PIM Master™ Passive Intermodulation Analyzer : Noise Floor Measurement : Noise Floor Measurements
  
Noise Floor Measurements
Noise Floor measurements display the signal level that is received by the PIM Master at the IM product frequency as a function of time with TX1 and TX2 turned Off.
The Noise Floor Measurement in Figure: Typical Noise Floor (No External Interference, No Limit Line) shows no external interference. A typical noise floor is approximately –130 dBm. After verifying that no interference is present, begin PIM testing. Note that units of dBc are not applicable to Noise Floor measurements.
Noise Floor Measurement with No External Interference
Typical Noise Floor (No External Interference, No Limit Line)
 
External Interference Example
In the example shown in Figure: Noise Floor Measurement with External Interference external interference is seen in the failing measurement trace, which exceeded the set limit.
Noise Floor Measurement with External Interference
Resolve this external interference before further PIM testing.
Saving a Noise Floor Measurement
To save a Noise Floor measurement, press Shift and File (7), then press the Save or the Save Measurement submenu key. Refer to File Management for Save menu and Save dialog box directions.