Agilent Technologies ESA-E Series, Руководство пользователя

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18 Chapter 3
Making Measurements
Making Cable Fault Measurements
Figure 3-1 Calibrating for Cable Fault Location
* 50 ohm only. The 6 dB attenuators may be used to improve impedance matching.
** 75 ohm only.
NOTE
The distance-to-fault accessory kit, Option B7K, has all the 50 ohm accessories
required to make these measurements.
Table 3-1 on page 17 lists the cables and
accessories required for 50 ohm and 75 ohm measurements.
2. Configure the spectrum analyzer for the appropriate cable type.
a. Press the
Cable Type
menu key, and observe the Cable Type Selection
Screen as shown in Figure 3-2 .
b. Page through available cable types using the Tab , RPG , or Step keys.
c. Press the Select menu key to select the appropriate cable type.
d. If you don’t see your particular cable type listed, you can modify one of the
“Custom” cables at the end of the cable type list. You will need to know the
Velocity Factor
and
Cable Loss per Metre
data for your
cable:
1. Select one of the unused Custom cables.
2. Press
Vel Factor
3. Key in the value
4. Press
Enter
5. Press Cable Loss /m
6. Key in the value (dB).
7. Press
Enter
.
8. Press
Store Table
to save the changes.