Index: work/fem/dev_comm/excitation.txt
===================================================================
--- work/fem/dev_comm/excitation.txt	(revision 23677)
+++ work/fem/dev_comm/excitation.txt	(revision 23678)
@@ -23,8 +23,12 @@
 fc.
 
 User Inputs:
-   center frequency
-f0=____number___Hz
+ fc0
+   short name: center frequency
+   type: integer
+   unit: Hz
+   range: 1000 .. 1000000
+   help: longer text explaining what it is - optional, if not needed, it should be empty
 
     20db cutoff frequency
 fc=____number____Hz (bandwidth = 2*fc)