The installation of a dual channel receiver (3 and 1.3 mm bands) on Antenna 4 was delayed to August. A second one (presumably on Antenna 2) is foreseen for September. Work is in progress to upgrade all receivers to dual-channel systems by January 1995. The new receivers will have SSB tuning with 10 to 20 dB rejection, with the drawback that truly DSB tuning may not be possible at all frequencies. CO will be reachable in LSB, thus improving the sensitivity by a factor 2 as compared to the current system.
The upgrade plan also includes a complete replacement of the LO2 system, scheduled for September.
The 1.3 mm system will undergo tests during the next scheduling period, and if successful, will be made available for part time. See the ``Call for Proposals'', page , for details.