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LAUNCHXL-CC1352P: Is the RSSI of continuous RX correct?

Part Number: LAUNCHXL-CC1352P
Other Parts Discussed in Thread: CC1352P

I am evaluating CC1352P using SmartRF Studio.

Connect the signal generator to the evaluation board with a coaxial cable and input a -30 dBm signal from the signal generator.
Set the evaluation board to 429.5 MHz in continuous RX mode and change the output frequency of the signal generator by 12.5 kHz in increments, and the result is shown in the image below.

I thought the RSSI waveform would have a single peak at 429.5 MHz like the blue line.
In reality, the waveform became an RSSI waveform with multiple peaks as shown in the white line.

Is this RSSI waveform measured correctly?
If it is measured correctly, is there any inconvenience when performing carrier sense?