control down so that the PEAK LED only lights for a short
time during the loudest input the channel will see.
Note. You can also press the channel's PFL switch and
use the LEVEL SET function. When the PFL is switched
on, you'll see the LEVEL SET LED is illuminated and the
channel's input level will now be displayed on the Main
VU meter.
3. Switch on the power of any peripheral devices, and
then power up the MDR1248 and MDR1688.
NOTE: It is important to remember the Golden Rule of
audio … " LAST ON, FIRST OFF". Translated, this means
that when turning on your system, you should always
turn your power amplifiers or powered monitors on LAST,
and when turning your system off, turn your power amps
off FIRST. This helps avoid any loud pops caused by rush
current at power up, or down, which can sometimes dam-
age loudspeakers.
4. Turn on your power amp or powered monitors and
raise the level control to the manufacturers recom-
mended operating level.
5. Set the MAIN LEVEL control in the MDR1248 and
MDR1688’s master section to the "0" position.
6. While speaking into the mic (or playing the instru-
ment), adjust the channel LEVEL control so that the
"0" LED of the MAIN section VU level meter lights
occasionally.
7. You can shape the tone of each channel by adjusting
the channel equalizer controls as desired.
NOTE: You may need to adjust the channel LEVEL control
to compensate for the slight changes in level after using
the channel equalizer.