User Manual

฀ ฀
฀ Qualifying฀Cabling฀with฀the฀Autotest฀฀ ฀
35฀
avv42.bmp฀
฀
avv45.bmp฀
The฀cabling฀failed฀the฀Autotest฀because฀it฀
is฀shorted.฀The฀short฀is฀at฀82.9฀m฀in฀this฀
example.฀
Note฀
Devices฀with฀low฀input฀resistance฀
may฀be฀reported฀as฀a฀short.
฀
There฀is฀a฀splitter฀or฀fault฀somewhere฀along฀the฀cabling.฀Faults฀that฀typically฀
cause฀this฀message฀are฀impedance฀faults,฀such฀as฀a฀section฀of฀cable฀with฀the฀
wrong฀impedance.฀฀
If฀there฀is฀a฀splitter฀between฀the฀tester฀and฀wiremap฀adapter,฀the฀tester฀
cannot฀verify฀continuity฀to฀the฀adapter,฀and฀may฀indicate฀that฀a฀device฀is฀
connected.฀฀
Length฀cannot฀be฀determined฀because฀the฀splitter฀or฀fault฀interferes฀with฀
reflections฀used฀for฀length฀measurements.฀
Tip:฀Use฀the฀TDR฀plot฀in฀Discover฀mode฀to฀locate฀impedance฀problems฀on฀
coaxial฀cabling.฀See฀page฀44.฀
The฀Splitter฀or฀Fault฀message฀may฀also฀appear฀on฀the฀other฀coaxial฀screens฀
described฀in฀this฀section.฀
-continued-฀
Figure฀14.฀Autotest฀Results฀for฀Coaxial฀Cabling฀(cont.)฀