rtl_sdr:tldr:a7e6a

rtl_sdr: Read a specified number of samples.

rtl_sdr

$ rtl_sdr -f ${100000000} -n ${20} -

try on your machine

The command you mentioned is for utilizing an RTL-SDR software-defined radio receiver device on a Linux system. Here's an explanation of each part of the command:

rtl_sdr: This is the command itself, which invokes the RTL-SDR tool. It allows you to receive and process radio signals using an RTL2832U-based DVB-T (Digital Video Broadcasting – Terrestrial) receiver.
-f ${100000000}: This is an option used to specify the frequency (in Hz) at which you want to tune your RTL-SDR receiver. In this case, it is set to 100,000,000 Hz (or 100 MHz). You can replace this value with the desired frequency you wish to receive signals from.
-n ${20}: This option determines the number of samples the receiver should collect before processing. Here, it is set to 20 samples. Again, you can modify this value based on your requirements.
-: The hyphen ("-") is used as the last part of the command to specify that the output of the rtl_sdr command should be sent to the standard output (stdout) rather than being saved to a file. This allows you to view or further process the received data in real-time or redirect it to another program or utility.

Overall, the command tunes the RTL-SDR receiver to a specific frequency, captures a specified number of samples, and outputs the received data to the console.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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