Advertisement
MATCHING
INPUT CHANNEL
SENSITIVITY
ТО
THE SOURCE
The pad switch
and gain control on each input channel
permit adjustment of the input sensitivity between —60 dB
апа 0 dB. With the pad out, the gain control has a sensitivity
range of —60 dB to —20 dB. With the pad in, this range is
—40 dB to 0 dB. This makes it possible to match the input
sensitivity to a broad range of input sources.
The following setting will generally apply:
Low output dynamic microphones: —50 dB.
Medium output condenser microphones: —40 dB.
Preamplified
electric
instruments
and low level (creative
audio or hi-fi) line sources: —20 dB.
High level (professional) line sources: 0 dB
We suggest the following procedure for setting input levels:
1. Connect
all input sources to their respective channels.
Monitor the mix on low-impedance type headphones. DO
NOT connect the console to any power amplifiers yet.
2. Set the CUE/PHONES
level control to about "8". You
will monitor
each input channel
by pressing the CUE
button on the respective input channel module.
ын Set master fader #1 to about "6''—this is the position that
gives rated output level, which can be checked on the
corresponding VU meter.
4. Adjust input channel mix level control #1, on the channel
that you are setting, to position "8". This will send the
input signal to master output #1, at rated output level.
өл
Start with the lowest input sensitivity (PAD switch in the
DOWN position, GAIN at —20 dB). With the input CUE
button on, so that you can monitor the signal on head-
phones,
gradually
increase
sensitivity using the GAIN
control until the signal is clearly audible. If sensitivity is
too low even with the GAIN control at maximum, return
this control to the —20 dB position, set the PAD switch in
the UP position, and slowly bring up the GAIN control
again.
|
At the optimum setting, VU meter #1 should be peaking
around 0 VU. If the meter consistently shoots past 0 VU,
or if the signal sounds distorted in your headphones, the
input sensitivity is too high, and you will need to decrease
it until the levels are correct.
As a visual aid, the peak LED on the VU meter should
only light on occasional loud peaks. If it is on longer than
this, the input sensitivity should be reduced.
6. Repeat this procedure for each input channel, until all
channels are set for proper input sensitivity. Turn the
mixing console power OFF, and connect your outputs.
Turn the power ON again. You are now ready to adjust
the remaining mix controls on each channel.
'
IMPORTANT:
The console, and all signal processing
devices connected to it, MUST be turned on BEFORE the
power amplifiers are turned on. If this procedure is not
followed, the console turn-on transient could easily cause
damage to your loudspeakers. This procedure should be
reversed when the system is turned off.
12
Advertisement
