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AVSL 170.881 CL1200 User Manual

Page 4

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170.881UK User Manual

Mic/Line Input Section

Channel inputs and inserts are provided as XLR and/or 6.3mm jack sockets.

The connections for these inputs are assigned as follows.

1.

MIC input

Connect balanced microphone to this XLRF input. An unbalanced

microphone can be connected provided that +48V phantom power

not used. Wired as follows.

2. LINE input

Connect balanced or unbalanced instrument or line level signals to

this 6.3mm TRS jack input. Wired as follows.


3. Channel INSERT Signal can be sent from channel to processor(s) and returned

back to the channel by connecting a TRS jack to 2 x mono jack

lead to this connector.

The channel inserts are post Low Cut and pre-EQ.

Wired as follows.

4. +48V Phantom Press in this switch to apply phantom power to the XLR input for condenser

microphones and D.I. boxes.

5. LOW CUT

Press in this switch to apply a 75Hz 18dB/oct low frequency roll-off filter which

can help to reduce popping, rumble and handling noise from vocal microphones.

6. GAIN control

This control trims the input signal to the optimum level for the channel strip.

Too low a signal level can mean that there is not enough output from the channel and

too high can result in overload and distortion in the output.

The adjacent SIG and CLIP LEDs will give an indication of the signal level.

Ideally, the Gain rotary control should be adjusted so that the green SIG LED is lit and

the loudest passages of the input signal (e.g. bass drum beats) will just momentarily

trigger the CLIP” LED. Anything longer than a momentary flicker of the CLIP LED means

that the Gain should be reduced. Using the PFL button further down the channel strip

gives a more detailed view of the channel level on the main VU LEDs.

Balanced

Pin 1 = Ground

Pin 2 = Signal +

Pin 3 = Signal –

Unbalanced

Pin 1 = Ground

Pin 2 = Signal +

Pin 3 = Ground

Balanced

Tip = Signal +

Ring = Signal –

Sleeve = Ground

Unbalanced

Tip = Signal +

-

Sleeve = Ground

TRS jack

Tip = Send

Ring = Return

Sleeve = Ground

Left mono jack

Tip = Send

-

Sleeve = Ground

Right mono jack Tip = Return

-

Sleeve = Ground