Merge pull request 'Added extra blacklist items to rtlsdr.rst' (#11) from rtlsdr into main

Reviewed-on: #11
Reviewed-by: madrigal <madrigal@qoherent.ai>

docs/source/sdr_guides/rtlsdr.rst

@@ -74,6 +74,19 @@ If you already have other drivers installed, purge them from your system.
     sudo ln -s $CONDA_PREFIX/etc/modprobe.d/rtl-sdr-blacklist.conf /etc/modprobe.d/radioconda-rtl-sdr-blacklist.conf
     sudo modprobe -r $(cat $CONDA_PREFIX/etc/modprobe.d/rtl-sdr-blacklist.conf | sed -n -e 's/^blacklist //p')
 
+.. note::
+
+   In addition to the Radioconda blacklist file, some systems also require
+   manually blacklisting the following DVB-T modules to prevent them from
+   claiming the device:
+
+     - ``dvb_usb_rtl28xxu``
+     - ``rtl2832``
+     - ``rtl2830``
+
+   Add these entries to ``rtlsdr.conf`` (or create the file at
+   ``/etc/modprobe.d/rtlsdr.conf``) if they are not already present.
+
 5. Install a udev rule by creating a link into your radioconda installation:
 
   .. code-block:: bash