Model 2192 Master Digital Audio Interface Manual Part Number: 65-0701 Revision 1.02 Universal Audio, Inc. 1700 Green Hills Road Scotts Valley, CA 95066-4926 831-440-1176 voice 831-461-1550 fax 877-698-2834 technical support hardwaresupport@uaudio.com www.uaudio.
Notice Important Safety Instructions Before using this unit, be sure to carefully read the applicable items of these operating instructions and the safety suggestions. Afterwards keep them handy for future reference. Take special care to follow the warnings indicated on the unit, as well as in the operating instructions. Water and Moisture – Do not use the unit near any source of water or in excessively moist environments.
FCC Compliance This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
Contents Notice ....................................................................................2 Important Safety Instructions .................................................................................... 2 FCC Compliance .................................................................................................... 3 Disclaimer.............................................................................................................. 3 Copyright ..........................................
Controls ................................................................................23 LED Level Meters .................................................................................................. 23 Clock Source........................................................................................................ 23 Sample Rate Select ............................................................................................... 25 Clock Status Lamp..............................................
Diagrams .............................................................................40 Frequency Response ............................................................................................. 40 Dynamic Range: A/D ............................................................................................ 41 Dynamic Range: D/A ............................................................................................ 41 Mastering Setup..............................................................
Introduction Analog Ears, Digital Minds Thank you for using the 2192 Master Digital Audio Interface, the first product to combine Universal Audio’s long history of creating high-quality vintage analog gear with its advanced digital technology. Conversion The soul of the 2192 is the analog circuitry used in the A/D and D/A converters.
Clocking The internal digital clock of the 2192 was designed for extreme stability and jitter-free operation. The internal clock conditioner removes jitter from external sources, so conversion quality is unaffected by clock source. Combined with its extensive digital I/O, flexible front-panel routing controls, and phase aligned clock conditioner, the 2192 provides high-quality master clock source and clock distribution for your entire studio.
Features • Ultra-low noise 44.1kHz – 192kHz A/D and D/A converters • Low jitter internal clock source provides 44.1, 48, 88.2, 96, 176.4 and 192kHz sampling rates • DC-coupled, fully dual-differential, matched-FET, all discrete Class-A, no-compromises analog signal path • No capacitors in the signal path to degrade sound quality or introduce phase distortion • 2 channel ADAT S-MUX I/O for 44.1kHz to 48kHz transmission of 44.1kHz to 192kHz audio • 2 Channel transformer coupled AES/EBU I/O (44.
Specifications Analog • Inputs: • Outputs: • 2x balanced XLR female connectors DC coupled, dual-differential Common-mode rejection ratio (CMRR): >90dB Impedance: ~1.5k ohms Maximum input level: +31dBu 2x balanced XLR male connectors DC coupled, dual-differential Impedance: ~95ohms Maximum output level: +23dBu Frequency Response (analog input to ADC to DAC to analog output, referenced to 1kHz, Fs = 192kHz): +- 0.
o Residual noise (200Hz-20kHz): < -145dBFS (-123dBu) o Total Harmonic Distortion + Noise (measured at 1kHz): -110dB, with +4dBu input -114dB, with -10dBu input • D/A: o Dynamic range (measured with -60dBFS = -38dBu output at 1kHz (See Figure 7: D/A Dynamic Range on page 41) 122dB (A-weighted), 119dB (unweighted) o Frequency response (relative to 1kHz): +- 0.03dB, 10Hz to 20kHz @ Fs = 44.1kHz +- 0.04dB, 10Hz to 20kHz @ Fs = 96kHz o Phase response: <0.
Digital • 2-Channel S/PDIF: Dual stacked RCA Unbalanced, transformer driven output AC coupled input • 2-Channel AES/EBU: Transformer isolated, balanced XLR (x4) Single wire and dual-wire modes (for sample rates above 96kHz) o AES/SPDIF input bits: SCMS: Ignored Preempahsis: Ignored Professional/consumer: Ignored o AES/SPDIF output bits: SCMS: Not set Preempahsis: Not Set Professional/consumer: Set to Professional • 2-Channel ADAT Optical: Dual in-line optical TX/RX (reinforce
Front Panel Figure 1 below displays the names of the 2192 front panel elements along with an index number. Table 1 below indicates the page number where a complete description of the indexed item can be found.
