|Receiver Noise Temperature||10 - 40 K|
|Frequency Range||27 - 38.7 GHz|
|Bandwidth RF-Filters||see below|
|Feed||Primary Focus Horn|
|1. IF||2 - 4 GHz (Broadband)|
|1. Oscillator||Multiplier (24*ULO1) 1.22 - 1.488 GHz|
|2. IF||500 - 1000 MHz|
|2. Oscillator||ULO2 (x4) 937.5 MHz|
This system is equipped with 3 RF-Filters to suppress mirror frequency reception. During observation, the filter and ULO settings have to be selected according to the observation frequency (see block diagram). In March 2007 the LNA was replaced by an InP-HEMT MMIC-amplifier designed for the 9mm receiver. Therefore the noise figure at low frequencies is not ideal. The noise temperature vs frequency is shown in diagrams 1cm PFK RX Band 1 to 1cm PFK RX Band 3.
This system is part of the Primary Focus Multi Frequency Box #1 (PM 1).