I would greatly appreciate any help in identifying the wideband noise pictured above.
This noise appears at random intervals in multiple c5x up to 2 miles apart. The noise does not appear in all radios at the same time, however, two co-located radios see this noise at the same time.
The noise starts out with a few narrow spikes, then progresses to the above image, with additional spikes added at about 7 second intervals (perhaps the refresh rate of the web page?). The image below represents a midpoint in the progression.
This noise condition does not present itself in SRS mode.