dCS 900E / 902E User Manual Manual for Software Versions 1.3x to 1.5x
dCS Ltd 12
th
June 2000
Manual part no: DOC0029021E1 Page 62 Document No: OS-MA-D0002-902.1E1
Contact dCS on + 44 1799 531 999 email to: more@dcsltd.co.uk
(inside the UK replace + 44 with 0) web site: www.dcsltd.co.uk
INDEXES AND SOFTWARE VERSION NUMBERS
This manual is for software versions 1.3x to1.5x.
v1.3x changes: Word Clock & AES Reference synchronisation improved.
v1.5x changes: 904 related enhancements and hardware harmonisation.
v1.5x versions differ only in a few minor bug fixes.
Definitions of Units
dB A relative level in decibels. The context should
state the reference level.
dB0 Level in decibels, referred to a full scale sine wave
in a sampled system. So, 0 dB0 is full scale.
dBu Level in decibels, referred to a 0.775V rms sine
wave, with no external loading (u = unloaded).
The level of 0.775V is derived from the older dBm,
for which the reference level is 1mW of signal
power into a 600Ω termination from an output with
600Ω source impedance.
dBV Level in decibels, referred to a 1.0V rms sine wave,
with no external loading.
kS/s Sample rate in kilo-samples per second. This
replaces kHz which is technically incorrect when
referring to sample rates.
ADC Analogue to Digital Converter. Sometimes referred
to as an A/D Converter.
DAC Digital to Analogue Converter. Sometimes referred
to as a D/A Converter.
DDC Digital to Digital Converter. Sometimes referred to
as a D/D Converter.
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