diff --git a/secop_psi/ls370sim.py b/secop_psi/ls370sim.py
index 02a36bf..c55e298 100644
--- a/secop_psi/ls370sim.py
+++ b/secop_psi/ls370sim.py
@@ -1,77 +1,71 @@
-#!/usr/bin/env python
-#  -*- coding: utf-8 -*-
-# *****************************************************************************
-# This program is free software; you can redistribute it and/or modify it under
-# the terms of the GNU General Public License as published by the Free Software
-# Foundation; either version 2 of the License, or (at your option) any later
-# version.
-#
-# This program is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
-# details.
-#
-# You should have received a copy of the GNU General Public License along with
-# this program; if not, write to the Free Software Foundation, Inc.,
-# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-#
-# Module authors:
-#   Markus Zolliker <markus.zolliker@psi.ch>
-# *****************************************************************************
-"""a very simple simulator for a LakeShore Model 370"""
-
-from secop.modules import Communicator
-#from secop.lib import mkthread
-
-class Ls370Sim(Communicator):
-    CHANNEL_COMMANDS = [
-        ('RDGR?%d', '1.0'),
-        ('RDGST?%d', '0'),
-        ('RDGRNG?%d', '0,5,5,0,0'),
-        ('INSET?%d', '1,5,5,0,0'),
-        ('FILTER?%d', '1,5,80'),
-    ]
-    OTHER_COMMANDS = [
-        ('*IDN?', 'LSCI,MODEL370,370184,05302003'),
-        ('SCAN?', '3,1'),
-    ]
-    def earlyInit(self):
-        self._data = dict(self.OTHER_COMMANDS)
-        for fmt, v in self.CHANNEL_COMMANDS:
-            for chan in range(1,17):
-                self._data[fmt % chan] = v
-        # mkthread(self.run)
-
-    def do_communicate(self, command):
-        # simulation part, time independent
-        for channel in range(1,17):
-            _, _, _, _, excoff = self._data['RDGRNG?%d' % channel].split(',')
-            if excoff == '1':
-                self._data['RDGST?%d' % channel] = '6'
-            else:
-                self._data['RDGST?%d' % channel] = '0'
-
-        chunks = command.split(';')
-        reply = []
-        for chunk in chunks:
-            if '?' in chunk:
-                reply.append(self._data[chunk])
-            else:
-                for nqarg in (1,0):
-                    if nqarg == 0:
-                        qcmd, arg = chunk.split(' ', 1)
-                        qcmd += '?'
-                    else:
-                        qcmd, arg = chunk.split(',', nqarg)
-                        qcmd = qcmd.replace(' ', '?', 1)
-                    if qcmd in self._data:
-                        self._data[qcmd] = arg
-                        break
-        #if command.startswith('R'):
-        #    print('> %s\t< %s' % (command, reply))
-        return ';'.join(reply)
-
-    #def run(self):
-    #    # time dependent simulation
-    #    while True:
-    #        time.sleep(1)
+#!/usr/bin/env python
+#  -*- coding: utf-8 -*-
+# *****************************************************************************
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# Module authors:
+#   Markus Zolliker <markus.zolliker@psi.ch>
+# *****************************************************************************
+"""a very simple simulator for a LakeShore Model 370"""
+
+from secop.modules import Communicator
+
+class Ls370Sim(Communicator):
+    CHANNEL_COMMANDS = [
+        ('RDGR?%d', '1.0'),
+        ('RDGST?%d', '0'),
+        ('RDGRNG?%d', '0,5,5,0,0'),
+        ('INSET?%d', '1,5,5,0,0'),
+        ('FILTER?%d', '1,5,80'),
+    ]
+    OTHER_COMMANDS = [
+        ('*IDN?', 'LSCI,MODEL370,370184,05302003'),
+        ('SCAN?', '3,1'),
+    ]
+    def earlyInit(self):
+        self._data = dict(self.OTHER_COMMANDS)
+        for fmt, v in self.CHANNEL_COMMANDS:
+            for chan in range(1,17):
+                self._data[fmt % chan] = v
+        # mkthread(self.run)
+
+    def do_communicate(self, command):
+        # simulation part, time independent
+        for channel in range(1,17):
+            _, _, _, _, excoff = self._data['RDGRNG?%d' % channel].split(',')
+            if excoff == '1':
+                self._data['RDGST?%d' % channel] = '6'
+            else:
+                self._data['RDGST?%d' % channel] = '0'
+
+        chunks = command.split(';')
+        reply = []
+        for chunk in chunks:
+            if '?' in chunk:
+                reply.append(self._data[chunk])
+            else:
+                for nqarg in (1,0):
+                    if nqarg == 0:
+                        qcmd, arg = chunk.split(' ', 1)
+                        qcmd += '?'
+                    else:
+                        qcmd, arg = chunk.split(',', nqarg)
+                        qcmd = qcmd.replace(' ', '?', 1)
+                    if qcmd in self._data:
+                        self._data[qcmd] = arg
+                        break
+        #if command.startswith('R'):
+        #    print('> %s\t< %s' % (command, reply))
+        return ';'.join(reply)