Automatically detecting in-band but out-of-span power in a frequency-domain test and measurement instrument

摘要

A test and measurement instrument according to an embodiment of the present invention automatically detects excessive in-band but out-of-span energy and notifies the user of the condition.

主权项

1. A test and measurement instrument comprising:
an analog-to-digital converter configured to digitize an input signal to produce digital data; a frequency transform configured to transform the digital data into a frequency spectrum having in-span power and out-of-span power; a detector configured to detect an out-of-span power condition by comparing the out-of-span power to an out-of-span power condition parameter; and means for notifying the user of the detected out-of-span power condition.