This message occurs when the connection to the test port produces large reflections back into the instrument. This can compromise measurement accuracy. To fix this error, check all junction connections, or remove the RF connection or component that is causing the high reflection. The automatic Distance-to-Fault (DTF) function performed before each Distance-to-PIM (DTP) test mode can be used to help determine the location of the high reflection. An option will be presented allowing the user to continue PIM testing even in the presence of a high reflection. This should only be used by experienced users for troubleshooting purposes as the measured PIM value may not be accurate. A warning will appear in large letters on the screen any time that the high reflection warning has been by-passed.
PIM Analyzer Warning Messages
Warning messages provide information but allow measurements to continue.
RF PLL Lock Error REF PLL Lock Error
These indicate a potential hardware failure that could compromise measurements. If the failure persists, contact your Anritsu Service Center.
Invalid Parameter Entry
If an invalid F1 or F2 frequency is entered, the instrument will display a warning message describing the acceptable range for the frequency carrier. If the IMx frequency does not fall within one of these bands, then the PIM Master produces an audible tone. In addition to the beep, the instrument will display a message on the screen indicating the allowed IM range. Also, the IM Frequency text in the PIM Summary area will turn red.
PIM AMP(S) Exceeding Normal Temperature Range
The PIM Master internal amplifiers have exceeded their normal temperature range.
PIM UNIT Exceeding Normal Temperature Range
The entire PIM Master unit is beyond the normal temperature range and degradation in measurement or signal dropout can occur.
PIM EEPROM Error
Can not access on‑board EEPROM. Measurement results may be invalid.
IM OVERLOAD
This is a warning message that the measured signal level is approaching the saturation limit of the instrument. The actual signal level may be higher than the reported signal level under this condition. IM Overload is displayed in PIM vs. Time and Swept PIM measurement modes if PIM values exceed this saturation limit.
Receiver Amplitude Low
This message can occur if signal amplitude degrades within the instrument. It can have an impact on overall measurement accuracy and should be an indicator to send the unit to the Anritsu Service Center for repair.
High PIM Detected
This is a warning message presented during calibration if a high PIM level is detected before the step requiring a low PIM Load to be attached.