6.0 E4 System Setup
Input gain setup sequence
1.Set
2.Select the source Type and determine if Mic Power +12V is needed. Set Mic Power to On if required. Leave it in the Off setting if you are using line inputs.
3.Start your input source and monitor its signal on the gain signal level meter. If the level is green, go to step 4. If the level is yellow, increase the input gain until the level is green. Likewise, if the level is red, reduce the input gain until the level is green.
Programmer’s Note: You may have to repeat step 3 a few times if the input source is a CD player. The output level of a CD player varies based on the program material.
4.Set
5.Repeat steps 1 to 4 for the remaining system inputs.
When you turn
Input gain controls
Type – This setting determines the initial gain and amount of gain available for the input signal. The following table lists the choices for each input line.
Input Line | Input Type(s) Selection | Initial Gain |
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LINE 1 | Line | 0 |
LINE 2 | Line | 0 |
AUX MIC/ | Line (default) | 0 |
LINE 3 | Mic | 40 |
PAGE/MIC/ | Line | 0 |
LINE 4 | Mic | 40 |
| Line Page | 0 |
| Mic Page (default) | 40 |
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Mic power +12V – This setting enables/disables +12V phantom power only for inputs 3 and 4, which are capable of accepting microphone signals. This power source is used for condenser type microphones.
Gain slider – Click and drag the gain slider up/down to set the input gain. Changes in the slider's position are continuously sent to the E4 hardware so you will hear the change in gain as it is applied and see the change in the signal level on the meter. The gain range is dependent on the Type setting: 80 dB for Mic; 70 dB for Line.
Programmer’s Note: When setting up the system, adjust the input gain slider until the meter is green. Occasional flashes of red are acceptable.
Input gain meter – The input gain meter indicates the average input signal level of the hardware. The meter is divided into three color segments:
Amber = Low signal level
Green = Good signal level
Red = High signal level
Signal present indicator – The signal present indicator tells you if a signal is being received by the hardware:
Inactive = No signal
Green = Good signal
Red = Signal clipping
Programmer’s Note: The
The following chart shows how
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Gain (dB) |
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Compression (dB) |
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0 | 3 | 5 | 8 | 10 13 15 18 |
Input Signal Level (dBV)
Input signals from
48 of 80