Operating Procedures
Site Master operation can be divided into four functional areas: com-
mon functions, frequency domain, distance domain, and power moni-
tor.
•
Common functions are calibration, options, markers, and scale
functions that are common to both frequency- and distance-
domain measurements.
•
Frequency domain measurements consist of Standing Wave
Ratio (SWR), Return Loss (RL), and Coax/Waveguide Loss
(CWL) made over a selectable frequency range. SWR and RL
characterize the magnitude of reflections present in a device or
transmission line. CWL measurements display the insertion
loss of a coaxial or a waveguide transmission line over fre-
quency.
• 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.
CWL cannot be measured and Trace Math function is inopera-
tive in the distance domain.
•
Power monitor measurements can be either absolute or rela-
tive to some base power level, and can be displayed in either
dBm or Watts. To allow measurement and display of power
levels above the unit’s specified input, the user may attenuate
the signal and enter the corresponding offset. The offset is
added to the measured input power prior to display. Finally, a
zero adjust function is provided to allow substraction of an in-
herent “noise” level prior to display.
2-24
Chapter 2 Operation
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