Cable and Antenna Analyzer 2-6 Line Sweep Measurements
Cable & Antenna Analyzer MG PN: 10580-00241 Rev. B 2-19
Fault Resolution
Fault resolution is the system's ability to separate two closely spaced discontinuities. If the
fault resolution is 10 feet and there are two faults 5 feet apart, the instrument will not be able
to show both faults unless Fault Resolution is improved by widening the frequency span.
Fault Resolution (m) = 1.5 x 10
8
xvp/ΔF
DMax
DMax is the maximum horizontal distance that can be analyzed. The Stop Distance can not
exceed Dmax. If the cable is longer than Dmax, Dmax needs to be improved by increasing the
number of data points or lowering the frequency span (ΔF). Note that the data points can be
set to 137, 275, 551, 1102, or 2204
Dmax = (Datapoints – 1) x Fault Resolution
DTF Setup
1. Press the Measurements main menu key and select DTF Return Loss or DTF VSWR.
2. Press the Freq/Dist main menu key.
3. Press the Units submenu key and select m to display distance in meters or ft to display
distance in feet.
4. Press DTF Aid and use the touch screen, or arrow keys to navigate through all the DTF
parameters.
a. Set Start Distance and Stop Distance. Stop Distance needs to be smaller than
Dmax.
b. Enter the Start and Stop frequencies.
c. Press Cable and select the appropriate cable from the cable list (Figure 2-13).
d. Press Continue.
5. Press Shift and Calibrate (2) to calibrate the instrument. See Chapter 3, “Calibration”
for details.
6. Press the Marker main menu key and set the appropriate markers as described in
“Markers” on page 2-9.
7. Press Shift and Limit (6) to enter and set the limits as described in “Limit Lines”
on page 2-7.
8. Press Shift and File (7) to save the measurement. See the User Guide for details.
Note If Stop Distance is greater than DMax, increase the number of data points.
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