Indexes And Software Version Numbers; Definitions Of Units; Abbreviations Used - DCS 992 User Manual

dCS 992 User Manual
dCS Ltd
I S
NDEXES AND OFTWARE

Definitions of Units

Abbreviations Used

Manual part no: DOC063992 iss 2A1
Contact on + 44 1799 531 999
dCS
(inside the UK replace + 44 with 0)
V
ERSION
This manual is for software version 2.0x.
V2.0x versions differ from version 1.0x in having:
•
multiple clock generators, for multiple sample rate operations,
•
Sync link capability
•
"Learn" mode,
•
many Superclock options
•
enhanced TCXO control.
dB0
dBu
dBV
kS/s
ADC
DAC
DDC
GPS
TCXO
VCXO
N
UMBERS
Level in decibels, referred to a full scale sine wave
in a sampled system. So, 0 dB0 is full scale.
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.
Level in decibels, referred to a 1.0V rms sine wave,
with no external loading.
Sample rate in kilo-samples per second. This
replaces kHz which is technically incorrect when
referring to sample rates.
Analogue to Digital converter, also known as an
A/D.
Digital to Analogue converter, also known as a D/A.
Digital to Digital converter – used for format
conversion and some DSP operations that change
the data.
Global Positioning System.
Temperature Compensated Crystal Oscillator.
Voltage Controlled Crystal Oscillator.
Page 70
Manual for Software Version 2.0x
January 2001
file 063992ma2a1.pdf available from website
email to: more@dcsltd.co.uk
web site: www.dcsltd.co.uk