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I've noticed that at the trail of some transmissions, the LDUs will contain a repeated number of packets with invalid fundamental frequencies. The source of these tend to always be dispatch consoles. Any idea what they might be, if anything?

Code: 
03/14/23 20:35:46.823878 [0] IMBE fc 00 00 00 00 00 00 00 00 00 00 errs 15 SRC: 126753
03/14/23 20:35:46.824420 [0] IMBE fc 00 00 00 00 00 00 00 00 00 00 errs 15 SRC: 126753
03/14/23 20:35:46.824948 [0] IMBE fc 00 00 00 00 00 00 00 00 00 00 errs 15 SRC: 126753
03/14/23 20:35:46.825467 [0] IMBE fc 00 00 00 00 00 00 00 00 00 00 errs 15 SRC: 126753
03/14/23 20:35:46.826263 [0] IMBE fc 00 00 00 00 00 00 00 00 00 00 errs 15 SRC: 126753
03/14/23 20:35:46.827073 [0] IMBE fc 00 00 00 00 00 00 00 00 00 00 errs 15 SRC: 126753
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