diff --git a/site_ansto/instrument/config/hmm/hmm_configuration_common_1.tcl b/site_ansto/instrument/config/hmm/hmm_configuration_common_1.tcl
index dab851a9..908846ae 100644
--- a/site_ansto/instrument/config/hmm/hmm_configuration_common_1.tcl
+++ b/site_ansto/instrument/config/hmm/hmm_configuration_common_1.tcl
@@ -1,5 +1,5 @@
-# $Revision: 1.25 $
-# $Date: 2007-11-07 04:47:34 $
+# $Revision: 1.26 $
+# $Date: 2007-11-08 21:34:17 $
 # Author: Ferdi Franceschini
 # Based on the examples in the hs_test.tcl sample configuration by Mark Lesha.
 # http://gumtree.ansto.gov.au:9080/nbicms/bragg-systems/histogram-server/hs_test.tcl/view
@@ -943,11 +943,11 @@ proc ::histogram_memory::get_frame_freq {} {
 # @brief Sets the histogram memory frame frequency to the given value.
 #
 # @param freq Frequency in Hz.\n
-# @param frame_source INTERNAL (default) or EXTERNAL
+# @param frame_source INTERNAL or EXTERNAL(default)
 #
 # If freq=0 then it sets the frequency to 50Hz with an internal frame source. This is useful 
 # if you are setting the frequency from a chopper which is stopped.
-proc ::histogram_memory::set_frame_freq {freq {frame_source INTERNAL}} {
+proc ::histogram_memory::set_frame_freq {freq {frame_source EXTERNAL}} {
   variable state
   # Frame source for each instrument if freq = 0, this can happen when automatically
   # setting frequencies from choppers.