Fluke DSP-100 User Manual page 70

DSP-100/2000
Users Manual
Resistance
The resistance test measures the loop resistance of the cable and the terminator. If
a terminator is not connected or if the cable is open, the resistance value is
reported as
reported as near 0 . Resistance values over 400 are reported as
Length
Because a cable terminator eliminates signal reflections in coaxial
cable, the test tool cannot measure the length of a terminated
coaxial cable.
The length test measures the length of the cable when a terminator is not
connected. If a terminator is connected, the result of the length test is reported as
A
selected test standard. A
limit.
Differences between measured and actual values of cable length can
be caused by variations in the cable's NVP value. To ensure
maximum accuracy of length measurements, perform an NVP
calibration as described in Chapter 6.
The length test limits include an extra 10% to account for variations
in NVP.
Anomaly
This result is shown at the bottom of the screen only if an impedance anomaly is
detected. The test tool reports an anomaly if 10% or more of the test signal is
reflected. The result shows the distance to the largest anomaly detected.
3-22
. If the cable or the terminator is shorted, the resistance value is
.
result means that the measured length is within the limit specified by the
Note
result means that the measured length exceeds the
Notes
.