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

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.