Glossary: Frequently used Terms and Abbreviations
R&S
®
OSP
324
User Manual 1178.7100.02 ─ 05
SMA:
Subminiature coaxial RF connector, version A (standard)
SPDT:
Single pole double throw: a changeover switch with the common line (C) con-
nected to the NC (normally closed) port in the deactivated state, and to the NO (nor-
mally open) port in the activated state
SPxT:
Single pole x-fold throw, a multi-terminal switch (typically a drum switch): Its
common line (C) is not connected to any terminal port in the deactivated state, and to
one of the x terminal ports in an activated state.
Switchable item:
R&S
OSP modules can contain a broad range of "switchable items":
Most standard modules have relays and output channels as their switchable items.
Special modules for system applications also can have step attenuators, phase shift-
ers, amplifiers and modulators. Switchable items can also be read. On the contrary,
non-switchable but "readable items" are input channels, interlocks and sensors.
T
TCP/IP:
Transmission control protocol / Internet protocol, a set of widely used network-
ing protocols that provides communications across interconnected networks of comput-
ers with diverse hardware architectures and various operating systems. TCP/IP
includes standards for computer communication and conventions for connecting net-
works and routing traffic.
TFT:
Thin-foil transistor (used for displays)
TVS:
Transient-voltage suppression, typically achieved with unidirectional or bidirec-
tional diodes that can handle large peak currents.
U
USB:
Universal serial bus, industrial connector standard
W
WebGUI:
Web-based graphical user interface, the instrument's dialogs in a browser
window
WVGA:
Wide video graphics array, a standard display resolution of 800 x 480 pixels
