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András Retzler 2015-11-11 01:05:42 +01:00
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@ -17,7 +17,7 @@ This document is about using [GNU Radio](#using-a-raspberry-pi-as-remote-softwar
* [Using ADPCM codec to decrease network usage while streaming](#using-adpcm-codec-to-decrease-network-usage-while-streaming)
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![Warning](/images/lpf-warning.png?raw=true)
![Warning](/images/bpf-warning.png?raw=true)
<br /><br />
The output of the Raspberry Pi GPIO 18 is a square wave, which contains harmonics.<br />
For example, if you transmit on 28 MHz, you will also transmit on: