diff --git a/signalgen.py b/signalgen.py
index c96980d..ece4d6b 100755
--- a/signalgen.py
+++ b/signalgen.py
@@ -132,7 +132,7 @@ def addBurst(values):
 	logger.info(f"{basename} loaded. Sampling {pulseNum} pulse(s) {values.nsamp} times.")
 	starts = np.linspace(samples//4, 3*(samples//4), num=pulseNum, dtype=int)
 	while pulseNum > 0:
-		start = starts[pulseNum]
+		start = starts[pulseNum-1]
 		#create pulse
 
 		#check if this is part of a rng run