DigiDesign 882/20 Installation Manual Download Page 7 | Manualshive

Page: 7 / 14

DigiDesign 882/20 Installation Manual Download Page 7

Using the 882/20 I/O

3

4. Sample Rate

These LEDs display the current sample rate
of the 882/20 I/O internal crystal oscilla-
tor, which can be either 44.1 kHz or 48
kHz. In Pro Tools, this is set in the Session
Setup window.

The 882/20 I/O provides the following
sample rates:

48 kHz

This is a standard sampling rate of

many professional audio devices. It is rec-
ommended for use with devices that can-
not receive digital transfers at 44.1 kHz.

44.1 kHz

This is the compact disc standard

sampling rate and the Pro Tools default
sample rate. To avoid the need for sample
rate conversion, you should use this rate
when you are recording material that will
ultimately be published on a compact disc.

▲

When you are using an external digital

source such as a DAT recorder, the front panel
of the 882/20 I/O indicates only the internal
oscillator sample rate, not that of the external

digital source.

5. Signal Present LEDs

These LEDs indicate whether signal is
present (above the level of –30 dB) at a
given channel’s output. These LEDs indi-
cate the presence of channel output sig-
nals, not input signals. Input signals are
monitored on-screen in the Pro Tools soft-
ware. The LEDs do not indicate clipping.
Clipping is indicated by the on-screen
meters in Pro Tools software.

882/20 I/O Back Panel

The 882/20 I/O has the following back
panel connectors, moving from left to
right:

1. Analog Audio Inputs

These are balanced, 1/4-inch TRS jacks for
analog audio input connections. The
882/20 I/O analog inputs feature 20-bit an-
alog-to-digital converters.

Input operating levels are switchable be-
tween +4 dBu and –10 dBV operation. Un-
balanced connections are supported with
the use of standard 1/4-inch mono phone
plugs.

Because input channels 1–2 of the
882/20 I/O are software selectable between
analog or S/PDIF digital format, input to
these two analog channels is disabled
when S/PDIF digital input format is chosen
in the Pro Tools Hardware Setup dialog.

The 882/20 I/O analog inputs are factory
calibrated at a –14 dB nominal level, refer-
enced to a full code signal. This means that
at the nominal reference input level (either
+4 dBu or –10 dBV), you have 14 dB of
headroom before clipping.

Back panel of the Digidesign 882/20 I/O

«
...
5
6
7
8
9
...
»

Summary of Contents for 882/20

Page 1: ... fax 650 842 7999 Technical Support USA 650 842 6699 650 856 4275 Product Information 650 842 6602 800 333 2137 Fax on Demand 1 888 USE DIGI 873 3444 World Wide Web www digidesign com Digidesign FTP Site ftp digidesign com Digidesign 882 20 I O Audio Interface Installation Guide ...

Page 2: ... was tested for CISPR compliance under conditions that included the use of peripheral devices and shielded cables and connectors between system components Digidesign recommends the use of shielded cables and connectors between system components to reduce the possibility of causing interference to radios television sets and other electronic devices Safety Statement This equipment has been tested to...

Page 3: ...anel 1 882 20 I O Back Panel 3 Making Signal Connections to the 882 20 I O 5 Choosing between 4 dBu and 10 dBV operation modes 5 Setting Up Your Studio 6 Using the 882 20 I O Interface as Stand Alone Audio Converter 6 Appendix A Technical Specifications 9 A D Specifications 9 D A Specifications 10 ...

Page 4: ...882 20 I O iv ...

Page 5: ...ront and back panels of the 882 20 I O It also ex plains how to use the 888 20 I O with a Digidesign Pro Tools system as well as how to use it as a stand alone 20 bit audio converter in your studio 882 20 I O Interface The following section explains all of the connectors and indicators on the front and back panels of the 882 20 I O Interface and how they are used 882 20 I O Front Panel The 882 20 ...

Page 6: ...roper clock when they are not playing back leaving the 882 20 I O in Digital Sync Mode may cause Pro Tools audio playback quality to suffer or to play back at the wrong pitch If you are using digital I O reset the Sync Mode from Digital to Internal after input ting material Slave This LED is lit when the 882 20 I O sample rate is synchronized to another Digidesign Audio Interface or synchroniza ti...

Page 7: ...output These LEDs indi cate the presence of channel output sig nals not input signals Input signals are monitored on screen in the Pro Tools soft ware The LEDs do not indicate clipping Clipping is indicated by the on screen meters in Pro Tools software 882 20 I O Back Panel The 882 20 I O has the following back panel connectors moving from left to right 1 Analog Audio Inputs These are balanced 1 4...

Page 8: ...faces and synchronization peripherals to gether When the 882 20 I O Sync Mode is set to Internal connecting a valid Slave Clock Out signal to this port will cause the 882 20 I O to automatically switch to Slave mode When the 882 20 I O is the master interface or the first interface in a chain Digital sync mode overrides the Slave Clock input and an incoming Slave Clock Out signal will not switch t...

Page 9: ...odes The 882 20 I O can be set to operate at 4 dBu or 10 dBV input and output lev els It is important that you determine which line level mode is appropriate for your studio In 4 dBu operating mode the 882 20 I O is a 20 bit digital audio de vice capable of producing audio signals at or near 18 dBu Check the owner s man ual for your mixer power amplifier or ef fects processor to see if it can hand...

Page 10: ...d a word clock signal to the 882 20 I O S PDIF digital input 2 Turn on the 882 20 I O The 882 20 I O searches briefly for a word clock signal on channels 1 2 of its digital input ports 3 If the 882 20 I O does not detect word clock it functions as a stand alone A D converter using its internal clock In this mode you will use analog inputs 1 2 and the S PDIF output A typical studio configuration wi...

Page 11: ...signal is connected to the S PDIF input of the 882 20 I O and that the device is powered on 2 Turn on the 882 20 I O The 882 20 I O will search for a valid word clock on its S PDIF input 3 When a valid word clock lock is recog nized the 882 20 I O will enter digital sync mode and function as a stand alone D A converter using the S PDIF input and analog outputs 1 2 The 882 20 I O sample rate is det...

Page 12: ...882 20 I O 8 ...

Page 13: ...k 256x sample clock In Out BNC connectors additional clock refer ences supported via Digidesign s Universal Slave Driver SMPTE Slave Driver Video Slave Driver and other optional synchro nizers Nominal Operating Level 4dBu factory calibrated at 14dB headroom A D Specifications 20 bit A D converters Delta Sigma SNR signal to noise ratio 103dB balanced A weighted 100dB unweighted 22Hz 22kHz THD 0 003...

Page 14: ...weighted THD 0 003 1dB 1kHz 22 Hz 22 kHz Maximum Output in 4 dBu mode 18 dBu channel or 6 15V RMS Frequency Response 22 Hz 22 kHz 0 5dB Physical Specifications Power requirements 85 264 VAC 47 63 Hz 30 VA auto switching Weight 4 8 lbs 2 2 kg Dimensions 1U external rackmount device 19 x 1 75 x 7 5 48 26 cm x 4 4 5 cm x 24 77 cm ...

Reviews:

No comments