PIM Site Analyzer
α
Manual
© Rosenberger 2017 -
www.rosenberger.com/pia
Page 28 of 54
6.5 DTF
Measuring of the distance to the PIM fault and Return Loss fault position.
The graph plots the PIM and RL value over distance, so even multiple sources
can be detected and level measured. The velocity factor has to be known for
accurate display scaling.
In order to perform DTF measurements the filter needs to be zeroed (PIM and Return
Loss) first. The zeroing must be done only once after a new filter is inserted the first
time (if the filter is changed afterwards the equipment will use the stored value for
this filter created by zeroing) and can only be done on the device, not on the tablet.
6.5.1 Zeroing PIM
At first PIM needs to be zeroed. In the Settings Screen of DTF measurement choose “PIM Location” under
“Measurement Mode”, tick the “Enable” checkbox under “Setting New Zero Point” and apply the settings.
After that, connect the DTF Zeroing adaptor and a Low PIM load at the desired zero-point. To start zeroing
PIM click on “Zero PIM” on the bottom of the DTF measurement screen.
After successful zeroing “PASS” is displayed and with that the zero-point is set. To avoid mistakes in the
following measurements please uncheck the “Enable” checkbox in the DTF settings screen. With that the
“Zero PIM” button on the measurement screen disappears. The zeroing can also be used to set an offset.
