dCS Elgar Plus User Manual Manual for Software Issue 4.3x
dCS Ltd August 2005
Manual filename: Elgar Manual v4.4x.doc Page 40 email: more@dcsltd.co.uk
English version web-site: www.dcsltd.co.uk
REC Digital Output
The REC output buffers and loops through the selected single wire input data
with sample rates up to 96kS/s. The data format is the same as the selected
input (i.e. AES3 or IEC60958), the electrical format is SPDIF. It may be
connected to a digital recorder or another DAC. Use with 75 ohm co-axial
cables designed for digital audio or RF use.
IMPORTANT! This output is intended for use with Single AES, RCA, BNC, Toslink or ST
inputs ONLY. If the selected input is in any other format, the REC output
will carry either the left channel data or full scale noise.
IMPORTANT! If the selected input is SPDIF and the Copy Prohibit flag in the source data is
set, the REC output will be the same and you will not be able to record the
data.
1394 Interface
Units fitted with an IEEE 1394 multi-channel interface feature two 6-way 1394
connectors. The active source is selected by the Input button, see page 37.
In this release, the unit accepts DSD data at 2.822MS/s from either 1394
connector. For correct operation, the source must generate a 44.1kHz
wordclock (or be locked to a master clock running at 44.1kHz) and this must be
connected to Elgar Plus’ Wordclock In connector. We recommend using the
1.8 metre long, 6-way IEEE 1394 cable assembly and the BNC cable assembly
provided. See the “IEEE 1394 Overview” section on page 48 for more
information.
DSD / SDIF Interface
This consists of two data inputs, CH1 & CH2 and the Wordclock Input, all on
BNC sockets. When a DSD or SDIF-2 data stream is connected and selected
using the Input button, Elgar Plus locks to the Wordclock Input, analyses the
waveforms on the data inputs and automatically selects DSD or SDIF-2
operation. The DSD or SDIF indicator lights up as appropriate. As DSD mode is
fundamentally different to PCM mode, Elgar Plus will take several seconds to
load the necessary software.
The DSD interface accepts single bit data at 2.822MS/s with a 44.1kS/s
Wordclock.
The SDIF-2 interface accepts sample rates from 32 to 96kS/s and requires a
Wordclock.
Connect up the three BNC sockets with 75Ω co-axial cables designed for digital
audio or RF use.
IMPORTANT! Please ensure the 3 cables are correctly connected to the source, otherwise
the interface may malfunction or the channels may be swapped.
The Wordclock Input may be used with a Master Clock to synchronise other
components in your system, connected to Elgar Plus’ other inputs.
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