dCS 954 User Manual Manual for Standard Software Version 1.5x
dCS Ltd June 2000
Manual part no: DOC136954 iss 2B1
Page 81
file 135954ma2b1.pdf available from website
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I
NDEXES AND
S
OFTWARE
V
ERSION
N
UMBERS
This manual is for standard software version 1.5x and P3D unit software v1.36.
v1.5x differs from earlier standard software v1.3x and P3D software pre 1.36 in
having a more friendly menu structure, with readback on current settings without
having to change the settings, and supporting SDIF-3 for DSD.
Definitions of Units
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, also known as an
A/D
DAC Digital to Analogue converter, also known as a D/A
DDC Digital to Digital converter – used for format
conversion and some DSP operations that change
the data.
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