Hardware Overview - Rear Panel; Xlr (Audio) Inputs And Outputs; Line Inputs And Insert Sends And Returns; Instrument Hi Z Inputs - Focusrite ISA428 MkII Mode D'emploi

Hardware Overview - Rear Panel

XLR (audio) inputs and outputs

All 3-pin XLR balanced audio connectors (Output, Mic IP and EXT A/D IP) are wired as follows:
Pin 1 Screen/Chassis Pin 2 Audio 0° Pin 3 Audio 180°

Line inputs and insert sends and returns

1/4" balanced jack wired as follows:
Tip Audio 0° Ring Audio 180° Sleeve Screen/Chassis

Instrument Hi Z inputs

1/4" unbalanced jack wired as follows:
Tip Audio 0° Sleeve Screen/Chassis

Mic / line / instrument hi Z inputs (front panel)

Any one of these inputs may be used as the input to the ISA428 MkII channels 1-4. Signals routed to these inputs are referred to as
the 'internal' channels or signal paths.

Outputs - Channels 1-4

These outputs are used as the main analogue signal outputs, and are fed by whatever is connected to the Mic Inputs, Line Inputs, or
Instrument Inputs. These outputs also connect to the ADC 'internal' channels 1-4.

Insert send and return

Allows an external unit, such as a Red 3 Compressor or Red 2 EQ, to be placed within the signal chain, prior to the output and post
the high pass filter.

ADC inputs 5-8

The ADC inputs 5-8 act as line level inputs and are used to route 'external' signals to the optional ADC channels 5-8. Using these
inputs in conjunction with a single optional ADC card, up to eight analogue inputs can be routed to the eight digital outputs. Using
these inputs in conjunction with a second ISA428 MkII unit and a single optional ADC card, eight pre amps can be routed to all eight
ADC channels. (See 'Two ISA428 MkII units used as a single 8 channel ADC' on page 14.)

Retrofitting the optional ADC

The optional ADC can be retrofitted to a standard ISA428 MkII at any time. The card can be fitted easily by the user – no engineering
experience is required. Full fitting instructions for this option are included along with the ADC.
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