diff --git a/cal_tools/cal_tools/lpdlib.py b/cal_tools/cal_tools/lpdlib.py
index 9b0a5c35a3982d1d93043b241c5490ea98bb989f..f8392f7540e4a7b5fbe6518960d02476a45b2cc7 100644
--- a/cal_tools/cal_tools/lpdlib.py
+++ b/cal_tools/cal_tools/lpdlib.py
@@ -460,7 +460,13 @@ class LpdCorrections:
             * tcp://host:port to directly identify the host and port to
               connect to
             * tcp://host:port_low#port_high to specify a port range from
-              which a random port will be picked.
+              which a random port will be picked. E.g. specifying
+              
+              tcp://max-exfl016:8015#8025
+              
+              will randomly pick an address in the range max-exfl016:8015 and
+              max-exfl016:8025.
+
 
         The latter notation allows for load-balancing.