Chapter 10 Distance to Fault Operation
Setting center frequency and span
9102 Handheld Spectrum Analyzer Software version 5.31
167
2 Press the Recall Cable Type softkey. A dropdown list containing all
cable types stored on the system is displayed.
3 Select the required cable type using the U
P/DOWN arrow keys and
press E
NTER. The settings of the selected cable type are now auto-
matically used for the DTF measurement.
Specifying parameters
step by step
For measurements on rare cable types the parameters can be set up
via the Cable Setting menu. For the values to be entered refer to the
manufactuer’s information for the cable to be measured. In order to
manually specify the cable parameters proceed as follows:
1 In the Distance to Fault main menu select
Cable > Cable Setting.
The Cable Setting menu is displayed.
2 To specify the dielectric of the cable to be measured, which is
linked to the velocity factor, press the
Cable Dielec. softkey. The
Cable Dielectric input field is displayed. Enter the cable dielectric
and press E
NTER.
3 To specify the propagation velocity of the cable to be measured,
which is in turn linked to the dielectric, press the
Cable Velocity
Factor
softkey. The Cable Velocity Factor input field is displayed.
Enter the velocity factor and press E
NTER.
4 To specify the cable’s cut off frequency in GHz, which is the
maximum frequency up to which the cable transmitts, press the
Cut Off Freq. softkey. The Cut Off Frequency input field is displayed.
Enter the frequency and press E
NTER.
5 To specify the cable attenuation in dBm per 100m or dBm per 100
ft at
1 GHz of the cable to be measured press the
Cable Attn. softkey.
This softkey can be toggled between dB/100m and dB/100 ft.
After pressing the softkey the Cable Attenuation input field will be
displayed accordingly. Enter the attenuation and press
Enter.
Setting center frequency and span
1 Push the CENT function key or the Center softkey in the Distance to
Fault main menu.
The vertical softkeys include Center and Span. An entry field
appears, indicating the center frequency currently set and the step
size for the up/down cursor keys.
2 Enter a new frequency using the numeric keys, the cursor keys and
the B
ACKSPACE key.
3 Conclude the entry by pushing an enter key for the unit (GH
Z/DBM
for gigahertz, MH
Z/DB/ΜS for megahertz, KHZ/DBΜV/MS for kilo-
hertz, or E
NTER for hertz).
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