2019-06-03 V1 Gen1 TMF2 ON-OFF

Here's the scenario:
2018 Honda Accord parked in my driveway. Metal garage door in front of me. Metal drainage grate behind me. I get my own brief BSM signals sometimes when I park. No other active cars around for 1/2 a mile or more.
Notice the erratic blue line for the alerts. That's the frequency changing constantly and it's one of the reasons why BSM is so difficult to filter out. A regular signal shows a straight blue line instead.