rtl_sdr:tldr:cd8f7

The command "rtl_sdr -f ${100000000} -b ${9999999} -" is an example of a command used with the RTL-SDR software-defined radio (SDR) receivers.

Here is the breakdown of each component in the command:

• "rtl_sdr": This is the command used to invoke the rtl_sdr program, which is the main executable for the RTL-SDR receiver.
• "-f ${100000000}": This option specifies the frequency at which the RTL-SDR receiver should tune. In this example, it is set to 100,000,000 Hz (or 100 MHz). You can replace the "${100000000}" placeholder with the desired frequency.
• "-b ${9999999}": This option sets the baseband sample rate of the RTL-SDR receiver. In this example, it is set to 9,999,999 Hz (or 9.999999 MHz). Similar to the frequency option, you can replace the "${9999999}" placeholder with the desired baseband sample rate.
• "-": The hyphen at the end of the command is used to indicate that the command should read input from stdin (standard input) instead of a file. This allows the rtl_sdr program to continuously stream and process radio signals in real-time.

Overall, this command tells the RTL-SDR receiver to tune to a specific frequency with a certain baseband sample rate and continuously stream the received signals.