User Guide

dCS Elgar Plus User Manual Manual for Software Issue 4.3x
dCS Ltd September 2004
Manual filename: Elgar Manual v4.3x.doc Page 35 email: [e-mail]
English version web-site: www.dcsltd.co.uk
Display button (Menu Step)
The Display button controls the brightness of the Main display (G) and the
green LEDs above the buttons. When it is pressed for the first time, the display
indicates the present brightness setting in the form Bright x, where x is a
number from 7 (maximum brightness) through to 0 (display off). Successive
button presses will cause the main display to cycle through the following
sequence, getting dimmer with each press:
Bright 7, Bright 6, ....., Bright 1, Bright 0, Bright 7, etc.
The green LEDs are dimmed for settings below Bright 4.
After a few seconds, a setting of Bright 0 blanks the Main display unless the
unit is not locked to a digital source. The green LED above the Display button
indicates that the Main display has been turned off. Operating any control or
locking to a source while in this mode causes the Main display to turn on
momentarily so you can see what Elgar Plus is doing.
The Display button doubles as the Function Menu
Step button – see page 19
for details.
Phase button x
do this: If you need to correct a phase error on both channels, press the Phase button
to reverse the phase of the Analogue Outputs.
The LED above the Phase button will light to indicate this and the Main display
will briefly show Inverted.
do this: Press the Phase button again to restore correct phase. The Main display will
briefly show Normal.
De-Emphasis button x
Recording with 50/15µs high frequency emphasis is a hangover from the days
of recording onto noisy magnetic tapes. To combat tape hiss, the high
frequency part of the music was recorded at a higher level (pre-emphasis). The
high frequency response was corrected at playback by a de-emphasis filter,
reducing the hiss level as well.
Some early CDs were recorded with emphasis, but more recent disks have a
flat frequency response. The emphasis used is recorded in message flags,
encoded into the data stream. On some disks, these flags are incorrect,
resulting in a bumpy frequency response. Elgar Plus can apply de-emphasis for
PCM sources with sample rates of 32, 44.1 or 48kS/s - it is not used at higher
sample rates.
CCITT emphasis is used in digital radio transmissions.
do this: Press the De-Emphasis button repeatedly and the Main display will cycle
through the options: