QT GUI Inspector Sink Block

Dear GNU Radio Community,

I hope this message finds you well. Currently, I am engaged in a project involving spectrum analysis through GNU Radio Companion, utilizing the QT GUI Inspector Sink block for visualizing the frequency peaks magnitudes in dB.

I am seeking guidance on a specific requirement: Is there any information about how to use this block, as there is no documentation of this block in https://wiki.gnuradio.org/index.php/Main_Page. I connected this block but there is occurring red arrow, so how to solve this problem.

Your insights or suggestions on achieving this would be immensely valuable to my project.

Thank you sincerely for your assistance.

Best regards,

Muhammad Anas