Dp/4+ Rules; Setting Levels; Setting The Level Switch; To Set The Input Level(S) - ENSONIQ DP/4+ Reference Manual

DP/4+ RULES

Setting Levels

The input and output levels affect the volume of audio signal going into and coming out of the
DP/4+, and are controlled by the two rows of four knobs on the left hand side of the front panel.
The top row controls the input levels for Inputs 1 to 4, the bottom row controls the output levels
for Outputs 1 to 4.

Setting the Level Switch

The Level (dBu) switch (found on the rear panel of the DP/4+) toggles between +4 dBu and -10
dBV (this affects the rear panel input and output jacks only). Because this switch can
accommodate a broad range, it allows an improved signal-to-noise ratio. This switch should be
set to match the gain structure of your mixer/amplifier, or particular application. Consult your
product's manual to determine which is appropriate.

To set the input level(s):

1. With your connections made, send a signal into the DP/4+ and slowly turn the
corresponding Input Knob(s) clockwise. The green Signal LED(s) will begin flashing as soon
as a signal is detected.
2. Turn the Input Knob(s) clockwise until the red Peak LED above the knob begins to flash.
This LED flashes when the peak level is reached, indicating that clipping is about to begin.
3. Turn the Input Knob back down (counterclockwise) just enough so that the red LED no
longer flashes. You have now attained the optimum input signal level.
4. Repeat this process for any additional inputs you have connected.

To set the output level(s):

1. With your connections made and the input level properly set, send a signal into the DP/4+
and slowly turn the corresponding Output Knob(s) clockwise. If you are using a stereo
output, use both outputs 1 and 2. You should begin to hear signal coming through the
DP/4+ into your amplifier, mixer, etc.
2. Continue turning the Output Knob clockwise as far as you can until you hear distortion in
the receiver. To optimize signal-to-noise ratio, it is best to set the output levels of the DP/4+
as high as possible without distortion, turning down the receiving channel if necessary.
3. Turn the Output Knob down (counterclockwise) just enough until there is no distortion.
4. Repeat this process for any additional outputs you have connected.
The DP/4+ circuitry is designed so that if the Input and Output Knobs are set to 12:00 (the lines
in the knobs are pointing up), and you have an input signal of +4 dBu, a +4 dBu signal will go out
of the DP/4+. With the knobs at 12:00, and an input signal of -10dBV, the output of the DP/4+
will also be -10 dBV. With these settings, any incoming signals slightly above +4 dBu or -10dBV
respectively, will result in clipping.
ENSONIQ DP/4+ Reference Manual
inputs
outputs
1 2
Output Knobs
Section 1 — Controls & Basic Functions
Input Knobs
3 4
5