RC33
Technical details

The log video was passed to an 'analogue computer' which had adjustments for Z =k r ^x where each was adjusted by front panel controls at the head site. In reality the 'x' factor was a gain control on the log video and another control added the 'k' as a log addition. This adjusted video was then passed to each iso-echo unit, one in the radar lab on top of the Redmond Barry building and the other in the regional office in the Tilley Building in Latrobe Street. The video and trigger to the Tilley building was sent on a PMG coax cable over an Ericson valve TV video link system that was prone to gain and offset variations. In time this was removed and a Bureau transistorized iso-echo system was installed in the head with relay controls be commanded over a hundred pair cable from the Bureau office. This allowed the removal of the problematic Ericson link system as only leveled video was now sent and absolute analogue amplitude was no longer required .(2)

The radar had a synchro driven servo system to produce deflection coil drive waveforms for the PPI and RHI displays and another system to produce the range and height marker. Of course these two systems would never quite remain in perfect sync causing a poor display of jittery markers.(2)

The specification of the radar includes(1) (3)

References
(1) The Melbourne Weather Radar - Working Paper No.84, Bureau of Meteorology, January 1965
(2) A.L.West (private communications)
(3) Weather Radar Signal Processing- Working Paper No.136, Bureau of Meteorology, January 1971