Rear Panel Figure 2 below displays the names of the 2192 rear panel elements along with an index number. Table 2 below indicates the page number where a complete description of the item can be found.
Block Diagram Figure 3: Block Diagram 15
Connections All 2192 connectors are on the rear panel of the unit. The only adjustable controls on the rear panel are the analog level trims (page 19). Each connector and its function are detailed below. AC Power Input AC power is input to the 2192 via a standard, detachable IEC power cable such as the one supplied with the unit. The auto-sensing, multi-stage filtered, universal power supply accepts input power from 100VAC to 240VAC, at 50Hz to 60Hz.
AES/EBU Digital Input B This female XLR jack receives the right channel of incoming 24 bit 176.4 or 192kHz AES/EBU digital audio signals at 88.2 or 96kHz when in dual wire mode. In single wire mode, this input is ignored. Pin 2 is hot. AES/EBU Digital Output B In dual wire mode, this male XLR plug transmits one channel of 24 bit 176.4 or 192kHz AES/EBU digital audio signals at 88.2 and 96kHz.
Superclock (256x) is not supported. Vari-speed sync is supported. The 2192 BNC word clock inputs each provide an internal 75-ohm terminator. Word Clock Input 1 This word clock input is used for external synchronization when the Clock knob (page 23) set to Word 1. Word Clock Input 2 This word clock input is used for external synchronization when the Clock knob (page 23) set to Word 2. ADAT Optical Digital I/O The 2192 provides standard ADAT digital I/O via this optical interface. At sample rates of 44.
The analog outputs are calibrated at the factory so that a digital signal level of –18dBFS will output an analog level of +4dBu, for 18dB of headroom. The line outputs can drive high or low (600ohm) impedance inputs with no changes in level. Analog Line Trims The analog line trims are used to calibrate analog I/O signal levels to match external analog hardware.
To calibrate the analog line inputs: 1. Connect the analog reference generator to the analog input channel of the 2192. 2. Connect the digital output of the 2192 to the digital signal meter. 3. Set the reference generator to output a 1kHz sine wave at the desired nominal signal level. The factory setting is +4dBu. 4. Adjust the input trim until the desired RMS digital level is obtained. The factory setting is 18dBFS. 5. Repeat these steps for the other channel. To calibrate the analog line outputs: 1.
To calibrate the Output Level Meters: 1. With the unit powered down, remove the AC line cord. 2. Place the unit on a flat, stable area and remove top cover. 3. Attach the AC line cord and power up the unit. With the AC cord attached to the unit there are dangerous AC voltages present. Use extreme caution! 4. Connect the digital tone generator to the digital input of the 2192. 5. Set the digital generator to output a 1kHz sine wave at -18dB. 6.
Ground Isolation Jumpers Each of the eight balanced connectors (the analog and AES/EBU digital I/O) can individually isolate pin 1 from ground if desired via an internal jumper block. Table 3 below indicates which internal jumper is used for each balanced connector. Pin 1 is tied to ground for the connector when the indicated pair of pins is jumpered. The 2192 is shipped from the factory with pin 1 connected to ground on all eight connectors.
Controls The front panel contains most of the user adjustable controls and indicators for the 2192. The only controls located on the rear panel are the analog input and output line level trim controls (see Analog Line Trims on page 19). Important: Do not change any front panel knob or switch settings while audio conversion or transcoding is in process. The signal is briefly interrupted when new settings are applied.
The 2192 sample rate is determined by the Clock and Sample Rate knobs except when the clock source is set to AES/SPDIF, in which case the sample rate is automatically detected. See Table 4 below.
