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dCS 904 User Manual Manual for Software Version 1.5x and 1.36
dCS Ltd June 2000
Manual part no: DOC135904 iss 2B2
Page 79
135904ma2b2.pdf file available from website
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
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 v1.3x in having substantially improved DSD modulators, and
in having a more friendly menu structure, with readback on current settings
without having to change the settings.
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 DSP operations that change the data. Digital to
Digital converter – used for format conversion and
some