DTX Series CableAnalyzer
Technical Reference Handbook
iv
Autotest on Twisted Pair Cabling ....................................................................................................................3-6
Twisted Pair Autotest Results ..........................................................................................................................3-9
Automatic Diagnostics ................................................................................................................................3-11
PASS*/FAIL* Results .....................................................................................................................................3-12
Wire Map ....................................................................................................................................................3-13
Resistance ....................................................................................................................................................3-15
Characteristic Impedance ...........................................................................................................................3-16
Length ..........................................................................................................................................................3-17
Propagation Delay and Delay Skew ...........................................................................................................3-18
Insertion Loss ...............................................................................................................................................3-19
NEXT (Near-End Crosstalk) ..........................................................................................................................3-21
ACR (Attenuation to Crosstalk Ratio) ........................................................................................................3-23
Return Loss ..................................................................................................................................................3-25
PSNEXT (Power Sum Near End Crosstalk) Test ..........................................................................................3-27
PSACR (Power Sum Attenuation to Crosstalk Ratio) Test .........................................................................3-27
ELFEXT (Equal Level Far-End Crosstalk) Test ..............................................................................................3-28
PSELFEXT Test ..............................................................................................................................................3-31
Running Single Tests ........................................................................................................................................3-31
Monitoring Impulse Noise ...............................................................................................................................3-33
Using the Tone Generator ...............................................................................................................................3-36
4 Testing Twisted Pair Through a PoE Device
Enabling the AC Wire Map Test ......................................................................................................................4-1
Autotest Through a PoE Device .......................................................................................................................4-1
AC Wire Map Results ........................................................................................................................................4-4
Running the AC Wire Map Test as a Single Test ............................................................................................4-7
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