ISA One User Guide Focusrite® FA0187-04
Important Safety Instructions I CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN A CAUTION :TO REDUCE THE RISK OF ELECTRIC SHOCK ,DO NOT REMOVE COVER (OR BACK ). NO USE-sERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lightning flash with arrowhead symbol ,within an equilateral triangle, is intended to alert the user to presence of uninsulated "dangerous voltage • within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric to persons .
Environmental Declaration Compliance Information Statement: Declaration of Compliance procedure Product Identification : Focusrite ISA One Responsible party: American Musi c and Sound Address : 4325 Executive Drive Suite 300, Southaven, MS 38672 Telephone: 800-431-2609 This device complies with part 15 of the FCC Rules .
Contents Warnings and Cautions .............................................................................. .............................. 2 Environmental Declaration .............................................................................. ....................... 3 Contents .............................................................................. ................................................... 5 Getting Started and Powering Up ................................................................
Front Panel 1. Gain dial: selects the gain of the input in stepped values of 10 2. Trim dial: allows an additional20dB of gain to be applied to a mic or line signal 3. Activates a gain range of 30-60dB across the stepped Gain dial [the default is 0-30dB] 4. Phantom Power switch: supplies +48V to the MIC input on the rear panel 5. Inverts the phase of the signal 6. Activates a high-pass filter 7.
Input Pressing INPUT steps through each of the three inputs, as indi ca ted by the corresponding LEOs . When the Mic LED is l it, the microphone input is active etc. An XLR input for a microphone, as well as both XLR and TRS 1/4.. inputs for line-level sources, can be found on the rear panel. A TS 1/4.. input for an instrument [01} is available on the front panel. Mic input gain With the Mic input selected, the user has access to the full gain range in 10dB steps from OdB to +60dB [yellow lege nd}.
Phase Pressing PHASE inverts the phase of the selected input to correct phase problems when using multiple microphones, or when incorrect wiring polarity has occurred. Insert Activating the INSERT switch [illuminated when active) breaks the signal path of the channel, so that the signal sent to the first ADC Input and the analogue output on the rear panel is the signal received at the INSERT RETURN connector [on the rear panel) rather than the direct mic, line or instrument signal.
Cue mix Activating the CUE MIX button sends the signal connected to the rear panel CUE MIX INPUTS to the headphones. When in cue mix mode, no inputs can be heard in the headphones. This facili ty means that, in a low latency environment, a monitor mix can be fed from a desk into ISA One to provide a suitable cue mix for the recording artist.
Rear panel 1. AOC- Optional digital output card 2. Microphone [XLR]Input 3. Line-level [XLR]Input 4. Line-level [TRS 1/4" Jack] Input 5. Outputs the main mic/line/inst input signal, as selected by the INPUT switch on the front panel 6. Outputs the instrument signal connected to the 01 Input on the front panel [regardless of whether INST is selected using the INPUT switch] 7. Calibrates the Peak Meters [see the previous section for details] 8.
The remaining analogue inputs are for an external mono signal [EXT 1/Pl and stereo signal [CUE MIX LEFT/RIGHT). The mono signal connected to EXT 1/P is summed with the main input signal and sent to the headphones for monitoring, as well as being sent independently to the second channel of the ADC, if installed. [See the Digital Options or Monitoring Options sections for details.) The stereo signal connected to CUE MIX can be routed to the headphones by activating the CUE MIX switch on the front panel.
Digital formats available on the ADC are AE5, 5/PDIF (optical and coaxial) and ADAT™ optical format.(The ADAT™ output can also operate in high-speed 5MUX mode for 96kHz transfer speeds, but is muted during 192kHz operation.! N.B. If RCA phono 15/PDIFI or XLR IAE5l connections are required, the relevant 9-pin D-type to RCA phono or XLR breakout cable is required !see below!.
AES Connector Configuration The 9-pin D-type connector labeled AES/SPDIF can be configured either as an AES or S/PDIF ded icated output using the AES/ SPDIF switch next to it. When operating the connector in AES mode, an AES cable is required . When operating in S/PDIF mode, the included S/PDIF RCA cable should be used, which automatically sets the output stream to consumer mode.
