diff --git a/script/phase_scan_dv.py b/script/phase_scan_dv.py
index f4315e1..5d73f66 100644
--- a/script/phase_scan_dv.py
+++ b/script/phase_scan_dv.py
@@ -15,7 +15,7 @@ rf_phase_readback = ai1            # Channel(prefix + ":GET-VSUM-PHASE")
 rf_ampl_readback = ai2             # Channel(prefix + ":GET-VSUM-AMPLT")
 bpm_q = sim                        # SINEG01-DBPM340:Q1, SINEG01-DWCM170:Q_B1
 
-r = lscan(rf_phase_setpoint, [rf_phase_readback, rf_ampl_readback, bpm_x], start, stop, step , latency=0.5)
+r = lscan(rf_phase_setpoint, [rf_phase_readback, rf_ampl_readback, bpm_q], start, stop, step , latency=0.5)
 
 plot(r.getReadable(2), xdata = r.getReadable(0), title = "data")