Aphex 228 - Manual (Page 10)

Aphex Systems Ltd. Model 228 Page 8
228
instruction Manual
Page 9 Aphex Systems Ltd. Model 228
228
8-channel audio interface
Specifications
4.2 ARCHITECTURAL SPECIFICATIONS
Electrical Description
An active electronic device for transforming eight low level unbalanced audio lines into eight high level bal-
anced audio lines. All eight input jacks shall be the gold plated RCA type. The input amplifiers shall be designed
to reject ground loop hum that may flow into the unit’s chassis from the input cable’s shield conductor. All
eight outputs shall use gold plated standard XLR 3-pin male jacks. All outputs shall be impedance balanced
with pin 2 driven through a balancing impedance and pin 3 returning to ground through a balancing imped-
ance. The signal on pin 2 shall be in-phase with the RCA jack input signal. The gain shall be variable for each
channel independently from 11.79dB to 0dB. When the gain control is set fully clockwise, the gain shall be in
a calibrated condition of 11.79dB +/- 0.5dB. There shall be one dual color LED for each channel to indicate
input signal presence greater than -30dBV by green flashing, and cliping conditions indicated by red flashing.
A single LED expanded VU meter shall be selectable to any channel. The VU meter shall indicate a range of
-21dB to +21dB.
Physical Properties
The device shall be packaged in an all metal chassis measuring 19” (482.23mm) wide, 1.75” (44.42mm) high,
with an overall depth of 8.25” (210mm). Depth behind the front panel shall be approximately 8” (203mm).
The device shall have a net weight of approximately 6lbs. (2.73kg) and is capable of mounting in a standard
electronic equipment rack.
Power
The unit shall have a self contained power supply operating from the ac line. Primary voltage, connectorization
and agency listings shall meet the governing standards where units are sold.