Tsys is taken daily with the interim correlator. The
same signal is sent to all 4 interim correlator board (sbc's). On
18Aug12 (after an aeronomy run) tsys polA from sbc4 was higher than
the values from polA sbc1-3. This continued will 27Aug12. The
problem properties were:
The temperature was stable over many days.
The amount of temperature difference depended on the bandwidth
the interim correlator was using.