Task #8612: better message in BBS

CEP/Calibration/BBSKernel/src/MeasurementExprLOFAR.cc

@@ -860,7 +860,9 @@ void MeasurementExprLOFAR::setCorrelations(bool circular)
     if(circular)
     {
         LOG_DEBUG_STR("Visibilities will be simulated using circular-RL"
-            " correlations.");
+            " correlations. Instrument tables are interpreted as linear"
+            " so when applying them the visibilities will be converted to"
+            " linear and back.");
         itsCorrelations.append(Correlation::RR);
         itsCorrelations.append(Correlation::RL);
         itsCorrelations.append(Correlation::LR);