Update sdr notes, remove unfinished links

1 files changed, 6 insertions, 2 deletions

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 |