ADAT When the Clock knob is set to ADAT, the digital clock signal present at the ADAT optical digital input (page 18) on the rear panel is used as the master clock. At this setting, the Sample Rate knob now selects the multiple of the ADAT clock rate to be used internally. For example, if the ADAT input is 48kHz, the 44.1 and 48kHz sample rates select 1x sampling, the 88.2 and 96kHz sample rates select 2x sampling, and the 176.4 and 192kHz sample rates select 4x sampling.
Sample Rate Knob Setting 44.1 Incoming Clock Rate 48 88.2 96 176.4 192 44.1 48 88.2 96 176.4 192 44.1 44.1 88.2 88.2 176.4 176.4 48 48 96 96 192 192 44.1 44.1 88.2 88.2 176.4 176.4 48 48 96 96 192 192 44.1 44.1 88.2 88.2 176.4 176.
ADAT In When the Analog Outputs knob is set to ADAT In, the digital signal from the ADAT optical input (page 18) is routed to the D/A converters and analog outputs. The S–MUX mode is determined by the Sample Rate knob. ADC When the Analog Outputs knob is set to ADC, the digitally converted signal at the analog inputs (see page 18) is routed to the D/A converters and analog outputs.
Important: At this setting, the digital signal (AES or S/PDIF) routed to the digital outputs is determined by the AES/SPDIF switch. ADAT In When the Digital Outputs knob is set to ADAT In, the digital signal from the ADAT optical digital input (page 18) is routed to all digital outputs. ADC When the Digital Outputs knob is set to ADC, the signals at the analog inputs (page 18) are converted and delivered to the digital outputs.
Clocking The internal digital clock of the 2192 was designed for extreme stability and jitter-free operation. The internal clock conditioner removes jitter from external sources, so conversion quality is unaffected by clock source. Flexibility Combined with its extensive digital I/O, flexible front-panel routing controls, and phase aligned clock conditioner, the 2192 provides high-quality master clock source and clock distribution for your entire studio.
Analog to Digital Conversion Analog signals can be converted to digital at sampling rates of 44.1, 48, 88.2, 96, 176.4, and 192kHz. The digital output signal is in 24-bit format. The digitized signal is sent to all digital outputs (AES/EBU, S/PDIF, and ADAT S–MUX) simultaneously. Audio digitized at rates above 48kHz is transmitted over AES/EBU in single or dual-wire mode, as specified by the Single/Dual switch (page 27).
A/D Using External Clock In this configuration, the 2192 is synchronized (slaved) to an external master digital source clock. Two separate word clock inputs as well as AES/EBU, S/PDIF, and ADAT S-MUX can be used as clock sources for external synchronization. In this mode, A/D conversion is accomplished at any available 2192 sample rate even if the external clock is running at a multiple or submultiple of the 2192 sample rate. To perform A/D conversion using external clock: 1.
Digital to Analog Conversion Digital signals can be converted to analog at sampling rates between 44.1 and 192kHz. All 24bits of the digital input signal are converted. If the digital source has less than 24-bit resolution, it’s recommended that high quality dither be applied before conversion. Any of the digital audio input sources (AES/EBU, S/PDIF, or ADAT S-MUX), or the digitized analog inputs can be converted to analog audio.
D/A Using Digital Audio Source Clock In this configuration, the 2192 is synchronized to the clock signal that is imbedded within the digital audio signal that is being converted to analog. To perform D/A conversion using the digital audio source clock: 1. Connect the 2192 analog outputs to the analog inputs of the destination device (mixer, recorder, etc). 2. Connect the digital output of the external digital audio source device to the desired 2192 digital input using an appropriate digital cable. 3.
D/A Using External BNC Word Clock In this configuration, D/A conversion is accomplished while the 2192 is synchronized to one of the two independent BNC Word Clock inputs. To perform D/A conversion while synchronized to Word Clock: 1. Connect the 2192 analog outputs to the analog inputs of the destination device (mixer, recorder, etc). 2. Connect the digital output of the external digital audio source device to the desired 2192 digital input using an appropriate digital cable. 3.
