sdr:fm
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sdr:fm [2015/08/22 23:54] r typo |
sdr:fm [2015/09/06 13:19] (current) mkie |
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| - | = FM Radio stations - Reception | + | = FM Radio |
| + | |||
| + | == FM Radio Reception | ||
| * Requires GNURadio | * Requires GNURadio | ||
| - | * Requires either an extra antenna or pressing a finger on the upper right corner where the antenna is usually soldered (then you are a human antenna ;-) ) | + | * Requires either an extranal antenna(!) or pressing a finger on the upper right corner where the antenna is usually soldered (then you are a human antenna ;-) ) |
| * Example Script: [[https://github.com/muccc/sdr-workshop/blob/master/fm_receive/fm-example.grc|FM Radio Example]] (must be opened with GNU Radio Companion) | * Example Script: [[https://github.com/muccc/sdr-workshop/blob/master/fm_receive/fm-example.grc|FM Radio Example]] (must be opened with GNU Radio Companion) | ||
| * The script can be started via the arrow in the middle of the menu | * The script can be started via the arrow in the middle of the menu | ||
| Line 7: | Line 9: | ||
| * The Frequency can be adjusted via the FFT Plot that opens when the script is started | * The Frequency can be adjusted via the FFT Plot that opens when the script is started | ||
| - | ==== FM Radio stations - Broadcast | + | == FM Radio Broadcast |
| FM Broadcast can be illegal in your country depending on which frequency you broadcast. Be sure to check the local laws before broadcasting. | FM Broadcast can be illegal in your country depending on which frequency you broadcast. Be sure to check the local laws before broadcasting. | ||
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| Explanation: | Explanation: | ||
| - | The audio source has the device name **pulse* which means it will appear as a recording device for pulseaudio. It uses a sample rate of 48KHz, which is a common sample rate for an audio output. It could have been 44.1KHz. It's set in the **audio_rate** variable. | + | The audio source has the device name **pulse** which means it will appear as a recording device for pulseaudio. It uses a sample rate of 48KHz, which is a common sample rate for an audio output. It could have been 44.1KHz. It's set in the **audio_rate** variable. |
| The audio signal is passed to the **WBFM Transmit** module which gives the frequency modulated signal as the output. Its options **Audio Rate** and **Quadrature Rate** are the input sampling rate and the output sampling rate, respectively. | The audio signal is passed to the **WBFM Transmit** module which gives the frequency modulated signal as the output. Its options **Audio Rate** and **Quadrature Rate** are the input sampling rate and the output sampling rate, respectively. | ||
sdr/fm.1440280479.txt.gz · Last modified: 2015/08/22 23:54 by r
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