diff --git a/cali.py b/cali.py
index cd4e31a..c29c355 100644
--- a/cali.py
+++ b/cali.py
@@ -77,9 +77,21 @@ def main(input):
                     result.append([channel, block, cf, dab_snr, dab_block_detected, dab_ppm])
 
             else:
-                print("Scanning only channel #", c)
+                channel = c
+                for i in range(len(dabchannels["dab"])):
+                    if dabchannels["dab"][i]['block'] == c:
+                        channel = i
+                        break
+                if(channel == c):
+                    try:
+                        channel = int(c)
+                    except:
+                        raise Exception('Channel "' + c + '" not found')
+                    if(channel < 0 and channel >= len(dabchannels["dab"])):
+                        raise Exception('Index "' + channel + '" not defined')
+
+                print("Scanning only channel #", dabchannels["dab"][channel]['block'])
 
-                channel = int(c)
                 channel, block, cf, dab_snr, dab_block_detected, dab_ppm = \
                     cali.utils.scan_one_dab_channel(dabchannels, channel, sdr, rs, ns, rg, filename, samplerate,
                                                     show_graph, verbose)
@@ -196,4 +208,4 @@ def main(input):
     args = my_parser.parse_args()
     print(vars(args))
 
-    main(vars(args))
\ No newline at end of file
+    main(vars(args))