D/A Using ADAT Clock with AES/SPDIF Audio In this configuration, D/A conversion is accomplished on an AES/EBU or S/PDIF digital audio signal while the 2192 is synchronized to the clock at the ADAT input. The audio portion (if any) of the ADAT signal used as the clock source is ignored. To perform AES or SPDIF D/A while synchronized to ADAT clock: 1. Connect the 2192 analog outputs to the analog inputs of the destination device (mixer, recorder, etc). 2.
D/A Using AES/SPDIF Clock with ADAT Audio In this configuration, D/A conversion is accomplished on an ADAT digital audio signal while the 2192 is synchronized to the clock of an AES/EBU or S/PDIF signal. The audio portion (if any) of the external AES/SPDIF signal used as the clock source is ignored. To perform ADAT D/A while synchronized to AES or SPDIF clock: 1. Connect the 2192 analog outputs to the analog inputs of the destination device (mixer, recorder, etc). 2.
Transcoding The 2192 can transcode (convert) digital audio data between AES/EBU, S/PDIF, and ADAT S-MUX formats in realtime. The transcoded digital audio input signal is output to all of the other digital audio outputs simultaneously. Transcoding can be performed using any of the available clock sources. The 2192 does not perform sample rate conversion. Note: You cannot clock to S/PDIF while listening to AES/EBU or vice versa.
Transcoding Using Digital Audio Clock In this configuration, the 2192 is synchronized to the clock signal that is imbedded within the digital audio source signal that is being transcoded. To perform transcoding using the digital audio source clock: 1. Connect the digital output from the external digital audio source device to the desired 2192 digital input using the appropriate digital cable. 2.
Transcoding Using Alternate Clock In this configuration, the 2192 is synchronized to an external clock master. The digital audio source device can be synchronized to the same clock, or to the 2192. To perform transcoding while using an alternate source clock: 1. Connect the digital output from the external digital audio source device to the desired 2192 digital input using the appropriate digital cable. 2.
Diagrams Frequency Response Figure 5: Frequency Response 40
Dynamic Range: A/D Figure 6: A/D Dynamic Range Dynamic Range: D/A Figure 7: D/A Dynamic Range 41
Mastering Setup Figure 8: Typical Mastering Setup Digital Audio Workstation Setup Figure 9: Typical DAW Setup 42
8-Channel Pro Tools Setup Figure 10: Typical Pro Tools HD Setup 43
Index A A/D Using External Clock, 31 A/D Using Internal Clock, 30, 32 AC Line, 12 AC Power Input, 16 AC voltage, 28 AD Converters, 27, 28 ADAT, 9, 14, 18, 23, 25, 27, 28 ADAT Audio, 36 ADAT Clock, 35 ADAT In, 28 ADAT Optical, 12 ADAT Optical Digital I/O, 14, 18 ADC input, 10 AES/EBU, 9, 12, 14, 16, 17, 24, 26, 27, 28 AES/EBU Digital I/O, 16–17 AES/SPDIF, 13, 24, 26, 27, 28 AES/SPDIF Switch, 27 Alternate Clock, 39 Analog, 10 Analog I/O, 18–19 Analog In, 27, 28 Analog Line Inputs, 14, 18 Analog Line Outputs,
P phase, 17 phase aligned, 8 Phase response, 10 power, 16 Power Indicator, 13 Power Lamp, 28 power supply, 9, 16 Power Switch, 13, 28 pre-emphasis, 17 Pro Tools Setup, 43 pushbutton switches, 27 R Rear Panel, 14 Reference level, 10 Residual noise, 11 S S/PDIF, 12 S/PDIF Digital I/O, 14, 17 Safety, 2 Sample Rate, 11 sample rate conversion, 25 Sample Rate Select, 13, 17, 25 Setup, 42, 43 Single/Dual, 16 Single/Dual Selector, 13 Single/Dual Switch, 27, 30 slaving, 17 S-MUX, 18, 33 S–MUX, 27, 30 S-MUX I/O, 9
