Focusrite ISA One User Manual
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Summary of Contents for Focusrite ISA One
- Page 1 Classic transformer mic pre and optional A-D card with Dante User Guide focusrite.com FA0187-03...
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Page 2: Table Of Contents
................ISA ONE CONTROLS AND FEATURES . -
Page 3: About This User Guide
About this User Guide This user guide applies to the ISA One mic pre. It provides information about installing and using the unit and how it can be connected into your system. Also included is information relating to the optional ISA ADN2 A-D interface card, which will allow audio from the Mic pre to be added to a Dante network. -
Page 4: Introduction
INTRODUCTION Thank you for purchasing the Focusrite ISA One. The ISA One is a high quality transformer microphone preamplifier which can be used to record microphone, line-level or instrument sources. Microphone and line-level sources are connected to the rear panel, whilst an independent instrument input can be plugged directly into the front panel jack socket. -
Page 5: Isa One Controls And Features
ISA ONE CONTROLS AND FEATURES Front Panel 10 dB stepped Mic & Line Gain switch. Mic: 0-30 / 30-60 dB | Line: -20 +10 dB Selects the high mic input range (30-60 dB) on the Gain switch Trim pot: 0 +20 dB for the Mic & Line inputs... -
Page 6: Operation
ISA One Controls and Features Operation Input Selection The Input button selects the input source for the main channel path: Mic / Line / Instrument. A 2nd audio path is available via the DI connector. See ‘Instrument Input’ below, and item 9 on page 9 Mic Input Gain The Gain switch adjusts the mic gain in 10 dB steps. -
Page 7: Phase
Dante clock. Lock LED Indicates that the unit is successfully synchronised to the external Word Clock. On earlier ISA One units, the lock LED may flash under certain conditions. Please refer to Appendix 4, on page 17 for additional information. -
Page 8: Metering
Metering ISA One’s front panel provides three level meters: a traditional moving-coil VU meter – which shows the average volume level, plus two peak-reading LED bargraphs – which indicate dBFS, ie., the level in dB, relative to maximum output (when the red ‘0’... -
Page 9: Rear Panel
Slot for ISA ADN2 analogue to digital conversion card. The card allows two audio signals from the ISA One to be added to a Dante network. It also provides AES3, S/PDIF and ADAT signals. See the following page for A-D card details Adjusts the VU meter ‘0’... -
Page 10: A-D Option Card
A-D Option Card The optional ISA ADN2 A-D card can be retrofitted to an ISA One at any time. Engineering experience is not required as the card can easily be installed by the user. Note that the ISA One does not support the earlier ISA 2-Channel A-D card. -
Page 11: Physical Characteristics
ISA One dimensions are illustrated in the diagram above. Allow for an additional 75mm [3”] behind the unit to allow for cable connections. ISA One comes in a freestanding case fitted with a top-mounted carrying handle. It weighs 3.9 kg [8.6 lbs] and is equipped with rubber feet for table mounting. -
Page 12: Appendices
APPENDICES 1. Connector Pinouts Mic Input / Line Input Signal Connector: XLR-3 female Screen Hot (+ve) Cold (–ve) Main Output / DI Output Signal Connector: XLR-3 male Screen Hot (+ve) Cold (–ve) Line Input / Insert Send & Return Signal Ext Input / Cue Mic In Left &... - Page 13 1. Connector Pinouts... ISA ADN2 Option Card: AES3 Out Signal Connector: XLR-3 female Screen Out Ch. 1&2 + Out Ch. 1&2 - Network 1 & 2 Cat 5/6 Core Connector type: RJ-45 receptacle White + Orange Orange White + Green Blue White + Blue Green...
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Page 14: Preamp Input Impedance
– even from average-performance microphones. Various microphone/ISA One preamp impedance combinations can be tried to achieve the desired amount of colouration for the instrument or voice being recorded. To understand how to use the impedance selection creatively, it may be useful to read the following section on how the microphone output impedance and the mic preamp input impedance interact. - Page 15 2. Pre Amp Impedance... To minimise microphone loading, and to maximise signal to noise ratio, preamps have traditionally been designed to have an input impedance about ten times greater than the average microphone, around 1.2 kΩ to 2 kΩ. (The original ISA 110 preamp design followed this convention and has an input impedance of 1.4 kΩ...
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Page 16: Pro Tools Interfacing
Appendices... 3. Pro Tools Interfacing • Analogue out to Pro Tools | HD ISA One 2 x XLR-3 female – DB25 male analogue Red 16Line Pro Tools interface • Dante to Pro Tools | HD RJ45 – RJ45 network In Ch. 2... -
Page 17: External Clock Input - Unit Differences
Appendices... 4. External Clock Input – Unit Differences The way in which ISA One responds to an external clock selection will vary slightly depending on the unit’s revision. On earlier units, the EXT clock input selections will include a 256X setting rather than the Dante Clock setting used on later units. -
Page 18: Performance And Specifications
PERFORMANCE AND SPECIFICATIONS Microphone Inputs All measurements taken at minimum gain, Z In: medium, unless otherwise stated. Measurements taken at the analogue outputs 0 to 30 dB or 30 to 60 dB (with ‘30-60’ switch enabled), in 10 dB steps, Gain Range plus 0 to 20 dB of continuous trim +7 dBu... - Page 19 Performance and Specifications . . . Connectivity Front panel Instrument input / 2 x 1/4” mono jack Amp output Rear Panel Microphone input XLR-3 female Line level input 1/4” balanced jack & XLR-3 female Main output XLR-3 male DI output XLR-3 male Insert send 1/4”...
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Page 20: Focusrite Pro Warranty And Service
You can contact our Customer Support team free of charge: Email: proaudiosupport@focusrite.com Phone (UK): +44 (0)1494 836384 Phone (USA): +1 (310) 450-8494 Troubleshooting If you are experiencing problems with your ISA One, we recommend that in the first instance, you visit our Support Help Centre at: pro.focusrite.com/help-centre...