Anritsu S331E, Руководство пользователя

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C-2 Glossary Glossary of Terms
C-12 PN: 10580-00252 Rev. K Site Master User Guide
OSLT :
OSLT or Open Short Load Thru calibration method for coaxial line
types. Calibrations standards with known reflection coefficients are
used to calculate the correction factors. Refer to Calibration. Compare
this with SSLT or Offset Short 1, Offset Short 2, Load, Thru calibration
method for waveguide line types.
OTA :
Over The Air (OTA): OTA refers generally to any transfer of information
or signal that takes place in a wireless environment, rather than using
a wired connection. OTA is usually used in connection with a standard
defining the provisioning of mobile devices and applications, such as
downloading or uploading content or software, and commonly used in
conjunction with the Short Messaging Service (SMS). SMS OTA
Messages contain information that is used to configure the settings of a
WAP browser in a mobile phone (refer to SMS and WAP).
RBW :
Resolution Bandwidth (RBW) With spectrum analyzers, a narrow band
filter is swept across a frequency span to create the spectrum display.
The filter bandwidth (RBW) determines the frequency resolution across
the frequency axis.
Remote Access
Point :
Remote Access Point, also known as relay access points, is one of a
number of secondary access points in a wireless network that uses
Wireless Distribution System (WDS) to extend its range. Remote access
points connect to a master access point.
Return Loss :
Power loss in a transmission cable due to mismatch reflection, cable
loss, etc.
RF :
Radio Frequency (RF) is the frequency of radio sine waves. RF generally
refers to wireless communications within a frequency range of 3 kHz to
300 GHz. Formally, according to the Article 2 of the Radio Law, radio
frequency is below 3,000 GHz. Radio frequencies can be used for
communications between a mobile telephone and an antenna mast.
RSSI :
Received Signal Strength Indicator (RSSI) is a measurement of the
power present in a radio signal when received and measured. RSSI is
useful for observing signal strength at a single frequency over time.
SCPI :
Standard Commands for Programmable Instruments (SCPI)