QSC DPA4.2 Manual Del Usuario página 18

Set up the Inputs
NOTE!: Changes made to input levels are in real time.
HOME > INPUTS > SENS (ENTER)
Step 1 — Select Input Sensitivity
F1: A B C D
Input
Constant Sensitivity gives you maximum power out when the input device's output reaches the Sensitivity you set.
If sensitivity setting is +1.2 Vrms, a 1.2 Vrms signal from the input device results in 100V (DPA4.5) and 70V (DPA4.3) at the output of amplifier. So amplifier gain at
+1.2 Vrms sensitivity is 38 dB (DPA4.5) and 35 dB (DPA4.3). Input signal will clip 10 dB above sensitivity setting.
EN
If sensitivity setting is +3.0 Vrms, a 3.0 Vrms signal from the input device results in 100V (DPA4.5) and 70V (DPA4.5) at the output of the amplifier. So amp gain at
+3.0 dBu sensitivity is 28 dB (DPA4.5) and 25 dB (DPA4.3). Input signal will clip 10 dB above sensitivity setting.
HOME > INPUTS > INPUT GAIN (ENTER)
Step 2 — Set Input Gain
F1: A B C D
Input
Set up the Outputs
NOTE!: Changes made to outputs are in real time.
Mixer
The DPA amplifiers are equipped with an internal mixer that allows you to
adjust the signals from each input to each of the four outputs.
diagram of the Mixer for Output Channel A.
• The default setting for the Input Gain is 0.0 dB, and is set in the
INPUTS section.
• Each output channel has four inputs, each controlled by a Mixer Gain.
• The Input Gain and Mixer Gain are cumulative. For example, if you set the
Input Gain to +2.0 dB, and the Mixer Gain to -5.0 dB, the resulting output
is -3.0 dB
As a default channel "1" is mixed to output A, 2 to B, 3 to C, and 4 to D, all
other input channels are set to -100. Adjusting an Input Gain changes that
channel's input to the mixers of all channels. Changing a Mixer Gain affects only
that input for the selected output channel.
TD-000434-00-B
Input
1
Const Sens Gain (dB)
Sens 3.0 Vrms 0.0
Input
1
Const Sens Gain (dB)
Sens 3.0 Vrms 0.0
Figure 25
After confirming the
Sensitivity setting, you
can scroll to Gain and
adjust it, before moving
to the next Input.
INPUTS
Input 1
0.0 dB
Output Mixers
Input 2
0.0 dB
Output Mixers
is a
Input 3
0.0 dB
Output Mixers
Input 4
0.0 dB
Output Mixers
18
Scroll to select (3.0 or 1.2 Vrms)
To confirm selection, press
To move to the next input, press
Repeat this procedure for
remaining input channels
Scroll to select (-100 thru 20 dB)
To confirm selection, press
To move to the next input, press
Repeat this procedure for
remaining input channels
OUTPUT
MIXER A
0.0 dB
B
C
D
-100 dB
B
C
D
Output
-100 dB
B
C
D
-100 dB
B
C
D
— Figure 25 —
ENTER
SEL
ENTER
SEL
A