how to create a PAL decoder grc step by step in gnuradio grc
时间: 2024-05-21 17:15:09 浏览: 20
To create a PAL decoder in GNU Radio Companion (GRC), follow these steps:
1. Open GNU Radio Companion (GRC) and create a new flowgraph.
2. Drag and drop a "File Source" block onto the flowgraph workspace.
3. Double click on the "File Source" block and select the PAL audio file that you want to decode.
4. Drag and drop a "Quadrature Demod" block onto the flowgraph workspace.
5. Connect the output of the "File Source" block to the input of the "Quadrature Demod" block.
6. Drag and drop a "Low Pass Filter" block onto the flowgraph workspace.
7. Connect the output of the "Quadrature Demod" block to the input of the "Low Pass Filter" block.
8. Double click on the "Low Pass Filter" block and set the cutoff frequency to 4.5 kHz.
9. Drag and drop a "Throttle" block onto the flowgraph workspace.
10. Connect the output of the "Low Pass Filter" block to the input of the "Throttle" block.
11. Drag and drop a "PAL Decoder" block onto the flowgraph workspace.
12. Connect the output of the "Throttle" block to the input of the "PAL Decoder" block.
13. Double click on the "PAL Decoder" block and set the "Standard" to "PAL-B/G".
14. Drag and drop a "WAV File Sink" block onto the flowgraph workspace.
15. Connect the output of the "PAL Decoder" block to the input of the "WAV File Sink" block.
16. Double click on the "WAV File Sink" block and set the filename and format of the output file.
17. Save and run the flowgraph.
This should create a PAL decoder that reads in a PAL audio file, filters and demodulates it, decodes it using the PAL-B/G standard, and saves the output as a WAV file.
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