diff --git a/grc/m17_m17_coder.block.yml b/grc/m17_m17_coder.block.yml
index c26c70a..462b273 100644
--- a/grc/m17_m17_coder.block.yml
+++ b/grc/m17_m17_coder.block.yml
@@ -89,7 +89,7 @@ outputs:
   optional: 0
 
 documentation: |-
-     The m17-coder block reads a byte datastream clocked at 200 bits/s and outputs a real stream at 24 times this input rate (4800 Hz). The source and destination fields are 9-character callsign strings, the type field is a 0-65535 value and the meta field a free string which can be updated during transmission.
+     The encoder block reads a datastream (as 16-byte vectors) clocked at 3200 bits/s and outputs a stream of symbols (as floats) at 4800 Hz. The source and destination fields are 9-character callsign strings, the TYPE field is generated based on drop-down menu entries and the META field a free string or byte array that can be updated at runtime.
 
 #  'file_format' specifies the version of the GRC yml format used in the file
 #  and should usually not be changed.