Aphex 228 Instruction Manual download pdf (Page 7)

Aphex Systems Ltd. Model 228Page 6

228

instruction Manual

Page 7Aphex Systems Ltd. Model 228

228

8-channel audio interface

2.0 Installation

3.3 AC LINE CONNECTION

Observe the label to the right of the fused receptacle indicating the nominal AC supply voltage that your 228

is built for. If your supply voltage does not agree with this rating, you will have to consult the factory or an

authorized distributor or representative about changing the line voltage of your unit.

WARNING: The line voltage setting is not user convertible.

3.4 INPUT CONNECTORS

The unbalanced input connectors are located on the rear panel. There is one RCA jack per channel.

3.5 OUTPUT CONNECTORS

The balanced output connectors are located on the rear panel. There is one XLR 3-pin male jack per channel.

Pin 2 of the XLR is the impedance balanced driven and is in-phase with the signal at the RCA input jack. Pin 3 is

the undriven impedance balancing pin. Wire pins 2 and 3 to the twisted pair as a standard balanced output.

See Appendix C for proper wiring diagrams that cover a miriad of different situations.

3.1 MOUNTING

The Model 228 occupies a single rack space (45mm or 1-3/4 inches) of a standard EIA equipment rack.

When rack mounting, use appropriate cushioned rack screws. Never restrict air flow through the device’s fan

or vents. When installing the units into a rack, distribute the units evenly. Otherwise, hazardous conditions may

be created by an uneven weight distribution. Connect the unit only to a properly rated supply circuit. Reliable

earthing (grounding) of rack mounted equipment should be maintained. Try not to position the 228 directly

above devices that generate excessive heat such as power amplifiers (unless adequately ventilated) or near

equipment with heavy transformer hum fields.

3.2 REAR PANEL VIEW

2345678

UNBALANCED

INPUTS

BALANCED OUTPUTS

8 7 6 5 4 3 2 1

FUSE

1 2 3 4 5 6 7 8 9 10 11 12 ... 23 24

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Aphex 228 Instruction Manual Page 7