Anritsu Site Master S330A, Руководство пользователя, Страница: 38 / 85

then subtracted from subsequent measurements
prior to display.
q MAIN
— Returns to the Main Menu.
Remote Operation
All Site Master functions, settings, and operating modes (except for
power on/off) are controllable using commands sent from an external
computer via the serial port. A detailed description of the programming
commands is available in the Site Master Programming Manual, P/N
10580-00010.
Operating Procedures
Site Master operation is divided into four functional areas: common
functions, frequency domain, distance domain, and power monitor.
•
Common functions are options and scale functions that are
common to both frequency- and distance-domain measure-
ments.
•
Frequency domain measurements consist of Return Loss (RL),
Standing Wave Ratio (SWR), and Cable Loss (CL) made over
a selectable frequency range. RL and SWR characterize the
magnitude of reflections present in a device or transmission
line. CL measurements display the insertion loss of a transmis-
sion line over frequency.
•
Distance domain measurements—commonly known as
distance-to-fault (DTF)—are made over a selectable distance
range. They include RL or SWR, but they also return informa-
tion that can help locate discontinuities in a transmission line.
CL cannot be measured in the distance domain.
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Chapter 2 Operation