Receivers

All antennas are equipped with fully operational dual frequency receivers. The available frequency range is 82GHz to 116GHz for the 3mm band, and 210 to 245GHz for the 1.3mm band. The 3mm and 1.3mm receivers are aligned to within about $2''$.

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 1.3mm receivers give DSB tuning with typical T$_{\rm REC}$ below 50K. Expected SSB system temperature are 500K.

The guaranteed tuning ranges are 82-116GHz and 205-245GHz. 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 (sog@iram.fr).