diff --git a/src/osmo_gsm_tester/obj/rfemu.py b/src/osmo_gsm_tester/obj/rfemu.py
new file mode 100644
index 0000000..b2add6b
--- /dev/null
+++ b/src/osmo_gsm_tester/obj/rfemu.py
@@ -0,0 +1,57 @@
+# osmo_gsm_tester: class defining a RF emulation object
+#
+# Copyright (C) 2020 by sysmocom - s.f.m.c. GmbH
+#
+# Author: Pau Espin Pedrol <pespin@sysmocom.de>
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+from abc import ABCMeta, abstractmethod
+from ..core import log
+from ..core.event_loop import MainLoop
+
+class RFemulation(log.Origin, metaclass=ABCMeta):
+
+##############
+# PROTECTED
+##############
+    def __init__(self, conf, name):
+        """Base constructor. Must be called by subclass."""
+        super().__init__(log.C_RUN, name)
+        self.conf = conf
+
+#############################
+# PUBLIC (test API included)
+#############################
+    @abstractmethod
+    def set_attenuation(self, db):
+        """Set attenuation in dB on the configured channel"""
+        pass
+
+def get_instance_by_type(rfemu_type, rfemu_opt):
+    """Allocate a RFemulation child class based on type. Opts are passed to the newly created object."""
+    if rfemu_type == 'amarisoftctl':
+        from .rfemu_amarisoftctrl import RFemulationAmarisoftCtrl
+        obj = RFemulationAmarisoftCtrl
+    elif rfemu_type == 'minicircuits':
+        from .rfemu_minicircuits import RFemulationMinicircuitsHTTP
+        obj = RFemulationMinicircuitsHTTP
+    else:
+        raise log.Error('RFemulation type not supported:', rfemu_type)
+
+    return obj(rfemu_opt)
+
+
+
+# vim: expandtab tabstop=4 shiftwidth=4