Glossary: List of the Often Used Terms and Abbreviations
R&S
®
SMBV100B
988
User Manual 1178.4460.02 ─ 03
star configuration:
A connection scheme for several instruments that consists of one
central instrument and several other instruments, all connected to the central one.
Stream:
An I/Q stream describes the signal at the input of the "I/Q Stream Mapper" up
to the output connectors of the instrument.
Symbol Clock:
Represents the frequency and exact timing of the transmission of the
individual symbols
Symbol Rate:
Calculated as follows:
"Symbol Rate" = "Bit Rate" / Number of bits transmitted with each symbol
Sync signal:
mode, this term describes the signal generated by the
master instrument and fed to the slaved.
The synchronization signal is precise signal that facilitates the time alignment between
the instruments and acts as trigger signal.
System drive:
The system drive is a
μ
SD card that holds the operating system, the
firmware, and the user data.
Throughout this description, the system drive is referred as an internal memory.
T
Trigger:
Internally generated or externally supplied signal which starts signal genera-
tion at a particular point in time.
Trigger event:
A trigger event is caused by the received trigger signal or executed
manual trigger.
U
UE:
User equipment
USBTMC:
(USB Test & Measurement Class)
A protocol built on top of USB for communication with USB devices. Using VISA library,
it supports service request, triggers, and other specific operations, similar to GPIB.
User directory:
Describes the default file storage location for user data.
In the file system, user directory is indicated as
/var/user/
It is physically located on the internal memory or on the
R&S
SMBVB-B80 is installed.
W
Waveform:
A file with settings provided for repeatable tests with the same test signal.
