Receivers

The IF bandwidth of all heterodyne receivers is 500 MHz, except for 230G2 which, coupled to the 1MHz filter bank, has a 1 GHz bandwidth. The following table lists the present possible receiver combinations:

Receivers 4-Rec. 3-Rec.

3mm1 * * * *

3mm2 * *

2mm *

230G1 * * * *

230G2 * *

The second 3 mm receiver (3mm2) can be used simultaneously with the 3mm1 receiver and the 230G1 with a high efficiency. Four receiver operation (3mm1+3mm2+230G1+230G2) is possible, but it results in a significant increase in the noise of 230G2.

• 3 mm SIS receivers
• 2 mm Receiver
• 1.3 mm Receivers
• 0.8 mm Receiver, bolometers
• Efficiencies, error beam, interferences
• Polarimeter
• General point about receiver operations