Focusrite ISA 428 Pre Pack User Manual Download Page 14

ENGLISH

14

Warranty

All Focusrite products are covered by a warranty against
manufacturing defects in material or craftsmanship for a
period of one year from the date of purchase. Focusrite in
the UK, or its authorised distributors worldwide, will do
their best to ensure that any fault is remedied as quickly as
possible. This warranty is in addition to your statutory
rights.

This warranty does not cover any of the following:

 

Carriage to and from the dealer or factory for
inspection or repair.

 

Labour charge if repaired other than by the distributor
in the country of purchase or Focusrite in the UK.

 

Consequential loss or damage, direct or indirect, of any
kind, however caused.

 

Any damage or faults caused by abuse, negligence,
improper operation, storage or maintenance.

If a product is faulty, please first contact the dealer from
which the product was purchased. If the product is to be
shipped back, please ensure that it is packed correctly,
preferably in the original packing materials. We will do our
best to remedy the fault as quickly as possible.

Please help us to serve you better by completing and
returning the Warranty Registration Card, or registering
online at http://www.focusrite.com. Thank you.

Accuracy

Whilst every effort has been made to ensure the accuracy
and content of this manual, Focusrite Audio Engineering Ltd
makes no representations or warranties regarding the
contents.

Copyright

© 2002-2003 Focusrite Audio Engineering Ltd. All rights
reserved. No part of this manual may be reproduced,
photocopied, stored on a retrieval system, transmitted or
passed to a third party by any means or in any form without
the express prior consent of Focusrite Audio Engineering
Ltd.

ADAT™ is a registered trade mark of Alesis Corporation
Inc.

192 HD™ is a registered trade mark of Digidesign Inc.

Summary of Contents for ISA 428 Pre Pack

Page 1: ... following conditions If the power cord or plug is damaged if liquid has entered the unit if the unit has been dropped or the case damaged if the unit does not operate normally or exhibits a distinct change in performance Adjust only those controls that are covered by the operating instructions Do not defeat the safety purpose of the polarised or grounding type plug A polarised plug has two blades...

Page 2: ...nt Inputs These outputs also connect to the ADC internal channels 1 4 via the Soft Limiter circuit 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...

Page 3: ... user of the signal level in the channel after gain has been applied by the pre amp and also shows the level of the signal being sent to any external equipment connected to the insert send output The meter is calibrated relative to the overload point of the optional ADC card 0dBfs on the meter refers to the maximum level that can be converted by the ADC and relative to the analogue overload point ...

Page 4: ...settings ranging from 20dB to 10dB indicated on the front panel by the arc of white numbers around the gain knob The 30 60 switch is inactive when the line input is selected as the gain range for Line level inputs is restricted to 20dB to 10dB in 10dB steps An additional 20dB of gain can be applied to the signal after the Mic line gain knob using the Trim knob See Trim control text below for full ...

Page 5: ...the optional ISA 428 digital output board The 4 external ADC inputs and the main channel inputs can all be fed to the ADC via the Soft Limiter ensuring eight super clean protected high quality paths to digital A single ISA 428 unit can act as an 8 channel digital input expansion unit to any DAW Channels 1 4 always route respectively to ADC output channels 1 4 Alternatively two ISA 428 units with a...

Page 6: ...gital channels of a single AES connection known as 2 wire Therefore one AES channel can only send a single channel of digital data and thus the 9 pin D type is switched from transmitting 8 channels of data to sending 4 channels of data Therefore to send all 8 channels from the ISA 428 in this mode requires two AES connectors one sending channels 1 to 4 AES SPDIF connector and the other sending cha...

Page 7: ...se ratio pre amps have traditionally been designed to have an input impedance about ten times greater than the average microphone around 1 2kΩ to 2kΩ The original ISA 110 pre amp design followed this convention and has an input impedance of 1 4kΩ at 1kHz Input impedance settings greater than 2kΩ tend to make the frequency related variations of microphone output less significant than at low impedan...

Page 8: ...ENGLISH 8 Signal Connections ...

Page 9: ...I O Calibration Mode Instructions Digital Mode Connecting the ISA 428 AES digital output 9 way connector to the HD unit 25 way AES EBU I O connector requires two cables The Focusrite ISA 428 9 way cable to 4 off XLR is required to retrieve the AES signals from the ISA 428 ADC card and this should be connected to the AES input connectors on the Digidesign 25 way to AES I O XLR cable This cable is a...

Page 10: ...th the powerful Bass Expander makes this unit a must have for any dance music engineer or musician Platinum MixMaster An analogue stereo audio processor designed primarily for project studio mastering However with so many useful features in one box anyone involved in the business of making music will quickly find it indispensable at other stages of the recording process too Platinum Penta Every dy...

Page 11: ... convert a 4 pre to digital system to an 8 pre to digital system Q Can I use 2x ISA 428s with 1x A D card If so how does the routing work A Yes Mic pre s 1 to 4 on the first unit route directly via the limiter to digital outputs 1 2 3 4 Mic pre s 5 to 8 on the second unit then route out of their respective analogue outputs and loop back in to the line inputs 5 6 7 8 on the first unit These then ro...

Page 12: ... compared to the old 16 bit 44 1kHz standards This is especially important if further digital signal processing is to be applied to the signal once converted to digital as any mathematical operations taking place on the data for example as a result of a gain change or dynamic effect process may result in quantization and rounding errors The higher the resolution of the digital data the smaller the...

Page 13: ...Response Gain range 10dB to 40dB continuously variable Input Impedance 1Meg Ohm Noise at minimum gain 0dB 90dBu measured with a 20Hz 22kHz bandpass filter Noise at maximum gain 40dB 78dBu measured with a 20Hz 22kHz bandpass filter THD at minimum gain 0dB 006 measured with 10dBu input signal and with a 20Hz 22kHz bandpass filter Frequency Response at 10dB gain 0 2dB down at 26Hz and 0dB at 32kHz Fr...

Page 14: ...se first contact the dealer from which the product was purchased If the product is to be shipped back please ensure that it is packed correctly preferably in the original packing materials We will do our best to remedy the fault as quickly as possible Please help us to serve you better by completing and returning the Warranty Registration Card or registering online at http www focusrite com Thank ...

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