Multi LAN 350
Operation
37
Return Loss plot screen
5.3.7 Attenuation
Attenuation is the measured loss of signal strength in a pair from one cable end to the
other. It increases with frequency and cable length so it has to be measured over the
complete frequency range. Attenuation is one of the main cable parameters that
dramatically influences the maximum bit rate of data stream allowed. The main result is
given as the worst case value in dB.
Test procedure:
Make sure that the Remote unit is connected on the other end of the cable.
Select and start the Attenuation test. After the Remote unit is connected and the test is
completed, all four attenuation results and an overall Pass/Fail decision are shown on
the display. The following actions can now be performed:
ESC key:
return to Single Test main screen
TEST:
repeat the test.
PLOT:
select Attenuation Plot screen
WORST:
Select worst case result screen
Attenuation worst case result screen
Note:
The Attenuation measurement can't be performed without the remote unit.
Attenuation PLOT screen
After entering this screen individual or all Attenuation (frequency) plots together with the
test standard limit curve are shown on the display. Margin and result at the cursor
position are displayed under the graph.
