Справочник Пользователя для DCS ANALOGUE TO DIGITAL CONVERTER dCS 904
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.
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.
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 600
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 600
Ω termination from an output with
600
Ω source impedance.
dBV
Level in decibels, referred to a 1.0V rms sine wave,
with no external loading.
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.
replaces kHz which is technically incorrect when
referring to sample rates.
ADC
Analogue to Digital converter, also known as an
A/D
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
Digital converter – used for format conversion and
some