diff --git a/script/jitter_scan.py b/script/jitter_scan.py
index f9d2979..eec4da2 100644
--- a/script/jitter_scan.py
+++ b/script/jitter_scan.py
@@ -21,7 +21,8 @@ print "Stop = ", stop
 print "Step = ", step
 
 # controlled variabales
-cv_rf_phase = PV("my1", SECTION + "-RLLE-DSP:PHASE-REFERENCE")
+#cv_rf_phase = PV("my1", SECTION + "-RLLE-DSP:PHASE-REFERENCE")
+cv_rf_phase = PV("my1", SECTION + "-RLLE-REF10:SIG-AMPLT-JIT-P2P-REL")
 cv_rf_phase.initialize()
 val = cv_rf_phase.read()
 print "val= " , val