HP Cell Phone Accessories E6380-90019 Manuel D’Utilisation
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Chapter 3
63
Overview of the Test Set’s Built-In Tools
Using RF Tools Program
Selecting Cable Type
In the menu for this test, you can enter the following information:
• Cable length
• Cable length units
• Pressing the knob toggles the selection between feet and meters.
• Cable class
• Pressing the knob allows selection of Heliax, RG, and custom
options.
• The next menu varies depending on the selection for cable class:
• If
Custom
is selected, you can enter the cable’s velocity of
propagation constant and attenuation per 100 feet (or meters).
The propagation velocity must be a value between 0 and 1.
The propagation velocity must be a value between 0 and 1.
• If
RG
is selected, you can enter the cable type with the example
[RG 58/U = 58]. You must enter a value between 0 and 1000.
• If
Heliax
is selected, you can enter the cable type. A list of
choices (foam, air, and flex of varying thickness) is displayed. Use
the knob to select the desired cable type.
the knob to select the desired cable type.
• Press
k1
(or select
Begin Test
) when all the appropriate entries
have been made.
• Connect the cables as instructed, and press
k1
(
Proceed
).
Velocity factors and attenuation. Cables that use polyethylene
dielectric typically have a propagation velocity of 0.66, cables that use a
teflon dielectric typically have a propagation velocity of 0.70. If the
cable attenuation is unknown, enter 0 dB per 100 feet (or meters).
Entering 0 dB/100 will produce return loss values lower than actual,
but fault distance can be accurately detected.
dielectric typically have a propagation velocity of 0.66, cables that use a
teflon dielectric typically have a propagation velocity of 0.70. If the
cable attenuation is unknown, enter 0 dB per 100 feet (or meters).
Entering 0 dB/100 will produce return loss values lower than actual,
but fault distance can be accurately detected.
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