Receivers

All antennas are equipped with fully operational dual frequency receivers. The available frequency range is 82GHz to 116GHz for the 3mm band, and 205 to 245GHz for the 1.3mm band. The 3mm and 1.3mm receivers are aligned to within about $2''$. For details about observing at frequencies beyond the guaranteed tuning range of the 3mm and 1.3mm receivers, please get in touch with the Science Operations Group (sogiram.fr).

Antenna 6 has been equipped with a prototype new generation receiver, which can only be tuned single sideband. More Details of the prototype are described in the section PROTOTYPE OF THE NEXT GENERATION RECEIVER above. Please take these into consideration for your proposal.

For the remaining current receivers, the following rules apply: Below 105GHz, receivers offer best performances in LSB tuning with high rejection (20dB): expected system temperatures are 150 to 200K for the summer time. Above 105GHz, best performances are obtained with USB tuning, low rejection (4 to 6dB): expected system temperatures are 300 to 450K at 115GHz. DSB tuning is possible over the whole frequency range, but the system temperature may degrade significantly.

The current 1.3mm receivers can only be tuned double sideband. Expected (LSB and USB) system temperatures are 500K at 230GHz for sources at declinations higher than 20$^{\circ}$.