Chapter 10 Distance to Fault Operation
Distance to fault calibration
168 9102 Handheld Spectrum Analyzer Software version 5.31
4 Push the Span softkey. If you intend to set the span manually, enter
the frequency for the range from the left to the right end of the
display. If you want the span to be set automatically, toggle the
Span softkey to auto.
Distance to fault calibration
Before starting the measurement the instrument needs to be calibrated
with a reference match resistor. For details on available calibration sets
refer to “Options and accessories” on page 5 and “Calibration” on
page 142. On the left-hand side of the results display a red icon
reading “Calibrate“ informs you that a calibration needs to be
performed.
In order to calibrate the instrument for your distance-to-fault measure-
ment proceed as follows:
1 Connect the test port extension cable to the 9160 VSWR/DTF
Bridge.
2 In the Distance to Fault main menu press
DTF Cal. softkey. The
distance to fault Calibration menu is displayed.
NOTE
If you specify the same value for the center frequency as for the
cable cutoff frequency, your measurement becomes invalid as the
cutoff frequency is the maximum frequency up to which the cable
transmitts signals. In this case the measurement would not make any
sense. For details on specifying the cable cutoff frequency refer to
“Specifying cable settings” on page 166.
NOTE
To ensure that the calibration results in better rather than worse
measurement accuracy, it is important that you know and enter the
correct cable parameters for the cable between the instrument and
the calibration set. See Table 15 for the parameters of cables deliv-
ered by Aeroflex for this purpose.
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