A Noise Floor measurement tests for Rx interferers that can effect PIM measurements. In a Noise Floor measurement, Tx power is Off. This allows you to check for external interference at the IM frequency being measured. This measurement displays 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. Refer to Noise Floor Measurement.
Trace Mode
Two trace modes are available to optimize performance. They are based on the type of measurement being conducted. The instrument settings summary displays the Trace Mode setting.
Fast mode is available for dynamic PIM testing, in which maximum responsiveness is desired. New data points are reported to the user approximately eight times per second to provide rapid feedback during dynamic impacts.
Low Noise mode is available to increase accuracy for low signal level measurements. This mode increases the number of samples collected by a factor of five for each reported data point. Noise variation is distributed over a larger number of samples, which results in reduced peak‑to‑peak variation for low signal level measurements.
Fast and Low Noise Trace Modes
PIM vs. Time Measurement Setup
Before performing a PIM vs. Time measurement, the PIM Master must be calibrated (refer to section Calibrating).
1. Turn on the PIM Master.
2. Connect the DUT to the test port connector of the PIM Master.
Warning
Confirm that connections are secure. High power RF signals are emitted from the test port and can cause bodily injury. Anritsu recommends using a torque wrench for this connection. The torque wrench is included in the PIM accessory kit (refer to your Technical Data Sheet for part numbers).
This device (DUT) may be the main feeder cable from the tower or a simple jumper cable. The DUT must be connected to a termination device, such as a low PIM termination or an Antenna.
Caution
Do not use a precision load as the termination device because they are not designed to handle the power of the PIM Master and will become damaged immediately.
