diff --git a/script/jitter_scan.py b/script/jitter_scan.py
index 3a24efe..434a869 100644
--- a/script/jitter_scan.py
+++ b/script/jitter_scan.py
@@ -22,7 +22,7 @@ print "Stop = ", stop
 print "Step = ", step
 
 # controlled variabales
-cv_rf_phase = PV2(SECTION + "-RLLE-DSP:PHASE-REFERENCE",'d')
+cv_rf_phase = PV2(SECTION + "-RLLE-DSP:PHASE-REFERENCE")
 a = cv_rf_phase.read()
 print "a= " , a
 #cv_rf_amplt = ChannelDouble(SECTION + "-RLLE-DSP:AMPLT-REFERENCE")