Dan Dugan Sound Design E, User Manual

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Dugan Model E User Guide Installation
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3.1 Bench Tests Before Installation
The Dugan Speech System can be tested with the following procedure:
1. Connect two different oscillators to inputs 1 and 2.
2. Set both to 1 kHz frequency and 0 dBu level (or -20 dBFS in digital).
3. Fine-tune the frequency of one oscillator so that the Model E gain indicators
bounce up and down at about 2 Hz (1000/1002 Hz).
4. Adjust the oscillator levels so that the gain displays are equal.
5. Leaving one oscillator in input 1, move the second signal to input 3, 4, etc.,
observing the bouncing display. This is a good way to test linked systems.
NOTE: The two inputs mix in the side chain control mix bus. The signal level on this
bus beats between no signal (subtraction) and +6 dB (addition) as the waves
phase against each other. When the two waves cancel in the control mix, both
channels will rise to full. Gains bounce down to -6 dB when the two waves add.
3.2 Audio Wiring
3.2.1 Analog I/O
The eight channel inputs and outputs are TRS insert jacks. The Model E receives sig-
nal on the Tip and sends the return from the Ring .
Figure 3-2 Analog connection
When the Model E is off, the audio signal passes through unaltered, so the unit may be
left patched when not in use.
The Model E can be connected to the insert or the line level input jacks.