Anritsu Site Master - Making Distance-Domain Measurements; Selecting a Frequency Range

Making Distance-Domain Measurements
Distance domain measurements—commonly known as distance-to-
fault (DTF)—are made over a selectable distance range. They return in-
formation that can help locate discontinuities in a transmission line.
Selecting a Frequency Range
NOTE FOR COAX:
The maximum distance range is determined by the
frequency span, number of data points, and relative
propagation velocity:
Maximum Unaliased Range meters
V
F
f
()
(. )( )( )
=
·15 10 128
2
8
- F 1
Where: F1 is start frequency (in Hz)
F2 is stop frequency (in Hz)
Vf is relative propagation velocity
NOTE FOR WAVEGUIDE:
The maximum distance range is determined by the
frequency span, number of data points, and group ve-
locity:
Maximum Unaliased Range meters
V
F
G
()
(. )( )( )
=
·15 10 128
2
8
- F 1
Where: F1 is start frequency (in Hz)
F2 is stop frequency (in Hz)
VG is group velocity
V
G
F
F
C
=-1
1
2
()
FC is cutoff frequency (in Hz)
Step 1.
Press the MODE soft key, from the Main Menu
(page 2-8).
Step 2. Select DTF-SWR or Return Loss measurement using
the Up/Down Arrow key (Figure 2-1, page 2-0).
Press ENTER when selection is complete.
2-41
Chapter 2 Operation