Added verify that auto correlation visibilities are > 0 and real.

applications/apertif/commissioning/tests/verify_correlator_db_output.py

@@ -302,10 +302,11 @@ for bui in beamlets:
             rdVisibilities = []
             even = True
             for data in rdPayload:
+                dataNtoh = cm.reverse_word(data)    # change endianess
                 if even:
-                    visReal = cm.to_signed(data, 32)
+                    visReal = cm.to_signed(dataNtoh, 32)
                 else:
-                    visImag = cm.to_signed(data, 32)
+                    visImag = cm.to_signed(dataNtoh, 32)
                     rdVisibilities.append(complex(visReal, visImag))
                 even = not even
                     
@@ -315,15 +316,31 @@ for bui in beamlets:
             nonZeroTp = apr.tp_pairs_to_active_tp(nonZeroTpPairs)
             nonZeroDishes = apr.tp_to_dish_indices(nonZeroTp)
             nonZeroPolarizations = apr.tp_to_pol_indices(nonZeroTp)
+            nonZeroAutoVisibilities = apr.get_auto_visibilities(nonZeroTp)
 
-            # Assume the BF weights have been set to select at least one ADC input per CB then the input (sky) noise at the ADC
-            # will contribute to all channels, so the visibilities for the TP pairs of active TP will then be none zero.
+            # Verify that the active TP yield non-zero visibilities
+            # . Assume the BF weights have been set to select at least one ADC input per CB then the input (sky) noise at the ADC
+            #   will contribute to all channels, so the visibilities for the TP pairs of active TP will then be none zero.
             if activeTp == nonZeroTp:
                 tc.append_log(tc.V_INFO_DETAILS, reportStr + 'Non zero TP = %s : polarizations = %s and dishes = %s are OK' % (nonZeroTp, nonZeroPolarizations, nonZeroDishes))
             else:
                 tc.append_log(tc.V_ERRORS, reportStr + 'Non zero TP are wrong (read %s != %s expected)' % (nonZeroTp, activeTp))
                 tc.set_result('FAILED')
 
+            # Verify that the auto correlation visibilities for the active TP are real and > 0
+            atpFail = []
+            for ai in nonZeroAutoVisibilities:
+                atp2 = apr.visibilities_to_tp_pairs(ai)
+                atp = atp2[0][0]   # get tp from list with one tuple(tp, tp), both tp in tuple are the same index for auto correlation visibility
+                if not (rdVisibilities[ai].real>0 and rdVisibilities[ai].imag==0):
+                    atpFail.append(atp)
+                #print ai, atp2, atp, rdVisibilities[ai]
+            if len(atpFail)==0:
+                tc.append_log(tc.V_INFO_DETAILS, reportStr + 'Auto correlation for TP = %s : polarizations = %s and dishes = %s are OK' % (nonZeroTp, nonZeroPolarizations, nonZeroDishes))
+            else:
+                tc.append_log(tc.V_ERRORS, reportStr + 'Auto correlation for TP = %s : polarizations = %s and dishes = %s are wrong' % (atpFail, apr.tp_to_pol_indices(tpFail), apr.tp_to_pol_indices(tpFail)))
+                tc.set_result('FAILED')
+
 
 ###############################################################################
 # End