diff --git a/applications/apertif/commissioning/tests/verify_correlator_db_output.py b/applications/apertif/commissioning/tests/verify_correlator_db_output.py
index 3d23a00d570a4bf897ed9fa66ccc1c7dec9f0799..adebd31b91ab873a240f6368229c3dbcd1b94c06 100644
--- a/applications/apertif/commissioning/tests/verify_correlator_db_output.py
+++ b/applications/apertif/commissioning/tests/verify_correlator_db_output.py
@@ -37,7 +37,7 @@
    # -v 0, 1, 2 or 3 for regression test
    
    # At central correlator verify expected result via DB
-   > python $RADIOHDL/applications/apertif/commissioning/tests/verify_correlator_db_output.py -v 3 --tel a --unb 0 --fn 0:3 --bn 0:3
+   > python $RADIOHDL/applications/apertif/commissioning/tests/verify_correlator_db_output.py -v 3 --tel a --unb 0 --fn 0:3 --bn 0:3 --beamlets 0 --channels 0
 """
 
 ###############################################################################
@@ -161,9 +161,13 @@ for bui in beamlets:
         # Verification per PN
         for ni,nr in enumerate(tc.nodeNrs):  # loop PN
             # Get read packet data
-            reportStr = 'unb = %2d, pn = %d, bui = %3d, ch = %2d : ' % (unb, pn, bui, ch)
             rdData = dbOutputReadData[ni]
             
+            # Get packet info
+            unb = nr / nof_pn       # = range(N_band) = 0:15 = [0:127] / 8
+            pn  = nr % nof_pn       # = range(nof_pn) = 0:7 = [0:127] % 8
+            reportStr = 'unb = %2d, pn = %d, bui = %3d, ch = %2d : ' % (unb, pn, bui, ch)
+
             ###################################################################
             # Verify header fields
             unb = nr / nof_pn       # = range(N_band) = 0:15 = [0:127] / 8