Digital Output Front Panel Controls Clock Select Lock LED ------------- ExtSync Clock Select Pressing this switch allows you to select between sample frequencies of 44.1 kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz. EXT Pressing EXT allows the ISA One to be slaved to an external word clock source.
Recording a line-level source To record a line-level signal with ISA One, carry out the following steps: 1. Connect the line-level signal, using either an XLR or a 114·· TRS Jack cable, to the appropriate LINE 1/P on the rear panel 2. Select LINE as the input source using the INPUT switch 3. Set the gain of the line signal using the two dials on the front panel and observing the VU meter or left-hand LED meter.
If only wanting to record guitar then this 2-channel facility can be used in a similar way. Only, in this instance, the AMP Outp ut on the front panel is used to feed the direct instrument signal back into the amplifier, and the microphone is used to record the amplified guitar. This way, the clean direct guitar and the amplified guitar can be recorded on separate tracks (see diagram 3 in the Signal Connections section).
Switchable Impedance: In Depth Explanation Dynamic moving coil and condenser microphones Almost all professional dynamic and condenser microphones are designed to have a relatively low nominal output impedance of between 1500 and 3000 when measured at 1kHz.
Signal Connections Recording an analogue vocal signal through a desk with backing tracks DESK Line 1/P Stereo 0/P Cue mix switch active In thi s low-latency environment, the vocal can be sent to the desk, mixed with the backing tracks and then a stereo mix be sent back to the ISA One, via the cue mix inputs.
Recording an analogue guitar signal using both inputs ..---------l Line 1/P Recording Medium Line 1/P Mic selected as input Amp In this instance, should you want to record the signals digitally, the stereo output of the digital card [if installed) will mirror the MAIN and 01 outputs [left and right respectively).
Line Input Response • Gain range= -20dB to +10dB in 10dB steps+ 20 dB of variable gain Input Impedance= 10k0 from 10Hz to 200kHz Noise at main output with gain at unity [OdB) = -96dBu measured with a 22Hz/22kHz band-pass filter Signal to noise ratio relative to max headroom [24dBu)=120dB • Signal to noise ratio relative to OdBFS [+22dBu) = 118dB • THO at unity gain [OdB) = 0.001% measured with a OdBu input signal and with a 22Hz/22kHz band-pass filter • Frequency Response at unity gain [OdB) = -0.
Front and Rear Connectivity Analogue Channel Inputs: Mic input: XLR x 1 Line input: XLR x 1 and TRS x 1 Instrument input TS Jack x 1 External ADC input: TRS Jack x 1 Return: TRS Jack x 1 Analogue Channel Outputs: Send: TRS Jack x 1 Balanced line output: XLR x 1 01 output: XLR x 1 01 through: TS Jack x 1 Analogue Channel Additional I/O: Cue mix left input: TRS Jack x 1 Cue mix right input: TRS Jack x 1 Headphones output: w· TRS Jack X 1 Warranty All Focus rite products are covered by a warranty against
Reset Sheets Input ADC Post 20 _50 _....--30-60 Gain VUCal + (+) Insert 0 +10 Y:J+IOline IO-riO 0-30-20 +48V 30-60 Phase HPF Insert Focusrite ISAOne +25 Input Zln Mic Low Zln ISA 110 Med Line High Low lnst Clock Select -2 Trim +20 0 DI/Ext Input High (+) +10 Gain +40 Instrument Dl 176.4 -6 96 -12 88.2 -18 48 -42 44.1 Ext £f 256X Phones +5 (+) Amp ADC 20 _50 _....
Environmental Declaration Compliance Information Statement: Declaration of Compliance procedure Product Identification: Responsible party: Address: Telephone: Focusrite ISA One American Music and Sound 5304 Derry Avenue #C Agoura Hills, CA 91301 800-994-4984 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, inclu!.
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The Red 3 employs an unusual and original single-VCA design to achieve high quality and truly independent compression and limiting. without the compromise and unnecessary processing involved in traditional designs. The success of the design is attested to by the Red 3"s TEC award for Outstanding Technical Achievement in the Signal Processing Technology category.
