diff --git a/decode_os433.py b/decode_os433.py
index c88ee1b..3a10e3f 100755
--- a/decode_os433.py
+++ b/decode_os433.py
@@ -41,7 +41,7 @@ def __init__(self, center_freq, offset_freq, decimate_am=1, play_audio=False):
 
 		self.osmosdr_source = osmosdr.source_c("")
 		self.osmosdr_source.set_center_freq(freq)
-		self.osmosdr_source.set_samp_rate(device_rate)
+		self.osmosdr_source.set_sample_rate(device_rate)
 
 		taps = firdes.low_pass(1, device_rate, 40000, 5000, firdes.WIN_HAMMING, 6.76)
 		self.freq_filter = gr.freq_xlating_fir_filter_ccc(25, taps, -freq_offs, device_rate)
@@ -92,8 +92,7 @@ def decode_osv1(stream, level=-0.35):
 
 	for direction, time, abstime in transition(stream, level):
 		# convert the time in samples to microseconds
-		time = time / float(stream.rate) * 1e6 
-
+		time = time / float(stream.rate) * 1e6
 		if state == 'wait' and direction is True:
 			# Start of the preamble
 			state = 'preamble'
@@ -108,7 +107,7 @@ def decode_osv1(stream, level=-0.35):
 				else:
 					state = 'wait'
 			else:
-				if (700 < time < 1400):
+				if (700 < time < 1500):
 					# Valid rising edge in preamble
 					pass
 				elif count>8 and (2700 < time < 5000):
@@ -157,7 +156,7 @@ def decode_osv1(stream, level=-0.35):
 					state = 'wait'
 			else:
 				# Falling edge (end of HIGH level)
-				if (1500 < time < 2500):
+				if (1300 < time < 2500):
 					if bit == 1:
 						# a short HIGH time is a repeated 1 bit
 						pkt.append(1)
@@ -220,7 +219,7 @@ def hex(self):
 	stream = rtlsdr_am_stream(freq, freq_offs, decimate_am=2, play_audio=options.audio)
 	stream.start()
 	unit = 'F'
-	for packet in decode_osv1(stream):
+	for packet in decode_osv1(stream, level):
 		flags = []
 		
 		if not packet.valid: