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-rw-r--r--md/notes/sdr/gnu_radio_receive_am.md8
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diff --git a/md/notes/sdr/gnu_radio_receive_am.md b/md/notes/sdr/gnu_radio_receive_am.md
index d9adac0..537e4d5 100644
--- a/md/notes/sdr/gnu_radio_receive_am.md
+++ b/md/notes/sdr/gnu_radio_receive_am.md
@@ -7,20 +7,24 @@ Lets listen to AM radio stations with AirSpyHF
## Frequencies
-For frequencies search at http://websdr.org/ find the nearset receiver
+For frequencies search at http://websdr.org/ find the nearest receiver
on the map that support AM broadcast frequencies as it will give a clue
-if propogation of time of the day is ok around your location.
+if propagation of time of the day is ok around your location.
In this example I found only few AM station in 17Mhz range at day time
to test receiver.
## GNU Radio blocks
+### Main blocks
+
Base blocks for the AM receiver. This blocks have 2 channels and those
are to test switch between two radio stations.
![AM receiver blocks](/img/sdr/airspyhf_am_receiver_blocks.png)
+### Block parameters
+
| Name | Value | Note |
| --- | --- | --- |
| band | 192000 | AirSpy samplerate, closely follows the bandwidth |